Printronix P9012 Maintenance Manual
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Printronix P9012 Maintenance Manual

Printronix P9012 Maintenance Manual

Multifunction line printer
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P/N 132305–001, Rev E
P9012 Multifunction Line Printer
Maintenance Manual

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Summary of Contents for Printronix P9012

  • Page 1 P/N 132305–001, Rev E P9012 Multifunction Line Printer Maintenance Manual...
  • Page 2 Classe A dans le règlement sur le brouillage radio–électrique publié par le Ministère des Communications du Canada. Printronix, Inc. makes no representations or warranties of any kind regarding this material, including, but not limited to, implied warranties of merchantability and fitness for a particular purpose. Printronix, Inc. shall not...

  • Page 3: Table Of Contents

    Table of Contents Overview Chapter Contents ..........1–1 About This Manual .
  • Page 4 Hammer Driver PCBA ......... . 2–25 Hammer Bank and Shuttle Mechanics/MPU .
  • Page 5 Alignments and Adjustments Chapter Contents ..........5–1 Alignments and Adjustments .
  • Page 6 Cam Wick ........... . 6–40 Magnetic Pickup Unit .

  • Page 7: Overview

    Overview Chapter Contents About This Manual ........1–2 Description .

  • Page 8: About This Manual

    This manual covers alignments and adjustments, preventive and corrective maintenance, basic troubleshooting, and principles of operation. This manual does not explain how to configure or operate the P9012 printer. That information is in the P9012 User’s Manual. The User’s Manual therefore supplements this manual.

  • Page 9: Printing Conventions

    Related Documents For additional information about printer configuration and operation, and optional interfaces, refer to the following documents: P9012 Multinational User’s Manual (p/n 133397–001) PI 5225 Interface User’s Reference Manual (p/n 140351–001) PI 3287 Interface User’s Reference Manual (p/n 108174–001) IGP–100/200/400 User’s Manual (p/n 141332–001)

  • Page 10: Description

    Description The P9012 Printer (Figure 1–1) is a highly reliable, multi–function dot matrix line printer. In addition to basic functions, the printer can produce correspondence quality print for near letter quality (NLQ) printing requirements, draft print for higher speed, and character attributes (dynamic character generation) for wider application compatibility.

  • Page 11: Standard Features

    Standard Features Extra Quiet Operation P–Series or Serial Matrix Protocols Raster Plot and Bit Image Graphics Dynamic Character Generation Selectable Pitch Automatic Underline Shadow Print Superscript Printing Elongated Print Subscript Printing Expanded Print Selectable Forms Length Nonvolatile Electronic Vertical Formatting Resident International Character Sets Resident OCR–A and OCR–B Character Sets Downloadable Character Sets...

  • Page 12: Control Panel Switches And Indicators

    Control Panel Switches and Indicators The P9012 operator control panel switches and indicators are illustrated in Figure 1–2 and described in Table 1–1. Refer to the P9012 User’s Manual for details on control panel operation. Status Lamps Message Display ON LINE...

  • Page 13: Control Panel Switches And Indicators

    Table 1–1. Control Panel Switches and Indicators Switch / Indicator Function Except for ON LINE, all switches function only when the printer is off line. Status lamps Illuminate when the printer is on line, flash alternately to indicate a fault condition, and remain off when the printer is off line.

  • Page 14: Mechanical Controls

    Press to display and select the current print mode. switch F/L switch Press to display and select the current forms length. Mechanical Controls P9012 mechanical controls are described in Table 1–2 and illustrated in Figure 1–3. Table 1–2. Mechanical Controls Item No. Control or (Figure 1–3)
  • Page 15 1. Forms Thickness Adjustment Lever 2. Forms Thickness Scale/Pointer 3. Horizontal Adjustment Knob 4. Tractor Lock (2) 5. Vertical Adjustment Knob 6. Tractor (2) Figure 1–3. Mechanical Controls Overview 1–9...

  • Page 16: I/O Panel

    I/O Panel The P9012 printer supports serial and parallel interfaces. Figure 1–4 shows the I/O panel on the rear of the printer. 1. RS–232 Serial Connector 2. AC On/Off Switch 3. AC Power Connector 4. Dataproducts Parallel Connector 5. Centronics Parallel Connector Figure 1–4.

  • Page 17: Tools, Test Equipment, And Supplies

    Tools, Test Equipment, and Supplies The tools, test equipment, and supplies required for field level maintenance of P9012 printers are listed in Table 1–3. Table 1–3. Tools, Test Equipment, and Supplies Item Part Number Recommended Item Adjustable Wrench — Utica 91–4C Diagonal Cutters —...
  • Page 18 Item Part Number Recommended Item Shims, Counterweight 101564–001 — Shims, Shuttle Assembly 103422–001 — Socket, 7/16 in., 3/8 in. Drive — — Soldering Iron and Tips — — X–acto Knife and Blades — — 1–12 Overview...

  • Page 19: Principles Of Operation

    Principles of Operation Chapter Contents Scope ..........2–2 Purpose .

  • Page 20: Scope

    Appendix C. Purpose The P9012 printer is a computer output device. It receives data from a host computer and provides hard copy text or graphics. The hard copy is composed of an array of dots. In the case of text, these dots are arranged in a matrix to produce characters.

  • Page 21: Matrix Printing

    Matrix Printing The Dot Matrix In order to generate characters from dots, the dots must be arranged properly. The imaginary grid on which the dots are positioned is referred to as the matrix. When in the data processing print mode, for spacing of six lines per inch there are 12 dot rows from the top of one character line to the top of the next (Figure 2–1 and Figure 2–2).
  • Page 22 UPPERCASE LOWERCASE UNDERLINE (REFERENCE) WITH DESCENDER Figure 2–2. Typical Characters WITH UNDERLINES WITHOUT UNDERLINES DOT COLUMN DOT COLUMN DOT ROW DOT ROW ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ ’ PRINTED WITH ’ UNDERLINE UNDERLINE Figure 2–3. Elongated Characters 2–4 Principles of Operation...

  • Page 23: The Hammer Bank

    The Hammer Bank In order to use matrix printing, you must have a method to print the required dots. The P9012 uses the hammer bank. The hammer bank contains a number of print hammers mounted on a shuttle that can move back and forth horizontally. The shuttle prints a full line of dots during each cycle of back and forth motion.
  • Page 24 DE–ENERGIZED ENERGIZED PERMANENT MAGNET COIL COIL COIL COIL HAMMER HAMMER SPRING NORMAL (RETRACTED) STATE ACTIVATED (RELEASE) STATE Figure 2–5. Print Hammer Action 2–6 Principles of Operation...

  • Page 25: Character Generation

    1 HAMMER 1 HAMMER PRINT SPAN PRINT SPAN USED FOR LOWERCASE DESCENDER ONLY USED FOR UNDERLINE AND LOWERCASE DESCENDER NOTE: The P9012 shuttle sweeps through 1.5 character positions at 10 cpi. Figure 2–6. Standard Character Formation Principles of Operation 2–7...
  • Page 26 SUCCESSIVE HAMMER STROKES PER SCAN DOT COLUMN SHUTTLE 1 3 5 3 5 7 1 3 5 7 9 SCAN EVEN COLUMN DOT CENTERS WITHIN THE PRINTED CHARACTER AREA AND CHARACTER SPACE HAMMER POSITIONS ARE NOT ILLUSTRATED IN THIS DIAGRAM. NOTE: = DOT = NO DOT WHERE HAMMER HAS BEEN...

  • Page 27: Printer Functional Elements

    Printer Functional Elements (Figure 2–8 and Figure 2–9) The printer is made up of the following functional elements: Control Panel Data Control Unit (DCU) PCBA Mechanism Control Unit (MCU) PCBA Mechanism Driver PCBA Hammer Driver PCBA(s) Hammer Bank and Shuttle Mechanics/Magnetic Pickup (MPU) Power Supply PCBA(s) Ribbon Deck Paper Transport...
  • Page 28 PLATEN OPEN SWITCH TRACTOR (Paper Transport) CONTROL PANEL PAPER OUT SWITCH SHUTTLE MOTOR / MPU (Shuttle Mechanics) RIBBON DECK HAMMER BANK / SHUTTLE PCBAs Figure 2–8. Printer Functional Elements 2–10 Principles of Operation...
  • Page 29 CONTROL BEEPER PANEL FROM MECH DRIVER FROM P/S +5V GND +36V GND –12V FAULT/STATUS DATA MECHANISM –12V MOTOR DRIVER SERIAL CONTROL CONTROL DCU MESSAGE READY, READ +12V STATUS FAULT CIRCUITS MESSAGE FAULTS PAPER TRANSPORT HOST I/O DRIVE DATA SENSE SHUTTLE DRIVE DO–D7 CONTROL RIBBON DRIVE...

  • Page 30: Control Panel

    The control panel processes and sends switch closure information to the DCU. It receives information on setting up the alphanumeric display as well as status information. For a detailed discussion of panel operation, refer to the P9012 User’s Manual. Status Lamps Message Display...
  • Page 31 CONTROL PANEL ASSEMBLY SWITCH CLOSURES SW CLOSURES DATA PANEL CONTROL PANEL PCBA CONTROL STATUS Figure 2–11. Control Panel Block Diagram Principles of Operation 2–13...

  • Page 32: Data Control Unit (Dcu) Pcba

    Data Control Unit (DCU) PCBA (Figure 2–12 and Figure 2–13) The data control unit (DCU) PCBA begins the printing process by receiving data through the host interface (J1, J2). Three interfaces are available on the DCU card: the Centronics and Dataproducts parallel interfaces (J2), and an RS–232 compatible serial interface (J1) running up to l9,200 baud.
  • Page 33 DCU PCBA (Slot 3) Serial I/O Parallel I/O TP4 (+12VDC) TP3 (–12VDC) TP2 (VCCP5) TP1 (GND) Figure 2–12. Data Control Unit (DCU) PCBA Principles of Operation 2–15...
  • Page 34 ADDRESS DECODE CLOCK 8MHZ GENERATION 8/4/2 MHZ (23) ADDR ADDRESS BUS NRST 2MHZ 4MHZ 68000 ARBITRATION EPROM CONTROL 160K x 16 RESET RESET GENERATION 370 ms DATA BUS DATA (16) HALT CNTLS DECODE CNTL BUFFER INTA ADDRESS BUS DMA HNDSHK DTACK DTACK GENERATOR...
  • Page 35 MISC. CONTROL SIGNALS ADDRESS BUS A0, A1 (23) NVRAM 2K x 8 DATA BUS (16) STATUS REGISTER S/P – P/S SHIFT REGISTER PDATA FRONT PANEL NPFAULT REGSEL LOGIC NENABLE NSWITCH NPCLK NPLOAD NLOAD NSWITCH HAMMER DATA CONTROL ADDRESSABLE PARALLEL AND SERIAL I/O CONTROL LATCHES ADDRESS OUTPUT...

  • Page 36: Mechanism Control Unit (Mcu) Pcba

    Mechanism Control Unit (MCU) PCBA (Figure 2–14 and Figure 2–15) The mechanism control unit (MCU) PCBA controls the printer mechanism through signals sent to the hammer driver and mechanism driver PCBAs. The board is controlled by a microprocessor. It contains three sections of memory, timers and control ports in order to control hammer firing, shuttle motion, ribbon movement, and paper feed.
  • Page 37 MCU PCBA (Slot 4) TP3 (PPR BUSY) TP4 (SDIR) TP1 (+5VDC) TP2 (GND) Figure 2–14. Mechanism Control Unit (MCU) PCBA Principles of Operation 2–19...
  • Page 38 !/O AND ADDRESS DECODE CLOCK 6MHZ GENERATION 6/3 MHZ BUFFERED ADDRESS BUS (16) (16) ADDR NRST 3MHZ EPROM Z–80 36K X 8 RESET RESET GENERATION BUFFERED DATA BUS DATA 750 ms CNTLS DECODE CNTL BUFFER INTA MCU REC MCU / DCU COMMAND PORT 4 X 8 MCU/R: DCU/W BD0–7...
  • Page 39 BUFFERED ADDRESS BUS SRAM 16K X 8 BUFFERED DATA BUS AIRFLT FAULT MCU REC STATUS NFLT REGISTER NPLAO MECH DRIVER NPADO NRIBFLT D0–7 RIBBON D0–3 D4–7 CONTROL PF1/2 MECH BD0–3 DRIVER PAPER FEED PF3/4 BD0–3 DCU I/F COUNTER FIRE CONTROL FIRE 0,1,2 LOGIC NHCK...

  • Page 40: Mechanism Driver Pcba

    Mechanism Driver PCBA (Figure 2–16 and Figure 2–17) The mechanism driver PCBA contains those circuits required to drive the various motors of the printer mechanism. These driver circuits are under control of the MCU. The mechanism driver PCBA also produces, by use of switching regulators, the 12 V and +5 VDC required by the MCU and DCU.
  • Page 41 Mech Driver PCBA (Slot 5) Note: All voltages shown are in VDC. TP11 (PF1 CHOP) TP10 (VREF) TP23 (SHT PROP) TP9 (PF2 CHOP) TP22 (HES A) TP8 (PPF RAMP) TP7 (+5V) TP6 (+5 RTN) TP25 (+58V) TP24 (SHT INTEG) TP5 (+12V) TP21 (HES RET/–12V) TP4 (+63V) TP3 (+36V)

  • Page 42: Mechanism Driver Pcba

    +36V RIB MOV LEFT RIB. MTR RIBBON GUIDES DC MOTORS DRIVER RIB TEN RIGHT RIB. MTR. PCBA PF1/PF2 PAPER FEED PAPER FEED STEPPER MOTOR NRUN1/NRUN2 MOTOR DRIVERS +63VDC POWER PAPER +36V SUPPLY MOTION DETECT AMPLIFIER NPAPO PAPER TRANSPORT FAULT NRIBFLT RIBBON DRIVE FILE DETECT...

  • Page 43: Hammer Driver Pcba

    Hammer Driver PCBA (Figure 2–18 and Figure 2–19) Each of the print hammers is controlled by electromagnetic coils, a driver, and a logic circuit which, among other functions, controls the energizing of the coils. The hammer logic circuits perform the following functions: Convert serial data bits on the COM line into parallel data bits.
  • Page 44 Hammer Driver PCBAs (1–3) Note: All voltages shown are in VDC. TP10 (–8V) TP1 (+5V) TP7 (–12V) TP8 (OD) TP2 (COM1) TP3 (–HCK) TP6 (+36V) TP4 (NHSCB) TP5 (–HRS) TP9 (COMOUT) Figure 2–18. Hammer Driver PCBA 2–26 Principles of Operation...
  • Page 45 TEST TIMING +36V FAULT MONITOR #1 FAULT MONITOR #2 HAMMER DRIVER (H/D) +12V RTN –12V REGULATOR –12V DARLINGTON DRIVERS (33) HAMMER OUTPUT +36V DISABLE CIRCUITS DATA LATCHES (33) NHCK OPTO– COM IN ISOLATORS NHSC COM IN SHIFT REGISTER (33) NHSC OPTO–...

  • Page 46: Hammer Bank And Shuttle Mechanics/Mpu

    Hammer Bank and Shuttle Mechanics/MPU (Figure 2–20) Hammer Bank Assembly/Shuttle Operation of the hammer bank and shuttle is described on page 2–5. Magnetic Pickup Unit (MPU) Printing is synchronized with shuttle movement by the magnetic pickup (MPU) signal. The magnetic pickup, located next to the flywheel timing disk, is so oriented that timing signals relate precisely to the shuttle position.
  • Page 47 resulting MPU signal is synchronized with the timers (CLK) and applied to print synchronizing logic on the MCU PCBA. Typical signal levels received from the magnetic pickup are: SYNC: 2.5 to 5.5 Vpp RESYNC: 4 Vpp minimum SHUTTLE MOTOR (Shuttle Mechanics) HAMMER BANK/SHUTTLE ASSEMBLY Figure 2–20.

  • Page 48: Power Supply

    NOTE: As shown in Figure 2–21, the power supply contains a jumper that must be configured for the type of P9012 printer in use. For printers that contain an Autotap board, place the jumper in the “SHORT”...
  • Page 49 Power Supply PCBAs (1–3) SHORT OPEN Figure 2–21. Power Supply PCBA Principles of Operation 2–31...

  • Page 50: Ribbon Deck

    Ribbon Deck (Figure 2–22 through Figure 2–24) The ribbon deck assembly contains two dc servomotors that move the ribbon continuously while there is shuttle action. One motor acts as the driver, drawing the ribbon against opposing torque exerted by the other motor. When a length of metal tape at either ribbon end is detected by the ribbon guide at either side of the shuttle, the two motors exchange roles and ribbon travel is reversed.
  • Page 51 Figure 2–23. Ribbon Deck +27V +1V TO +5V +17.8V – – R F1 R F2 +36V R IN1 R IN2 +3.7V R S1 R S2 (LOW) END OF (VOLTAGES ARE AS INDICATED LATCH RIBBON WHEN RIBBON IS RUNNING FROM (HIGH) DETECTORS RIGHT TO LEFT) Figure 2–24.

  • Page 52: Paper Feed Control Circuits

    Paper Feed Control Circuits (Figure 2–25 and Figure 2–26) The paper feed motor contains two pairs of coils, driven in sequence. As the electromagnetic detent locking the rotor is released, the rotor is advanced one increment, and the detent is set again. One pair of coils is driven by the push–pull signal, PFM1/PFM2, and the other pair by PFM3/PFM4.
  • Page 53 TRACTORS (PAPER TRANSPORT) PAPER FEED MOTOR Figure 2–26. Paper Feed Components Principles of Operation 2–35...

  • Page 54: Platen Open/Paper Out Switches

    Platen Open/Paper Out Switches (Figure 2–27) These switches signal the mechanism driver that the printer is out of paper or the platen has been left open. When either signal is detected, paper transport is disabled and the ribbon loses tension. The signal faults are reported to the control panel from the MCU to the DCU.

  • Page 55: Safety Circuits

    Safety Circuits (Figure 2–28) Excessive current and overheating can damage coils and hammer drivers in either of the following situations: Current turned on when not needed to release hammer springs. Current left on after hammer spring release. Three safety circuits on the hammer driver board prevent excessive current by disabling the latch output drivers under control of the OE signal.

  • Page 56: Normal Operation

    Normal Operation (Figure 2–29) Character Printing During one cycle of normal operation, the printer is set up and put online by the operator, using the control panel. Host computer data is then read into the data input buffer. ASCII data from the input buffer is compared to tables stored in memory to determine the matrix locations to be printed for each character and build the dot image buffer.
  • Page 57 FRONT PANEL PRINTER SETUP PRINTER ENABLE (DCU) INPUT DATA (DCU) BUFFER HOST CONTROLLED BY SOFTWARE (IN DYNAMIC RAM) CONNECTION EXECUTED BY HARDWARE ASCII DATA (DCU) INPUT DATA THROUGH DMA CONTROLLER 68B44 (DCU) SELF–TEST BUILD DOT IMAGE BUFFER (DIB) SELECT FROM FROM LOOK UP TABLES IN FONT FRONT PANEL PUT INTO DYNAMIC RAM (DCU)
  • Page 58 2–40 Principles of Operation...

  • Page 59: Scheduled Maintenance

    Scheduled Maintenance Chapter Contents Preventive Maintenance Checks and Services (PMCS) ..3–2 Inspecting the Printer ....... . . 3–3 Cleaning the Printer .

  • Page 60: Preventive Maintenance Checks And Services (Pmcs)

    Preventive Maintenance Checks and Services (PMCS) Perform Preventive Maintenance Checks and Services (PMCS) every three months or after every 250 hours of operation, whichever comes first. Do these checks more often if the printer is used for heavy–duty, continuous printing or if it is located in a dusty area. PMCS are listed in Table 3–1.

  • Page 61: Inspecting The Printer

    Inspecting the Printer Visually inspect the printer using Table 3–2 as a guide. Correct any condition found during inspection that could affect printer performance or reliability. Table 3–2. Physical Inspection Item(s) to Inspect Procedure Cabinet, base, frame Check for damage, cracks, breaks, dents, gouges, scratches, warpage, rust, corrosion, and proper finish.

  • Page 62: Cleaning The Printer

    Cleaning the Printer CAUTION Do not use abrasive cleaners, particularly on the window. Do not drip water into the printer; damage to equipment will result. When using spray solutions, do not spray directly onto the printer; spray the cloth. Exterior of Cabinet 1.
  • Page 63 1. Forms Thickness Adjustment Lever 2. Lock Tab (2) 3. Ribbon Spool (2) 4. Ribbon Hub (2) 5. Tractor (2) 6. Hammer Bank 7. Base Casting 8. Splined Shaft 9. Ribbon Guide 10. Paper Motion Detector 11. Ribbon Path 12. Platen 6 (under cover) Figure 3–1.

  • Page 64: Hammer Bank Assembly

    9. Open the left tractor (5) and clean the paper motion detector (10) with a soft brush. 10. Clean the ribbon path (11) with a soft brush. 11. Inspect the platen (12). If necessary, wipe with a cloth dampened with alcohol to remove ink or dirt.
  • Page 65 1. Forms Thickness Adjustment Lever 2. Lock Tab (2) 3. Ribbon Spool (2) 4. Ribbon Hub (2) 5. Right Tractor (6) 6. Ribbon Deck 7. Hammer Bank 8. Ribbon Mask 9. Hammer Bank Cover 10. Platen 11. Hammer Springs 12. Hammer Tips Figure 3–2.
  • Page 66 8. Install the ribbon deck as described on page 6–8 of Chapter 6, Replacement Procedures. 9. Install the ribbon spools on the ribbon hubs. Replace paper. 10. Close the cover and return the printer to normal operation. 3–8 Scheduled Maintenance...

  • Page 67: Troubleshooting

    Troubleshooting Chapter Contents Introduction ......... 4–2 Fault Messages .

  • Page 68: Introduction

    Introduction This chapter contains procedures for troubleshooting printer malfunctions. You must operate the printer to check printer performance after correcting problems, so have the User’s Manual at the printer site. Although diagnostic self–test procedures are covered in this chapter, basic printer operation is not covered.

  • Page 69: Operator Correctable Faults

    IMPORTANT Test the printer after each corrective action. Stop maintenance when the symptom disappears. Always press the CLEAR switch after correcting a fault indicated by a fault message. Operator Correctable Faults Printer problems that the operator can correct are self–explanatory and appear on the second line of the display: CHANGE RIBBON PLATEN OPEN...

  • Page 70: Field Service Required

    Field Service Required Printer problems requiring the attention of the customer service representative also appear on the second line of the display and are indicated by an asterisk (*) next to the message: FONT PROM * HAMMER DR PCB X * ( X = 1, 2, or 3 ) NOVRAM * PROGRAM PROM * If HAMMER DR PCB X * appears on the display, printer power will...

  • Page 71: Change Ribbon

    CHANGE RIBBON Instruction Indication Check for fault message CHANGE RIBBON Replace the — when using the message. ribbon. RibbonMinder feature. COOLING Instruction Indication Check for inoperative blower COOLING message. Replace one at a — assembly, air flow sensor, or time, in the MCU PCBA.
  • Page 72 HAMMER DR PCB X * Instruction Indication Set power switch to O (OFF). HAMMER DR PCB X * Step 2. Return printer to Wait 5 seconds. Set power message. normal operation. switch to 1 (ON). Press the CLEAR switch. HAMMER DR PCB X * Step 3.

  • Page 73: Paper Jam

    Go to step 7. Set the paper motion sensor PAPER JAM message. Return printer to fault setting to DISABLE. See normal operation. the P9012 User’s Manual . Check paper feeding as the PAPER JAM message. Check the tractors Return printer to printer prints.

  • Page 74: Paper Out

    PAPER OUT Instruction Indication Load paper. — Step 2. — Run a diagnostic self–test PAPER OUT Replace paper out Return printer to (page 4–14). message. switch assembly normal operation. (page 6–66). PLATEN OPEN Instruction Indication Load paper. — Step 2. —...
  • Page 75 PROGRAM PROM * Instruction Indication Set power switch to O (OFF). PROGRAM PROM * Step 2. Return printer to Wait 5 seconds. Set power message. normal operation. switch to 1 (ON). Press the CLEAR switch. PROGRAM PROM * Step 3. Return printer to message.
  • Page 76 SHUTTLE STALL Instruction Indication Check that forms thickness Forms thickness Step 2. Readjust the adjustment lever is not adjustment lever is set setting of the closed too tightly; this can correctly. forms thickness jam the ribbon and shuttle. adjustment lever. Go to step 2.

  • Page 77: Symptoms Not Indicated By Fault Messages

    Symptoms Not Indicated by Fault Messages Troubleshoot malfunctions not indicated by fault messages using standard fault–isolation techniques: 1. Debrief the operator for a general description of the problem. 2. Verify the fault by running diagnostic self–tests or replicating conditions reported by the user. 3.
  • Page 78 NO DISPLAY Instruction Indication Remove the right side panel Step 2. — — (page 6–4). Inspect control panel ribbon Pins are damaged. Straighten bent Step 3. cable connector on card cage pins on card cage logic backplane PCBA for logic backplane bent or broken pins.
  • Page 79 PRINTING INCORRECT DATA Instruction Indication Verify printer is plugged into Power cable installed Step 2. Connect printer to correct power source. (See correctly to proper correct power User’s Manual .) source. source. Inspect for debris that could Metallic debris. Remove debris. Step 10.

  • Page 80: Diagnostic Self-Tests

    Diagnostic Self–Tests Run diagnostic self–tests to check the print quality and operation of the printer. The self–tests are listed below. NOTE: Included with the description of each diagnostic test is a list of items that may require field replacement or adjustment if the test produces a bad print pattern.
  • Page 81 All H’s A pattern of all uppercase letter H’s useful for detecting missing characters or dots, smeared characters, or improper phasing. Ribbon Hammer bank cover MPU Sensor Hammer spring Hammer coil All Underlines An underline pattern useful for identifying hammer bank misalignment.

  • Page 82: Running The Self-Tests

    Running the Self–Tests P9012 printers include various self–test functions. Use the self–test as needed to determine if the printer is functioning normally. To run the self–tests: 1. Place the printer off line and raise the printer cover. 2. Press MENU DOWN; repeatedly press NEXT or PREV until “DIAGNOSTICS”...

  • Page 83: Hex Code Printout

    Hex Code Printout The hex code printout (often called a “hex dump”) is useful for debugging when troubleshooting printer data reception problems. Hex dumps list ASCII character data received from the host with the corresponding two–digit hexadecimal code. Printable characters print their assigned symbol; nonprintable characters are indicated with a period symbol.
  • Page 84 4–18 Troubleshooting...

  • Page 85: Alignments And Adjustments

    Alignments and Adjustments Chapter Contents Alignments and Adjustments ......5–2 Ribbon Tracking Check and Adjustment .

  • Page 86: Ribbon Tracking Check And Adjustment

    2. Set the forms thickness adjustment lever (1) to any position between “A” and “B.” Make sure no error indications appear. 3. Refer to the P9012 User’s Manual and command a shuttle/ribbon self–test. Shuttle action and ribbon motion should begin.
  • Page 87 1. Forms Thickness Adjustment Lever 2. Right Ribbon Guide 3. Right Guide Skid (2) 4. Screw (2) 5. Washer (2) 6. Guide Post Figure 5–1. Ribbon Tracking Check and Adjustment Alignments and Adjustments 5–3...

  • Page 88: Ribbon Hub Height Adjustment

    Ribbon Hub Height Adjustment (Figure 5–2) 1. Open the printer cover. 2. Squeeze the lock tabs (1) and remove the ribbon spools (2) from the hubs (3). 3. Check the distance between the bottom of the hub and the gearbox (4). The hub should just clear the gearbox.
  • Page 89 1. Lock Tab (2) 2. Ribbon Spool (2) 3. Hub (2) 4. Gearbox 5. Setscrew Figure 5–2. Ribbon Hub Height Adjustment Alignments and Adjustments 5–5...

  • Page 90: Setting Shuttle And Counterweight Preload

    Setting Shuttle and Counterweight Preload (Figure 5–3) NOTE: The preload of the shuttle and counterweight must be set when improper shuttling action or excessive rattle is detected, or whenever shuttle drive components have been replaced. 1. Remove the ribbon deck assembly as described on page 6–8 of Chapter 6, Replacement Procedures.
  • Page 91 1. Force Gauge 2. Counterweight 3. Feeler Gauge 4. Cam 5. Right Cam Follower 6. Left Cam Follower 7. Cam Follower Yoke 8. Dust Barrier Figure 5–3. Setting Shuttle and Counterweight Preload Alignments and Adjustments 5–7...
  • Page 92 10. Push the force gauge horizontally to the left. Note the gauge indication when the feeler gauge comes loose. NOTE: If springs have been replaced, set the preload at the high end of range, otherwise set at the low end. a.
  • Page 93 1. Force Gauge 2. Counterweight 3. Feeler Gauge 4. Cam 5. Right Cam Follower 6. Left Cam Follower 7. Cam Follower Yoke 8. Dust Barrier Figure 5–3. Setting Shuttle and Counterweight Preload Alignments and Adjustments 5–9...

  • Page 94: Shuttle And Counterweight Spring Adjustment

    Shuttle and Counterweight Spring Adjustment (Figure 5–4) NOTE: Spring force adjustments may be made with or without a force gauge. The procedure on page 5–6 describes the use of a force gauge and is preferred over the following. NOTE: Although the following procedure is not recommended, it may be performed if excessive rattle is detected under the cam cover and it is not possible to perform the procedure on page 5–6.
  • Page 95 1. Screw (2) 2. Cam Cover 3. Gasket 4. Shuttle Spring 5. Counterweight Spring 6. Counterweight 7. Yoke 8. Shim 9. Screw 10. Shim 11. Casting 10 (hidden) Figure 5–4. Shuttle Spring Force Adjustment Alignments and Adjustments 5–11...
  • Page 96 7. Install a counterweight spring shim as follows: NOTE: More than one shim may be required to obtain the desired effect. a. Loosen screw (9) about three turns. b. With the screwdriver, press in on the loosened screw to create space for a shim (10).
  • Page 97 1. Screw (2) 2. Cam Cover 3. Gasket 4. Shuttle Spring 5. Counterweight Spring 6. Counterweight 7. Yoke 8. Shim 9. Screw 10. Shim 11. Casting 10 (hidden) Figure 5–4. Shuttle Spring Force Adjustment Alignments and Adjustments 5–13...

  • Page 98: Hammer Spring Retensioning

    Hammer Spring Retensioning (Figure 5–5) Print Too Light 1. Perform steps 1 and 2 of the hammer spring removal procedure, as described on page 6–22 of Chapter 6, Replacement Procedures. This will place the hammer bank in the service position. 2.
  • Page 99 1. Hammer Spring 2. Pole Pin 3. Hammer Tip PRINT TOO LIGHT PRINT TOO DARK Figure 5–5. Hammer Spring Retensioning Alignments and Adjustments 5–15...

  • Page 100: Hammer Tip Alignment

    Hammer Tip Alignment (Figure 5–6) 1. Remove the ribbon deck assembly as described on page 6–8 of Chapter 6, Replacement Procedures. 2. Perform steps 1 and 2 of the hammer spring removal procedure, as described on page 6–22 of Chapter 6, Replacement Procedures. This will place the hammer bank in the service position.
  • Page 101 1. Screw 2. Hammer Spring 3. Alignment Tool (P/N 132266–001) Figure 5–6. Hammer Tip Alignment Alignments and Adjustments 5–17...

  • Page 102: Platen Gap

    Platen Gap (Figure 5–7) 1. Disconnect the AC power cord from the rear of the printer. Open the top cover. Remove paper from the printer. 2. Remove the ribbon deck assembly as described on page 6–8 of Chapter 6, Replacement Procedures. 3.
  • Page 103 1. Forms Thickness Lever 2. Feeler Gauge 3. Platen 4. Hammer Tip 5. Hammer Bank Cover 6. Set Screw (2) 4 (hidden) Figure 5–7. Platen Gap Adjustment Alignments and Adjustments 5–19...

  • Page 104: Magnetic Pickup Gap

    Magnetic Pickup Gap (Figure 5–8) NOTE: Unless otherwise directed, the MPU gap adjustment should be followed immediately by the MPU phasing adjustment (page 5–22). 1. Remove the right side panel as described on page 6–4 of Chapter 6, Replacement Procedures. 2.
  • Page 105 1. Cam Cover 2. Screw 3. MPU 4. Flywheel (Sync Windows) 5. Flat Feeler Gauge Figure 5–8. Magnetic Pickup Gap Adjustment Alignments and Adjustments 5–21...

  • Page 106: Magnetic Pickup Phasing Adjustment

    2. Load the printer with 14 7/8 inch wide, single–part paper. 3. Refer to the P9012 User’s Manual and command a 132 column self–test, printing all “H’s.” Observe the printout. The relative horizontal position of dots in alternate rows should be as shown below. If either incorrect condition is observed, position the MPU arm until the dots in succeeding rows are aligned horizontally to within 0.005 inch.
  • Page 107 1. Screw 2. MPU Arm Figure 5–9. Magnetic Pickup Phasing Adjustment Alignments and Adjustments 5–23...

  • Page 108: Shuttle Belt Tension

    Shuttle Belt Tension (Figure 5–10) Tension Check 1. Remove the right side panel as described on page 6–4 of Chapter 6, Replacement Procedures. 2. Loosen the two captive screws and remove the cam cover (1). 3. Observe the shuttle belt (2) and press down with your finger in the middle using about 2 oz.
  • Page 109 1. Cam Cover 2. Shuttle Belt 3. Nut (4) 4. Motor 0.21 in. DEFLECTION Figure 5–10. Shuttle Belt Tension Check and Adjustment Alignments and Adjustments 5–25...

  • Page 110: Paper Feed Belt Tension

    Paper Feed Belt Tension (Figure 5–11) Tension Check 1. Open the printer cover. 2. Remove two screws (1) and the belt guard (2). 3. Press down with your finger in the middle of the paper feed belt (3) using about 2 to 5 pounds of force. 4.
  • Page 111 1. Screw (2) 2. Belt Guard 3. Paper Feed Belt 4. Screw (4) 5. Motor 0.0625 in. DEFLECTION Figure 5–11. Paper Feed Belt Tension Check and Adjustment Alignments and Adjustments 5–27...

  • Page 112: Paper Motion Sensor

    (see the P9012 User’s Manual). 2. Load paper and run several top–of–form operations. 3. Refer to the P9012 User’s Manual and command a self test and run several pages. Watch for error messages. 4. If no error messages occur in steps 2 and 3, go to the next step. If an error message displays, follow the steps in “Position Check.”...
  • Page 113 1. Left Tractor 2. Nut 3. Washer 4. Clamp 5. Paper Motion Sensor 6. Cable 7. Capacitor C19 8. Mechanism Driver PCBA 7 (C19) Figure 5–12. Paper Motion Sensor Test and Position Check Alignments and Adjustments 5–29...
  • Page 114 5. Perform a final position check, as follows: a. Install paper in the tractors and close the gates. b. Connect an oscilloscope probe to junction of the C19 lead (7) closest to the edge on the mechanism driver PCBA (8); this is the input to the paper motion detector.
  • Page 115 1. Left Tractor 2. Nut 3. Washer 4. Clamp 5. Paper Motion Sensor 6. Cable 7. Capacitor C19 8. Mechanism Driver PCBA 7 (C19) Figure 5–12. Paper Motion Sensor Test and Position Check Alignments and Adjustments 5–31...

  • Page 116: Paper Out Detector

    Paper Out Detector (Figure 5–13) Check 1. With the paper loaded and the printer running, move the forms thickness adjustment lever to the fully open position. Paper motion should stop within two seconds. 2. With the paper loaded and the printer running, allow the paper to run out. Paper motion should stop within two seconds.
  • Page 117 1. Forms Thickness Lever 2. Shaft 3. Nylon Button 4. Platen 4 (hidden) Figure 5–13. Paper Out Detector Check and Adjustment Alignments and Adjustments 5–33...
  • Page 118 5–34 Alignments and Adjustments...

  • Page 119: Replacement Procedures

    Replacement Procedures Chapter Contents Replacement Procedures ....... 6–3 Tools, Test Equipment, and Supplies .
  • Page 120 Paper Motion Sensor ........6–62 Paper Out Switch .

  • Page 121: Tools, Test Equipment, And Supplies

    Replacement Procedures This chapter contains removal/installation procedures for components replaceable at the field service maintenance level. For the page location of removal/installation tasks, consult the table of contents on page 6–1. Printed circuit board assemblies (PCBAs) and the shuttle assembly are field replaceable and factory repairable.

  • Page 122: Side Panels

    Side Panels (Figure 6–1) NOTE: The replacement procedure for the right and left side panel is identical. Only the right side panel is discussed below. Removal 1. Raise the top cover. 2. Loosen two captive screws (1). 3. Lift the right side panel (2) off of the support pins (3) and remove the panel from the printer.
  • Page 123 1. Screw, Captive (2) 140593–001 2. Right Side Panel 140477–003 3. Support Pin (2) Figure 6–1. Side Panel Removal/Installation Replacement Procedures 6–5...

  • Page 124: Control Panel

    Control Panel (Figure 6–2) Removal 1. Disconnect the AC power cord from the rear of the printer. Open the top cover. 2. Remove the right side panel as described on page 6–4. 3. Disconnect connector P11 (1) from J11 on the card cage logic backplane (2).
  • Page 125 1. Connector 2. Card Cage Logic Backplane 133885–901 3. Cable Part of item 5 4. Screw (4) 5. Control Panel Assembly 131434–901 6. Bracket 131592–001 Figure 6–2. Control Panel Removal/Installation Replacement Procedures 6–7...

  • Page 126: Ribbon Deck

    Ribbon Deck (Figure 6–3) Removal 1. Open the front door of the printer and disconnect two connectors (1) from the bottom of the ribbon deck assembly (2). 2. Squeeze the lock tabs (3) and remove the ribbon spools (4) from the ribbon hubs (5).
  • Page 127 1. Connector (2) 2. Ribbon Deck Assembly 131883–903 3. Lock Tab (2) Part of item 3 4. Ribbon Spool (2) 5. Ribbon Hub (2) 102526–001 6. Screw (2) 140113–001 7. Retaining Clip (2) 101302–001 Figure 6–3. Ribbon Deck Removal/Installation Replacement Procedures 6–9...

  • Page 128: Ribbon Control Pcba

    Ribbon Control PCBA (Figure 6–4) Removal 1. Remove the ribbon deck assembly as described on page 6–8. 2. Remove two screws (1) and washers (2) from the ribbon deck covers (3). 3. Remove two ribbon deck covers from the ribbon deck housing (4). 4.
  • Page 129 1. Screw (2) 102786–605 2. Washer (2) 101526–002 3. Cover (2) 131694–001 4. Housing 132249–001 5. Connector J45 Part of item 19 6. Shunt Plug P45 Part of item 19 7. Connector Part of item 19 8. Connector Part of item 19 9.
  • Page 130 Installation CAUTION The ribbon control PCBA must be positioned properly in the ribbon deck housing. The PCBA sector with connectors RMJ1 and RGJ1 must be adjacent to the right side ribbon drive motor; the sector containing connectors RMJ2 and RGJ2 must be adjacent to the left ribbon drive motor.
  • Page 131 1. Screw (2) 102786–605 2. Washer (2) 101526–002 3. Cover (2) 131694–001 4. Housing 132249–001 5. Connector J45 Part of item 19 6. Shunt Plug P45 Part of item 19 7. Connector Part of item 19 8. Connector Part of item 19 9.

  • Page 132: Ribbon Drive Motor

    Ribbon Drive Motor (Figure 6–5) NOTE: The ribbon deck assembly contains two motors. Since the replacement procedure is the same for both motors, only one is described below. Removal 1. Remove the ribbon deck assembly as described on page 6–8. 2.
  • Page 133 1. Hub Screw 103677–009 2. Hub 102526–001 3. Motor, Ribbon Drive 131306–001 4. Screw 102786–605 5. Washer 101526–002 6. Cover 131694–001 7. Ribbon Deck Assembly 131883–903 8. Motor Cable Connector Part of item 3 9. Ribbon Control PCBA 132335–901 10. Screw (2) 101513–016 11.

  • Page 134: Blower And Airflow Assembly

    Blower and Airflow Assembly (Figure 6–6) Blower Removal 1. Disconnect connector (1). 2. Remove the hose clamp (6) and separate the airflow hose assembly (7) from the blower outlet boot (8). 3. Remove three screws (3), lockwashers (4), and washers (5). 4.
  • Page 135 1. Connector Part of item 9 2. Connector Part of item 7 3. Screw (3) 102998–001 4. Lockwasher (3) 102158–002 5. Washer (3) 101526–003 6. Hose Clamp 141532–001 7. Airflow Hose Assembly 133445–902 8. Outlet Boot Part of item 9 9.

  • Page 136: Shuttle Assembly

    Shuttle Assembly (Figure 6–7) Removal 1. Disconnect the AC power cord from the rear of the printer. Open the top cover. 2. Remove the ribbon deck assembly as described on page 6–8. 3. Set the forms thickness lever (1) to fully open. Remove paper. 4.
  • Page 137 1. Forms Thickness Lever 108652–002 2. Screw (2) 103258–001 3. Cam Cover 140269–001 4. Screw (6) 140113–001 5. Front Cover Plate 131580–001 6. Gasket 131492–001 7. Screw (2) 101541–057 8. Lockwasher (2) 102158–001 9. Dust Barrier Block 133442–001 10. Coil Connector Part of item 15 11.
  • Page 138 Installation 1. Engage the shuttle assembly over the alignment pin and slide the left end of the shuttle toward the rear of the printer. 2. Install and hand tighten two screws (11) and lockwashers (12) and one shoulder screw (13) and lockwasher (14). 3.
  • Page 139 1. Forms Thickness Lever 108652–002 2. Screw (2) 103258–001 3. Cam Cover 140269–001 4. Screw (6) 140113–001 5. Front Cover Plate 131580–001 6. Gasket 131492–001 7. Screw (2) 101541–057 8. Lockwasher (2) 102158–001 9. Dust Barrier Block 133442–001 10. Coil Connector Part of item 15 11.

  • Page 140: Hammer Spring

    Hammer Spring (Figure 6–8) Removal 1. Remove the ribbon deck assembly as described on page 6–8. 2. Place the hammer bank assembly in the service position, as follows: a. Set the forms thickness adjustment lever (1) to fully open. b. Remove the velcro pad (2) holding the wires. c.
  • Page 141 1. Forms Thickness Lever 108652–002 2. Velcro Pad 108297–001 3. Coil Connector Part of item 12 4. Screw (4) 101514–053 5. Coil Lead Bracket (2) 131937–001 6. Screw (2) 101514–017 7. Lockwasher (2) 102158–002 8. Washer (2) 101526–003 9. Screw (2) 101524–025 10.
  • Page 142 CAUTION Do not lubricate the bearing block assemblies or hammer bank shaft. 3. Clean the hammer bank cover with a soft cloth moistened with isopropyl alcohol. 4. Remove the hammer spring screw (19). Loosen the screw (20). 5. Slide the hammer spring (21) forward past the clamp plate (22) and remove.
  • Page 143 1. Forms Thickness Lever 108652–002 2. Velcro Pad 108297–001 3. Coil Connector Part of item 12 4. Screw (4) 101514–053 5. Coil Lead Bracket (2) 131937–001 6. Screw (2) 101514–017 7. Lockwasher (2) 102158–002 8. Washer (2) 101526–003 9. Screw (2) 101524–025 10.
  • Page 144 e. Place the shroud on the shuttle assembly. Install two screws (9) and washers (10) at the top loosely. Install two screws (6), lockwashers (7), and washers (8) loosely. Pull the shroud toward the front of the printer and tighten the top screws (9).
  • Page 145 1. Forms Thickness Lever 108652–002 2. Velcro Pad 108297–001 3. Coil Connector Part of item 12 4. Screw (4) 101514–053 5. Coil Lead Bracket (2) 131937–001 6. Screw (2) 101514–017 7. Lockwasher (2) 102158–002 8. Washer (2) 101526–003 9. Screw (2) 101524–025 10.

  • Page 146: Hammer Coil

    Hammer Coil (Figure 6–9) Removal 1. Remove the hammer spring at the faulty coil location as described on page 6–22. 2. Carefully separate the two coil leads (1) from the connector (2) as follows: CAUTION Do not move the connector releasing tabs any more than necessary to remove the leads.
  • Page 147 1. Coil Lead (2) Part of item 11 2. Connector 109687–001 3. Releasing Tab Part of item 4 4. Terminal Part of item 11 5. Screw (2) 105947–001 6. coil Lead Clamp 131937–001 7. Coil Lead Bracket 131934–001 8. Screw 101514–056 9.
  • Page 148 Installation 1. Position the coil over the pole pins and push straight down. The pins should protrude slightly through the coil. 2. Install the coil clamp plate, two screws (8), and washers (9). Make sure that the coil leads do not overlap each other under the clamp, and that the red and white leads are installed in their original positions.
  • Page 149 1. Coil Lead (2) Part of item 11 2. Connector 109687–001 3. Releasing Tab Part of item 4 4. Terminal Part of item 11 5. Screw (2) 105947–001 6. Coil Lead Clamp 131937–001 7. Coil Lead Bracket 131934–001 8. Screw 101514–056 9.

  • Page 150: Counterweight Assembly

    Counterweight Assembly (Figure 6–10) Removal 1. Disconnect the AC power cord from the rear of the printer. Open the top cover. 2. Remove the right side panel as described on page 6–4. 3. Loosen two captive screws (1) and remove the cam cover (2). 4.
  • Page 151 1. Captive Screw (2) 103258–001 2. Cam Cover 140269–001 3. Screw (6) 140113–001 4. Cam Cover Plate 131580–001 5. Gasket 131492–001 6. Screw (3) 101514–041 7. Lockwasher (3) 102158–002 8. Washer (3) 101526–003 9. Lockwasher 102158–002 10. Shim 101564–001 11. Screw 101514–041 12.
  • Page 152 Installation 1. While holding the spring and spring seat in place, install the counterweight. 2. Install three screws (6), lockwashers (7), and washers (8). 3. Install one screw (11), lockwasher (9), and washer (12). Leave the screw loose about three turns. 4.
  • Page 153 1. Captive Screw (2) 103258–001 2. Cam Cover 140269–001 3. Screw (6) 140113–001 4. Cam Cover Plate 131580–001 5. Gasket 131492–001 6. Screw (3) 101514–041 7. Lockwasher (3) 102158–002 8. Washer (3) 101526–003 9. Lockwasher 102158–002 10. Shim 101564–001 11. Screw 101514–041 12.

  • Page 154: Flywheel Assembly

    Flywheel Assembly (Figure 6–11) Removal 1. Remove the counterweight assembly as described on page 6–32. CAUTION Do not adjust the MPU clamp screw as it affects the MPU gap. 2. Back out the screw (1) about .25 inch. 3. Move the MPU arm (2) away from the flywheel (3) as far as the support plate (4) allows.
  • Page 155 1. Screw 101514–041 2. MPU Arm 101240–001 3. Flywheel Assembly 131865–903 4. Support Plate 101132–001 5. Screw (2) 101514–042 6. Lockwasher (2) 102158–002 7. Shuttle Belt 101768–003 8. Base Support 132288–001 9. Roll Pin 101556–005 10. Cam Part of item 3 11.
  • Page 156 Installation 1. Slip the flywheel assembly into the shuttle belt and position it in the base support as described in steps 2 and 3 below. 2. Slide the flywheel assembly back until the rear of the axle contacts the roll pin (9). 3.
  • Page 157 1. Screw 101514–041 2. MPU Arm 101240–001 3. Flywheel Assembly 131865–903 4. Support Plate 101132–001 5. Screw (2) 101514–042 6. Lockwasher (2) 102158–002 7. Shuttle Belt 101768–003 8. Base Support 132288–001 9. Roll Pin 101556–005 10. Cam Part of item 3 11.

  • Page 158: Cam Wick

    Cam Wick (Figure 6–12) Removal 1. Remove the flywheel assembly as described on page 6–36. 2. Remove one screw (1) and bracket (2). 3. Remove the cam wick (3) and discard. Installation 1. Using a heavy cloth moistened with isopropyl alcohol, remove all metal shavings from the flywheel assembly (4) and base support (5).
  • Page 159 1. Screw 140113–001 2. Bracket 132070–001 3. Cam Wick 132072–001 4. Flywheel Assembly 131865–903 5. Base Support 132288–001 Figure 6–12. Cam Wick Removal/Installation Replacement Procedures 6–41...

  • Page 160: Magnetic Pickup Unit

    Magnetic Pickup Unit (Figure 6–13) Removal 1. Disconnect the AC power cord from the rear of the printer. Open the top cover. 2. Remove the right side panel as described on page 6–4. 3. Loosen two captive screws and remove the cam cover (not shown). 4.
  • Page 161 1. Connector P35 Part of item 2 2. Screw 101514–037 3. MPU 131301–001 4. MPU Arm 101240–001 5. Flywheel Assembly 131865–903 Figure 6–13. Magnetic Pickup Removal/Installation Replacement Procedures 6–43...

  • Page 162: Shuttle Motor

    Shuttle Motor (Figure 6–14) Removal 1. Disconnect the AC power cord and open the top cover. 2. Open the upper paper guide (1). Remove four screws (2) and washers (3), two ground clips (18), and the lower paper guide (4). 3.
  • Page 163 1. Upper Paper Guide 108649–001 2. Screw (4) 102786–605 3. Washer (4) 101526–002 4. Lower Paper Guide 108763–001 5. Captive Screw (2) 103258–001 6. Cam Cover 140269–001 7. Gasket 106963–001 8. Base Support 132288–001 9. Nut (4) 101525–010 10. Shuttle Motor 131168–901 11.
  • Page 164 Installation 1. Position the motor in the printer. 2. Support the motor and install four carriage bolts (17), washers (16), lockwashers (15), and nuts (9). Do not tighten. 3. Connect shuttle motor connectors P34 and P40. 4. Slip the belt over the motor pulley. 5.
  • Page 165 1. Upper Paper Guide 108649–001 2. Screw (4) 102786–605 3. Washer (4) 101526–002 4. Lower Paper Guide 108763–001 5. Captive Screw (2) 103258–001 6. Cam Cover 140269–001 7. Gasket 106963–001 8. Base Support 132288–001 9. Nut (4) 101525–010 10. Shuttle Motor 131168–901 11.

  • Page 166: Shuttle Belt

    Shuttle Belt (Figure 6–15) Removal 1. Remove the flywheel assembly as described on page 6–36. 2. Remove the belt (1) from the shuttle motor pulley (2). Make sure the pulley is not loose on the shaft. Installation 1. Place the belt over the shuttle motor pulley. 2.
  • Page 167 1. Shuttle Belt 101768–003 2. Shuttle Motor Pulley Figure 6–15. Shuttle Belt Removal/Installation Replacement Procedures 6–49...

  • Page 168: Paper Ironer

    Paper Ironer (Figure 6–16) WARNING The paper ironer is extremely sharp. Exercise care when handling. Removal 1. Remove the ribbon deck assembly as described on page 6–8. 2. Remove the shuttle assembly as described on page 6–18. 3. Loosen the four paper ironer mounting screws (1). 4.
  • Page 169 1. Screw (2) 101514–061 2. Paper Ironer 102677–002 3. Plate 131413–001 Platen Figure 6–16. Paper Ironer Removal/Installation Replacement Procedures 6–51...

  • Page 170: Paper Feed Belt

    Paper Feed Belt (Figure 6–17) Removal 1. Disconnect the AC power cord from the rear of the printer. Open the top cover. 2. Remove the right and left side panels as described on page 6–4. 3. Remove two screws (1) and the belt guard (2). 4.
  • Page 171 1. Screw (2) 102786–610 2. Belt Guard 132312–001 3. Setscrew 102185–003 4. Bushing 101143–002 5. Splined Shaft 108653–001 6. Bearing Part of item 5 7. Right Side Plate 131147–002 8. Screw (4) 101514–063 9. Paper Feed Motor 131302–901 10. Paper Feed Belt 108664–001 11.
  • Page 172 Installation 1. Press the bearing against the right side plate, but do not seat it. 2. Slip the belt onto the splined shaft by passing it over the forms adjustment pulley. 3. Slip the belt onto the feed motor pulley. 4.
  • Page 173 1. Screw (2) 102786–610 2. Belt Guard 132312–001 3. Setscrew 102185–003 4. Bushing 101143–002 5. Splined Shaft 108653–001 6. Bearing Part of item 5 7. Right Side Plate 131147–002 8. Screw (4) 101514–063 9. Paper Feed Motor 131302–901 10. Paper Feed Belt 108664–001 11.

  • Page 174: Paper Feed Motor

    Paper Feed Motor (Figure 6–18) Removal 1. Disconnect the AC power cord from the rear of the printer. Open the top cover. 2. Lift the upper paper guide (1). Remove four screws (2) and washers (3), two ground clips (16), and the lower paper guide (4). 3.
  • Page 175 1. Upper Paper Guide 108649–001 2. Screw (4) 102786–605 3. Washer (4) 101526–002 4. Lower Paper Guide 108763–001 5. Connector J32 Part of item 14 6. Screw (2) 102786–610 7. Belt Guard 132312–001 8. Screw (4) 101514–063 9. Washer (4) 102158–005 10.

  • Page 176: Tractors

    Tractors (Figure 6–19) Removal 1. Disconnect the AC power cord from the rear of the printer. Open the top cover. Remove paper from printer. 2. Remove the right and left side panels as described on page 6–4. 3. Unlock the right tractor (1) and the left tractor (2). 4.
  • Page 177 1. Right Tractor 108616–902 2. Left Tractor 108616–904 3. Setscrew 102185–003 4. Bushing 101143–002 5. Splined Shaft 108653–001 6. Screw 102786–605 7. Washer 101526–002 8. Support Shaft 102095–002 9. Knob 102100–001 10. Paper Feed Belt 108664–001 Alignment Marks 11. Motor Pulley 12.
  • Page 178 Installation 1. To install the left tractor: a. Place the tractor in the printer. b. Position the cable clamp on the left tractor and install screw (12). c. Slide the splined shaft into the tractor. Make sure a specially identified depression on each tractor is in the same location relative to the splined shaft.
  • Page 179 1. Right Tractor 108616–902 2. Left Tractor 108616–904 3. Setscrew 102185–003 4. Bushing 101143–002 5. Splined Shaft 108653–001 6. Screw 102786–605 7. Washer 101526–002 8. Support Shaft 102095–002 9. Knob 102100–001 10. Paper Feed Belt 108664–001 Alignment Marks 11. Motor Pulley 12.

  • Page 180: Paper Motion Sensor

    Paper Motion Sensor (Figure 6–20) Removal 1. Disconnect the AC power cord from the rear of the printer. Open the top cover. 2. Remove the right side panel as described on page 6–4. 3. Unlock the right tractor (1) and the left tractor (2). 4.
  • Page 181 1. Right Tractor 108616–902 2. Left Tractor 108616–904 3. Screw 102786–605 4. Washer 101526–002 5. Support Shaft 102095–002 6. Knob 102100–001 7. Nut 102788–400 8. Washer 101526–005 9. Retainer 106565–001 10. Sensor 102057–001 11. Cable 131296–001 11 (Ref) 10 (Ref) Figure 6–20.
  • Page 182 Installation 1. Connect the cable to the sensor. 2. Place the sensor on the left tractor. 3. Install the nut, washer (8), and retainer. 4. Inspect installation to verify that both apertures in the sensor are visible. If not, loosen the screws and reposition as necessary. 5.
  • Page 183 1. Right Tractor 108616–902 2. Left Tractor 108616–904 3. Screw 102786–605 4. Washer 101526–002 5. Support Shaft 102095–002 6. Knob 102100–001 7. Nut 102788–400 8. Washer 101526–005 9. Retainer 106565–001 10. Sensor 102057–001 11. Cable 131296–001 11 (Ref) 10 (Ref) Figure 6–20.

  • Page 184: Paper Out Switch

    Paper Out Switch (Figure 6–21) Removal 1. Disconnect the AC power cord from the rear of the printer. Open the top cover. Remove paper. Open the rear door of the printer. 2. Disconnect connector P41 (1). Cut cable ties as necessary to free the cable assembly (2).
  • Page 185 1. Connector P41 Part of item 4 2. Cable Assembly Part of item 4 3. Screw (2) 102786–406 4. Switch Assembly 131281–001 5. Belt Cover 131555–001 Figure 6–21. Paper Out Switch Removal/Installation Replacement Procedures 6–67...

  • Page 186: Platen Open Switch

    Platen Open Switch (Figure 6–22) Removal 1. Disconnect the AC power cord from the rear of the printer. Open the top cover. Remove paper from printer. 2. Remove the left side panel as described on page 6–4. 3. Disconnect the white lead (1) and the red lead (2) from the platen open switch (3).
  • Page 187 1. White Lead 2. Red Lead 3. Switch 101867–007 4. Screw (2) 102559–420 5. Washer (2) 101526–009 6. Spacer 102132–010 7. Nut Plate 104960–001 Figure 6–22. Platen Open Switch Removal/Installation Replacement Procedures 6–69...

  • Page 188: Exhaust Fan

    Exhaust Fan (Figure 6–23) Removal 1. Disconnect the AC power cord from the rear of the printer. Open the top cover. 2. Remove the right side panel as described on page 6–4. 3. Remove four screws (1) and the fan muffler (2). 4.
  • Page 189 1. Screw (4) 140113–003 2. Fan Muffler 131818–001 3. Connector Part of item 6 4. Screw (4) 102786–628 5. Washer (4) 101526–002 6. Fan 131913–001 AIRFLOW Figure 6–23. Exhaust Fan Removal/Installation Replacement Procedures 6–71...

  • Page 190: Dcu, Mcu, Mechanism Driver Pcbas

    1. If installing a new PCBA: a. Compare the original PCBA with the replacement. If the new board is a different firmware version, refer to the P9012 User’s Manual for configuration details. b. If the new board is the same firmware version, remove any PROMs, jumpers, or terminations from the original board and install them on the replacement board.
  • Page 191 DCU and MCU PROM Locations Install PROMs on the DCU and MCU boards at the following locations: Location Font PROMs 8W (–001) and 10W (–002) Program PROMs 8P (–001) and 10P (–002) Location Program PROM 6F (–001) 1. Screw (2) 102786–608 2.

  • Page 192: Hammer Driver And Power Supply Pcbas

    Hammer Driver and Power Supply PCBAs (Figure 6–25) Removal WARNING High electrical potentials are present on the hammer driver and power supply PCBA capacitors when the printer is powered down. To avoid shock hazard and damage to the equipment, wait at least 5 minutes after powering down before removing the hammer driver or power supply PCBAs.
  • Page 193 1. Screw (2) 102786–608 2. Cover 131388–002 3. Ejection Lever (2) 131268–001 4. PCBA (as required) Hammer Driver 131666–901 Power Supply 133546–902 5. Card Cage 133610–001 Figure 6–25. Hammer Driver, Power Supply PCBA Removal/Installation Replacement Procedures 6–75...

  • Page 194: Card Cage

    Card Cage (Figure 6–26) Removal 1. Disconnect the AC power cord from the rear of the printer. 2. Remove the right side panel as described on page 6–4. 3. Loosen the four screws (1) which secure the two card cage covers (2, 3). Do not remove the screws.
  • Page 195 1. Screw (4) 102786–608 2. Cover 133860–001 3. Cover 131388–002 4. Cables (as required) 5. Card Cage 133983–001 6. Clip 109822–002 4 (ref) Figure 6–26. Card Cage Removal/Installation (1 of 4) Replacement Procedures 6–77...
  • Page 196 5. On the rear of the printer, remove the I/O panel (7) as follows: a. Remove five screws (8) and pull the I/O panel partially out of the printer cabinet. b. On the opposite side of the panel, disconnect the seven terminal wires (9) from the circuit breaker (10).
  • Page 197 7. Rear I/O Panel 131912–005 8. Screw (5) 140113–003 9. Terminal (7) Part of item 10 10. Circuit Breaker 109520–001 11. Connector P2 12. Connector J2 13. Ground Wire CB1–1 CB1–4 CB1–6 Blue Brown Black CB1–2 Brown CB1–3 CB1–5 CB1–7 Black Blue Black...
  • Page 198 6. Remove the six screws (14) which secure the card cage to the printer cabinet. Four of these screws are located on the bottom front plate of the card cage. The remaining two screws (not shown in illustration) are located on the rear of the card cage. To access these two screws, open the rear door of the printer and look to the lower left side of the printer frame.
  • Page 199 14. Screw (6) 140113–003 15. Connector (A/R) 16. Logic Backplane PCBA 133453–001 17. Connector P18 18. Connector P17A Figure 6–26. Card Cage Removal/Installation (3 of 4) Replacement Procedures 6–81...
  • Page 200 11. Remove the nut, starwasher, and card cage ground wire (19) from inside the printer cabinet. This ground wire is attached to the same post as the I/O panel ground wire. Disengage the wire from the clips. 12. Remove twelve screws (20) and the six hammer driver connectors (21) from the rear of the card cage.
  • Page 201 19. Ground Wire 20. Screw (12) 101513–001 21. Hammer Driver Connector (6) Figure 6–26. Card Cage Removal/Installation (4 of 4) Replacement Procedures 6–83...
  • Page 202 Installation To install the card cage, refer to Figure 6–26 (1 through 4) on the preceding pages and perform the following steps: 1. Slide the card cage assembly part way into the printer. 2. Mount the six hammer driver connectors (21) to the rear of the card cage with twelve screws (20).
  • Page 203 This page intentionally left blank. Replacement Procedures 6–85...

  • Page 204: Card Cage Fan

    Card Cage Fan (Figure 6–27) NOTE: There are two card cage fans. The following procedure applies to either. Removal 1. Remove the card cage as described on page 6–76. 2. Remove four screws (1) and washers (2). 3. Disconnect the connector (3). 4.
  • Page 205 1. Screw (4) 102786–628 2. Washer (4) 101526–002 3. Connector Part of item 4 4. Fan 131913–001 5. Card Cage 133610–001 AIRFLOW Figure 6–27. Card Cage Fan Removal/Installation Replacement Procedures 6–87...

  • Page 206: Ac Power Bus Assembly

    AC Power Bus Assembly (Figure 6–28) Removal 1. Remove the card cage as described on page 6–76. 2. Remove two screws (1) and the insulator (2) in three places. 3. Remove the AC power bus assembly (3) from the card cage (4). Installation 1.
  • Page 207 1. Screw (6) 102559–412 2. Insulator (3) 131435–001 3. AC Power Bus Assembly 133482–001 4. Card Cage 133610–001 Figure 6–28. AC Power Bus Assembly Removal/Installation Replacement Procedures 6–89...

  • Page 208: Dc Power Bus Assembly

    DC Power Bus Assembly (Figure 6–29) Removal 1. Remove the card cage as described on page 6–76. 2. Remove three nuts (1) and washers (2). 3. Remove two screws (3) in six places. 4. Separate the DC power bus assembly (4) from the card cage (5). Installation 1.
  • Page 209 1. Nut (3) 101525–012 2. Washer (3) 140858–001 3. Screw (12) 102559–407 4. DC Power Bus Assembly 131313–001 5. Card Cage 133610–001 Figure 6–29. DC Power Bus Assembly Removal/Installation Replacement Procedures 6–91...

  • Page 210: Hammer Driver Backplane Pcba

    Hammer Driver Backplane PCBA (Figure 6–30) Removal 1. Remove the card cage as described on page 6–76. 2. Disconnect the connector (1). 3. Remove two screws (2) in three places. 4. Separate the hammer driver backplane PCBA (3) from the card cage (4). Installation 1.
  • Page 211 1. Connector Part of item 3 2. Screw (6) 102559–405 3. Hammer Driver Backplane PCBA 131390–001 4. Card Cage 133610–001 Figure 6–30. Hammer Driver Backplane PCBA Removal/Installation Replacement Procedures 6–93...

  • Page 212: Logic Backplane

    Logic Backplane (Figure 6–31) Removal 1. Remove the card cage as described on page 6–76. 2. Remove three nuts (1) and washers (2). 3. Lift the end of the DC power bus assembly (3) off the studs (4). 4. Disconnect connectors (5) and (6). 5.
  • Page 213 1. Nut (3) 101525–012 2. Washer (3) 140858–001 3. DC Power Bus Assembly 131313–001 4. Stud (3) 5. Connector (Fans) 6. Connector (Hammer Driver) 7. Screw (10) 102559–606 8. Metal Washer (3) 101526–002 9. Nylon Washer (7) 101547–011 10. Logic Backplane 133453–001 11.
  • Page 214 6–96 Replacement Procedures...
  • Page 215 Power Paper Stacker Maintenance Chapter Contents Introduction ......... A–2 Power Paper Stacker PCBA .

  • Page 216: Introduction

    Introduction The Power Paper Stacker (Figure A–1) maintains a constant distance between the paper exit path and the stack of printed paper. A phototransistor senses an infrared beam to determine this distance and triggers the pulley motor to lower the paper rack. This appendix contains removal/installation procedures for power paper stacker components replaceable at the field service maintenance level.
  • Page 217 Power Paper Stacker Printer Rear Figure A–1. Power Paper Stacker Power Paper Stacker Maintenance A–3...

  • Page 218: Power Paper Stacker Pcba

    Power Paper Stacker PCBA (Figure A–2) Removal 1. Remove the left side panel as described on page 6–4 of Chapter 6, Replacement Procedures. 2. Disconnect the five cables from the power paper stacker PCBA (1). 3. Remove five screws (2) and the PCBA. Installation 1.
  • Page 219 1. Power Paper Stacker PCBA 134383–001 2. Screw (5) 102786–410 3. Connector J2 Part of item 2 4. Connector J4 (Upper) Part of item 2 5. Connector J4 (Lower) Part of item 2 6. Connector J3 Part of item 2 7.

  • Page 220: Motor Assembly

    Motor Assembly (Figure A–3) Removal 1. Remove the left side panel as described on page 6–4 of Chapter 6, Replacement Procedures. 2. Disconnect P2 (1) of the motor cable assembly from J2 on the PCBA. 3. Loosen the set screw (2) nearest the motor on the coupling (3). 4.
  • Page 221 1. Connector P2 Part of item 5 2. Setscrew Part of item 3 3. Coupling (2 parts) 134555–001, –002 4. Screw (4) 102786–108 5. Motor Assembly 134426–002 Figure A–3. Motor Removal/Replacement Power Paper Stacker Maintenance A–7...

  • Page 222: Stacker Limit Switches

    Stacker Limit Switches (Figure A–4) Removal 1. Remove the left side panel as described on page 6–4 of Chapter 6, Replacement Procedures. 2. Disconnect S2–COM (1) and S2–NO (2) of the stacker limit switch cable assembly (3) from the upper stacker switch (4). Disconnect S3–COM (5) and S3–NO (6) from the lower switch.
  • Page 223 1. Connector S2–COM Part of item 3 2. Connector S2–NO Part of item 3 3. Stacker Switch Cable Assembly 133787–001 4. Switch (2) 101867–007 5. Connector S3–COM Part of item 3 6. Connector S3–NO Part of item 3 7. Screw (4) 102786–410 8.

  • Page 224: Position Control Switch Assembly

    Position Control Switch Assembly (Figure A–5) Removal 1. Remove the left side panel as described on page 6–4 of Chapter 6, Replacement Procedures. 2. Disconnect P4–1 (1) of the position control switch cable assembly from the lower portion of J4 on the stacker PCBA. 3.
  • Page 225 1. Connector P4–1 Part of item 4 2. Screw (2) 102786–605 3. Washer (2) 101526–002 4. Switch Assembly 133789–001 5. Bracket 133639–001 1 (Ref) Figure A–5. Position Control Switch Removal/Replacement Power Paper Stacker Maintenance A–11...

  • Page 226: Emitter Assembly

    Emitter Assembly (Figure A–6) NOTE: The emitter is mounted on the center panel directly behind the blower assembly/card cage and opposite the stacker column. Removal 1. Remove the left and right side panels as described on page 6–4 of Chapter 6, Replacement Procedures. 2.
  • Page 227 1. Connector P1 Part of item 2 2. Logic Cable Assembly 133783–001 3. Connector J1 Part of item 4 4. Emitter 133669–901 5. Screw (2) 102786–605 6. Center Panel 7. Locking Tab Part of item 1 STACKER COLUMN Figure A–6. Emitter Removal/Replacement Power Paper Stacker Maintenance A–13...

  • Page 228: Logic Cable Assembly

    Logic Cable Assembly (Figure A–7) Removal 1. Remove the left and right side panels as described on page 6–4 of Chapter 6, Replacement Procedures. 2. Disconnect P3 (2) of the logic cable assembly (1) from J3 on the stacker PCBA. 3.
  • Page 229 1. Logic Cable Assembly 133783–001 2. Connector P3 Part of item 1 3. Connector P1 Part of item 1 4. Connector J1 Part of item 5 PRINTER TOP VIEW 5. Emitter 133669–901 (Cutaway) 6. Connector P19 Part of item 1 7.

  • Page 230: Dc Power Cable Assembly

    DC Power Cable Assembly (Figure A–8) Removal 1. Remove the left and right side panels as described on page 6–4 of Chapter 6, Replacement Procedures. 2. Disconnect P1 (1) of the DC power cable assembly (2) from J1 on the stacker PCBA.
  • Page 231 PRINTER TOP VIEW (Cutaway) (REAR) (Ref) 1. Connector P1 Part of item 2 2. DC Power Cable Assembly 134414–001 3. Logic Backplane 133885–001 4. DC Power Bus Assembly 131313–001 E1 (–12V) E2 (RTN) E3 (+36V) Figure A–8. DC Power Cable Removal/Installation Power Paper Stacker Maintenance A–17...

  • Page 232: Test The Power Paper Stacker

    Test the Power Paper Stacker (Figure A–9) The stacker senses the presence of paper by transmitting a beam of infrared (invisible) light from the emitter to the light shield. When the emitter is properly adjusted and the infrared beam is unobstructed, the BEAM LED will be illuminated.
  • Page 233 1. Switch 141054–001 2. BEAM LED 141211–001 3. Emitter 133669–901 4. Light Shield 134467–001 5. Screw (3) 101514–068 Figure A–9. Emitter Adjustment Power Paper Stacker Maintenance A–19...

  • Page 234: Prepare The Printer For Operation

    Prepare the Printer for Operation 1. Load the paper. (Refer to “Loading Paper” in the P9012 User’s Manual.) 2. Turn printer power on and place the printer on line. IMPORTANT Anytime you remove paper from the stack of printed paper, it is important to return the paper stacker to the operating position.

  • Page 235: Troubleshooting Guide

    Troubleshooting Guide Table A–1 lists possible paper stacker fault conditions and how to correct them. Table A–1. Fault Conditions Message / Problem Cause Solution FAULT CONDITION The paper is not stacking properly. Reposition the paper gate by sliding STACKER the paper scale in or out. The stacker does not The emitter photosensor beam is Make sure nothing is blocking the...
  • Page 236 A–22 Power Paper Stacker Maintenance...

  • Page 237: Interconnect Diagram

    Interconnect Diagram The interconnection diagram on page B–2 shows the printer’s electrical interconnections in block diagram form. Use this diagram as a troubleshooting aid. Interconnect Diagram B–1...
  • Page 238 Mechanics Assy S1 Platen Open Cable Assy, Fault Switch Shuttle Assy Belt Cover Assy Magnetic Paper FD Shuttle Tractor Hammerbank Assy Pick–up Motor Assy Motor Assy Assy, LH S2 Paper Out P/O LH Tractor Assy Cable Assy Cable Assy Hammerbank Int Paper Motion Detector Control Panel Main Harness...
  • Page 239 Mnemonics The following list presents the signal mnemonics used in Chapter 2, Principles of Operation. Mnemonics with initial letter “N” are negative true, all others are positive true. MNEMONIC DEFINITION +5VHL ... . Isolated +5V from –12V 2MHZCLK .
  • Page 240 CNTLCD ..Control Code Detected (Parallel) COLOR ... Color Address Select ... . . Communication to Hammer Drivers COM1 .
  • Page 241 LATPOL ..Latch Strobe Polarity LRIBMTR+,– ..Left Ribbon Motor + & – MANLOAD ..Manual Hammer Load MA0–8 .
  • Page 242 NFDWR ... Hammer Fire Data Write NFIRE ... . Summation of Hammer Fire NFLT ... . . Fault NFONT0 .
  • Page 243 NTOF ... . . Top of Form NTXSTB ..DMA Transmit Data Strobe ....Upper Hammer Drive NUDTOSPD .
  • Page 244 SERXFER ..Serial I/O DMA Data Transfer SHAM0–2 ..Sense Hammer Driver 0 to 2 SHAMX ... Sense Hammer Out to HAM 0 to 2 SHCNTW .
  • Page 245 Torque Table IMPORTANT Torque values specified in replacement procedures (Chapter 6) take precedence over Table D–1. Table D–1 establishes the torque requirements for routine installation of threaded fasteners. These requirements apply to fasteners made of steel, at a minimum engagement of 3.5 threads, including chamfer and countersink. Fastener sizes are listed as Numbered Size –...
  • Page 246 Torque Table D–2...
  • Page 247 Metric Conversion Tables Length Multiply To Obtain foot 0.3048* meter (m) foot 30.48* centimeter (cm) foot 304.8* millimeter (mm) inch 0.0254* meter (m) inch 2.54* centimeter (cm) inch 25.4* millimeter (mm) meter 3.280840 foot centimeter 0.03280840 foot millimeter 0.003280840 foot meter 39.37008 inch...
  • Page 248 Mass and Density Multiply To Obtain pound* 0.4535924 kilogram (kg) ounce* 28.34952 gram (g) kilogram 2.204622 pound* gram 0.03527397 ounce* * avoirdupois Temperature To Convert From Use Formula temperature Celsius (t temperature Fahrenheit (t = 1.8t + 32 temperature Fahrenheit (t temperature Celsius (t = (t –...
  • Page 249 Index AC power bus assembly, replacing, 6–88 Cam wick, replacing, 6–40 Adjusting Card cage fan, replacing, 6–86 counterweight preload, 5–6 Card cage, replacing, 6–76 counterweight spring, 5–10 CHANGE RIBBON fault message, 4–5 hammer spring, 5–14 Character formation magnetic pickup gap, 5–20 by one hammer, 2–8 magnetic pickup phasing, 5–22 standard, 2–7...
  • Page 250 Faults field service required, 4–4 DC cable, power stacker, replacing, A–16 operator correctable, 4–3 DC power bus assembly, replacing, 6–90 Features optional, 1–6 block diagram, 2–16 standard, 1–5 operation, 2–14 Flywheel assembly, replacing, 6–36 DCU PCBA, replacing, 6–72 FONT PROM * fault message, 4–5 Description, printer, 1–4 Functional elements, 2–9 Dot matrix printing, description, 2–3...
  • Page 251 Left side panel, replacing, 6–4 Operation control panel, 2–12 Limit switches, power stacker, replacing, A–8 DCU, 2–14 Logic backplane, replacing, 6–94 hammer bank and shuttle, 2–28 Logic cable, power stacker, replacing, A–14 hammer driver, 2–25 magnetic pickup, 2–28 MCU, 2–18 mechanism driver, 2–22 Magnetic pickup paper feed control, 2–34...
  • Page 252 PCBA, power stacker, replacing, A–4 Printer cleaning, 3–4 PCBA, replacing self–tests, 4–14 DCU, 6–72 hammer driver, 6–74 PROGRAM PROM * fault message, 4–9 hammer driver backplane, 6–92 MCU, 6–72 mechanism driver, 6–72 Replacing power supply, 6–74 AC power bus assembly, 6–88 ribbon control, 6–10 airflow assembly, 6–16 Platen gap, adjusting, 5–18...
  • Page 253 power paper stacker logic cable, A–14 STACKER fault message, 4–10 power paper stacker motor, A–6 Supplies list, 1–13 power paper stacker PCBA, A–4 Switches, control panel, 1–7 power paper stacker position switch, A–10 Switches, replacing power supply PCBA, 6–74 paper out, 6–66 ribbon control PCBA, 6–10 platen open, 6–68 ribbon deck, 6–8...
  • Page 254 Index–6...
  • Page 256 132305–001, Rev E...

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