Page 1 AT&T PRACTICE Task Oriented Practice (TOP) SWITCH SWITCHING NETWORK NETWORK CLOCK FRAME (NETWORK CLOCK AND SYSTEM CLOCK) TOP Comments Hot Line: Monday through Friday 8:00 a.m. - 4:00 p.m. Eastern Time Call: 1-800-334-0404 Or FAX to: 1-910-727-3043 Issue 8 DEC 1995 234-151-013 TITLE PAGE...
Page 2 Copyright© 1995 AT&T All Rights Reserved This material is protected by the copyright and trade secret laws of the United States and other countries. It may be reproduced, distributed, or altered in any fashion by any entity including other AT&T Business Units or Divisions without the expressed written consent of the Customer Education and Training Organization. For permission to reproduce or distribute, please contact: 4ESS Switch Documentation...
Page 3 FIND YOUR JOB IN THE LIST BELOW ....THEN GO TO Acceptance ........... NTP-002 All Pending TLP Searches Inhibited —...
Page 4 FIND YOUR JOB IN THE LIST BELOW ....THEN GO TO Maintenance Philosophy ..........TAD-100 Meters —...
Page 5 FIND YOUR JOB IN THE LIST BELOW ....THEN GO TO Suspect Clock Chain — Diagnostic Failure — Isolate ....... TAP-136 Switches —...
Page 6 FIND YOUR JOB IN THE LIST BELOW ....THEN GO TO TTY Printout — DGN:NCLK 0,CHAIN a PH b STF ANALY:TLPFILE:NCLK 0,CHAIN a SUSPECTED FAULTY EQUIPMENT Note Column Contains NOTE 2 Fuse Blown —...
Page 7 FIND YOUR JOB IN THE LIST BELOW ....THEN GO TO TTY Printout — DGN:NCLK 0,CHAIN a PH b STF ANALY:TLPFILE:NCLK 0,CHAIN a 0 TLP PROGRAM ABORTED .
Page 8 FIND YOUR JOB IN THE LIST BELOW ....THEN GO TO TTY Printout — DGN:SCLK 0, { IPUB a|CONTR b|NCSU 0} PH c STF ANALY:TLPFILE:SCLK 0 { IPUB a|CONTR b|NCSU 0} SUSPECTED FAULTY EQUIPMENT Note Column Contains NOTE 2 No Fuse Blown...
Page 9 FIND YOUR JOB IN THE LIST BELOW ....THEN GO TO TTY Printout — DGN:SCLK 0, IPUB a|CONTR b|NCSU 0 PH c STF ANALY:TLPFILE SCLK 0, IPUB a|CONTR b|NCSU 0 CURRENT TLP SEARCH ABORTED ALL PENDING TLP SEARCHES INHIBITED .
Page 10 No acceptance test procedures are required for this frame. The readiness of this frame to become a part of the working system was established by the successful completion of Installation Handbook test procedures. Issue 8 DEC 1995 234-151-013 PAGE 1 of 1 ACCEPTANCE...
Page 11 DO THE ITEMS BELOW IN THE ORDER LISTED ..FOR DETAILS, GO TO Check for Open Diodes in FB211 Circuit Pack DLP-534 Check for Shorted Diodes in FB211 Circuit Pack DLP-535 Issue 8 DEC 1995 234-151-013...
Page 12 DO THE ITEMS BELOW IN THE ORDER LISTED ..FOR DETAILS, GO TO On Power Switch, Rotate ROS/OFF Switch to ROS Response: OS and OFF NORM Lamps Light, ACK Lamp Lights Momentarily —...
Page 13 DO THE ITEMS BELOW IN THE ORDER LISTED ..FOR DETAILS, GO TO On Power Switch, Rotate ROS/OFF Switch to ROS Response: OS and OFF NORM Lamps Light, ACK Lamp Lights Momentarily —...
Page 14 DO THE ITEMS BELOW IN THE ORDER LISTED ..FOR DETAILS, GO TO Call U.S. Bureau of Standards Time Announcement, 303-499-7111, and Listen for Time Announcements — Which Occur Every Minute on the Minute (Ignore Hours Announced; They Are in Greenwich Mean Time) Type in Local Mode (but Do Not Send) OP:CLK! —...
Page 15 DO THE ITEMS BELOW IN THE ORDER LISTED ..FOR DETAILS, GO TO CAUTION: System Clock Update Must Be Accomplished Between 2:02 AM and 2:12 AM. Review Procedure and — Notify Network Management of Impendent Time Change Call U.
Page 16 DO THE ITEMS BELOW IN THE ORDER LISTED ..FOR DETAILS, GO TO On Clock Chain Power Switch, Rotate ROS/OFF Switch to ROS — Response: OS and OFF NORM Lamps Light, ACK Lamp Lights Momentarily Remove 39B Oscillator DLP-537 Install 39B Oscillator...
Page 17 DO THE ITEMS BELOW IN THE ORDER LISTED ..FOR DETAILS, GO TO Replace Converter DLP-509 If Replaced Converter Is Type J87389, Adjust Associated 39B Oscillator Frequency DLP-512 Rotate ROS/OFF Switch to Normal Position —...
Page 18 DO THE ITEMS BELOW IN THE ORDER LISTED ..FOR DETAILS, GO TO CAUTION: Clock Chain Having Oscillator Checked Must Be Powered Down Connect Oscillator Manual Adjustment Unit to J20 Connector of 39B Oscillator DLP-532 Check Full Frequency Range of Oscillator DLP-520...
Page 19 DO THE ITEMS BELOW IN THE ORDER LISTED ..FOR DETAILS, GO TO On Clock Chain Power Switch, Rotate ROS/OFF Switch to ROS — Response: OS and OFF NORM Lamps Light, ACK Lamp Lights Momentarily Remove DRO Oscillator DLP-545 Install DRO Oscillator...
Page 20 DO THE ITEMS BELOW IN THE ORDER LISTED ..FOR DETAILS, GO TO CAUTION: Clock Chain Having Oscillator Checked Must Be Powered Down Connect Oscillator Manual Adjustment Unit to J20 Connector of DRO Oscillator DLP-532 Check Full Frequency Range and Alarm Bits of DRO Oscillator DLP-542...
Page 21 GENERAL I/O message manuals. Symptoms described in IXL reflect the previous assumptions and indicate other conditions, The maintenance philosophy contained in this volume is observable at the frame, that would enable the user to based upon the design of equipment (hardware), access the proper trouble-clearing procedure.
Page 22 part is always assumed to be good and equipment used additional knowledge and skill in the setup and use of for testing both built-in and commercial hardware and test equipment (oscilloscopes, voltmeters, etc.). software is assumed to be good. ALTERNATE METHODS The trouble-clearing TAPs provided for diagnostic failures are provided on three levels.
Page 23 OFF SW ON SW LAMP TEST SW OFF SW PWR OFF OFF & ON SW OFF NORM (ROS) OFF KEY ON SW (ROS) ON SW Issue 8 DEC 1995 234-151-013 PAGE 1 of 1 POWER SWITCH...
Page 24 [1] See CAUTIONS 1 and 2. Identify first pack on TLP list located in suspect clock chain [4] If chain was removed from service with TTY message, enter [3] Is RST:NCLK 0,CHAIN diagnostic = ATP chain result ATP (Response: RST:NCLK 0 CHAIN a COMPL) [2] Replace pack [DLP-500] [10] Clear...
Page 25 [15] Clear [12] See NOTE 1. Enter [14] Does TLP [13] Did diagnostic RST:NCLK 0,CHAIN ; UCL! list suspect restoral failure by a = suspect faulty chain equipment that has complete analyzing raw not been replaced data [TAP-105] Page 3 [16] Enter RMV:NCLK 0,CHAIN a! a = chain with next highest...
Page 26 [21] On summary data printout, does [19] Is [20] Is any TABLE A address phase 4 ATP phase 1 ATP appear in CD line word [Figure 1] [24] Clear [23] Is bit 4, diagnostic 5, or 7 set in [22] Clear failure by word to right of diagnostic...
Page 27 [1] See CAUTION 1. Identify first pack on TLP list located in failed SCLK half [3] Is ATP/CATP diagnostic result [2] Replace pack [DLP-500] [4] Have all [6] Clear diagnostic listed packs in failed SCLK failure by analyzing raw half been replaced data [TAP-105] [5] Repeat from...
Page 28 [1] See CAUTION 1. Identify first pack on TLP list located in failed NCSU [3] Is ATP/CATP diagnostic result [2] Replace pack [DLP-500] [4] Have all [6] Clear diagnostic listed packs failure by analyzing in failed NCSU raw data [TAP-105] been replaced [5] Repeat from Step 2 for...
Page 29 SUMMARY if doloops were used and identify their location and Read first failing phase prologue. Determine if subroutines function. Use knowledge of first failing test were used and identify their location and function. Locate function to identify and replace any suspect packs other first failing test and determine test function.
Page 30 NUMBER OF SUPPLEMENTARY NUMBER OF MISMATCHES DATA WORDS TO FOLLOW BEFORE PRINT BUFFER OVERFLOWED NUMBER OF DOLOOP DATA FAILING WORDS TO FOLLOW TEST SKIPPED CODE PHASE NUMBER OF SUBROUTINE DGN: SCLK 0, CONTR 0 PH 2 STF-BOF (16,00000000 000000000) MSG IP DATA WORDS TO FOLLOW TEST MISMATCH...
Page 31 [5] Determine location and function STM3 PUMACRO OPER (READ), OPAD(=4DZWMPMACRO), DATA (4DZDATA), of subroutines [DLP-501] TESTCNT(=0), ATERM, TIMEOUT(=30000) [6] Locate fourth raw data Figure 2 — Example of PUMACRO DIAL Statement word following mismatch data [Figure 1, Page 2] (first failing address) [9] See NOTE 2.
Page 32 [12] See NOTE 3. Read prologue of program unit containing first failing test [13] Analyze failing test data to determine failing test function [DLP-502] [16] Is this digit zero [14] On raw data printout, locate Page 5 fifth word from mismatch (no doloops) data [Figure 1, Page 2] [15] Locate seventh digit in...
Page 33 [21] See NOTE 4. Using PR prologue data, knowledge of failing test [24] Have packs function, failing bits [20] Is trouble not previously indicated by mismatch Page 6 replaced been in NCSU data, and appropriate identified SDs, identify suspect packs not previously replaced [TABLE C] [23] See NOTE 4.
Page 34 [26] See NOTE 5. [28] Type Replace pack appropriate [27] Is ATP/CATP (except FB211 TABLE D restore diagnostic type) [DLP-500] result message (Response: (FB211 type) RST:COMPL) [DLP-511] [29] Any more suspect packs to be replaced [30] Was failing TABLE D [31] Call DIAL statement RST:NCLK 0,CHAIN a!
Page 35 SUMMARY used, attach external sweep trigger to 0/1-60-36 Enter TABLE A messages. Verify first failing test raw data terminal 104. Using raw data analysis information obtained in TAP-105, SDs/CDs, and circuit pack SDs, trace signal printed twice. Resend last TABLE A message with RPT option deleted for infinite loop.
Page 36 [8] Set up infinite [14] See NOTE 2. Using loop by entering raw data analysis [9] Was message 3, [TABLE A, information, SDs/CDs, [13] Set SYNC option Page 1], deleting and circuit pack SDs, up scope used [TABLE A] RPT 2 option. trace signal path of (Response: LOOPING failing bits to isolate...
Page 37 [15] Enter OP:MACLI,CLASS MTCE! [16] Enter [19] Set up loop STOP:MACLI,CLASS MTCE,SUBCLASS a! again using TABLE A, [18] Is a = subclass assigned faulty NCLK/SCLK Page 1, messages (delete diagnostic (see previous message response) RPT) or DLP-508, if result required, and ATP/CATP repeat from Step 14, Page 2...
Page 38 SUSPECTED [7] Clear diagnostic FAULTY failure using TLP [2] Is NCLK/SCLK/NCSU [5] See NOTE 1. [1] See CAUTION 1. EQUIPMENT suspect pack list failing diagnostic Enter Is printed [TAP-102] for NCLK; in UTYMN column response OP:TLPQUEUE;ALL! [TAP-103] for SCLK; or of response [TAP-104] for NCSU NULL PACK TEST GENERATED...
Page 39 SUSPECTED [7] Clear diagnostic [1] See CAUTION 1. FAULTY failure using TLP Enter [2] Is code [5] See NOTE 1. EQUIPMENT suspect pack list DGN: message 0002 still Is printed [TAP-102] for NCLK; listed in TABLE A obtained response [TAP-103] for SCLK; or for NCLK/SCLK/NCSU [TAP-104] for NCSU NULL PACK TEST GENERATED...
Page 40 SUSPECTED [11] Clear diagnostic [8] Type INIT:, FAULTY [9] See NOTE 1, failure using TLP ALW:, and DGN: EQUIPMENT Page 1. Is suspect pack list messages listed printed [TAP-102] for NCLK; in TABLE B for response [TAP-103] for SCLK; or NCLK/SCLK/NCSU [TAP-104] for NCSU NULL PACK TEST GENERATED...
Page 41 SUSPECTED [4] Clear diagnostic [1] See CAUTION 1. FAULTY failure using TLP Enter ALW: and [2] See NOTE 1. EQUIPMENT suspect pack list DGN: messages Is printed [TAP-102] for NCLK; listed in TABLE A response [TAP-103] for SCLK; or for NCLK/SCLK/NCSU [TAP-104] for NCSU NULL PACK TEST GENERATED [3] Clear diagnostic...
Page 42 [1] See CAUTION 1. [2] Did TLP [3] Clear diagnostic For failing unit, abort message failure by analyzing enter appropriate reoccur raw data [TAP-105] TABLE A DGN: message SUSPECTED [6] Clear diagnostic NOTE 1 FAULTY failure using TLP [4] See NOTE 1. It may take several EQUIPMENT suspect pack list...
Page 43 [1] See CAUTION 1. If TLP tape being used is not correct issue for this generic, obtain correct TLP tape [2] Demount tape [7] Clear diagnostic SUSPECTED [DLP-510] failure using TLP FAULTY [5] See NOTE 1. suspect pack list EQUIPMENT Is printed [TAP-102] for NCLK;...
Page 44 [1] See CAUTION 1. If TLP tape being used does not contain NCLK/SCLK/NCSU data file, obtain correct TLP tape [2] Demount tape SUSPECTED [7] Clear diagnostic [DLP-510] FAULTY failure using TLP [5] See NOTE 1. EQUIPMENT suspect pack list Is printed [3] Mount correct tape [TAP-102] for NCLK;...
Page 45 SUSPECTED [5] Clear diagnostic [2] Enter TABLE A FAULTY failure using TLP [1] See CAUTION 1. SET:, ALW:, and [3] See NOTE 1. EQUIPMENT suspect pack list Mount TLP tape DGN: messages Is printed [TAP-102] for NCLK; [DLP-506] for NCLK/SCLK/ response [TAP-103] for SCLK;...
Page 46 [2] For failing unit, type DGN:SCLK 0, CONTR a|IPUB b|NCSU 0 :TLP! [1] See CAUTION 1. or DGN:NCLK 0,CHAIN c:TLP! a = failing controller Enter member number ALW:TLP:SRCH! b = failing IPUB member number c = failing chain NOTE 1 It may take several SUSPECTED [5] Clear diagnostic...
Page 47 P/O FUSE PANEL J4A004AE NETWORK CLOCK FILTER UNIT NC00 +24V SD-4A036 +24V +24VA +24VA F001 J1A053AG TO DC +24V POWER OHT0 DISTRIBUTION CIRCUIT FS 7 +24V +24VB +24VB OHT1 FS 7 NETWORK CLOCK NC01 CONVERTER SD-4A036 J87368C FS 7 OA10 CONVERTER J87368C +24V...
Page 48 P/O FUSE PANEL FILTER UNIT J4A004AE NETWORK CLOCK +24V NC10 F011 SD-4A036 J1A053AG TO DC +24V +24VA +24VLA1 POWER DISTRIBUTION CIRCUIT +24VB +24VLB1 +24V +24VLA1 1HT0 +24VLB1 1HT1 FS 8 CONVERTER NETWORK CLOCK J87368C +24V NC11 SD-4A036 +24V 1A10 CONVERTER FS 8 J87368C FS 8...
Page 49 NETWORK CLOCK FRAME NETWORK CLOCK FRAME SD-4A014-02 SD-4A014-02 BAY 0 BAY 1 +24VA +24VLA1 FROM FROM 24V FILTER 24V FILTER UNIT UNIT +24VB +24VLB1 FROM FROM +9V DC-DC +9V DC-DC CONVERTERS CONVERTERS ISD-115 ISD-116 Issue 8 DEC 1995 234-151-013 PAGE 1 of 1 9 AND 24 VOLT FRAME DISTRIBUTION...
Page 50 ISD-117 OS and OFF NORM lamps light, ACK lamp lights [1] See CAUTION 1. Rotate momentarily ROS/OFF switch to ROS OFF NORM and PWR OFF lamps [2] Depress ROS/OFF light switch [6] Rotate Fuse [5] Does ROS/OFF switch to replaced power alarm normal position sound...
Page 51 [10] See NOTE 1. Unseat packs fed by blown fuse [TABLE A, Page 1] [13] Does [14] Investigate power alarm [11] Replace fuse fuse leads for sound short [12] Depress and hold ON switch for 2 seconds [15] Depress ROS/OFF switch [16] Remove fuse [21] Any [22] Repeat...
Page 52 [35] Is blown [29] Are any fuse indicated by packs left asterisk in unseated TABLE A, Page 1 [36] Wait 15 minutes [37] Rotate before returning unit ROS/OFF switch to [30] Depress ROS/OFF switch to service to allow normal position the phase lock ovens (OFF NORM and OS to stabilize...
Page 53 P/O FUSE PANEL +3V CONVERTER +5V CONVERTER +24V J4A004AE 023-14 019-31 J87598A J87389S NETWORK CLOCK FS 7 FS 7 POWER SWITCH +24V +24V OTDSO CHAIN 0 +5V CONVERTER 066-03 +24V FS 5 019-42 +24V -3V CONVERTER OBOA J87389S FS 7 +24VA +24V TO DC POWER...
Page 54 P/O FUSE PANEL J4A004AE NETWORK CLOCK POWER SWITCH +24V0 CHAIN 2 166-03 FS 6 -24V CONVERTER -24V CONVERTER +24VS0 1-12-22 1-12-50 -48VA -48VB 1TDSO 71G1 71G1 NETWORK CLOCK FS 8 FS 8 POWER SWITCH +24V1 CHAIN 3 +24V 1BOA +3V CONVERTER -3V CONVERTER 166-68 FS 6...
Page 55 NETWORK CLOCK FRAME NETWORK CLOCK FRAME SD-4A014-02 SD-4A014-02 BAY 0 BAY 1 FROM FRAME +24V FROM +24V CHAIN 2 POWER SWITCH FRAME CHAIN 0 POWER +24V CHAIN 3 SWITCH +24VA FROM 24V FILTER +24VA FROM UNIT +24VB 24V FILTER UNIT +24VB FROM FRAME POWER...
Page 56 ISD-121 OS and OFF NORM lamps light, ACK lamp lights [1] See CAUTION 1. Rotate momentarily ROS/OFF switch to ROS OFF NORM and PWR OFF lamps [2] Depress ROS/OFF light switch [6] Rotate Fuse [5] Does ROS/OFF switch to replaced power alarm normal position sound...
Page 57 TABLE A FUSE CONVERTERS FUSE CONVERTERS BAY 0 FED AT LOCATION BAY 1 FED AT LOCATION 0-23-14 1-23-14 0-18-14 1-18-14 0TDS0 1TDS0 0-17-06 1-17-06 0-23-14 1-23-14 0-18-14 1-18-14 0B0A 1B0A 0-17-06 1-17-06 0-12-22 1-12-22 0-19-31 1-19-31 0-23-56 1-23-56 0-18-59 1-18-59 0TDS1 1TDS1 0-17-66...
Page 58 [10] If blown fuse is ODC/1DC or 0DD/1DD, remove 0B0A/1B0A or 0BOB/1BOB, respectively [11] Unseat all converters fed by blown fuse [14] Does [15] Investigate power alarm fuse leads [12] Replace fuse if removed sound for short in Step 10 PWR OFF [13] Depress and hold ON [22] Repeat...
Page 59 [24] Depress ROS/OFF switch and remove fuse if required [29] Investigate [25] Replace converter [28] Does for short near power alarm mounting of sound converter [26] Replace blown fuse replaced [27] Replace any removed fuse, depress and PWR OFF lamp hold ON pushbutton goes off [30] Are any...
Page 60 [1] See CAUTION 1. [2] Are both [4] Does Ensure both chains [3] Replace A and B fuses replaced in bay with blown blown fuse blown [TABLE A, fuse blow fuse are powered Page 2] [5] Using TABLE A, Page 2 identify FB211 pack location common to both...
Page 61 [16] Replace FB211 [14] Were any TSI, pack providing TMS, or SCLK [17] Did clock signals to controllers removed replaced unit (user) removed from service blown fuse from service coincident with blow [DLP-511] and replace blown fuse blown fuse [18] Investigate [15] Investigate fuse leads for fuse leads for...
Page 62 [1] See CAUTION 1. Rotate ROS/OFF switch to ROS (OS and OFF NORM lamps light; ACK lamp lights momentarily) [4] Rotate ROS/OFF switch [2] Depress [3] Did counterclockwise converter to normal position pushbutton LED go off (OFF NORM and OS lamps extinguish) [7] Rotate ROS/OFF switch...
Page 63 [1] See CAUTION 1. Rotate OS and OFF NORM lamps light; ROS/OFF switch ACK lamp lights momentarily clockwise to ROS OFF NORM and PWR [2] Depress ROS/OFF OFF lamps light switch [3] Remove fuse powering [8] Rotate FB152 pack [TABLE A] [7] Is LED ROS/OFF switch lighted on...
Page 64 [1] See CAUTION 1. [2] Did Test power alarm system circuits respond ATP [DLP-503] [4] See NOTE 1. [5] At TTY, enter appropriate Do any LEDs [3] At TTY, enter change state TABLE B message, then appropriate go to associated noticeably out TABLE A message of step...
Page 65 [6] Replace out-of-step unit; [7] Did circuit pack system [DLP-500] or converter respond ATP [DLP-509] [8] At TTY, enter appropriate TABLE B message, then go to associated TAP [TABLE B, Page 1] Issue 8 DEC 1995 234-151-013 PAGE 2 of 2 CLEAR AUTOMATIC POWER MONITOR TEST FAILURE...
Page 66 [1] See CAUTION 1. Obtain volt/ohmmeter (KS-14510) OS and OFF NORM [2] At appropriate power lamps light; ACK lamp switch, rotate ROS/OFF lights momentarily switch to ROS OFF NORM and [3] Depress ROS/OFF switch PWR OFF lamps to remove power are lighted from clock chain Meter circuit...
Page 67 [14] If OVEN TEMP meter is more than 2 divisions off center, wait 10 [13] Replace [9] Is minutes; otherwise faulty switch +24 volts rotate ROS/OFF switch unit [DLP-515] present counterclockwise to normal immediately (OS and OFF NORM lamps extinguish) [10] Connect voltmeter [11] Is...
Page 68 [15] Connect [18] Move voltmeter between [16] Is [19] Is [24] Depress voltmeter lead R2 of meter and +24 volts +24 volts MSO switch to R1 of meter frame ground present present [Figure 3] [Figure 3] Page 4 [17] Use SD-4A014 and SD-4A036 to [20] Are meters check +24 volts...
Page 69 [28] Check [30] Clear [25] Does +24 [29] Is wiring between Page 8 volts drop to trouble in trouble in MSO switch 0.0 volts wiring wiring and meter [27] Use SD-4A036 and check for [31] Replace shorted CR diodes [26] Does MSO switch across solenoid meter reset...
Page 70 [32] Depress ROS/OFF switch to remove power from desired clock chain [33] Remove fuse associated with FB217 circuit pack [TABLE A] [37] Does MSO lamp [34] Remove FB217 circuit pack light and do PHASE METER from chain [TABLE A] and PHASE LOCK OVEN TEMP meter reset arms operate [35] Depress ON switch to...
Page 71 [41] Depress ROS/OFF switch to remove power from desired clock chain [42] Replace FB217 circuit pack from chain [46] Does MSO lamp [43] Replace fuse removed light and do PHASE METER in Step 33, Page 5 Page 7 and PHASE LOCK OVEN TEMP meter reset arms operate [44] Depress ON switch to...
Page 72 [49] Depress ROS/OFF switch TABLE B to remove power from CLOCK FA627 desired clock chain CHAIN LOCATION 070-23 [50] Replace FA627 [TABLE B] 070-48 circuit pack with spare 170-23 [53] Does MSO lamp 170-48 light and do PHASE METER and PHASE LOCK OVEN [51] Depress ON switch to restore power to clock TEMP meter reset arms...
Page 73 [57] Depress ROS/OFF switch to remove power from clock chain [58] At front of frame, install network clock chain control cover and retaining screws [Figure 1, Page 1] [59] At rear of frame, install six screws holding rear of network clock chain control cover [60] Depress ON pushbutton to restore power to clock chain...
Page 74 [1] See CAUTION 1. Obtain volt/ohmmeter (KS-14510) [2] At appropriate power switch, [7] Using ohmmeter, ensure ROS/OFF switch is measure resistance rotated to ROS (OS and [4] Is between pin 3 of OFF NORM lamps lighted) clock chain switch [Figure 2] cover removed and positive (+) [3] Depress ROS/OFF switch to...
Page 75 [10] Operate PLS switch [12] Is [13] Replace resistance PLS switch and [11] Using ohmmeter, measure less than repeat from resistance between pin 3 of 1 ohm Step 7, Page 1 switch [Figure 2, Page 1] and negative (—) terminal of coil [Figure 3, Page 1] [14] At front of frame, install network clock chain control...
Page 76 TTY output message [1] See CAUTION 1. At TTY, enter RMV:NCLK 0 CHAIN a RMV:NCLK 0,CHAIN a! COMPL a = clock chain 0-3 [2] Replace FB217 circuit [5] At TTY, enter pack [DLP-500] associated [4] Does PHASE RST:NCLK 0,CHAIN a! with clock chain being LOCK OVEN TEMP a = clock chain 0-3...
Page 77 [10] Install FB214 circuit pack and fuse removed in Step 6, Page 1, but do not restore power or chain to service [DLP-500] [14] Check [13] Does meter oscillator indicate less [11] Replace meter [DLP-516] phase control than 2 divisions and monitor from zero circuits (SD-4A036)
Page 78 [1] See CAUTION 1. Replace FB211 circuit pack [DLP-511] in first location listed under (A fuse) or across (B fuse) from fuse that failed voltage test [TABLE A] [2] Remove fuse that failed voltage test Page 2 [3] Measure fuse socket voltage TABLE A FB211 PACK LOCATION TO FUSE ASSIGNMENT...
Page 79 [4] Is voltage [6] Replace equal to or fuse removed greater than in Step 2, 0.5 volts Page 1 [5] See NOTE 1. [7] Have all Repeat from Step 1 fuses that failed using next location voltage test been listed under or trouble cleared across [TABLE A, Page 1]...
Page 80 OS LAMP OSC OUTPUT OSC CTL *1.5V *1.5V PIN 2 *24V 24V PL 24 VOLT SELECT AND MON SUPPLY GENERATION FA628 PIN 1,3 DRIVERS FB217 *APPROXIMATE VOLTAGE TO LIGHT LAMP Issue 8 DEC 1995 234-151-013 PAGE 1 of 1 OSCILLATOR OUT-OF-SERVICE LAMP CIRCUIT...
Page 81 ISD-131 [3] Rotate ROS/OFF [1] See CAUTION 1, switch to NOTE 1, and [2] Is OSC OS counterclockwise TABLE A. Replace lamp lighted position (OFF NORM FB217 pack and OS lamps [DLP-500] extinguish) [7] Rotate ROS/OFF [4] See NOTE 1 and TABLE A. switch to Replace original [6] Is OSC OS...
Page 82 [1] See CAUTION 1 and [5] Measure +DC TABLE A. Measure +DC voltage between [4] Disconnect voltage between [2] Is voltage terminals A and B power connector positive voltage lead between +4.8V of power connector P18 from 39B and ground on terminal and +5.2V (positive probe on oscillator...
Page 83 TABLE B [6] Is voltage BINARY BITS MASTER between +4.8V CHAIN and +5.2V DC DC DC 0 DC DC DC 0 DC DC DC 1 DC DC 1 [7] Clear [8] Connect oscillator POWER INPUT oscillator 56 DUMP:NCLK 0, CREG plug P18 power problem CONVERT TO BINARY...
Page 84 [14] Connect oscillator manual adjustment unit to oscillator selected in Step 12, Page 2 [DLP-532] [15] At selected oscillator, translate LED display into corresponding thumbwheel setting [17] Does second of oscillator manual adjustment oscillator have unit and record value [Figure 2] Page 4 full frequency range capabilities...
Page 85 [18] Adjust oscillator manual adjustment unit thumbwheels to original frequency word recorded in Step 15, Page 3 [19] Load frequency word into second oscillator by depressing LOAD pushbutton [22] Call 4ESAC for [20] Disconnect oscillator manual adjustment assistance unit [DLP-531] [21] At second oscillator chain power switch, OFF NORM and OS rotate ROS/OFF switch to counterclockwise...
Page 86 [23] Disconnect oscillator manual adjustment unit [DLP-531] [24] At TTY, type RST:NCLK 0;OSC a! a = second oscillator Response: removed from service RST:NCLK 0 c = chain of requested CHAIN c COMPL oscillator [25] At TTY, type RST:NCLK 0;OSC b! b = first oscillator Response: removed from service...
Page 87 [1] See CAUTION 1. [2] Are multiple Page 3 Is any clock chain clock chains out-of-service out-of-service [4] See NOTE 1. At TTY, enter [3] Is Network [5] Does Network RST:SCLK O,NCSU O! Clock Sync Unit Clock Sync Unit Wait for copy soft out-of-service restore to hard BLM on SCLK O,...
Page 88 [7] At TTY, enter RMV:NCLK O,OSC a! a = chain having phase error [9] Does report indicate "oscillator update complete, Page 3 [8] At TTY, enter oscillator may be RST:NCLK O,OSC a! restored with chain" a = chain having phase [See NOTE 3] error See NOTE 2...
Page 89 TABLE B [12] At TTY, enter RMV:SCLK 0,NCSU 0! BINARY BITS MASTER [13] Disable all 39B oscillators CHAIN using the STROBE switch on each oscillator DC DC [14] See NOTE 4. Ensure chain [17] Is waveform with phase error between 1.7 and is out-of-service Page 9 2.1 volts peak-...
Page 90 [23] Is waveform between 1.8 and 2.2 volts peak- [24] Depress ROS/OFF switch for chain to-peak having phase error cleared (OFF NORM and PWR OFF lamps are lighted) [27] Repeat from Page 3, [25] Replace FB213 pack [TABLE A, Step 16 Page 3] [26] Depress and hold ON pushbutton for 2 seconds (PWR OFF lamp...
Page 91 [30] Enter RMV:NCLK 0,CHAIN a! a = master clock chain determined in Step 20, Page 3 [32] Is waveform between 1.8 and and 2.0 volts [33] Remove scope probe peak-to-peak [31] Connect channel 1 scope from pack probe to terminal 018 of FB214 pack [TABLE A, Page 3] [34] See NOTE 5, Page 4.
Page 92 [51] Remove level [49] Remove probe [40] Can adjustment cover from terminal 018 [52] Replace [50] Is waveform be and adjust of FB214 pack and level waveform 0.1V adjusted to 1.9 oscillator to connect it to adjustment or greater volts peak-to-peak measure 0.92V terminal 201 of cover...
Page 93 [66] Remove level [56] Remove probe adjustment cover [57] Is waveform from terminal 018 [60] Is [Figure 2, Page 5] between 0.87 of FB214 pack and waveform and adjust and 0.97 volts connect it to terminal present potentiometer to peak-to-peak 201 of FB687 pack measure 0.92V [TABLE A, Page 3]...
Page 94 [71] Ensure oscillator —24V power is present [DLP-521] [72] See CAUTION 3. Remove oscillator [DLP-537] [73] Install oscillator [DLP-519] [74] See CAUTION 4. Connect oscillator manual adjustment unit to oscillator [DLP-532] [75] Check full frequency range of oscillator [DLP-520] [76] Check 39B oscillator frequency hi/low bits [DLP-539] [82] Repeat...
Page 95 [83] Connect channel [84] Is waveform 2 scope probe to between 1.8 and TABLE D terminal 018 of Page 10 2.0 volts peak- FB214 pack at CLOCK RELAY RELAY to-peak TABLE A, Page 3, CHAIN LOCATION location 066-24 0PHR 066-47 1PHR 166-24 0PHR...
Page 96 [93] Remove level adjustment cover from 39B oscillator [Figure 2, Page 5] [92] Is waveform of chain being tested, between 1.4 and adjust potentiometer to 2.4 volts measure 1.9 volts peak- peak-to-peak to-peak, and replace level adjustment cover [94] Remove probe from terminal 018 Page 11 of FB214 pack and...
Page 97 [102] Remove probe from terminal 018 [97] Can [103] Is of FB214 pack and waveform be waveform 0.1V Page 13 connect it to adjusted to 1.9 or greater terminal 201 of volts peak-to-peak FB687 pack [TABLE A, Page 3] [104] Remove level [98] Remove probe adjustment cover, from terminal 018...
Page 98 [112] Remove oscillator level adjustment cover [114] Remove [113] Can [Figure 2, Page 5], probe from [107] Is waveform be adjust potentiometer terminal 201 waveform adjusted to 0.92V to measure 0.92V of FB687 pack present peak-to-peak peak-to-peak and and repeat from replace level Page 9 adjustment cover...
Page 99 [115] Ensure oscillator —24V power is present [DLP-521] [116] See CAUTION 5. Remove oscillator [DLP-537] [117] Install oscillator [DLP-519] [118] See CAUTION 6. Connect oscillator manual adjustment unit to oscillator [DLP-532] [119] Check full frequency range of oscillator [DLP-520] [120] Check 39B oscillator frequency hi/low bits [DLP-539] [124] Is...
Page 100 [129] Align 39B [127] Determine oscillator having [128] Is timing reference office timing phase error equipage cleared to external references port [DLP-528] equipped reference frequency [DLP-530] [130] Connect oscillator manual [133] Repeat from [132] Did adjustment unit to Step 131 changing channel 2 oscillator [DLP-532] thumbwheel setting...
Page 101 [137] Measure negative DC voltage [138] Is voltage between terminal 9 between —3.9 and Page 17 TABLE E of PHR relay [TABLE E] —4.1 volts CLOCK RELAY and frame ground RELAY CHAIN LOCATION 066-24 0PHR 066-47 1PHR [139] Remove FREQ 166-24 0PHR CONTROL INPUT...
Page 102 [142] See CAUTION 7. Remove oscillator [DLP-537] [143] Install oscillator [DLP-519] [144] See CAUTION 8. Connect oscillator manual adjustment unit to oscillator [DLP-532] [145] Check full frequency range of oscillator [DLP-520] [146] Check 39B oscillator frequency hi/low bits [DLP-539] [150] Is [147] Disconnect oscillator Page 19 manual update...
Page 103 [152] Remove channel 2 probe from FB214 pack [153] Remove channel 1 probe [162] Convert and record if connected oscillator LED binary [156] Is PHASE display to corresponding METER indication thumbwheel hexidecimal between —1 and [154] Remove cliplead setting of oscillator +1 divisions from PHR relay manual adjustment unit...
Page 104 [168] Check for [172] On FB214 pack open circuit between [TABLE A, Page 3], [164] Did terminal 205 of the measure DC voltage PHASE METER FB214 circuit pack between terminal 008 reading change and terminal 9 of and ground and by 2 divisions PHR relay (SD-4A036-01, terminal 208 and...
Page 105 [180] Enter [176] Do more RST:NCLK 0,CHAIN a! chains need a = chain that has had phase error phase error cleared cleared (Response: RST:NCLK 0 CHAIN a COMPL) [177] See NOTE 7. Enter [181] Enable all RST:NCLK 0,CHAIN a;UCL! 39B oscillators [179] Repeat a = chain having phase using the STROBE...
Page 106 [1] See CAUTION 1. [2] Clear phase Does PHASE METER error in chain on more than one with 2 or more chain indicate one divisions from zero division or more from -39B osc. [TAP-134] zero -DRO osc. [TAP-146] [4] Clear phase error on all four [3] Are PHASE chains starting...
Page 107 [5] Type DUMP:NCLK 0,CREG! [6] Convert to binary rightmost two octal digits of word 1 in response [Figure 1] [9] Was [10] Call restore complete TAC for [7] Using binary bits, response assistance determine master clock received chain [TABLE A] [8] See NOTE 1.
Page 108 NOTES [1] See CAUTIONS [2] Is diagnosed 1. It may be several minutes before TLP [3] See 1 and 2, and chain the only list is printed NOTE 1. Enter NOTE 1. chain out of 2. TLP list HELPER ID field lists clock chain message 2 Enter message 1 service (OS lamp...
Page 109 [12] Is suspect [22] Clear [16] Is this equipment with diagnostic failure chain being WT=8 and 9 listed using TLP pack list diagnosed more for one chain [TAP-102] DGN:NCLK 0 CHAIN 0 PH 4 (2,00000000 00000002) TEST MISMATCH SUPPLEMENTARY DATA 00000300 00106550 00010000 00402020 00001663 01000002 00000001...
Page 110 [1] See CAUTION 1. Ensure faulty chain is out of service [2] See CAUTION 2. [4] Is waveform Calibrate scope [5] Remove between 1.8 and [DLP-529] scope probe Page 2 2.0 volts from pack peak-to-peak [3] Connect scope probe to terminal 018 of FB214 pack [TABLE A] Page 3...
Page 111 [7] Replace [6] Has FB215 FB215 circuit pack circuit pack [DLP-500] been replaced [TABLE A, Page 1] [8] Enter [9] Was restore RST:NCLK 0,CHAIN a! complete message a = suspect faulty received chain [11] Contact next [10] Has FA628 higher level of circuit pack technical support been replaced...
Page 112 [19] Remove level adjustment cover from [13] Is waveform front left side of 39B [20] Replace between 1.4 and oscillator [Figure 1] of level 2.4 volts chain being tested and adjustment peak-to-peak adjust potentiometer cover to measure 1.9 volts peak-to-peak [14] Remove probe Page 4 from terminal...
Page 113 [30] Remove level [28] Remove probe [21] Can adjustment cover from terminal 018 [29] Is waveform be and adjust of FB214 and connect waveform 0.1V adjusted to 1.9 oscillator it to terminal 201 or greater volts peak-to-peak of FB687 pack to measure 0.92V peak-to-peak [TABLE A]...
Page 114 [42] Remove level adjustment cover [Figure 1, Page 3] [35] Is and adjust waveform potentiometer present to measure 0.92V peak-to-peak [36] Remove 39B oscillator [43] Replace output level connector P13 adjustment cover [37] Remove probe from terminal 201 of FB687 pack and [44] Can [45] Remove touch it to center...
Page 115 [47] Check oscillator —24V power [DLP-521] [48] See CAUTION 3. Remove oscillator [DLP-537] [49] Install oscillator [DLP-519] [50] See CAUTION 4. Connect oscillator manual adjustment unit to oscillator [DLP-532] [51] Check full frequency range of oscillator [DLP-520] [52] Check 39B oscillator frequency hi/low bits [DLP-539] [56] Is [58] Repeat...
Page 116 [3] See CAUTION 2. [1] See CAUTION 1. Remove and restore [4] Is restore Is TTY message complete response NCSU by entering REPT;NCSU 0: received RMV:SCLK 0,NCSU 0! FREERUN 10 MINUTES RST:SCLK 0,NCSU 0! printed out [5] See CAUTION 2. [2] Wait for Switch to alternate Step 1 TTY...
Page 117 [7] Check DS1 [6] Is restore sync reference complete response signal [DLP-550] received [8] Contact sync coordinator for assistance Issue 8 DEC 1995 234-151-013 PAGE 2 of 2 CLEAR REF STAT/FREE RUN LAMP LIGHTED, MCC SYSTEM ALARMS PANEL...
Page 118 [1] See CAUTION 1. [2] Was excessive [3] Was excessive Contact far-end slip indicated in slip indicated in 4 ESS switch MOC Page 4 far-end office for your office for having trunk group this trunk group other trunk groups with excessive slip...
Page 119 [9] Request far-end [7] Does far-end [12] Request far- office to diagnose [10] Was office have end office to DT or DIF associated far-end office excessive slips in clear DT or DIF with trunk group diagnostic ATP other trunk groups problem having slip problems [11] Request far-end...
Page 120 [15] Does either [18] Call office have DS1 [13] Was synchronization as regular diagnostic coordinator for timing reference assistance [DLP-528] [14] Clear [16] Using diagnostic failure TABLE A message, using TLP suspect diagnose DT or DIF pack list, NCSU containing DS1 [TAP-104] regular timing reference signal...
Page 121 [20] Switch NCSU reference signal to alternate reference by entering RMV:SCLK 0,NCSU 0! SW:SCLK 0:REF 1 ! RST:SCLK 0,NCSU 0! (REF STAT lamp lights) [23] Contact far- [22] Is office end 4ESS switch MOC experiencing [21] Monitor slips office having excessive slips in your office trunk groups with...
Page 122 [33] See NOTE 1, [29] Is the office Page 1. [27] Was [26] At TTY, enter equipped with Call synchronization diagnostic BSRF as regular DGN:SCLK 0,NCSU 0! coordinator for reference assistance [DLP-528] [28] Clear NCSU [30] Using diagnostic TABLE B message, failure [TAP-104] diagnose DT or DIF containing DS1 NCSU...
Page 123 [1] See CAUTION 1. Is replacement Page 2 39B oscillator available [2] See NOTE 1. At TTY, enter RMV:NCLK 0,OSC a! a = out-of-range oscillator [3] Wait 24 hours; then at TTY, enter RST:NCLK 0,OSC a! a = oscillator removed in Step 2 NOTE 1 Order should be placed for...
Page 124 [4] See CAUTION 2. Remove oscillator [DLP-537] [5] Install oscillator [DLP-519] [6] See CAUTION 3. Connect oscillator manual adjustment unit to oscillator [DLP-532] [7] Check full frequency range of oscillator [DLP-520] [8] Check 39B oscillator frequency hi/low bits [DLP-539] [9] Disconnect oscillator manual [13] Is adjustment unit [DLP-531] manual update...
Page 125 [1] At TTY, enter TABLE B DUMP:NCLK 0,CREG! BINARY BITS MASTER CHAIN [2] Convert to binary DC DC DC 0 rightmost two octal digits DC DC DC 0 of word 1 [Figure 1] DC DC DC 1 DC DC 1 [3] See NOTE 1.
Page 126 [6] Connect oscillator manual adjustment unit to oscillator selected in Step 4, Page 1 [DLP-532] [7] At selected oscillator, hex display corresponds to thumbwheel setting of [9] Does second oscillator manual adjustment oscillator have unit. Record value Page 3 full frequency range and alarm bit capabilities [8] Check full frequency range and alarm...
Page 127 [10] Adjust oscillator manual adjustment unit thumbwheels to original frequency word recorded in Step 7, Page 2 [11] Load frequency word into second oscillator by depressing LOAD pushbutton [14] Call 4ESAC for [12] Disconnect oscillator manual adjustment assistance unit [DLP-531] [13] At second oscillator chain power switch, OFF NORM and OS rotate ROS/OFF switch counterclockwise...
Page 128 [15] Disconnect oscillator manual adjustment unit [DLP-531] [16] At TTY, enter RST:NCLK 0,OSC a! a = second oscillator Response: removed from service RST:NCLK 0 c = chain of requested CHAIN c COMPL oscillator [17] At TTY, enter RST:NCLK 0,OSC b! b = first oscillator Response: removed from service...
Page 129 [1] See CAUTION 1. [2] Are multiple Page 3 Is any clock chain clock chains out-of-service out-of-service [4] See NOTE 1. At TTY, enter [3] Is Network [5] Does Network RST:SCLK O,NCSU O! Clock Sync Unit Clock Sync Unit Wait for copy soft out-of-service restore to hard BLM on SCLK O,...
Page 130 [7] At TTY, enter RMV:NCLK O,OSC a! a = chain having phase error [9] Does report indicate "oscillator update complete, Page 3 [8] At TTY, enter oscillator may be RST:NCLK O,OSC a! restored with chain" a = chain having phase [See NOTE 3] error See NOTE 2...
Page 131 TABLE B [12] At TTY, enter RMV:SCLK 0,NCSU 0! BINARY BITS MASTER [13] Disable all DRO oscillators CHAIN using the ENABLE/DISABLE switch on each oscillator DC DC [14] See NOTE 4. Ensure chain [17] Is waveform with phase error between 1.7 and is out-of-service Page 9 2.1 volts peak-...
Page 132 [23] Is waveform between 1.8 and 2.2 volts peak- [24] Depress ROS/OFF switch for chain to-peak having phase error cleared (OFF NORM and PWR OFF lamps light) [27] Repeat from Page 3, [25] Replace FB213 pack [TABLE A, Step 16 Page 3] [26] Depress and hold ON pushbutton for 2 seconds (PWR OFF lamp extinguishes)
Page 133 [30] Enter RMV:NCLK 0,CHAIN a! a = master clock chain determined in Step 20, Page 3 [32] Is waveform between 1.8 and and 2.0 volts [33] Remove scope probe peak-to-peak [31] Connect channel 1 scope from pack probe to terminal 018 of FB214 pack [TABLE A, Page 3] [34] See NOTE 5, Page 4.
Page 134 [49] Remove probe [51] Remove level [40] Can from terminal 018 adjustment cover [52] Replace [50] Is waveform be of FB214 pack and and adjust level waveform 0.1V adjusted to 1.9 connect it to oscillator to adjustment or greater volts peak-to-peak terminal 201 of measure 0.92V cover...
Page 135 [66] Remove level [56] Remove probe adjustment cover from terminal 018 [57] Is waveform [Figure 2, Page 5] [60] Is of FB214 pack and between 0.87 and adjust waveform connect it to terminal and 0.97 volts potentiometer present 201 of FB687 pack peak-to-peak to measure 0.92V [TABLE A, Page 3]...
Page 136 [71] Ensure oscillator —48V power is present [DLP-549] [72] See CAUTION 3. Remove DRO oscillator [DLP-545] [73] Install DRO oscillator [DLP-541] [74] See CAUTION 4. Connect oscillator manual adjustment unit to oscillator [DLP-532] [75] Allow DRO oscillator to initialize. During initialization: •...
Page 137 [82] Connect channel [83] Is waveform 2 scope probe to between 1.8 and TABLE D terminal 018 of Page 10 2.0 volts peak- FB214 pack at CLOCK RELAY RELAY to-peak TABLE A, Page 3, CHAIN LOCATION location 066-24 0PHR 066-47 1PHR 166-24 0PHR...
Page 138 [92] Remove level adjustment cover from DRO oscillator [Figure 2, [91] Is waveform Page 5] of chain being between 1.4 and tested adjust potentiometer 2.4 volts to measure 1.9 volts peak- peak-to-peak to-peak, and replace level adjustment cover [93] Remove probe from terminal 018 Page 11 of FB214 pack and...
Page 139 [101] Remove probe from terminal 018 [96] Can [102] Is of FB214 pack and waveform be waveform 0.1V Page 13 connect it to adjusted to 1.9 or greater terminal 201 of volts peak-to-peak FB687 pack [TABLE A, Page 3] [103] Remove level [97] Remove probe adjustment cover, from terminal 018...
Page 140 [111] Remove oscillator level adjustment cover [113] Remove [112] Can [Figure 2, Page 5], probe from [106] Is waveform be adjust potentiometer terminal 201 waveform adjusted to 0.92V to measure 0.92V of FB687 pack present peak-to-peak peak-to-peak and and repeat from replace level Page 9 adjustment cover...
Page 141 [114] Ensure oscillator —48V power is present [DLP-549] [115] See CAUTION 5. Remove DRO oscillator [DLP-545] [116] Install DRO oscillator [DLP-541] [117] See CAUTION 6. Connect oscillator manual adjustment unit to oscillator [DLP-532] [118] Allow DRO oscillator to initialize. During initialization: •...
Page 142 [127] Align DRO [125] Determine oscillator having [126] Is timing reference office timing phase error equipage cleared to external references port [DLP-528] reference frequency equipped [DLP-544] [128] Connect oscillator manual [131] Repeat from [130] Did adjustment unit to Step 129 changing channel 2 oscillator [DLP-532] thumbwheel setting...
Page 143 [135] Measure negative DC voltage [136] Is voltage between terminal 9 between —3.9 and Page 17 TABLE E of PHR relay [TABLE E] —4.1 volts CLOCK RELAY and frame ground RELAY CHAIN LOCATION 066-24 0PHR 066-47 1PHR [137] Remove FREQ 166-24 0PHR CONTROL INPUT...
Page 144 [140] See CAUTION 7. Remove DRO oscillator [DLP-545] [141] Install DRO oscillator [DLP-541] [142] See CAUTION 8. Connect oscillator manual adjustment unit to oscillator [DLP-532] [143] Allow DRO oscillator to initialize. During initialization: • FREE RUN LED flashes • MAJOR alarm LED is lighted •...
Page 145 [149] Remove channel 2 probe from FB214 pack [150] Remove channel 1 probe [159] Record oscillator if connected hex display and adjust [153] Is PHASE thumbwheel hexidecimal METER indication setting on oscillator between —1 and [151] Remove cliplead manual adjustment unit +1 divisions from PHR relay to same value...
Page 146 [165] Check for [169] On FB214 pack open circuit between [TABLE A, Page 3], [161] Did terminal 205 of the measure DC voltage PHASE METER FB214 circuit pack between terminal 008 reading change and terminal 9 of and ground and by 2 divisions PHR relay (SD-4A036-01, terminal 208 and...
Page 147 [177] Enter [173] Do more RST:NCLK 0,CHAIN a! chains need a = chain that has had phase error phase error cleared cleared (Response: RST:NCLK 0 CHAIN a COMPL) [174] See NOTE 7. Enter [178] Enable all RST:NCLK 0,CHAIN a;UCL! DRO oscillators [176] Repeat a = chain having phase using the ENABLE/...
Page 148 [1] See CAUTION 1. Ensure faulty chain is out of service [2] See CAUTION 2. [4] Is waveform Calibrate scope [5] Remove between 1.8 and [DLP-529] scope probe Page 2 2.0 volts from pack peak-to-peak [3] Connect scope probe to terminal 018 of FB214 pack [TABLE A] Page 3...
Page 149 [7] Replace FB215 [6] Has FB215 circuit pack circuit pack [DLP-500] been replaced [TABLE A, Page 1] [8] Enter [9] Was restore RST:NCLK 0,CHAIN a! complete message a=suspect faulty received chain [11] Contact next [10] Has FA628 higher level of circuit pack technical support been replaced...
Page 150 [19] Remove level adjustment cover from [13] Is waveform front side of DRO [20] Replace between 1.4 and oscillator [Figure 1] of level 2.4 volts chain being tested and adjustment peak-to-peak adjust potentiometer cover to measure 1.9 volts peak-to-peak [14] Remove probe Page 4 from terminal 018 of FB214 and...
Page 151 [30] Remove level [28] Remove probe [21] Can adjustment cover from terminal 018 [29] Is waveform be and adjust of FB214 and connect waveform 0.1V adjusted to 1.9 it to terminal 201 oscillator or greater volts peak-to-peak to measure 0.92V of FB687 pack peak-to-peak [TABLE A]...
Page 152 [42] Remove level adjustment cover [35] Is [Figure 1, Page 3] and waveform adjust potentiometer present to measure 0.92V peak-to-peak [36] Remove DRO oscillator RF OUTPUT [43] Replace connector P13 level adjustment cover [37] Remove probe from terminal 201 of FB687 pack and [44] Can [45] Remove waveform be...
Page 153 [47] Ensure oscillator —48V power is present [DLP-549] [48] See CAUTION 3. Remove DRO oscillator [DLP-545] [49] Install DRO oscillator [DLP-541] [50] See CAUTION 4. Connect oscillator manual adjustment unit to oscillator [DLP-532] [51] Allow DRO oscillator to initialize. During initialization: •...
Page 154 TABLE A [1] See CAUTION 1. FUSE LOCATION At TTY, enter CLOCK OSCILLATOR SD-4A014-02 CHAIN LOCATION FUSES RMV:NCLK 0,OSC a! a = out-of-range oscillator 033-21 033-56 [2] See TABLE A. Momentarily 133-21 remove —48V fuse associated 133-56 with out-of-range oscillator and then reinstall [3] Allow DRO oscillator to initialize.
Page 155 [10] See CAUTION 2. Remove DR0 oscillator [DLP-545] [11] Install DRO oscillator [DLP-541] [12] See CAUTION 3. Connect oscillator manual adjustment unit to oscillator [DLP-532] [13] Allow DRO oscillator to initialize. During initialization: • FREE RUN LED flashes • MAJOR alarm LED is lighted •...
Page 156 P/O FUSE PANEL +3V CONVERTER J4A004AE 023-14 J87598A NETWORK CLOCK FS 7 POWER SWITCH +24V +24V OTDSO CHAIN 0 066-03 FS 5 +24V -3V CONVERTER OBOA +24VA +24V TO DC POWER 018-14 FILTER UNIT 24V J87407B DISTRIBUTION +24VB J1A053AG +24V +24V FS 7 0TDS1...
Page 157 P/O FUSE PANEL J4A004AE NETWORK CLOCK POWER SWITCH +24V0 CHAIN 2 166-03 FS 6 DRO OSCILLATOR DRO OSCILLATOR +24VS0 133-21 133-56 -48VA -48VB 1TDSO NETWORK CLOCK FS 1 FS 1 POWER SWITCH +24V1 CHAIN 3 +24V 1BOA +3V CONVERTER -3V CONVERTER 166-68 FS 6 1-23-14...
Page 158 [1] See CAUTION 1. Obtain volt/ohmmeter (KS-14510) [2] At appropriate power switch, ensure [7] Using ohmmeter, ROS/OFF switch is rotated measure resistance to ROS (OS and OFF NORM [4] Is between pin 3 of lamps lighted) clock chain switch [Figure 2] cover removed and positive (+) terminal of coil...
Page 159 [10] Operate PLS switch [12] Is [13] Replace resistance PLS switch and [11] Using ohmmeter, measure less than repeat from resistance between pin 3 of 1 ohm Step 7, Page 1 switch [Figure 2, Page 1] and negative (—) terminal of coil [Figure 3, Page 1] [14] At front of frame, install network clock chain control...
Page 160 OFF NORM and [1] See NOTES 1 and 2. Rotate OS lamps ROS/OFF switch applicable light to ROS [TABLE A, Page 2] NOTES 1. Packs at locations [2] If circuit pack being replaced is 66-31,-33,-34,-37, in NCSU, position each oscillator -39, and -40 are ENABLE/DISABLE switch to DISABLE Power...
Page 161 TABLE B TABLE A CIRCUIT PACK FUSES CIRCUIT PACK POWER CONTROLS REQUIRED TO REMOVE CIRCUIT PACK REQUIRED TO REMOVE CIRCUIT PACK PACK PACK LOCATION FUSE LOCATION POWER CONTROL FUSE CONTROL BAY 0/BAY 1 BAY 0/BAY 1 LOCATION BAY 0 BAY 1 LOCATION BAY 0 BAY 1...
Page 162 [11] Verify oscillator signal [9] Is [8] Was level - DRO oscillator being FB687 pack oscillator used used in frame replaced [DLP-547] 39B oscillator [10] Verify oscillator signal level - 39B oscillator used [DLP-540] [12] Replace removed fuse PWR OFF [15] If unit goes and/or depress and [14] Did procedure...
Page 163 Figure 1 — FG63 Switch Positions Figure 2 — FG73 Switch Positions Issue 8 DEC 1995 234-151-013 REPLACE CIRCUIT PACK (EXCEPT FB211 TYPE) PAGE 4 of 4...
Page 164 [1] On raw data printout for first failing test, locate last data word printed [Figure 1, Page 2] In first failing phase PIDENT: [2] Use last data word address to locate where first subroutine was called [3] Read any comments at CALLSUB statement located [4] Note name of subroutine called in CALLSUB statement label item...
Page 165 NUMBER OF SUPPLEMENTARY DATA WORDS ADDRESS OF THAT PRECEDE DOLOOP DATA WORDS FAILING TEST IN LAST SUB- NUMBER OF DOLOOP DATA WORDS THAT ROUTINE CALLED PRECEDE SUBROUTINE DATA WORDS DGN: SCLK 0 CONTR 0 PH 2 STF-BOF (16,00000000 00000000) NUMBER OF SUBROUTINES CALLED THAT BOUND THE FAILING TEST TEST MISMATCH...
Page 166 [10] See NOTE 1. Have all subroutines been located [11] On raw data printout, locate next preceding subroutine data [13] Repeat word [Figure 1, Page 2] from Step 3, Page 1 In subroutine located in Step 8, Page 1: [12] Use subroutine data word address to locate where next subroutine was called NOTE 1...
Page 167 Read several DIAL statements just before failing test to determine what was occurring prior to test failing NOTE: Section 234-180-020 contains a description of DIAL statements Read failing test DIAL statement and any comments Note "asterisk data" that follows failing test number in listing Note relationship of asterisk line data to first five raw data printout words that follow mismatch...
Page 168 TABLE A DESCRIPTION OF DATA CONTAINED IN SECOND AND THIRD DATA WORD FOR EACH TYPE DIAL TEST STATEMENT DIAL TEST DIAL TEST DESCRIPTION* DESCRIPTION* STATEMENT STATEMENT CCBB A = B = 0, C = buffer bus address SCANI A(bits 11-2) = SP K code B = SP OP code to read scan points 0(1540) CITOP Standard PUB format†...
Page 169 TABLE B LOCATION OF INFORMATION SECOND AND/OR THIRD DATA WORD NETWORK CLOCK SYSTEM CLOCK OPAD/OPCODE CD4A036-01 CD4A037-01/02 (TABLES H and I) (TABLES A and B) SD point address VER:SPMTXPK:SDP,MDN 0’a! a = SD point address Scan point address VER:SPMTXPK:SCP,MSN 0’a! a = scan point address Issue 8 DEC 1995...
Page 170 At frame power switch: OFF NORM and [1] Rotate ROS/OFF switch OS lamps light clockwise to ROS [6] Replace defective [3] See TABLE A, unit (circuit Page 2. Are LEDs pack [DLP-500] or on converters and converter [DLP-509]) circuit packs and return to Step 1 lighted [2] Depress and hold TEST...
Page 171 TABLE A LED LOCATIONS UNIT CONTAINING LED NCLK UNIT LOCATION SCLK UNIT LOCATION PUB UNIT LOCATION NCSU LOCATION Circuit pack FB152 078-03, 178-03 056-52, 156-52 — — 078-68, 178-68 Circuit pack FG76 — — — 050-27† +3V converters 023-14, 123-14 018-50, 118-50 060-52, 160-52 —...
Page 172 SUMMARY meaning for each doloop [Figure 1, Page 2]. If endloop Locate failing test in last subroutine called. Look past statement was not found in subroutine, go where failing test for endloop statements. For each endloop subroutine was called and look for endloop statements after statement located in subroutine, use endloop label CALLSUB statement.
Page 173 M52 DGN: SCLK 0 CONTR 0 PH 2 STF-BOF (13,00000000 00000000) MSG STARTED EXPR ADDRESS IN NUMBER OF DOLOOPS THAT BOUND FAILING TEST LAST SUB. CALLED NUMBER OF SUBROUTINES CALLED TEST MISMATCH SUPPLEMENTARY DATA 28360 02000000 75777757 00000000 01000240 00000053 0320002 DOLOOP INDEX SUBROUTINE...
Page 174 [8] Locate referenced endloop statement closest to (but beyond) EXPR data noted in Step 2, Page 1 [10] Does doloop [11] Go to statement precede [9] Locate doloop statement Step 15 location of EXPR using label (in parentheses) data at endloop statement [14] Have number [12] Read any comments at of doloops indicated...
Page 175 [18] In subroutine that called last subroutine checked for doloops, locate CALLSUB statement that called subroutine [19] Note page and line number of CALLSUB statement [23] Are any [22] Is endloop references endloop MACRO between CALLSUB Page 5 [20] Locate last address in referenced statement and end this subroutine and note...
Page 176 [26] Locate referenced endloop statement closest to (but beyond) CALLSUB statement noted in Step 19, Page 4 [28] Does doloop [29] Go to statement precede [27] Locate doloop statement Step 33 location of using label (in parentheses) CALLSUB statement at endloop statement [32] Have number [30] Read any comments at of doloops indicated...
Page 177 In first failing phase PIDENT: [37] Locate CALLSUB statement that called for last subroutine checked for doloops [Figure 1, Page 2] [38] Note page and line number of CALLSUB statement [39] Locate endloop MACRO in PIDENT reference section [47] Locate endloop [43] Does doloop statement next statement precede...
Page 178 In first failing phase PIDENT: [1] Locate first failing test using EXPR address on raw data printout [Figure 1, Page 2] [2] Note page and line number of EXPR data [3] Locate endloop MACRO in PIDENT reference section [11] Locate endloop [7] Does doloop statement next statement precede...
Page 179 DGN: SCLK 0, CONTR 0 STF-BOF (13,00000000 000000000) MSG STARTED ADDRESS OF SUPPLEMENTARY DATA WORD FAILING TEST EXPR DATA NUMBER OF DOLOOPS THAT BOUND FAILING TEST TEST MISMATCH SUPPLEMENTARY DATA 28360 0200000 75777757 00000000 01000240 00002147 13000002 DOLOOP INDEX VALUES WHEN TEST FAILED 00100000 00000004...
Page 180 SUMMARY Open cover door and depress LOCAL/REMOTE pushbutton, then mount reel. Thread tape and turn take-up reel two or three turns and release brake. Depress ARMS NORMAL pushbutton, then FORWARD pushbutton; obtain 25 IPS and REMOTE conditions and close door At tape transport: [1] Open interlocked cover door;...
Page 181 [6] Depress and hold BRAKE RELEASE pushbutton [7] See WARNING 1. Manually unwind about 5 feet NOTES of tape, then release 1. To start tape on BRAKE RELEASE pushbutton take-up reel, it may help to moisten the tape [8] See WARNING 2. Thread end (moistened tape through tape path indicated fingers) and...
Page 182 25 IPS lamp [14] Depress 5 IPS/25 IPS pushbutton to lights obtain 25 IPS lighted condition REMOTE lamp [15] Depress LOCAL/REMOTE pushbutton to lights obtain REMOTE lighted condition [16] See WARNING 4. Close door WARNING 4 Closing tape transport door in harsh manner may upset alignment...
Page 183 SUMMARY failing test is not in automatic segment. If no segment Locate FIRST segment statement BEFORE first failing test. statement is found before first failing test, failing test If segment statement has AUTO (ON) indicated, failing test is in automatic segment is in automatic segment.
Page 184 In subroutine where first failing test is located: [10] Locate and note page and line number of first address in subroutine (000000) [11] Locate and note page and line number of [15] Was this [13] Is first failing test subroutine called Phase segment EXPR data...
Page 185 In subroutine that called [26] Locate last subroutine checked subroutine that for segment statement: called last [20] Locate and note page subroutine and and line number of repeat from Step 20 first address in subroutine (000000) Subroutine [21] Locate and note page and line number of [25] Was this [23] Is...
Page 186 In first failing phase PIDENT: [31] Locate and note page and line number of CALLSUB statement that called last subroutine checked for segment statement [37] Failing [33] Is test is in segment MACRO automatic referenced [32] Locate reference segment section [34] Are any segment references before CALLSUB...
Page 187 1. Locate segment statement that determined failing TABLE A test was not in automatic segment EX:NCLK 0;RPT 2:PH a,ADR b-c! EX:SCLK 0;RPT 2:PH a,ADR b-c! 2. Note segment statement index word address for a = first failing phase b = loop start address (Step 2) later use (loop start address) c = loop end address (Step 4) 3.
Page 188 [1] Rotate ROS/OFF switch for OFF NORM and OS NOTE 1 applicable converter lamps light Fuses should always be replaced as [TABLE A, Page 2] to ROS quickly as possible to prevent oscillator from cooling down. If converter LED [2] If circuit pack to be replaced is lights or blown fuse remains removed for in NCSU, position each oscillator longer than 5 minutes, allow 24 hours...
Page 189 TABLE A TABLE B CONVERTER POWER CONTROLS CONVERTER FUSES REQUIRED TO REMOVE CONVERTER REQUIRED TO REMOVE CONVERTER CONVERTER CONVERTER POWER SWITCH FUSE SWITCH FUSE LOCATION LOCATION LOCATION LOCATION BAY 0 BAY 1 BAY 0 BAY 1 60-52 60-55 12-22, 19-31 07-20 IPUB 0 IPUB 1...
Page 190 OK DMT [1] See WARNING 1. Enter lamp lights CLR:ADSFUNC TLP! [2] Open interlocked cover door. Ready to At upper right, pull demount tape interlock switch plunger outward [3] Depress LOCAL/REMOTE pushbutton to obtain LOCAL lighted condition Tension arms retract [4] Depress ARMS UNLOAD pushbutton [5] Depress and hold BRAKE RELEASE pushbutton...
Page 191 [1] See CAUTION 1. If unit receiving clock [6] Identify VIF, [4] Is TSI unit type signals from faulty [2] Is TSI DT, DIF, PUC or EST identified in Step 1 FB211 packs has not been unit associated unit associated with a near term (J4A001A-2) determined, use TABLE A, with the faulty...
Page 192 [11] Clean and lubricate replacement pack terminals and connector per approved procedures [12] Insert and ensure proper seating of replacement pack [13] Install fuses removed in Step 9, Page 1 [14] Restore units removed from service in Steps 3, 5, or 7, Page 1, using appropriate TABLE E, Page 6, messages Issue 8 DEC 1995...
Page 193 TABLE A FB211 PACK/FUSE/USER ASSIGNMENT FOR OFFICES NOT EQUIPPED WITH CRTSI FRAMES FB211 FB211 FB211 FB211 FB211 FUSE FUSE FUSE FUSE FUSE PACK USER PACK USER PACK USER PACK USER PACK USER DESIG DESIG DESIG DESIG DESIG 74-04 TSI 08 74-19 TSI 22 74-54...
Page 194 TABLE B FB211 PACK/FUSE/USER ASSIGNMENT FOR OFFICES EQUIPPED WITH MIXED TSI TYPES (CRTSI AND OTHER TYPES) FB211 FB211 FB211 FB211 FB211 FUSE USER FUSE USER FUSE USER FUSE USER FUSE USER PACK PACK PACK PACK PACK DESIG OR EQL* DESIG OR EQL* DESIG OR EQL*...
Page 195 TABLE C FB211 PACK/FUSE/USER ASSIGNMENT FOR OFFICES EQUIPPED WITH CRTSIs ONLY FB211 FB211 FB211 FB211 FB211 FUSE FUSE FUSE FUSE FUSE PACK PACK PACK PACK PACK USER* USER USER* USER* USER* DESIG DESIG DESIG DESIG DESIG 74-04 TSI 16,17 74-19 TSI 44,45 74-54 78-21...
Page 196 TABLE D REMOVE MESSAGES FRAME TYPES TMSP OR SCLK TSI-2 (SD-4A011-02) TSIB (SD-4A083-01) RMV:TMSP a,CONTR b! RMV:VIF a,CONTR b! RMV:VIF a,CONTR b! RMV:SCLK a,CONTR c! RMV:DT a,CONTR b! RMV:DT a,CONTR b! RMV:DIF a,CONTR b! RMV:DIF a,CONTR b! RMV:PUC a,CONTR b! RMV:PUC a,CONTR b! RMV:EST a,CONTR b! RMV:EST a,CONTR b!
Page 197 [1] Enter RMV:NCLK O,CHAIN a! (a = chain to be adjusted) [2] On 39B oscillator, position STROBE switch to DISABLE [3] Connect oscillator manual adjustment unit, ED4A178, to J20 of 39B oscillator to be adjusted Page 2 [4] Ensure oscillator manual adjustment unit power LED lights [5] On 39B oscillator, position STROBE switch to ENABLE...
Page 198 [8] At oscillator manual adjustment unit, decrease frequency word by adjusting No FREQ LED lights thumbwheels in single [7] Is Page 3 hundred steps until FREQ HI condition of LED lights; depress LOAD the FREQ LEDs pushbutton after each step [9] At oscillator manual [Figure 1] decrease [Figure 1]...
Page 199 [16] Increase frequency word by setting hundreds-digit FREQ HI thumbwheel up one digit LED goes off and depress LOAD pushbutton [17] Decrease tens-digit thumbwheel until FREQ HI LED lights; FREQ HI depress LOAD pushbutton LED lights after each step decrease [18] Increase frequency word by setting tens-digit thumbwheel FREQ HI...
Page 200 [22] Decrease frequency word by setting tens-digit thumbwheel back one digit; FREQ LOW depress LOAD pushbutton LED goes off after each step decrease [23] Increase frequency word by increasing units digit thumbwheel until FREQ LOW LED lights; depress FREQ LOW LOAD pushbutton after each LED lights step increase...
Page 201 [27] Disconnect oscillator manual adjustment unit connector from J20 of 39B oscillator [28] Connect NCSU cable to J20 of 39B oscillator [29] On 39B oscillator, position STROBE switch to ENABLE [30] At TTY, enter RST:NCLK O,CHAIN a! (a = chain adjusted) Issue 8 DEC 1995 ADJUST 39B OSCILLATOR FREQUENCY USING OSCILLATOR MANUAL...
Page 202 [1] At network clock frame, observe [3] Repeat [2] Does PHASE LOCK OVEN TEMP from Step 1 meter indicate meter (chain 0, 1, 2 divisions for all 2, or 3) chains or more TAP-129 Issue 8 DEC 1995 234-151-013 PAGE 1 of 1 CHECK PHASE LOCK OVEN TEMP METER...
Page 203 [1] At network [2] Does MSO lamp clock frame, light and do PHASE [3] Release depress and hold METER and PHASE MSO switch MSO switch (chain LOCK OVEN TEMP meter 0, 1, 2, or 3) reset arms operate [4] Do meter TAP-127 reset arms Page 2...
Page 204 OFF NORM and [6] Rotate ROS/OFF switch for OS lamps light chain under test PWR OFF [7] Depress ROS/OFF lamp lights switch [10] Repeat from Step 1 for all chains [8] Replace meter for chain under test [DLP-516] OFF NORM and OS lamps [9] Rotate ROS/OFF switch go off...
Page 205 [1] Obtain tools and parts [TABLE A] [2] At appropriate switch location [TABLE B], depress ROS/OFF switch to remove power [3] At rear of frame, remove six panhead screws holding rear of NCLK chain control cover [Figure 1] Leads tagged [4] At front of frame, remove four flathead screws and and removed NCLK control cover [Figure 1]...
Page 206 [8] Push four (two top and bottom) locking tabs toward body of defective switch/lamp assembly socket mount and push defective switch/lamp assembly out front of mounting bracket [9] Install new switch/lamp assembly in mounting bracket [10] Cut and strip leads to be connected by wire wrap [15] Depress [11] Wire wrap leads to new switch/lamp...
Page 207 (REAR) CONTROL COVER (FRONT) FLATHEAD SCREWS (6 PANHEAD) SCREWS (4) [1] Obtain tools and parts [TABLE A] MOUNTING BRACKET SCREWS (4) [2] Ensure OS lamp lights and power is removed from chain containing meter to be replaced [3] Remove fuse associated with meter Figure 1 —...
Page 208 [10] Holding new meter in place, install and tighten four meter mounting TABLE B screws [Figure 2, Page 1] CLOCK METER FUSE LOCATION CHAIN [11] Solder leads to their 009-32 PHASE corresponding positions on new 007-45 OVEN meter using grounded-tip soldering iron, and remove tags 009-39 PHASE...
Page 209 [1] See NOTE 1. On [4] On clock chain clock chain power switch, power switch, rotate [2] On clock rotate ROS/OFF switch to ROS/OFF switch chain control ROS (OFF NORM lamp counterclockwise to panel, does OSC lights, ACK lamp lights normal position (OS OS lamp light momentarily, OS lamp...
Page 210 [2] Call U.S. [1] See CAUTION 1. Bureau of Has call been Standards, established to 303-499-7111, for U.S. Bureau of time announcements Standards [3] Enter local mode partial message SET:CLK:TIME aa aa = hour of night [4] Return cursor to start of message [8] Is system clock time printed greater than plus or minus...
Page 211 TABLE A CLOCK POWER SWITCH CHAIN FRAME LOCATION [1] Is mate [4] At TTY, enter clock chain RST:NCLK 0,CHAIN a! 066-03 in service a = out-of-service 066-68 mate chain 166-03 166-68 [2] At power [9] Analyze F-Level switch, rotate interrupt using [5] Did mate [8] Is ROS/OFF switch...
Page 212 [10] Remove screws holding oscillator to oscillator mounting plate and retain rubber washers [11] Align rubber washers with screw OSCILLATORS holes on bottom of new oscillator [12] Place oscillator mounting plate on bottom of new oscillator [13] Install and tighten screws with star washers to hold oscillator to oscillator mounting plate [16] Connect ground strap from...
Page 213 [23] See NOTE 1. At TTY, enter [21] Is failed RST:NCLK O,CHAIN a;UCL! diagnostic a = out-of-service phase mate chain 1, 2, or 3 [22] Isolate [25] Repeat [24] Did suspect clock from Step 5 mate chain chain, diagnostic restore failure [TAP-136] [26] Contact next higher level of...
Page 214 [1] Using thumbwheels on oscillator TABLE A manual adjustment unit, OMAU CORRESPONDING OSCILLATOR LED DISPLAY (1 set in first frequency FREQUENCY WORD word listed [TABLE A] OSCILLATOR LEDS THUMBWHEEL POS. 13 12 11 10 9 [2] Depress LOAD pushbutton on oscillator manual OMAU VERIFY adjustment...
Page 215 [4] If LEDs do not correspond to expected display, record oscillator LED display [5] Have all [7] Does frequency words oscillator have in TABLE A, Page 1, full frequency been checked range problem [6] Using thumbwheels [8] Has a second on oscillator manual oscillator passed adjustment unit, set...
Page 216 TABLE A [1] On back of fuse [3] Clear panel, measure —DC +24V FUSE CLOCK —24V CONVERTER [2] Is voltage power problem voltage between output CHAIN LOCATION DESIGNATION LOCATION between —22 [SD-4A014-02] terminal 2 of —24V and —26 volts 012-22 007-20 OBOA converter and frame...
Page 217 [1] At power switch, [3] Do all [2] Depress TEST ensure ROS/OFF lamps light pushbutton switch is rotated (disregard momentarily and counterclockwise to LEDs) observe lamps normal position [5] Check power switch [TAD-101] [SD-4A014] [4] Replace defective lamps using GE387 or equivalent Issue 7 SEP 1996...
Page 218 OS and OFF NORM [1] See NOTE 1. At power switch, lamps light rotate ROS/OFF switch to ROS PWR OFF lamp lights [2] Depress ROS/OFF switch Defective switch removed [3] Remove power switch fuses [TABLE A, Page 2] [4] Cover apparatus below switch with drop cloth [5] See NOTE 2.
Page 219 TABLE A FUSES UNIT UNIT SWITCH LOCATION DESIGNATION LOCATION FUSE BLOCK FUSE LOCATION DESIG 0ST0 066-04 007-20 Network clock 0ST1 unit 066-68 007-51 Peripheral 0BB2 060-55 009-51 bus unit System clock and bus 0ST2 056-66 009-51 controller unit 1ST0 166-04 107-20 Network clock...
Page 220 1. Enter RMV:SCLK 0,NCSU 0! DATA:SCLK CRITICAL REGISTERS NOTE: Bit 12 of word A indicates controller status. If 0, use word C in CONTR 0. If 1, use word C in CONTR 1 CONTR 0 2. Identify oscillator using bits 0, 1, and 2 of word C and TABLE A [Figure 1] 3.
Page 221 [1] See NOTE 1. At TTY, enter RST:NCLK 0,CHAIN a;UCL! TABLE A (a = chain removed from CLOCK POWER SWITCH service) CHAIN FRAME LOCATION 066-03 [2] On all in-service 39B oscillators, 066-68 set STROBE switch to ENABLE 166-03 166-68 [3] At TTY, enter RST:SCLK 0,NCSU 0! [4] Allow oscillator to stabilize and warm up at least 24 hours, preferably 48 hours...
Page 222 On Summary Data Printout [Figure 1]: In SD and FS Indicated: 1. Note monitor point address on first CD line under 10. Locate symbol number having same symbol name as V1 column indicated in Test Access PK for failing bit 2.
Page 223 [1] Obtain scope and TABLE A TABLE B allow it to warm up CLOCK CLOCK FB214 PACK LOCATION CHAIN RELAY CHAIN LOCATION [2] Enter RMV:NCLK 0,CHAIN a! a = chain to be adjusted 066-24 066-33 0PHR 066-47 066-39 1PHR [3] At rear of clock chain, connect 166-24 166-33 0PHR...
Page 224 [11] Record LED display (on or off condition) on front of oscillator [12] Record thumbwheel reading [14] Is oscillator at oscillator manual LED display adjustment unit Page 3 same as noted in Step 11 [13] Disconnect oscillator manual adjustment unit from oscillator [DLP-531] [15] Reconnect oscillator...
Page 225 [18] Recheck 39B oscillator level by connecting scope probe to terminal 018 of FB214 pack associated with clock chain removed from service [TABLE B, Page 1] [21] Remove all LEVEL [19] Is waveform clipleads and ADJUSTMENT between 1.8 volts probes used and 2.0 volts during this peak-to-peak...
Page 226 1. Ensure chain containing oscillator to be adjusted is removed from service TABLE A WORD 13 2. At TTY, enter BITS OFFICE TYPE PORT VER:UTYPE:SCLK 0! EQUIPAGE CODES 21 20 19 18 17 BSRF UNEQ 3. Using octal word 13 of UTMN translator data, DS1A UNEQ determine timing reference port equipage DS1B UNEQ...
Page 227 [1] Warm up three (150 MHz or higher) oscilloscopes (1-hour warmup UNDER COMPENSATED OVER COMPENSATED CORRECTLY COMPENSATED preferred) [2] See NOTE 1. Obtain at least two good 6-foot, 12.5pf, Scope X10 probes with 4-inch or selected less ground leads [3] Select one oscilloscope FIG.
Page 228 [12] Ensure volts/division switch is set to 0.5 TOO LITTLE GAIN TOO MUCH GAIN CORRECT GAIN volts/division [13] Use a small screwdriver to adjust channel 1 vertical gain to display amplitude of calibration source (if source amplitude is 1 volt, adjust for 2 divisions [FIG.
Page 229 [20] See NOTE 2. Do amplitudes of both scopes agree [25] Note amplitude of each scope [26] Remove probe from second scope and connect to channel 1 of third scope [21] Select one scope to use Page 4 [27] Repeat Steps 4 through 13 for third scope using calibration [22] Remove probe from scope not source selected in Step 15...
Page 230 [33] Calibrate channel 1 [30] Note amplitude and channel 2 with probes and select scope to be used by repeating [31] Was first that disagrees Steps 4 through 13 for or third scope least with each channel using selected other two scopes calibration source chosen in Step 15 [32] Calibrate channel 2...
Page 231 [2] At NCSU 1A power switch, [1] Is BSRF rotate ROS/OFF to the regular Page 2 ROS (OS and OFF NORM timing reference lamps light) and [DLP-528] depress (PWR OFF lamp lights) [4] At rear of [8] SYNC channel 1 [3] Ensure NCSU, connect [5] Is 2.048 MHz...
Page 232 [9] Ensure NCSU circuit packs listed TABLE B in TABLE B are installed TABLE C PACK LOCATION 65-100T 65-102T 65-103T 050-65 FG64 [10] Remove NCSU circuit packs 65-106T 65-117B 65-019B 050-67 located at 050-63 and 050-59 FG65 (FG61 and FG62) 050-25 FG72 050-27...
Page 233 [20] Connect channel 2 scope probe to terminal 018 of FB214 pack [TABLE D] [21] At scope, set CRT display to CHOP mode [26] Repeat from [25] Is [22] Set horizontal controls for Step 24 changing channel 2 5 ns/div [Figure 1] thumbwheel settings waveform to cause waveform...
Page 234 [27] See NOTE 4. Make additional adjustments until channel 2 waveform moves less than 30 ns in 5 minutes [Figure 2] [28] Record LEDs display (on/off conditions) at front of oscillator Page 5 [29] Record thumbwheel reading at oscillator manual adjustment unit [30] Disconnect oscillator manual adjustment unit from oscillator...
Page 235 [35] Remove [31] Is oscillator all clipleads LED display and probes used same as noted during this in Step 29, Page 4 procedure [34] Call 4ESAC for assistance [36] Is BSRF the regular timing [32] Reconnect reference (from oscillator Step 1, Page 1) manual adjustment unit [DLP-532]...
Page 236 1. On oscillator, position ENABLE/DISABLE switch to DISABLE 2. Disconnect oscillator manual adjustment unit connector from J20 of oscillator 3. Connect NCSU cable J20 to oscillator 4. On oscillator, position ENABLE/DISABLE switch to ENABLE End of procedure Issue 8 DEC 1995 234-151-013 DISCONNECT OSCILLATOR MANUAL ADJUSTMENT UNIT FROM OSCILLATOR PAGE 1 of 1...
Page 237 [1] Ensure clock chain is OOS and OS and OFF NORM ROS/OFF switch is in ROS lamps lighted position [2] On oscillator, position ENABLE/DISABLE switch to DISABLE [8] At [6] Is VERIFY [3] Disconnect D/A INPUT/OUTPUT oscillator, LED off and connector at J20 position FREQ HI and...
Page 238 [1] At MCC [3] Switch of NCSU [2] Does resultant system alarms message indicate reference was not panel, depress "status is normal" performed because REF STAT/FREE or "alternate is reference not RUN pushbutton active" available [4] Send messages RMV:SCLK 0,NCSU 0! SW:SCLK0,REF a! a = 0 if "alternate is active"...
Page 239 SUMMARY F-level interrupt occurs if open diode exists in FB211 Remove and replace, one at a time, FB211 circuit pack fuses circuit pack. After fuse is removed and replaced, check A1 through A9, then B1 through B8 in BAY 0 and A1 through of the TTY printout identifies any units interrupted A9, then B1 through B8 in BAY 1.
Page 240 SUMMARY Replace first group of fuses and continue removing groups Remove first group of fuses listed in TABLE A and measure of fuses, using procedure used in checking first group output voltage of each fuse socket. Note name of any of fuses fuses with voltage equal to or greater than 0.5 volts.
Page 241 [1] Is clock [2] Enter [4] Convert to octal, circuit pack to [3] See Figure 1. VER:UTYPE:TSI a! bits 18 through 22, be removed Is bit 23 of word a = member number of word 5 to find associated with 5 set to 1 of TSI having clock EST member number...
Page 242 [7] See Figure 1, [8] Convert to octal, Page 1. Using printout bits 18 through 22, received in response of word 5 to to Step 6, Page 1, input determine EST message, is bit 23 of frame member number word 5 set to 1 [9] See Figure 1.
Page 243 TABLE A BITS ASSOC TRNSL TSI TYPE TSI CLOCK WORD Clock 0 Frame type Frame type Bit (0-10) (DT=0001) Member number (DT=0001) Member number TSI-A Clock 1 (VIF=0011) (DT, VIF, DIF, PUC) (VIF=0011) (DT, VIF, DIF, PUC) SD-4A011-02 Bit (11-21) (DIF=0100) (DIF=0100) (PUC=0101)
Page 244 [2] At all 39B [1] See NOTE 1 and oscillators, Figure 1, Page 2. set STROBE At TTY, enter switch to RMV:SCLK 0,NCSU 0! DISABLE [4] See NOTE 3. [3] See At TTY, enter NOTE 2. Is mate RST:NCLK 0,CHAIN a;UCL! clock chain a = out-of-service in service...
Page 245 39B OSCILLATOR TROUBLE FORM SERIAL NUMBER OFFICE CLLI MODE OF FAILURE BENCH TEST IN FRAME PRESERVICE CHECK IN FRAME SERVICE FAILURE -24V CURRENT DRAIN (SKIP INITIAL CHECK IF IN SERVICE) INITIAL CURRENT 1.5 TO 2.7 AMPS) AFTER WARM-UP (0.5 TO 1.2 AMPS) FULL FREQ.
Page 246 TABLE A See TABLE A. At switch location associated with CLOCK POWER SWITCH oscillator being removed: CHAIN FRAME LOCATION [9] Ensure chain OOS; OS and OFF NORM 066-03 ROS/OFF switch is lamps lighted in ROS position 066-68 166-03 PWR OFF Oscillator 166-68 lamp...
Page 247 [18] Is spare 39B oscillator available for replacement [19] Install 24-volt fuse removed in Step 11, Page 3 [TABLE B, Page 3] [20] At appropriate switch location [TABLE A, Page 3] depress ON pushbutton to restore power (PWR OFF lamp extinguishes) and rotate ROS/OFF switch to counterclockwise position (OS and OFF NORM lamps extinguish)
Page 248 [1] See NOTE 1. TABLE A Connect scope probe to terminal CLOCK FB687 FB214 PWR SW CHAIN LOCATION LOCATION LOCATION 201 on FB687 pack [TABLE A] 070-34 066-33 066-03 070-37 066-39 066-68 170-34 166-33 166-03 170-37 166-39 166-68 [2] Is waveform between 0.5 volt and 0.9 volt Page 5...
Page 249 [7] Remove scope probe from pack LEVEL ADJUSTMENT [8] Connect Oscillator Manual Adjustment Unit (OMAU) to oscillator [DLP-532] STROBE ENABLE [9] Check 39B oscillator frequency DISABLE hi/low bits [DLP-539] INDICATORS SLIDE SWITCH [10] Disconnect Oscillator Manual Figure 1 — 39B Oscillator Adjustment Unit from oscillator [DLP-531] [11] Verify connector J20 of oscillator...
Page 250 [16] Recheck 39B oscillator level. Connect scope probe to terminal 018 of FB214 pack associated with clock chain removed from service [TABLE A, Page 1] Chain can be [21] Rotate restored with [17] Is waveform [20] Did ROS switch to [19] Remove oscillator between 1.8 volts...
Page 251 [22] At TTY, enter [27] Call [25] Has procedure DGN:SCLK 0,NCSU 0:NCLK 0,CHAIN a! [23] Is next level of for clearing a a = chain associated diagnostic technical phase error been with oscillator being support for performed checked assistance [24] Clear diagnostic [26] Clear failure...
Page 252 [33] Remove probe from terminal 201 [32] Remove [28] Is of FB687 pack and oscillator waveform touch probe to center output present pin of oscillator connector P13 output jack [29] Remove level [36] Correct adjustment cover from oscillator output [34] Is front left side of 39B cable problem waveform...
Page 253 [41] Remove probe and [39] Remove probe from replace FB687 pack terminal 018 and connect [37] Is waveform [40] Is waveform associated with clock it to terminal 201 of between 1.4 volts between 0.87 volt chain removed from FB687 pack associated and 2.4 volts and 0.97 volt service [TABLE A]...
Page 254 [56] See TABLE A. Remove probe [51] Could [57] Is from terminal 018 waveform be waveform 0.1V Page 8 of FB214 pack adjusted to 1.9 or greater and connect it to volts peak-to-peak terminal 201 of FB687 pack [58] Remove 39B oscillator level [52] See TABLE A, adjustment cover,...
Page 255 [61] On back of fuse TABLE B [63] Clear panel, measure —DC [62] Is —24V power problem voltage between output voltage +24V FUSE CLOCK CONVERTER SD-4A014-02 [SD-4A014-02] between —22 terminal 1 of —24 volt CHAIN LOCATION FUSES LOCATION converter and frame and —26 volts ground [TABLE B] 012-22...
Page 256 [71] Remove +24V fuse removed in Step 65, Page 8 [72] Reconnect POWER [76] Contact next [74] Has procedure connectors P18 and higher level of been repeated from P19 to oscillator technical support Step 4 once for assistance [73] Replace fuse removed in Step 71 [75] Repeat from Step 4, Page 1...
Page 257 [1] With the clock chain of the oscillator being checked powered down, note the zero setting (mechanical zero) of the phase meter [See NOTE 1] [2] At clock chain power switch, with ROS/OFF switch in ROS position, depress ON switch (PWR OFF lamp extinguishes) Page 2 [3] Set OMAU thumbwheels to 2000...
Page 258 [11] Decrease [5] Is oscillator [12] Is OMAU OMAU thumbwheel PHASE METER at zero FREQ HI LED setting by hex Page 3 for oscillator lighted 0010 and depress being checked [Figure 1, Page 1] LOAD button [7] Depress [6] Is and release [13] Is oscillator PHASE METER...
Page 259 [16] Increase OMAU [21] Increase OMAU [17] Is OMAU thumbwheel setting thumbwheel setting Page 4 FREQ HI LED by hex 0010 and by hex 0010 and depress LOAD button depress LOAD button [18] Is [20] Record oscillator that FREQ HI PHASE METER bit is bad at zero...
Page 260 [22] Is OMAU [26] Decrease OMAU FREQ LOW LED lit thumbwheel setting Page 5 [Figure 1, Page 1] by hex 0010 and depress LOAD button [23] Is oscillator [25] Record PHASE METER one that FREQ LOW division left bit is bad of zero [24] Repeat from Step 20 increasing...
Page 261 [31] Was bad [27] Is OMAU FREQ HI and/or FREQ LOW LED FREQ LOW bit recorded [28] Is [30] Record oscillator [32] Call that FREQ LOW PHASE METER 4ESAC for bit is bad at zero assistance [29] Repeat from Step 25 decreasing OMAU thumbwheel setting by hex 0010 and depress LOAD...
Page 262 [1] See CAUTION 1. Calibrate scope [DLP-529] [2] At power switch [TABLE A], note position of ROS/OFF switch [6] Remove scope [5] Is waveform probe from pack and OS and OFF between 1.8 volts restore ROS/OFF NORM lamps and 2.0 volts [3] Rotate ROS/OFF switch switch to position lighted...
Page 263 [7] Remove level adjustment cover from front left side of 39B oscillator [Figure 1] of chain being tested [TABLE A, Page 1] [11] Remove scope [8] Adjust level adjustment [10] Could probe from pack and potentiometer to measure waveform be restore ROS/OFF 1.9 volts peak-to-peak adjusted to 1.9...
Page 264 [4] At TTY, enter [1] Is mate RST:NCLK 0,CHAIN a! clock chain a = out-of-service in service mate chain [2] See TABLE A. At [7] Analyze switch location associated F-Level interrupt with DRO oscillator being [5] Did mate [6] Is F-Level using Output installed: Ensure chain...
Page 265 [8] Place DRO oscillator in network clock frame [Figure 1] OSCILLATORS [9] Install and tighten screws with star washers holding DRO oscillator mounting plate to frame [10] Connect ground strap from frame upright to DRO oscillator [Figure 1] [12] Connect PHASE LOCK INPUT P21 [11] Remove —48V fuse for the DRO and POWER INPUT —48V DC P19 oscillator being installed...
Page 266 [18] See NOTE 1. At TTY, enter [16] Is failed RST:NCLK O,CHAIN a;UCL! diagnostic a = out-of-service phase mate chain 1, 2, or 3 [17] Isolate [20] Repeat [19] Did suspect clock from Step 5 mate chain chain, diagnostic restore failure [TAP-136] [21] Contact next higher level of...
Page 267 [1] Using thumbwheels on oscillator TABLE A manual adjustment unit, ALARMS LED OMAU FREQUENCY set in first frequency OSC WRITE WORD ADJUST FREQ FREQ DISPLAY (HEX) word listed [TABLE A] MAJOR MINOR THUMBWHEEL [2] Depress LOAD pushbutton on oscillator manual OMAU VERIFY —...
Page 268 [4] If hex display or alarm LEDs do not correspond to expected display, record oscillator display [5] Have all [7] Does frequency words oscillator have in TABLE A, Page 1, full frequency been checked range problem [6] Using thumbwheels [8] Has a second on oscillator manual oscillator passed adjustment unit, set...
Page 269 [1] Obtain scope and TABLE A TABLE B allow it to warm up CLOCK CLOCK FB214 PACK LOCATION CHAIN RELAY CHAIN LOCATION [2] Enter RMV:NCLK 0,CHAIN a! a = chain to be adjusted 066-24 066-33 0PHR 066-47 066-39 1PHR [3] At rear of clock chain, connect 166-24 166-33 0PHR...
Page 270 [11] Record hex display on front of oscillator [12] Record thumbwheel reading [14] Is oscillator at oscillator manual hex display adjustment unit same as noted in Step 11 [13] Disconnect oscillator manual adjustment unit from oscillator [DLP-531] [15] Reconnect oscillator [17] Call manual 4ESAC for...
Page 271 [2] At NCSU 1A power [1] Is BSRF switch, rotate ROS/OFF the regular to ROS (OS and OFF Page 2 timing reference NORM lamps light) [DLP-528] and depress (PWR OFF lamp lights) [4] At rear of [8] SYNC channel 1 [3] Ensure NCSU, connect [5] Is 2.048 MHz...
Page 272 [9] Ensure NCSU circuit packs listed TABLE B in TABLE B are installed TABLE C PACK LOCATION 65-100T 65-102T 65-103T 050-65 FG64 [10] Remove NCSU circuit packs 65-106T 65-117B 65-019B located at 050-63 and 050-59 050-67 FG65 (FG61 and FG62) 050-25 FG72 050-27...
Page 273 [20] See NOTE 4. Connect channel 2 scope probe to 8-kHz framing pulse at terminal 210 of FA626 pack [TABLE D] [21] At scope, set CRT display to CHOP mode [26] Repeat from [25] Is [22] See NOTE 5. Set horizontal controls for Step 24, changing channel 2 µ...
Page 274 [27] See NOTE 6. Make additional adjustments until channel 2 waveform moves less than 100 ns in 15 minutes [Figure 2] [28] Record hex display at front of oscillator Page 5 [29] Record thumbwheel reading at oscillator manual adjustment unit [30] Disconnect oscillator manual adjustment unit from oscillator [DLP-531]...
Page 275 [35] Remove [31] Is oscillator all clipleads LED display and probes used same as noted during this in Step 29, Page 4 procedure [34] Call 4ESAC for assistance [36] Is BSRF the regular timing [32] Reconnect reference (from oscillator Step 1, Page 1) manual adjustment unit [DLP-532]...
Page 276 [2] At all DRO oscillators, [1] At TTY, enter set ENABLE/ RMV:SCLK 0,NCSU 0! NOTES switch to DISABLE 1. Clock chains [Figure 1] DISABLE 0 and 1 are paired and clock chains 2 and 3 are paired [4] See NOTE 2. 2.
Page 277 TABLE A See TABLE A. At switch location associated with CLOCK POWER SWITCH oscillator being removed: OS and CHAIN FRAME LOCATION [9] Ensure chain OOS; OFF NORM 066-03 ROS/OFF switch is lamps go on in ROS position 066-68 166-03 PWR OFF Oscillator 166-68 lamp goes...
Page 278 [18] Is spare DRO oscillator available for replacement [19] Install —48V fuse removed in Step 11, Page 2 [TABLE B, Page 2] [20] At appropriate switch location [TABLE A, Page 2], depress ON pushbutton to restore power (PWR OFF lamp extinguishes) and rotate ROS/OFF switch to counterclockwise position (OS and OFF NORM lamps extinguish) [21] At TTY, enter...
Page 279 [1] See NOTE 1. TABLE A Connect scope probe to terminal CLOCK FB687 FB214 PWR SW CHAIN LOCATION LOCATION LOCATION 201 on FB687 pack [TABLE A] 070-34 066-33 066-03 070-37 066-39 066-68 170-34 166-33 166-03 170-37 166-39 166-68 [2] Is waveform between 0.5 volt and 0.9 volt Page 4...
Page 280 [7] Remove scope probe from pack [8] Verify connector J20 of oscillator and cable connector at NCSU are well seated [12] See NOTE 4. Does report message [9] On all DRO oscillators, ensure ENABLE/DISABLE indicate manual update switch is set to ENABLE [Figure 1] required (TTY Response: RST:NCLK 0,OSC a ABORTED:...
Page 281 [13] Did report [14] Rotate message in Step 12, ROS switch Page 2 indicate to normal "CHAIN a O/S, position OSC O MARKED I/S" [20] Call [15] At TTY, enter [18] Has procedure next level of DGN:SCLK 0,NCSU 0:NCLK 0,CHAIN a! [16] Is for clearing a technical...
Page 282 [26] Remove probe from terminal 201 [25] Remove [21] Is of FB687 pack and DRO oscillator waveform touch probe to center RF OUTPUT present pin of oscillator connector P13 output jack [22] Remove level [29] Correct adjustment cover from oscillator output [27] Is front side of DRO cable problem...
Page 283 [34] Remove probe and [32] Remove probe from replace FB687 pack terminal 018 and connect [30] Is waveform [33] Is waveform associated with clock it to terminal 201 of between 1.4 volts between 0.87 volt chain removed from FB687 pack associated and 2.4 volts and 0.97 volt service [TABLE A]...
Page 284 [49] See TABLE A. Remove probe [44] Could [50] Is from terminal 018 waveform be waveform 0.1V Page 7 of FB214 pack adjusted to 1.9 or greater and connect it to volts peak-to-peak terminal 201 of FB687 pack [51] Remove DRO oscillator level [45] See TABLE A, adjustment cover,...
Page 285 [54] On back of fuse TABLE B [55] Is panel, measure —DC [56] Clear voltage between fuse voltage FUSE LOCATION power problem CLOCK OSCILLATOR SD-4A014-02 between —40 output and frame CHAIN LOCATION FUSES [SD-4A014-02] and —56 volts ground [TABLE B] 033-21 033-56 133-21...
Page 286 [64] Remove —48 volt fuse removed in Step 58, Page 7 [65] Reconnect POWER [67] Has [69] Contact next connector P19 procedure been higher level of to oscillator repeated from technical support Step 4 once for assistance [66] Replace fuse removed in Step 64 [68] Repeat from Step 4,...
Page 287 [1] See CAUTION 1. Calibrate scope [DLP-529] [2] At power switch [TABLE A], note position of ROS/OFF switch [6] Remove scope [5] Is waveform probe from pack and between 1.8 volts OS and OFF restore ROS/OFF and 2.0 volts NORM lamps [3] Rotate ROS/OFF switch switch to position peak-to-peak...
Page 288 [7] Remove level adjustment cover from front side of DRO oscillator [Figure 1] of chain being tested [TABLE A, Page 1] [11] Remove scope [8] Adjust level adjustment [10] Could probe from pack and potentiometer to measure waveform be restore ROS/OFF 1.9 volts peak-to-peak adjusted to 1.9 switch to position...
Page 289 [1] Operate STATUS-OFF-RESET/LAMP switch [Figure 1] to RESET/LAMP position and hold until status indicator test begins [3] Did all LEDs light as expected [2] See NOTE 1. Verify that all status LEDs and all HEX display segments light except for TOS INHIBIT and two FAIL LEDs [4] Replace DRO ocillator...
Page 290 [1] On back of fuse TABLE A [2] Is panel, measure —DC [3] Clear voltage between fuse voltage FUSE LOCATION power problem CLOCK OSCILLATOR SD-4A014-02 between —40 output and frame CHAIN LOCATION FUSES [SD-4A014-02] and —56 volts ground [TABLE A] 033-21 033-56 133-21...
Page 291 [1] See CAUTION 1. Calibrate scope [DLP-529] [2] At terminal block 052-03, [4] Does [5] Contact attach probe ground to pin 090 waveform sync coordinator and scope probe to pin 091 resemble for assistance Figure 1 [3] See Figure 1. Observe waveform for symmetry and amplitude [NOTES 1 &...
Page 292 ITEM ISSUE ITEM ISSUE ITEM ISSUE ITEM ISSUE ITEM ISSUE ITEM ISSUE DLP-506 IXL-001 TAP-123 DLP-541 NTP-002 TAP-124 DLP-507 DLP-542 NTP-003 TAP-125 DLP-508 DLP-543 NTP-004 TAP-126 DLP-509 DLP-544 NTP-005 TAP-127 DLP-510 DLP-545 NTP-006 TAP-128 DLP-511 DLP-546 NTP-007 TAP-129 DLP-512 DLP-547 TAP-130 NTP-008 DLP-513...

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