Page 2 - NOTICE
-.. , NOTICE “ All rights reserved. Reproduction of any part of this manual in any from whatsoever without SEIKO EPSON’s express written permission is forbidden. “ The contents of this manual are subject to change without notice. “ All efforts have been made to ensure the accuracy of the contents of...
Page 3 - P R E C A U T I O N S; DANGER
P R E C A U T I O N S Precautionary notations throughout the text are categorized relative to 1 ) personal injury, and 2) damage to equipment: DANGER Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great caution should be exercised in performing procedures p...
Page 4 - PREFACE
PREFACE This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair of the 170. The instructions and procedures included herein are intended for the experienced repair technician, and attention should be given to the precautions on the preceding page. The...
Page 5 - R E V I S I O N S H E E T; DATE ISSUED; st issue
R E V I S I O N S H E E T DATE ISSUED CHANGE DOCUMENT A June 15, 1992 1st issue
Page 6 - TABLE OF CONTENTS
REV.-A TABLE OF CONTENTS CHAPTER 1. GENERAL DESCRIPTION CHAPTER 2. OPERATING PRINCIPLES CHAPTER 3. DISASSEMBLY AND ASSEMBLY CHAPTER 4. A D J U S T M E N T S CHAPTER 5. T R O U B L E S H O O T I N G CHAPTER M A I N T E N A N C E A P P E N D I X vi -
Page 8 - LIST OF FIGURES
1.6 Main Components ........................................1-28 1.6.1 BOARDASSEMBLY,C094MAlN(Main ControlCircuitBoard) ............1-29 1.6.2 1.6.3 BOARD ASSEMBLY, (Power circuit Board) ......1 -30 1.6.4 Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....
Page 9 - LIST OF TABLES; Cut; Table 1-9. Electrical Specifications for
REV.-A LIST OF TABLES Table 1-1. Line Feed Speed (1 line= 1/6”) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 Table 1-2. Specifications for Cut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6 Tab...
Page 10 - Scope; EPSON
Scope These specifications apply to the EPSON 1.1.1 Features ● Upward compatibility with the FX-850(+)/1050(+), ● 380 (high-speed draft for both 80 and 136-column models) ● 285 (draft pica), 342 (draft elite) ● Advanced paper handling Continuous paper -3 paths for insertion (front/bottom/rear) - Dua...
Page 12 - Options; intelligent serial l/F card
1.1.2 Options (U.S. version) (other) (U.S. version) (other) (U.S. version) (other) (U.S. version) (other) (U.S. version) (other) C800211 (U.S. version) C800212 (other) C814011 (inch screw) (mm screw) (inch screw) (mm screw) (inch screw) C82311 (mm screw) #8750 #8755(M) #8758 #8310 Plain cut sheet fe...
Page 16 - Table 1-4. Specifications for Continuous Paper
m- —--i Width front insertion Length Quality Thickness Weight Copies 182-257 mm (7.2-10.1”) 80-column 182-364 mm (7.2-14.3”) 136-column Up to 297 mm (1 1.7”) 80-column Up to 364 mm (14.3”) 136-column Carbonless duplicating paper 0.12-0.22 mm (0.0047-0.0086”) 12-15 lb (34-50 kg) (40-58 - each 4 sheet...
Page 18 - Printable Area; Figure 1-3. Printable Area for Cut Sheets
1.2.1.4 Printable Area Cut sheets top insertion 148-257 mm (5.8-10.1”): columns 148-420 mm (5.8-16.5”) : 136 columns front insertion 182-257 mm (7.2-10.1”): columns 182-364 mm (7.2-14.3”): columns ● L Printable Area 1. Figure 1-3. Printable Area for Cut Sheets * 1 3.0 mm (0.1 2“) or more when the pa...
Page 19 - Figure 1-4. Printable Area for Continuous Paper
REV.-A 2) Continuous paper * 1 Printable Area L \ Figure 1-4. Printable Area for Continuous Paper *1 13 mm (0.51”) or more when the paper width is 101 mm to 241 mm (4” to 9.5”). 25 mm (1.0”) or more when the paper width is 254 mm (10”). ( 80 columns) . . 13 mm (0.51”) or more when the paper width is...
Page 20 - top insertion; mm; ABCD; Figure 1-5. Printable Area for Roll Paper; Ribbon
3) Roll paper (80-column model only) top insertion 216 +/- 3 mm (8.5 0.12”) 101-254 mm (4-10”): columns 101-406 mm (4-16”): 136 columns > ● 1 Printable Area o0 000 0 00 , 0 . - - 0 . ABCD . . u 0 0 0 *1 3.0 Note: 1.2.1.5 Figure 1-5. Printable Area for Roll Paper mm (0.1 2“) or more Paper feed acc...
Page 24 - Table 1-14. Connector Pin Assignments and Signal Functions
, 1.3 Interface This printer has a built-in, 8-bit centronics parallel interface. 1.3.1 Parallel Interface Data transmission mode 8-bit parallel Synchronization Controlled by external STROBE pulse. Handshaking Controlled by ACKNLG and BUSY signals. Logic level compatible Connector plug 57-30360 (Amp...
Page 26 - Optional Interface; Buttons
REV.-A , 1.3.2 Optional Interface The following interface cards can be used for this printer. Table 1-15. Optional Interface Catalog # Type C82305* (inch screw) Serial I/F card C82306* (inch screw) Serial l/F card (inch screw) intelligent serial l/F card C82308* (inch screw) intelligent serial l/F c...
Page 28 - ON
Advances the paper forward by inch per step. F E E D I Moves the paper backward by 1/108 inch per step. Pressing FONT along with PAUSE or PAPER FEED lets you micro-adjust the following positions: ● the loading position, immediately after paper is loaded in the printer. ● the tear-off position, when ...
Page 29 - Functions; Default Settings
Functions 1.5.1 Default Settings Users can set certain default parameters, which will be used at printer initialization. To change the parameters shown in Table 1-16, Group 1 Features, follow the steps below. 2. 3. 4. 5. Turn on the printer while pressing the FONT button. Then, the current default s...
Page 31 - Table 1; for
Table 1 7. Group 2 Features Mode) FONT READY table LED I LED I LED ON Italic U. S. A.(std. setting) BLINKS France OFF Germany OFF ON OFF ON OFF ON OFF BLINKS OFF BLINKS OFF BLINKS ON OFF ON I U.K. B L I N K S Denmark OFF Sweden ON Italy BLINKS Spain OFF Character table ON BLINKS ON OFF ON OFF OFF ON...
Page 32 - Hexadecimal Dump
1.5.2 Power On Default Settings The printer also lets you change some of its power on parameters. To change the settings shown in Table 1- 19, Group 3 Features (Power on settings), follow the steps below. 1. Turn on the printer while pressing the PAUSE, PAPER FEED, and FONT buttons. 2. Press the but...
Page 33 - Self Test
1.5.5 Self Test Press the PAPER FEED button while turning on the printer to put the printer in self-test mode. To stop the self test, turn off the printer. (The control panel is still operational in self-test mode for paper handling and font selection. ) When pages are printed from the the first she...
Page 35 - signal
Position 1 (3rd step) Platen Gap Adjust Lever Figure 1-10. Lever Positions 1.5.12 Printer Initialization The printer is initialized in the following cases. (1) When the printer is turned on. (2) When the signal or (optional l/F ) is input. When the printer is initialized, it performs the following f...
Page 38 - HEAD
BOARD ASSEMBLY, MAIN (Main Control Circuit Board) Basically, the same board layout is used in both the 136-column model and the 80-column model. The CPU on this board controls all the main functions of the printer. It consists of a 8-bit CPU, an E05A55YA gate array, an a PSRAM, a MASK ROM, motor dri...
Page 43 - Works
LIST OF FIGURES Figure 2-l. Howthe Works ............................2-2 Figure 2-2. Carriage Operation . . . . . . . . . . . . . . . . . . .. 2-3 Figure 2-3. Platen Gap Adjust Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....
Page 44 - Printer Mechanism Operation; Mechanism; circuit
REV.-A 2.1 Printer Mechanism Operation This section describes the printer mechanism of the 170 printer and explains how the printer works. The 170 printer mechanism features a 9-pin impact dot for has four main parts: 1) the mechanism, 2) the carriage movement mechanism, 3) the paper feed mechanism,...
Page 50 - Figure 2-5. Push Tractor Operation Using the Rear Paper Entrance
push Tractor Method When the push tractor method is used with the rear entrance, the torque generated by the PF motor is transmitted to the push tractor gear through the PF motor pinion gear, paper advance reduction gear, and tractor reduction gear. When the PF motor pinion gear turns in the directi...
Page 51 - Figure 2-6. Push Tractor Operation Using the Front Paper Entrance
Paper (Continuous) & \ \ Motor, Paper AdvanceReduction Gear Drive Roller Gear PF Push Tractor \ Push Tractor Gear Figure 2-6. Push Tractor Operation Using the Front Paper Entrance 2-8
Page 52 - Figure 2-7. Pull Tractor Operation Using the Bottom Paper Entrance
REV.-A (3) Tractor Method The pull tractor advances paper in basically the same way as the push tractor. The push tractor is installed at the paper entrance and pushes the paper into the printer mechanism. The pull tractor, however, is installed at the paper exit and pulls the paper out of the print...
Page 55 - II
(5) Release Lever The release lever is used to select friction or tractor feeding or release the paper. When the release lever is set to the friction feed position, the paper guide rollers are pressed against the platen. When it is set to one of the tractor feed positions, this pressure is released ...
Page 56 - is located behind the printer mechanism.; Figure 2-12. Paper Path for Friction Feeding Using the Top Entrance
REV.-A 2.1.4.3 Paper Paths This section describes the various paths the paper follows through the printer mechanism. The various paper paths are divided into four groups depending on the entrance or front) the PaPer is fed Note: The front PE (paper-end) detector is located in front of the printer me...
Page 57 - Printhead; Paper Guide Rollers
(2) Rear entrance Figures 2-13 and 2-14 show the paper paths fortractorfeeding using the rear entrance. The rear entrance can be used with any of the following paper feed methods: the push tractor feed method, the pull tractor feed method, or the push-pull tractor feed method. When the rear entrance...
Page 58 - Using the Rear Entrance
Paper Printhead ctor ear) Paper Guide Rollers Figure 2-15. Paper Path for Push-pull Tractor Feeding Using the Rear Entrance (3) Bottom entrance Figure 2-16 shows the paper path fortractorfeeding using the bottom entrance. The bottom entrance is used only for pull tractor feeding. When the bottom ent...
Page 61 - Ribbon Advance Mechanism; Ribbon Advance Roller
REV.-A 2.1.4 Ribbon Advance Mechanism The ribbon is held between the ribbon advance roller (ribbon driving gear) and the ribbon pressure roller. i... When the carriage moves ontheshaft, the timing belt turns the belt driven pulley, andthetorque is transmitted to the ribbon driving gear through the t...
Page 62 - Power Supply Operation; Table 2-3. Power Supply Input Voltages and Fuse Ratings
REV.-A 2.2 Power Supply Operation The FX-870/l 170 printer is powered by either of the two power supply boards: 120 power supply board (BOARD ASSEMBLY, or 220/240 power board These boards output the DC current necessary to drive the printer control circuits and the printer drive mechanism. Fuse F1 (...
Page 64 - Figure 2-22. Power Supply Circuit Block Diagram
Primary Secondary Full WaveRectification — Smoothing Switching Smoothing Circuit Circuit Circuit Circuit m Filter Circuit AC input I I 1 +5 Switching Regulator . . . . . . . . . . . . . . . Over CurrentControl Circuit Over VoltageControl Circuit Photo- +35 V Line coupler Detector Circuit I +5 V Line...
Page 65 - Control Circuit Operation; Figure 2-23. Control Circuit Block Diagram
2.3 Control Circuit Operation The control circuit consists of two circuit boards: the MAIN (the main control circuit board) and the PNL (the control panel circuit board). This section describes the operation of these boards. 2.3.1 Control Circuit Operation Overview The CPU on the MAIN is the 8-bit T...
Page 66 - CPU
Figure 2-24 shows the data flow from the host computer to the Data sent from the host computer is converted to image data and transmitted to the through the gate array. CPU Print data conversion Image data transfer I n p u t buffer I m a g e buffer Figure 2-24. Data Flow 2-23
Page 69 - Figure 2-26. Sensor Circuit Block Diagram
REV.-A 2.3.3 Sensor Circuits The printer has the following sensors: (FRONT), (REAR), (platen RELEASE LEVER, and HEAD TEMPERATURE. All the sensors are momentary switches, except the PE (REAR) sensor, which is a photo diode, and the HEAD TEMPERATURE sensor, which is a thermistor. In addition to the se...
Page 70 - Figure 2-27. Carriage Motor Drive Circuit
REV.-A 2.3.4 Carriage Motor Drive Circuit The carriage motor drive circuit controls the CR motor. An open loop, constant current drive arrangement runs the CR motor. 2-2 and 1-2 phases are used to excite the motor. A 2-2 phase step is equivalent to a 1-2 phase step doubled. Table 2-5 describes the m...
Page 71 - Figure 2-28. Paper Feed Motor Drive Circuit
2.3.5 Paper Feed Motor Drive Circuit The PF motor (a stepping motor) is used to advance the paper. The minimum advance rate is 1/216 inch. The , motor is a 2-2 phase, constant voltage drive motor. CPU ports to are used to control the PF motor. Phase data for the PF motor are outputted through these ...
Page 72 - Drive Circuit
2.3.6 Drive Circuit The drive circuit receives two types of signals; image data and the pulse length control signal. Image data is created in the CPU, transferred to the gate array, and latched to the The pulse length control signal is set by the CPU. The pulse length is adjusted referring to the vo...
Page 73 - Control Circuit
REV.-A 2.3.8 Control Circuit Figure 2-31 shows the control circuit. The is non-volatile memory containing information . such asthetop-of-form position. Because the is a serial device, the gate array converts the parallel data (sent from the host computer) into serial data. CPU Data Bus Figure 2-31. ...
Page 74 - DETECTOR
REV.-A CHAPTER 3 DISASSEMBLY AND ASSEMBLY 3.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3.1.1 Precautions . . . . . . ....
Page 75 - Figure; Table 3-2. Equipment Required for Maintenance
LIST OF FIGURES Figure 3-1. Flowchart for Disassembling the Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4 Figure 3-2. Removing the PAPER GUIDE ASSEMBLY .......................................3-5 Figure 3-3. Removing the PANEL UNIT ...........................
Page 76 - The power switch is wired in the; CAUTION; Tools; only tools that meet these specifications.; Note: All the tools in the table above are commercially available.
, 3.1 Overview This section describes the information you need to know before you disassemble or assemble the printer. 3.1.1 Precautions Follow the precautions below before you disassemble or assemble the printer. WARNING Before disassembling, assembling, or adjusting the printer, disconnect the pow...
Page 79 - Disassembly and Assembly; WARNING; below shows the order in which you need to disassemble the printer.; START 1
REV.-A 3.2 Disassembly and Assembly This section describes the procedures for disassembling and assembling the main components of the printer. In general, you can install a component in the printer by simply reversing the procedure for removing the component. Therefore, this chapter does not describ...
Page 81 - w i t h e x D o s e d; the
REV.-A 3.2.2 Removing the PANEL UNIT [STEP 11 Remove the PAPER GUIDE ASSEMBLY, top cover, front cover, paper eject cover and tractor unit. (See Section 3.2.1.) [STEP 21 Push the two clips on the bottom of the panel unit and remove the PANEL UNIT. [STEP 3] Remove the flexible flat cable cable). PAN F...
Page 82 - the FFC cable from the
REV.-A 3.2.3 Removing the [STEP 1] Remove the PAPER GUIDE ASSEMBLY, top cover, front cover, paper eject cover, and tractor unit. (See Section 3.2.1.) [STEP 21 Remove the two CBS screws and the FFC cable from the [STEP 31 Remove the Figure 3-5. Removing the 3-7
Page 83 - Removing the HOUSING ASSEMBLY, UPPER; Remove the three; c u t
REV.-A 3.2.4 Removing the HOUSING ASSEMBLY, UPPER [STEP 11 Remove the PAPER GUIDE ASSEMBLY, top cover, front cover, paper eject cover and tractor unit. (See Section 3.2.1.) [STEP 21 Remove the PANEL UNIT. (See Section 3.2.2.) [STEp 31 Remove the three screws securing the HOUSING (There are only two ...
Page 85 - C B S; PLATEN KNOB
REV.-A 3.2.5.1 Removing the PLATEN ASSEMBLY [STEP 1] Remove the PAPER GUIDE ASSEMBLY, top cover, front cover, paper eject cover and tractor unit. (See Section 3.2.1.) [STEP 21 R e m o v e t h e P A N E L U N I T . ( S e e S e c t i o n 3.2.2.) - [STEP 31 Remove the HOUSING ASSEMBLY, UPPER. (See Sect...
Page 87 - Face Screw
3.2.5.3 Removing the MOTOR ASSEMBLY, CR , [STEP 11 [STEP 2] [STEP 3] [STEP 41 51 61 Remove the PAPER GUIDE ASSEMBLY, top cover, front cover, paper eject cover, and tractor unit. (See Section 3.2.1.) Remove the PANEL UNIT. (See Section 3.2.2.) Remove the HOUSING ASSEMBLY, UPPER. (See Section 3.2.4.) ...
Page 88 - Removing the MOTOR ASSEMBLY, PF; Set the LEVER, RELEASE to the vertical or forward position.
3.2.5.4 Removing the MOTOR ASSEMBLY, PF [STEP 11 Remove the PAPER GUIDE ASSEMBLY, top cover, front cover, paper eject cover and tractor unit. Section 3.2.1.) [STEP 21 Remove the PANEL UNIT. (See Section 3.2.2.) [STEP 31 Remove the HOUSING ASSEMBLY, UPPER. (See Section 3.2.4.) [STEP 41 Remove the PRI...
Page 89 - screws
3.2.5.5 Disassembling the GEAR TRAIN, PF , . [STEP 1] 21 31 [STEP 41 [STEP 51 [STEP 61 [STEP 71 [STEP 81 Remove the PAPER GUIDE ASSEMBLY, top cover, front cover, paper eject cover and tractor unit. (See Section 3.2.1.) Remove the PANEL UNIT. (See Section 3.2.2.) Remove the HOUSING ASSEMBLY, UPPER. (...
Page 90 - Section; Remove; Release the TIMING BELT from the two clips at the
3.2.5.6 Removing the CARRIAGE GUIDE ASSEMBLY [STEP 11 [STEP 21 [STEP 31 [STEP 41 [STEP 51 [STEP 61 [STEP 71 [STEP 81 [STEP 91 [STEp Remove the PAPER GUIDE top cover, front cover, paper eject cover and tractor unit. (See Section 3.2.1.)Remove the PANEL UNIT. (See Section 3.2.2.) Remove the PRINTHEAD....
Page 94 - Remove the; Remove the DETECTOR,
REV.-A 3.2.5.10 Removing the Front and Rear Paper End (PE) DETECTORS [STEP 11 [STEP 2] [STEP 3] [STEP 4] [STEp 51 [STEP 61 [STEP 71 [STEP 81 Remove the PAPER GUIDE ASSEMBLY, top cover, front cover, paper eject cover, and tractor unit. (See Section 3.2.1.)Remove the PANEL UNIT. (SeeSection 3.2.2.) Re...
Page 95 - Disconnect the LEAD, RELEASE from the detector.
3.2.5.11 Removing the DETECTOR, RELEASE [STEP 11 [STEP 21 [STEP 31 [STEP 41 51 [STEP 6] 71 81 Remove the PAPER GUIDE ASSEMBLY, top cover, front cover, paper eject cover, and tractor unit. (See Section 3.2.1.) Remove the PANEL UNIT. (See Section 3.2.2.) Remove the HOUSING ASSEMBLY, UPPER. (See Sectio...
Page 98 - MAIN; Card
3.2.6 Removing the BOARD ASSEMBLY, MAIN [STEP 1] [STEP 21 [STEP 31 [STEP 41 51 [STEP 61 71 [STEP 81 [STEP 9] Remove the PAPER GUIDE ASSEMBLY, top cover, front cover, paper eject cover, and tractor unit. (See Section 3.2.1.) Remove the PANEL UNIT. (See Section 3.2.2.) Remove the HOUSING ASSEMBLY, UPP...
Page 100 - Platen Gap Adjustment; Bidirectional Alignment Adjustment; Figure 4-3. Bidirectional Alignment Adjustment
REV.-A CHAPTER 4 ADJUSTMENTS 4.1 Adjusting the Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1 Platen Gap Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Page 101 - Adjusting the Printer Mechanism
REV.-A 4.1 Adjusting the Printer Mechanism This section describes the various adjustments required to keep the printer mechanism in optimum condition. 4.1.1 Platen Gap Adjustment If you rotated or reassembled the carriage guide shaft or the PARALLELISM ADJUSTMENT BUSHING, or ifprinting is abnormal, ...
Page 102 - Figure 4-1. PARALLEUSM ADJUSTMENT BUSHING; Bidirectional Alignment Adjustment; Overview of the Bidirectional Alignment Adjustment; The; Since; rewritten after each adjustment.
LEVER, G, ADJUST Figure 4-1. PARALLEUSM ADJUSTMENT BUSHING 4.2 Bidirectional Alignment Adjustment This section describes how to adjust the bidirectional print position to ensure correct printing. 4.2.1 Overview of the Bidirectional Alignment Adjustment ..- The 170 prints characters when the carriage...
Page 103 - Bidirectional Alignment Adjustment Procedure
4.2.2 Bidirectional Alignment Adjustment Procedure The FX-870/l 170 provides bidirectional alignment adjustment YOU PaPer and run the p r o g r a m , t h e p r i n t e r a u t o m a t i c a l l y f e e d s t h e p a p e r a n d p r i n t s s o m e p a t t e r n s . Y o u u s e t h e p r i n t o u t ...
Page 108 - Repair by Unit Replacement; printer; problems can be corrected by replacing the defective unit. First,
REV.-A 5.2 Repair by Unit Replacement Most printer problems can be corrected by replacing the defective unit. First, the problem from the symptoms you observe using the table below. Then, follow the instructions in the corresponding flowchart to correct the problem. Table 5-3. Symptoms and Flowchart...
Page 110 - Flowchart (2) carriage operation abnormal; Note: If any coils in the CR motor are shorted, also test the
Flowchart (2) carriage operation abnormal START CN3, 4, 5, 6, 7, 8, 9, and 13 connecting the BOARD MAI Secure the connectors. and the printer mechanism Yes problem corrected? coil resistance correct (5 ohms +/- 7 at room Replace the BOARD M A I N . END problem corrected? v Refer to Section 5.5,Repai...
Page 112 - coil resistance correct; Note: If any coils in the PF motor are
REV.-A Flowchart (4) paper feeding abnormal Load the paper correctly. Insert connector CN6 correctly. coil resistance correct (63 ohms 3 at room Replace the PF motor. smoothly when the printer Repair the BOARD MAIN. I END No Refer to Section 5.5, Repairing thePrinter Mechanism. Yes END v END Note: I...
Page 114 - while holding down the
REV.-A Flowchart (6) incorrect printing of data sent from host computer Note: The host computer is assumed to be operating normally. START Perform the self test (Turn on the printer while holding down the PAPER FEED button). See Section 5.3 self test correctly? through 5.5. Check the printer’s defau...
Page 115 - Repairing the Board Assembly,
5.3 Repairing the Board Assembly, This section provides instructions for repairing the BOARD ASSEMBLY, REV.-A It describes various problems, likely causes, checkpoints, and solutions. The checkpoint column provides proper waveforms, resistance values, and other information for each component of the ...
Page 116 - Checkpoint
Table 5-4. Repairing the BOARD ASSEMBLY, C076 (Continued) Problem The voltage of the +35 V line is below thespecifiedvalue. Cause ICI, is dead. Checkpoint Check the voltage waveforms at CH1=O.2V Check the voltage waveforms at I 1 1 Solution Replace or Replace
Page 117 - Problem
Table 5-4. Repairing the BOARD ASSEMBLY, C076 (Continued) Problem Cause +35 V line is is dead. or is Checkpoint the +35 V line. t h e o s c i l l a t i o n w a v e f o r m pin 5) and the s w i t c h i n g w a v e f o r m pin 8 ) . I I I I I I I I CH1=2V CH2=20V Check the switching waveform at emitte...
Page 118 - Either the; or the
REV.-A 5.4 Repairing the Board Assembly, MAIN This section provides instructions for repairing the BOARD ASSEMBLY, MAIN. It describes various problems, symptoms, likely causes, checkpoints, and solutions. The checkpoint column provides proper waveforms, resistance values, and other information for e...
Page 122 - Repairing the Printer; This section provides instructions; Check the; with
5.5 Repairing the Printer This section provides instructions Mechanism for repairing the printer mechanism. It describes various problems, symptoms, likely causes, checkpoints, and solutions. The checkpoint column shows the items to be checked, including the proper values to be set for each componen...
Page 123 - or
REV.-A Table 5-6. Repairing the Printer Mechanism (Continued) Problem symptom Cause Checkpoint Solution Self test printing The carriage The c o m m o n w i r e s C h e c k t h e c o m m o n R e p l a c e t h e F F C . a b n o r m a l . m o v e s , b u t t h e s e l f - i n t h e p r i n t h e a d F ...
Page 126 - Table
REV.-A 6.1 Preventive Maintenance Preventive maintenance involves occasionally vacuuming the printer mechanism to remove dust and paper debris and regularly cleaning the case exterior with denatured alcohol. After cleaning the unit, check that it is properly lubricated as described in Section 6.2, b...
Page 127 - The arms and tab of the RD ASSEMBLY
REV.-A Table 6-2. Lubrication Points Ref. No. Lubrication Points Lubricant 1 Platen gap adjustment slots on the FRAME G-26 (excluding the two slots at the bottom) 2 The arms and tab of the RD ASSEMBLY G-26 3 The shaft end of the ROLLER ASSEMBLY, DRIVE G-26 4 The ribbon drive gear train G-26 5 The OI...
Page 129 - Circuit Diagram
REV.-A APPENDIX Connector Summary . . . ... . . . . . . . . . . . . . . . . . . . . . . Circuit Diagrams . . . . . . . . . ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Circuit Board Component Layout . . . . . . . . . . . . . . . . Outline Drawing . . . . . . . . . . . . . . . . . . ...
Page 130 - A.1 Connector Summary; and sizes of the connectors.; PRINTHEAD; PRINTER MECHANISM
A.1 Connector Summary Figure A-1 illustrates the interconnection of the primary components. Table A-1 summarizes the functions and sizes of the connectors. BOARD ASSEMBLY, C076 PSB/PSE I I BOARD ASSEMBLY, MAIN I I DETECTOR, ‘E (Front) 1 PRINTHEAD PRINTER MECHANISM I BOARD ASSEMBLY, PNL Figure A-1. C...
