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Northern Telecom BCS35 Replacement Manual

Card replacement guide, distributed processing peripheral
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Distributed Processing Peripheral
Card Replacement Guide
BCS35 and up
Standard 01.03
August 1996
DPP
DPP
297-1001-536

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Summary of Contents for Northern Telecom BCS35

  • Page 1 297-1001-536 Distributed Processing Peripheral Card Replacement Guide BCS35 and up Standard 01.03 August 1996...
  • Page 3 All rights reserved. Printed in Canada and printed in the United States of America. Information is subject to change without notice. Northern Telecom reserves the right to make changes in design or components as progress in engineering and manufacturing may warrant.
  • Page 4 Publication history August 1996 Standard release 01.03 for software release BCS36 and up. This version includes changes to this "Publication history" page. December 1993 Standard release 01.02 for software release BCS36 and up. 297-1001-536 Standard 01.03 August 1996...

  • Page 5: Table Of Contents

    Replacing QSIO circuit pack 6–2 56K Interface circuit pack 7–1 General description 7–1 Replacing the 56K Interface circuit pack 7–2 DISK Interface circuit pack 8–1 General description 8–1 Replacing the Disk Interface circuit pack 8–1 DPP Card Replacement Guide BCS35 and up...
  • Page 6 iv Contents SCSI Interface circuit pack – turbo only 9–1 General description 9–1 Replacing the SCSI circuit pack 9–2 Data Stream Interface circuit pack 10–1 General description 10–1 DSI primary function 10–1 DSI cable adapter assemblies 10–1 Bus terminator circuit pack 11–1 General description 11–1 Replacing Bus terminator circuit pack 11–1...
  • Page 7 Table 3–1 EPROM circuit pack (A2 and B2) options part number: NT6M63BF; BCS21–24 DPP systems 3–6 Table 3–2 EPROM circuit pack (A2 and B2) options – part number: NT6M63CF, BCS21–24 DPP systems; NT6M63CH, DPP systems w/o 56K polling 3–7 DPP Card Replacement Guide BCS35 and up...
  • Page 8 vi Contents Table 3–3 EPROM circuit pack (A2 and B2) options – part number: NT6M63CJ 3–9 Table 3–4 EPROM circuit pack (A2 and B2) options – part number; NT6M63CL, DPP systems with 56K polling 3–10 Table 4–1 Extended memory circuit pack (A3 and B3) options – part number: NT6M64AA 4–4 Table 5–1 Error control II circuit pack (A5) options –...
  • Page 9 Procedure 13–1 Disk XOVR circuit pack replacement 13–2 Procedure 14–1 SCSI XOVR circuit pack replacement 14–2 Procedure 15–1 56K XOVR circuit pack replacement 15–2 Procedure 16–1 Four–Channel Comm circuit pack replacement 16–3 Procedure 17–1 Power supply replacement 17–4 DPP Card Replacement Guide BCS35 and up...
  • Page 11 Applicability of this document Northern Telecom (NT) software releases are called batch change supplements (BCS) and are identified by a number, for example, BCS35. This document applies to DMS–100 Family offices with BCS35. Unless the document is revised, it also applies to offices with software releases greater than BCS35.
  • Page 12 Documents in the DPP documentation package The DMS–100 Family library is structured in numbered layers, each of which is associated with a Northern Telecom product. The DPP documentation package is in the 297–1001 layer. The list of DPP documents follows.
  • Page 13 297–1001–574 DIRP Recovery Procedures 297–1001–572 DIRP Routine Maintenance Guide 297–1001–356 DIRP Translation Guide 297–1001–510 Log Report Manual 297–1001–451 Customer Data Schema (contains the five DPP translations tables) 297–1001–513 Input/Output Devices (IOD) Man–Machine Interface Description DPP Card Replacement Guide BCS35 and up...
  • Page 14 xii About this document NT and BNR trademarks and the products they represent The following chart lists all NT and BNR trademarks in this document. Trademark Product Digital multiplex system telephone switching equipment telecommunications switching equipment DMS SuperNode Maintenance and administration position telephone communication equipment 297-1001-536 Standard 01.03 August 1996...
  • Page 15 Use light thumb pressure to align the card with the connectors. Next use the levers to seat the card into the connectors. Failure to align the card first may result in bending of backplane connector pins. DPP Card Replacement Guide BCS35 and up...
  • Page 16 xiv About this document How commands, parameters, and responses are represented In this document, commands, parameters, and responses are represented according to the following conventions. Input prompt (>) An input prompt (>) indicates that the following information is a command. Type the command that follows the input prompt and press the carriage return key.

  • Page 17: How To Use This Document

    ONLY mode before replacing the circuit pack. If a card causes a level 2 alarm in the active processor, the DPP will switch processors if the standby processor has a level 1 or level 0 alarm or less. DPP Card Replacement Guide BCS35 and up...
  • Page 18 2 Circuit Pack Replacement General Troubleshooting Guidelines The circuit packs used here are only examples. This troubleshooting procedure is valid for any combination of circuit pack printouts. Enter the command TEST ACT or TEST STDBY and the following printout may appear: DPP STANDBY/ACTIVE FAULT ERROR DETECTED ON PROC (A or B) CPU CARD...
  • Page 19 CPU card in Slot 1. processor. Test the processors with the TEST ACT or TEST STDBY command. If the test passes, place the DPP in the PRIME processor mode and let it soak for 2 days. (continued) DPP Card Replacement Guide BCS35 and up...

  • Page 20: Changing Processor Modes

    4 Circuit Pack Replacement Procedure 1–1 DPP troubleshooting procedure – no specific fault indicator available (continued) Step Action Notes If the test immediately fails or the NT6M63xx: EPROM card, error reoccurs during the soak time, slot 2. repeat Step 6a, replacing NT6M63xx NT6M64xx: DRAM card, in Step 6b.
  • Page 21 Go to one of the procedures referenced in step 6, as required. Go to the appropriate chapters in this document for replacement procedures for the circuit packs. The document is organized according to circuit pack. DPP Card Replacement Guide BCS35 and up...

  • Page 23: Central Processor Unit (Cpu)

    The Parallel Input/Output (PIO) Circuit IC is used for all interprocessor communications. The clock signal used to drive the Z80 microprocessor originates from a crystal on the CPU circuit pack. DPP Card Replacement Guide BCS35 and up...

  • Page 24: Central Processor Unit Led Display

    8 CPU circuit pack Central processor unit LED display The CPU circuit pack contains a seven–segment display Light Emitting Diode (LED) that provides a visual display of error control status. Five hardware status lines are decoded to display CPU fault conditions. The display also contains a decimal point feature that provides a visual display of the CPU clock.
  • Page 25 "S/W Loaded" to print. At the maintenance terminal, enter: To clear any alarms on the standby processor. Alarms >RSERR STDBY 00 (cr) will clear if there are no faults. (continued) DPP Card Replacement Guide BCS35 and up...
  • Page 26 10 CPU circuit pack Procedure 2–1 Replacing CPU circuit pack – slot 1 (continued) Step Description Notes At the maintenance terminal, enter: After RSERR, alarms may reappear. TEST forces >TEST STDBY 00 (cr) diagnostics which confirm if the fault were corrected. Place the active processor unit in PRIME mode.
  • Page 27 Figure 2–1 CPU with DMA (A1 and B1) circuit pack (NT6M62BA) options LED Display ♦ Note: Switch SW2 is a four–position right angle dip switch at the edge of the CPU circuit pack. DPP Card Replacement Guide BCS35 and up...
  • Page 28 12 CPU circuit pack Table 2–1 ECAC alarm reporting priority sequence – LED display codes Level Category Response Notes Major Invalid CPU Response Critical Critical Processor switch occurs. Level 3 Critical Critical Processor switch occurs. Level 2 Critical Critical Processor switch occurs. Level 1 Critical Critical...
  • Page 29 This is an invalid condition since data written to (invalid) either port may be displayed. Neither Port No data is written to the display circuit, causing (invalid) an error condition display = E. DPP Card Replacement Guide BCS35 and up...
  • Page 30 14 CPU circuit pack Table 2–3 CPU with DMA circuit pack (A1 and B1) options – part number: NT6M62BA Device type Position/setting Function Setting number Factory On–site Jumper PINS: 1–2 (J3) 2–3 8 KHz clock from Determines whether the DPP pin 1 is closest DMS–100 enabled.
  • Page 31 Do not press SW1 unless instructed to do so; activation may cause billing data loss if done on the active processor. Notes: 1. Although these options are on the CPU card, they are not active in any DPP application. DPP Card Replacement Guide BCS35 and up...

  • Page 33: Eprom Circuit Pack

    Another method is to replace the entire circuit pack. Note: 1 If replacing EPROM ICs, check the reference number on the circuit pack diagram to make sure the right EPROM type is being used. DPP Card Replacement Guide BCS35 and up...

  • Page 34: Eprom Ic Precautions

    18 EPROM circuit pack EPROM IC precautions Follow these precautions when installing new or replacement EPROM ICs: • Handle all ICs by the plastic or ceramic package, not by their metal pins. • Do not expose the ICs to excessive force (dropping) or to large fields of electrical or magnetic energy (power transformers, static discharge).
  • Page 35 24 pins, instal to the rear of the 28–pin socket. IC–pin 1 lines up over socket–pin 3. Do not remove the coded label from the IC. (continued) DPP Card Replacement Guide BCS35 and up...
  • Page 36 20 EPROM circuit pack Procedure 3–1 EPROM IC installation procedure Step Description Notes Update the label every time an Each circuit pack with an EPROM is changed on that circuit EPROM chip (or chips) has a pack firmware ID label. The data for the label is on the EPROM label.
  • Page 37 Apply power to the DPP chassis by Wait for start–up activity to resetting the rocker switch in step 4 end and the message, above. "Software Loaded" to print. (continued) DPP Card Replacement Guide BCS35 and up...
  • Page 38 22 EPROM circuit pack Procedure 3–2 Replacing EPROM circuit pack Step Description Notes At the maintenance terminal, enter: To clear any alarms on the standby processor. Alarms >RSERR STDBY 00 (cr) will clear if there are no faults. At the maintenance terminal, enter: After RSERR, alarms may reappear.
  • Page 39 Note: This figure represents the following part numbers: NT6M63BF (BCS21–24 DPP systems) NT6M63CF (BCS21–24 DPP systems) NT6M63CH (DPP systems w/o 56K polling) NT6M63CJ (DPP systems w/56K polling) NT6M63CL (DPP systems w/56K polling; nonturbo) DPP Card Replacement Guide BCS35 and up...
  • Page 40 24 EPROM circuit pack Table 3–1 EPROM circuit pack (A2 and B2) options part number: NT6M63BF, NT6M63CL, NT6M63CH, NT6M63CF; BCS21–up DPP w/o 56K polling Device type Position/setting Function Setting (number) Factory On–site Jumper No DRAM circuit pack (P2) Use with DRAM circuit pack Jumper Type...
  • Page 41 Note 2: There are no customer–definable options on this circuit pack. Use this data for verification during initial DPP system installation and/or circuit pack replacement to make sure the replacement circuit pack is set up the same as the circuit pack being replaced. DPP Card Replacement Guide BCS35 and up...
  • Page 42 26 EPROM circuit pack Table 3–2 EPROM circuit pack (A2 and B2) options – part number: NT6M63CJ; DPP w/ 56K polling Device type Position/setting Function Setting (number) Factory On–site Jumper No DRAM circuit pack (P2) Use with DRAM circuit pack Jumper Type (U5)
  • Page 43 EPROM circuit pack 27 Table 3–2 EPROM circuit pack (A2 and B2) options – part number: NT6M63CJ; DPP w/ 56K polling Device type Position/setting Function Setting (number) Factory On–site Rotary None Used Switch Switch None Used DPP Card Replacement Guide BCS35 and up...

  • Page 45: Memory Expansion Circuit Pack

    See Table 4–1 for the jumper option settings on this circuit pack (these are standard, not user–defined). Figure 4–1 shows jumper location and circuit pack layout. Replacing the Memory Expansion circuit pack To replace the Memory Expansion circuit pack, use the following procedure. DPP Card Replacement Guide BCS35 and up...
  • Page 46 30 Memory expansion circuit pack Procedure 4–1 Replacing the Memory Expansion circuit pack CAUTION Since all DPP circuit packs are static sensitive, be careful handling them. Wear a wrist grounding strap when working with the DPP. There are jacks at the lower right of the Rover Interface panel (B chassis) and the lower right of the Switch and Status Panel (A chassis) to accept the banana plug connection on the end of a grounding...
  • Page 47 TEST ACT (cr) TEST STDBY (cr) Note: Make sure any circuit pack option settings are correct before replacing any cards. Incorrect settings can cause improper performance and produce faultlike symptoms in the DPP. DPP Card Replacement Guide BCS35 and up...
  • Page 48 32 Memory expansion circuit pack Table 4–1 Memory Expansion circuit pack (A3 and B3) options – part number: NT6M64AA Device type Position/setting Function Setting (number) Factory On–site Jumper Must be (card 1 in the same Card 1 as the Card 2 factory Card 1 (64K only) (All...
  • Page 49 Memory expansion circuit pack 33 Figure 4–1 Memory Expansion circuit pack (A3 and B3) circuit pack (NT6M64AA) options • • • DPP Card Replacement Guide BCS35 and up...

  • Page 51: Error Control Ii And Error Control Ii Jumper Circuit Packs

    If there is a minor problem during the test, the LED lights and immediately dims. However, if the LED stays lit, check the MAP output for failure indications. See DPP Alarm Clearing and Performance Monitoring Procedures (297–1001–543) for repair procedures. DPP Card Replacement Guide BCS35 and up...

  • Page 52: Error Control Ii Circuit Pack Jumper Led

    36 Error Control II and Error Control II Jumper circuit packs Error control II circuit pack jumper LED The LED on the Error Control II Jumper circuit pack (slot 5; B chassis) lights to indicate the toggle switch on the circuit pack has been activated, up position.
  • Page 53 B chassis. Power down the A chassis by pressing down the red rocker switch to 0. Replace the Error Control II circuit Slot 5. pack in the A chassis. (continued) DPP Card Replacement Guide BCS35 and up...
  • Page 54 38 Error Control II and Error Control II Jumper circuit packs Procedure 5–1 Replacing Error control II circuit pack (A5) (continued) Step Description Notes CAUTION Since all DPP circuit packs are static sensitive, be careful when handling them. Return power to the A chassis using Wait for power–up activity to end and the rocker switch on the power supply.
  • Page 55 Note 1: LED display on the CPU (slot A1) may be invalid at this point; ignore the display, proceed. Replacement procedures When replacing the Error Control II Jumper circuit pack, use the following procedure. DPP Card Replacement Guide BCS35 and up...
  • Page 56 40 Error Control II and Error Control II Jumper circuit packs Procedure 5–2 Replacing Error control II Jumper circuit pack CAUTION Since all DPP circuit packs are static sensitive, observe all precautionary measures. CAUTION Wear a wrist grounding strap when working with the DPP.
  • Page 57 Perform any necessary activities to respond to any RSERR ACT 00 (cr) alarms or error messages. then, RSERR STDBY 00 (cr) At the maintenance terminal, enter: TEST ACT (cr) TEST STDBY (cr) DPP Card Replacement Guide BCS35 and up...
  • Page 58 42 Error Control II and Error Control II Jumper circuit packs Table 5–1 Error control II circuit pack (A5) options – part number: NT6M65AA Device type Position/setting Function Setting (number) Factory On–site Jumper None Used Strap None Used None Used Switch Rotary None Used...
  • Page 59 DPP system installation and/or circuit pack replacement to make sure the replacement circuit pack is set up the same as the circuit pack being replaced. Note 3: The LED (DS1) lights when toggle switch (SW1) is moved to the (up) On position. DPP Card Replacement Guide BCS35 and up...
  • Page 60 44 Error Control II and Error Control II Jumper circuit packs Figure 5–1 Error control II (A5) circuit pack (NT6M65AA) options 297-1001-536 Standard 01.03 August 1996...
  • Page 61 Error Control II and Error Control II Jumper circuit packs 45 Figure 5–2 Error control II jumper (B5) circuit pack (NTM609AB) options Note: LED (DS1) lights when toggle switch (SW1) is moved to the (up) On position. DPP Card Replacement Guide BCS35 and up...

  • Page 63: Qsio Circuit Pack

    The settings on each SIO channel baud rate selector switch correspond to different baud rates. These rates differ for synchronous and asynchronous DPP Card Replacement Guide BCS35 and up...

  • Page 64: Replacing Qsio Circuit Pack

    48 QSIO circuit pack ports. Since the SIO channels have both synchronous and asynchronous ports, the baud rates corresponding to the switch settings are not the same for all SIO baud switches. Note: Enter the baud rate set command BAUD to establish software control of the QSIO channel.
  • Page 65 Apply power to the DPP chassis by Wait for start–up activity to resetting the rocker switch in step 4 end and the message, above. "Software Loaded" to print. (continued) DPP Card Replacement Guide BCS35 and up...
  • Page 66 50 QSIO circuit pack Procedure 6–1 Replacing the QSIO circuit pack (continued) Step Description Notes At the maintenance terminal, enter: To clear any alarms on the standby processor. Alarms >RSERR STDBY 00 (cr) will clear if there are no faults. At the maintenance terminal, enter: After RSERR, alarms may reappear.
  • Page 67 Note: This PCB will only allow external timing to be set in the modem. Controls the Select Select switch operation of synchronous asynchronous S2–1 S2–2 S2–3 S2–4 S3–1 S3–2 S3–3 S3–4 (continued) DPP Card Replacement Guide BCS35 and up...
  • Page 68 52 QSIO circuit pack Table 6–1 QSIO circuit pack (A6 and B6) options – part number: NT6M60AA (continued) Device type Position/setting Function Setting (number) Factory On–site Position Address Select the logical Must be Switch address of the SIO the same (S1) circuits.
  • Page 69 Note 3: The MMI Link (DPP to DMS–100 two–way communication channel connected to connector J2 is MMI Link 1. Note 4: The MMI Link (DPP to DMS–100 two–way communication channel connected to connector J3 is MMI Link 2. Note 5: Listed for reference only; not supported in software. DPP Card Replacement Guide BCS35 and up...
  • Page 70 54 QSIO circuit pack Figure 6–1 QSIO (A6 and B6) circuit pack (NT6M60AA) options Jumper A Note: This circuit pack does not support polling on digital data lines; use for an analog network only . 297-1001-536 Standard 01.03 August 1996...
  • Page 71 QSIO circuit pack (A6 and B6) options – part number: NT6M60BA Device type Position/setting Function Setting (number) Factory On–site Jumper 1–2 Transmit internal Channel A transmit (J2) 2–3 Transmit external clock 1–2 Jumper 1–2 ASYNC Channel A receive (J3) 2–3 SYNC clock 2–3 DPP Card Replacement Guide BCS35 and up...
  • Page 72 56 QSIO circuit pack Table 6–2 QSIO circuit pack (A6 and B6) options – part number: NT6M60BA (continued) Device type Position/setting Function Setting (number) Factory On–site Jumper 1–2 Transmit internal Channel B transmit (J4) 2–3 Transmit external clock 1–2 Jumper 1–2 ASYNC Channel B receive...
  • Page 73 19200 Rotary 1800 MMI Link Switch 75/1200 2000 (2400 (S3) 2400 (Asynchronous chan- baud) 134.5 3600 nel; 2400 baud) 150/2400 4800 300/4800 7200 Channel B baud rate 600/9600 9600 select. 1200 19200 (continued) DPP Card Replacement Guide BCS35 and up...
  • Page 74 58 QSIO circuit pack Table 6–2 QSIO circuit pack (A6 and B6) options – part number: NT6M60BA (continued) Device type Position/setting Function Setting (number) Factory On–site Rotary 1800 MMI Link Switch 75/1200 2000 (2400 (S4) 2400 (Asynchronous chan- baud) 134.5 3600 nel;...
  • Page 75 Note 2: SW4 (BX.25 polling baud rate) (for DPP w/o 56K polling) 4 for 2400 baud 5 for 4800 baud 6 for 9600 baud Note 3: SW5 (local printer speed) 7 for 1200 baud DPP Card Replacement Guide BCS35 and up...
  • Page 76 60 QSIO circuit pack Figure 6–3 Quad SIO (A6 and B6) circuit pack (NT6M60BA) options J5 J4 Note: This circuit pack supports polling on digital data lines or on an analog network. 297-1001-536 Standard 01.03 August 1996...
  • Page 77 S3 MMI link 1 S2 BX.25 polling link Note: 1. S2 (polling modem) is inactive if 56K polling is used. 2. This circuit pack supports polling on digital data lines or on an analog network. DPP Card Replacement Guide BCS35 and up...
  • Page 78 62 QSIO circuit pack Figure 6–5 Quad SIO (A6 and B6) circuit pack (NT6M60BA) peripheral switches and indicators Quad SIO Card Transfer Select Switch Channel Channel Channel Channel Channel 4 Channel 3 Channel 2 Channel 1 SWITCH S8 CHANNEL POSITIONS FUNCTION POSITION NORMAL...

  • Page 79: General Description

    WAIT states. • Host (main CPU side) interface to support fully asynchronous access based on 4 mHz timing of standard Z80 bus cycle without wait states. DPP Card Replacement Guide BCS35 and up...

  • Page 80: 64 56K Interface Circuit Pack

    64 56K Interface circuit pack • Uses 64180 Z80 compatible CPU running at 6Mhz processor clock. • Industry standard two channel SCC chip running at 9.8304 Mhz. With DMA interface, yields baud rates greater than 56K bps. • 32K bytes of data RAM with plug–in sockets for up to an additional 512K bytes.
  • Page 81 Apply power to the DPP chassis by Wait for start–up activity to resetting the rocker switch in step 4 end and the message, above. "Software Loaded" to print. (continued) DPP Card Replacement Guide BCS35 and up...
  • Page 82 66 56K Interface circuit pack Procedure 7–1 Replacing the 56K Interface circuit pack (A7, B7) Step Description Notes At the maintenance terminal, enter: To clear any alarms on the standby processor. Alarms will clear if there are no faults. RSERR STDBY 00 (cr) At the maintenance terminal, enter: After RSERR, alarms may...
  • Page 83 Note 2: There are no customer–definable options on this circuit pack. Information is shown for reference only. This data is to be used for verification during initial DPP system installation and/or circuit pack replacement to make sure the replacement circuit pack is set–up the same as the circuit pack being replaced. DPP Card Replacement Guide BCS35 and up...

  • Page 85: General Description

    See Table 8–1 for the two option jumpers on the circuit pack. Figure 8–1 shows jumper locations and circuit pack layout. Replacing the H.P. Disk Interface circuit pack Use the following procedure to replace this circuit pack. DPP Card Replacement Guide BCS35 and up...

  • Page 86: 70 Disk Interface Circuit Pack

    70 Disk Interface circuit pack Procedure 8–1 Replacing the H.P. Disk Interface circuit pack (A11, B11) CAUTION Since all DPP circuit packs are static sensitive, be careful handling them. Wear a wrist grounding strap when working with the DPP. There are jacks at the lower right of the Rover Interface panel (B chassis) and the lower right of the Switch and Status Panel (A chassis) to accept the banana plug connection on the end of a grounding...
  • Page 87 TEST ACT (cr) TEST STDBY (cr) Note: Make sure any circuit pack option settings are correct before replacing any cards. Incorrect settings can cause improper performance and produce faultlike symptoms in the DPP. DPP Card Replacement Guide BCS35 and up...
  • Page 88 72 Disk Interface circuit pack Table 8–1 Disk interface circuit pack (A11 and B11) options – part number: NT6M66AC and/or NT6M66AL; 72–Mbyte and 140–Mbyte disk drives Device type Position/setting Function Setting (number) Factory On–site Jumper None used Strap None used None used Switch Rotary...
  • Page 89 Note 3: Use this data for verification during initial DPP system installation and/or circuit pack replacement to make sure the replacement circuit pack is set up the same as the circuit pack being replaced. DPP Card Replacement Guide BCS35 and up...
  • Page 90 74 Disk Interface circuit pack Figure 8–1 Disk interface (A11 and B11) circuit pack (NT6M66AH; 380–Mbyte disk drives) options Jumper "R" Jumper "A" 297-1001-536 Standard 01.03 August 1996...
  • Page 91 Disk Interface circuit pack 75 Figure 8–2 Disk interface (A11 and B11) circuit pack (NT6M66AC and NT6M66AL; 72–Mbyte and 140–Mbyte disk drives) options DPP Card Replacement Guide BCS35 and up...
  • Page 92 76 Disk Interface circuit pack Table 8–3xxx Disk interface PCA (A11 and B11) options – part number: NT6M66AH; 380–Mbyte, Device Setting Device Setting Jumper Enable disk Port Interrupt Jumper Watchdog timer reset Strap None used None Used Switch Rotary None Used Switch None Used Switch...

  • Page 93: General Description

    T state when the clock is low). • NCR 5386 SCSI Bus Controller running at 10 mHz. Cycle–Steal DMA yields approximately 0.4 MBytes per second across the SCSI bus. DPP Card Replacement Guide BCS35 and up...

  • Page 94: Replacing The Scsi Circuit Pack

    78 SCSI Interface circuit pack • 32 KBytes of data RAM with plug–in slots for up to an additional 256 Kbytes. • Up to 64 KBytes of program PROM. • Support for disconnect/reconnect operation on the SCSI bus. • Single error detection parity guard on DPR memory. •...
  • Page 95 Apply power to the DPP chassis by Wait for start–up activity to resetting the rocker switch in step 4 end and the message, above. "Software Loaded" to print. (continued) DPP Card Replacement Guide BCS35 and up...
  • Page 96 80 SCSI Interface circuit pack Procedure 9–1 Replacing the SCSI circuit pack – slot 11 (continued) Step Description Notes At the maintenance terminal, enter: To clear any alarms on the standby processor. Alarms will clear if there are no faults. RSERR STDBY 00 (cr) At the maintenance terminal, enter:...
  • Page 97 SCSI Interface circuit pack 81 Figure 9–1 SCSI circuit pack (A11 and B11) NT6M66BA; 380–Mbyte Disk Drives with 56K polling and 760–Mbyte Disk Drives, and NT6M66BD; 1700–Mbyte disk drives, options +BARCODE## DPP Card Replacement Guide BCS35 and up...
  • Page 98 82 SCSI Interface circuit pack Table 9–1 SCSI circuit pack (A11 and B11) options – part number: NT6M66BA; 380–Mbyte disk drives with 56K polling and 760–Mbyte Disk Drives, and, NT6M66BD; 1700–Mbyte disk drives Device type Position/setting Function Setting (number) Factory On–site Jumper Out = 256K (27C256)

  • Page 99: Data Stream Interface Circuit Pack

    J connectors on the DPP. From the J connectors, the signals are routed internally to the DPP DSI circuit packs. See Table 10–1 for option settings on this circuit pack. Figure 10–1 shows the jumper locations and circuit packs’ layout. DPP Card Replacement Guide BCS35 and up...
  • Page 100 84 DSI circuit pack Procedure 10–1 Replacing DSI circuit packs (A12,A13,B12,B13) CAUTION Since all DPP circuit packs are static sensitive, be careful handling them. Wear a wrist grounding strap when working with the DPP. There are jacks at the lower right of the Rover Interface panel (B chassis) and the lower right of the Switch and Status Panel (A chassis) to accept the banana plug connection on the end of a grounding...
  • Page 101 TEST ACT (cr) TEST STDBY (cr) Note: Make sure any circuit pack option settings are correct before replacing any cards. Incorrect settings can cause improper performance and produce faultlike symptoms in the DPP. DPP Card Replacement Guide BCS35 and up...
  • Page 102 86 DSI circuit pack Table 10–1 Data stream interface (DSI) circuit packs (A12 and B12) options – part number: NT6M70AA and NT6M70CF Device type Position/setting Function Setting (number) Factory On–site Strap None used Must be the Switch 1 = On same as (S1) 6 = On...
  • Page 103 DSI circuit pack 87 Figure 10–1 Data stream interface (A12, B12, A13, and B13) circuit packs (NT6M70AA and NT6M70CF) options DPP Card Replacement Guide BCS35 and up...
  • Page 104 88 DSI circuit pack Table 10–2 Data stream interface (DSI) circuit packs (A12 and B12) options – part number: NT6M70AC Device type Position/setting Function Setting (number) Factory On–site U42 EPROM SIZE 2764 Straps: B, D In (Typical) Note: 2732A Straps: F PIN 1 is 27128 Straps: B, E, D...
  • Page 105 EPROM and RAM. Check the manufacturer’s identification of U52, U41, and U42 to verify these settings. See the following chart for factory option settings for U41, U42, and U52. DPP Card Replacement Guide BCS35 and up...
  • Page 106 90 DSI circuit pack Figure 10–2 Data stream interface (A12, B12, A13, and B13) circuit packs (NT6M70AC) options 297-1001-536 Standard 01.03 August 1996...
  • Page 107 DPP system installation and/or circuit packs replacement to make certain that the replacement circuit packs is set–up the same as the circuit packs being replaced. DPP Card Replacement Guide BCS35 and up...
  • Page 108 92 DSI circuit pack Table 10–4 Data stream interface (DSI) circuit packs (A13 and B13) options – part number: NT6M70AC Device type Position/setting Function Setting (number) Factory On–site Strap x = strap to center post U42 and U41 Chip type; strap to use A B C D E F G H with: 2732A...
  • Page 109 Note 2: U52 is typically not equipped. Strapping is shown for reference only. Factory settings for straps S1–8 and S1–9 subject to change based on availability of EPROM and RAM. Check the manufacturer’s identification of U52, U41, and U42 to verify these settings. DPP Card Replacement Guide BCS35 and up...

  • Page 111: Bus Terminator Circuit Pack

    Replacing Bus terminator circuit pack First identify the failing circuit pack to determine which processor (A or B) is off–line. See the following procedure for replacing this pack. DPP Card Replacement Guide BCS35 and up...
  • Page 112 96 Replacing bus terminator circuit pack Procedure 11–1 Replacing bus terminator circuit pack – model numbers G12 or earlier ( D09 or E12 for example) Step Description Notes First get the DPP’s model number WARNING: from the DPP nameplate, A chassis, Perform during low traffic.
  • Page 113 If alarm status shows active alarms, troubleshoot all alarm conditions . At the maintenance terminal, enter: TEST ACT (cr) TEST STDBY (cr) Reinstall the front panel on the DPP. DPP Card Replacement Guide BCS35 and up...
  • Page 114 98 Replacing bus terminator circuit pack Procedure 11–2 Replacing bus terminator circuit pack – models H01 and later ( H02 or I01, for example), Step Description Notes First get the DPP’s model number WARNING: from the DPP nameplate, A chassis, Perform during low traffic.
  • Page 115 Reinsert the DSI circuit packs in slots Return the DSI circuit packs 12 and 13 and the Disk Interface to the appropriate locations. circuit pack in slot 11. (continued) DPP Card Replacement Guide BCS35 and up...
  • Page 116 100 Replacing bus terminator circuit pack Procedure 11–2 Replacing bus terminator circuit pack – models H01 and later ( H02 or I01, for example), Step Description Notes Reattach the DSI cables. Apply power to the chassis. Wait for start–up activity to end and Set the O/P selector switch to the message "S/W loaded."...
  • Page 117 Note 1: There are no customer–definable options on this circuit pack. Information is shown for reference only. Use this data for verification during initial DPP system installation and/or circuit pack replacement to make certain that the replacement circuit pack is set–up the same as the circuit pack being replaced. DPP Card Replacement Guide BCS35 and up...
  • Page 118 102 Replacing bus terminator circuit pack Figure 11–1 Bus terminator (A14 and B14) circuit pack (NT6M68AA) options 297-1001-536 Standard 01.03 August 1996...

  • Page 119: Power And Alarm Communications Circuit Pack

    The optocoupler produces a 120 Hz signal, divided by two to produce a 60 Hz signal. This signal drives a transistor, providing extra drive capability for sending to the CTC on the CPU circuit pack. DPP Card Replacement Guide BCS35 and up...

  • Page 120: Replacing P/A Comm Circuit Pack

    104 P/A Comm circuit pack The P/A Comm pack contains up to eight serial channels; only four are used. These four are configured as a 1–input, 1–output switch. The input is connected to the Quad SIO circuit packs in the DPP card racks. The input interface consists of eight signal lines (plus ground) for each channel.
  • Page 121 Pull the rear panel away from the Put the two panels in a safe cabinet. Remove the front panel of place to prevent bending and the A chassis to improve cooling, if scratching. necessary. (continued) DPP Card Replacement Guide BCS35 and up...
  • Page 122 106 P/A Comm circuit pack Procedure 12–1 Replacing the P/A Comm circuit pack Step Description Notes Remove the cable (P11) connected to CO alarms activate due to 2, 3 the P/A Comm circuit pack. loss of MMI links. Other Remove the other cables. alarms may also activate and the DPP will change to an "Only"...
  • Page 123 Note 4: When replacing the screws, align carefully before tightening to avoid stripping. Tighten the screws, alternating until all are equally tight. Do not "cinch down" any one screw until all are properly aligned; no binding or force needed to turn. DPP Card Replacement Guide BCS35 and up...
  • Page 124 108 P/A Comm circuit pack Table 12–1 P/A Comm circuit pack (A16) options – part number: NT6M84AA (release 01–06) Device type Position/setting Function Setting (number) Factory On–site Jumper None used Strap None used None used Switch Rotary None used Switch Switch None used Notes:...
  • Page 125 Use this data for verification during initial DPP system installation and/or circuit pack replace- ment to make sure the replacement circuit pack is set up the same as the circuit pack being replaced. DPP Card Replacement Guide BCS35 and up...
  • Page 126 110 P/A Comm circuit pack Table 12–2 Power and alarm communications circuit pack (A16) options – part number: NT6M84AA (release 07) Device type Position/setting Function Setting (number) Factory On–site Jumper 1–2 ASEL Control Crossover Control 1–2 Must be (J14) Select – Control the the same 2–3 CPUSEL Control...
  • Page 127 Use these guidelines for to determine the site settings for SW1 and SW2. is done over a digital line: a. If channel A, J1 (BX.25 Polling for BCS25–35 DPP systems w/o 56K polling) positions 1 and 5 all others DPP Card Replacement Guide BCS35 and up...
  • Page 128 112 P/A Comm circuit pack Figure 12–2 Power and alarm communications (A16) circuit pack (NT6M84AA; release 07 and NT6M84BA) options • Notes: 1. The NT6M84AA, release 07, does not support polling on digital data lines; use for an analog network only. 2.
  • Page 129 2–3 channel 4 on the Quad switches for the SIO controlled by the maintenance terminal. setting of J14 only. (Under control of software only.) Strap None used (continued) DPP Card Replacement Guide BCS35 and up...
  • Page 130 114 P/A Comm circuit pack Table 12–3 Power and alarm communications circuit pack (A16) options – part number: NT6M84BA (continued) Device type Position/setting Function Setting (number) Factory On–site Chan. Int/ S1–S2 Switch Setting (S1) S1–1, 5 Off With S2, transmit clock S1–1, 5 On selection, (internal or S1–2, 6 Off...

  • Page 131: Disk Crossover And Controller Circuit Packs

    Figure 13–1 shows the jumper location and circuit pack layout. The Disk Controller options are described in Table 13–2. Replacing Disk Controller circuit pack Use the following procedure when replacing the Disk Crossover circuit pack. DPP Card Replacement Guide BCS35 and up...
  • Page 132 116 Disk Crossover and Controller circuit packs Procedure 13–1 Replacing Disk XOVR circuit pack Step Description Notes CAUTION Since all DPP circuit packs are static sensitive, be careful when handling them. Wear a wrist grounding strap when working with the DPP.
  • Page 133 (3) screws loosened in step 4. Route all wires and cables to avoid pinching or crimping when the rear panel is reinstalled. (continued) DPP Card Replacement Guide BCS35 and up...
  • Page 134 118 Disk Crossover and Controller circuit packs Procedure 13–1 Replacing Disk XOVR circuit pack Step Description Notes Seat the rear panel. Reinstall the From step 1. See the note slotted pan head screws previously about screw tightening. removed. Enter: (at the terminal) This is one message that may appear;...
  • Page 135 Note 3: For circuit packs at A15, make sure jumper J5 is set for selection of the disk drive in the A chassis. Note 4: For circuit packs at B15, make sure jumper J5 is set for selection of the disk drive in the B chassis. DPP Card Replacement Guide BCS35 and up...
  • Page 136 120 Disk Crossover and Controller circuit packs Figure 13–1 Disk II crossover (A15 and B15) circuit pack (NT6M72AC, NT6M72AD, and NT6M72AE; 72– thru 380–Mbyte disk drives w/o 56K or compression polling options Power Connector 297-1001-536 Standard 01.03 August 1996...

  • Page 137: Disk Controller Circuit Pack

    8–bit, parallel, bidirectional SCSI bus. See Table 13–2 for the option settings on this circuit pack. Figure 13–2 shows option locations and circuit pack layout. Note: This pack is not field changeable. DPP Card Replacement Guide BCS35 and up...
  • Page 138 122 Disk Crossover and Controller circuit packs Table 13–2xxx Disk controller circuit pack (A21A1) options – part number: 680–9143 Device type Position/setting Function Setting (number) Factory On–site Jumper State Pri. SCSI Controller ID. Must be (W0) shorted; I.D. = 0 Defines the SCSI the same shorted;...
  • Page 139 The disk controller circuit pack uses as its host interface the industry standard 8–bit, parallel, bidirectional SCSI bus. See Table 13–2 for the option settings on this circuit pack. Figure 13–2 shows option locations and circuit pack layout. DPP Card Replacement Guide BCS35 and up...
  • Page 140 124 Disk Crossover and Controller circuit packs Note: This pack is not field changeable. 297-1001-536 Standard 01.03 August 1996...
  • Page 141 Logical Unit Number Must be (W5) copper tracings; do not modify Assignment. the same (W6) as the (W7) factory (W8) setting. Strap None used None used Switch Rotary None used Switch Switch None used DPP Card Replacement Guide BCS35 and up...
  • Page 142 126 Disk Crossover and Controller circuit packs Table 13–3xxx Disk controller PCA (A21A1) option references – part number: 680–9143 (continued) Device type Position/setting Function Setting (number) Factory On–site Note: Note 1: See Figure 13–1. Note 2: There are no customer–definable options on this circuit pack. Information is shown for reference only. Note 3: Only present on the 72–Mbyte and 140–Mbyte disk drives.
  • Page 143 Disk Crossover and Controller circuit packs 127 Figure 13–4xxx Disk controller (A21A1 and B21A1) PCA (680–9143) options SEQUENCER BUFFER Z8 MICROPROCESSOR EPROM ENC/DEC/VCO SECTOR SIZE OPTIONAL NOT USED W5, W6, W7 W3, W8 DPP Card Replacement Guide BCS35 and up...
  • Page 144 128 Disk Crossover and Controller circuit packs Table 13–4xxx Disk controller PCA (B21A1) option references – part number: 680–9143 Device type Position/setting Function Setting (number) Factory On–site Jumper State Pri. SCSI Controller ID. Must be (W0) shorted; I.D. = 0 Defines the SCSI the same shorted;...
  • Page 145 Function established in the Logical Unit Number Must be (W5) copper tracings. Assignment. the same (W6) as the (W7) factory (W8) setting. Strap None used None used Switch Rotary None used Switch Switch None used DPP Card Replacement Guide BCS35 and up...

  • Page 147: Scsi Crossover Circuit Pack

    See Table 14–1 for the jumper setting on this circuit pack. Figure 14–1 shows the circuit pack layout. Replacing the SCSI circuit pack To replace the SCSI circuit pack, use the following procedure. DPP Card Replacement Guide BCS35 and up...
  • Page 148 132 SCSI Crossover circuit pack Procedure 14–1 SCSI XOVR circuit pack replacement Step Description Notes CAUTION Since all DPP circuit packs are static sensitive, be careful when handling these materials. Wear a wrist grounding strap when working with the DPP. Jacks at the lower right of the Rover Interface panel (B chassis) and the lower right of the Switch and Status Panel (A chassis) are provided to accept the banana plug connection on the end of a grounding strap.
  • Page 149 PRIME disk. Lift the hinged circuit assembly gate Remove the insulating back to its vertical position and tighten material, if used. the (3) screws loosened in step 4. (continued) DPP Card Replacement Guide BCS35 and up...
  • Page 150 134 SCSI Crossover circuit pack Procedure 14–1 SCSI XOVR circuit pack replacement Step Description Notes Route all wires and cables to avoid pinching or crimping when the rear panel is reinstalled. Seat the rear panel. Reinstall the From step 1. See the note slotted pan head screws previously about screw tightening.
  • Page 151 Note 3: For the SCSI Crossover circuit pack at position A15, make sure jumper J5 is set for selecting the disk drive in the A chassis. Note 4: For the SCSI Crossover circuit pack at position B15, make sure jumper J5 is set for selecting the disk drive in the B chassis. DPP Card Replacement Guide BCS35 and up...
  • Page 152 136 SCSI Crossover circuit pack Figure 14–1 SCSI crossover (A15 and B15) circuit pack (NT6M93AA; 380–Mbyte disk drives with 56K polling; 760–/1700–Mbyte disk drives; options Power Connector NT6M89_ _ REL +BARCODE##4 SCSI XOVR 297-1001-536 Standard 01.03 August 1996...
  • Page 153 View with Hinged Card Panel Closed Left Rear A Chassis (with Cabinet Back Removed) SCSI/Disk Crossover cir- cuit pack (A15) Hinged Card Panel (Open) Power and Alarm Communication circuit b. View with Hinged Card Panel Open pack (A16) DPP Card Replacement Guide BCS35 and up...

  • Page 155: Replacing 56K Xovr Circuit Pack

    12–pin power connector like the one on the P/A Comm circuit pack. 56K XOVR circuit pack layout is shown in Figure 15–2. Table 15–1 provides option setting information. Replacing 56K Xovr circuit pack To replace this circuit pack, use the following procedure. DPP Card Replacement Guide BCS35 and up...
  • Page 156 140 56K Crossover circuit pack Procedure 15–1 56K XOVR circuit pack replacement Step Description Notes CAUTION Since all DPP circuit packs are static sensitive, be careful when handling these materials. Wear a wrist grounding strap when working with the DPP. Jacks at the lower right of the Rover Interface panel (B chassis) and the lower right of the Switch and Status Panel (A chassis) are provided to accept the banana plug connection on the end of a grounding strap.
  • Page 157 >RSERR STDBY 00 (cr) At the Switch and Status Panel: If all alarms clear, place the active processor unit in PRIME mode. a. Press the A/B Select Switch to match the active processor. (continued) DPP Card Replacement Guide BCS35 and up...
  • Page 158 142 56K Crossover circuit pack Procedure 15–1 56K XOVR circuit pack replacement (continued) Step Description Notes b. Make the O/P Mode Select Make the active processor the PRIME Switch P. processor. c. Turn the Mode Switch to the Turn it 45 degrees to the right and right.

  • Page 159: Crossover Circuit Pack

    View with Hinged Card Panel Closed Left Rear B Chassis (with Cabinet Back Removed) SCSI/Disk Crossover cir- cuit pack (B15) Hinged Card Panel (Open) 56K Xvr circuit pack (B16) b. View with Hinged Card Panel Open DPP Card Replacement Guide BCS35 and up...
  • Page 160 144 56K Crossover circuit pack Table 15–1 56K crossover circuit pack (B16) options – part number: NT6M48AA Device type Position/setting Function Setting (number) Factory On–site Jumper None used Strap None used None used Switch Rotary None used Switch Switch None used Notes: Note 1: There are no customer–definable options on this circuit pack.
  • Page 161 56K Crossover circuit pack 145 Figure 15–2 56K Crossover (B16) circuit pack (NT6M48AA) Options ♦ ♦ ♦ ♦ ♦ ♦ NT6M48_ _ REL 56K XOVR ♦ ♦ ♦ Power Connector ♦ ♦ ♦ ♦ DPP Card Replacement Guide BCS35 and up...

  • Page 163: General Description

    50–pin ribbon cable and four DB–25 connectors. The circuit pack is totally passive, containing connectors only and no active circuitry. All EIA interface leads are supported, whether for synchronous or asynchronous operation. DPP Card Replacement Guide BCS35 and up...

  • Page 164: Replacing The Four-Channel Comm Pack

    148 Four–channel communication circuit pack The Four–channel circuit pack provides the following functions: • up to four channels of EIA RS–232 compatible serial interface (DTE interface) • two channels, jumper–selectable, between Automatic Dial–up Unit interface (unused) to modem/telephone line and serial channels •...
  • Page 165 Pull the rear panel away from the Put the two panels in a safe cabinet. Remove the front panel of place to prevent bending and the A chassis to improve convection scratching. cooling, if necessary. DPP Card Replacement Guide BCS35 and up...
  • Page 166 150 Four–channel communication circuit pack Remove the MMI cable. J2 and J3 on "A" chassis. Remove the hex–head screws Use an offset ratchet driver for attaching the four–channel limited clearance. communication circuit pack. Remove the four–channel comm Gently remove the pack from circuit pack.
  • Page 167 Notes: 1. When used with digital data lines, make sure this pack is release 03 or later. 2. Jumpers J6, J7, J8, J9, and J10 may be on the reverse side of some printed circuit assemblies. DPP Card Replacement Guide BCS35 and up...
  • Page 168 152 Four–channel communication circuit pack Table 16–1 Four–channel communications circuit pack (A17) options – part number: NT6M85AA Device type Position/setting Function Setting (number) Factory On–site Jumper 2–3 ADU Operation* 1–2 Must be (J6) same as 1–2 No ADU operation factory (EIA on chan 1 &2) setting.
  • Page 169 ......... .. DPP Card Replacement Guide BCS35 and up...

  • Page 171: Power Supplies

    Only remove the –48 V dc fuse from the power supply to power down the DPP in an emergency. Leave the disk drives untouched for at least 30 seconds after power down since vibration during power down may damage the disk drive. DPP Card Replacement Guide BCS35 and up...

  • Page 172: Dpp System Fuses

    156 Power supplies Figure 17–1 DPP power supply assembly 8.5V Retainer Screw DPP system fuses DPP fuses are located on the front panel of the DPP power supply. The power supply has the –48 V dc circuit fused. A GMT–type fuse is used. These fuses have a spring–loaded colored flag which opens when the fuse is blown.

  • Page 173: Replacing Power Supply For Maintenance

    NT part No: A0109762 Replacing power supply for maintenance If removing a power supply, follow Procedure 17–1. The only tool needed is a small flat–blade screwdriver. If necessary, have replacement fuses on hand. DPP Card Replacement Guide BCS35 and up...
  • Page 174 158 Power supplies Procedure 17–1 Power supply replacement Step Description Notes Remove the front panel of the DPP. Put it Loosen the four captive screws on the in a safe place to avoid damage. Remove left and right sides of the front panel; only the top panel if you are changing the A carefully remove the front panel.
  • Page 175 Switch and Status Panel switches to the selected side (processor) and turning the mode insert switch on the Switch and Status Panel. This condition does not exist when both processors are powered up together. DPP Card Replacement Guide BCS35 and up...
  • Page 177 DMS–100s. Bits per second Central Office A switching office arranged for terminating subscriber lines and provided with equipment and trunks for establishing connections to and from other switching offices. Central Control Complex DPP Card Replacement Guide BCS35 and up...
  • Page 178 18–162 List of terms Comprises all Central Control functions of the DMS–100. It consists of the Central Message Controller, CPU, and Data Store. Central Processor Unit Counter Timer Circuit A circuit on the DPP CPU circuit pack that handles vectored interrupts from various devices within the DPP that request access to the data bus for data transfer.
  • Page 179 End of Tape A signal sent from an MTD to its host indicating that no more data should be recorded on the currently loaded tape. DPP Card Replacement Guide BCS35 and up...
  • Page 180 18–164 List of terms EPROM Erasable Programmable Read Only Memory A read–only memory in which stored data can be erased by ultraviolet light and reprogrammed. Electro–Static Discharge The passing of electrical energy from a statically charged body to a discharged body or ground. Statically charged bodies may store several thousand volts, which has potential to severely damage or even destroy static sensitive electronic components such as Metal Oxide Semiconductor devices.
  • Page 181 Circuitry in the DPP that passes data from the DPP to external devices. The DPP employs four such circuits in its serial I/O circuit pack that provides communications paths between the DPP and DMS–100/DPP maintenance interface, the DPP EAT, and the remote polling center link (BCS25–26). DPP Card Replacement Guide BCS35 and up...
  • Page 184 Northern Telecom. Except as specifically authorized in writing by Northern Telecom, the holder of this document shall keep the information contained herein confidential and shall protect same in whole or in part from disclosure and dissemination to third...

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