Epson FX-870/1170 User Manual Page 139
- Page / 181
- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
Rated. / 5. Based on customer reviews
Principles of Operation
Table 6-5 lists the fimctiona of the main
componente
of the CO94 MAIN.
Table
6-5. Functions
of
Main
Components
of
CO94
MAIN
IC
or
Circuit
Functions
TMP90C041
F
(2Cl)
Receives data from the host computer and
loads
it to the input buffer in
RAM. Expands the input data held in the buffer to create image data.
Loads the image data to the image buffer in RAM. Transfers the image
datato
the printhead drive circuit. Also controls various printer mechanism
parts, such as the motors.
E05A66YA (IC4)
PROM (iC3)
RAM (iC2)
E2PROM
(XI)
This gate array mainly performs the following five functions:
l Memory management
l Centronics
I/F
control
l Control panel control
l
E2PROM
control
l
Printhead drive circuit control
The PROM contains the program that runs the CPU.
The RAM contains the CPU working area and the buffers.
The
E*PROM
is used to store information such as the top-of-form
position.
UPAl475H
(ICl)
Drive circuit for PF motor
SLA7024M
(iC5)
Drive circuit for CR motor
-
-
6-24
Epson
FX-87W1170
- FX-870/1170 1
- FCC Compliance Statement 2
- Copyright Notice 3
- Trademarks 3
- Precautions 4
- How to Use this Manual 5
- EptmnFX-870/1170 6
- Numbers and Addresses 7
- Contents 8
- Removing the Panel Unit 9
- Printer Features 10
- List of Figures 11
- List of Tables 11
- 80-column model 14
- 136-column model 14
- Hardware Specifications 15
- FX-8700170 20
- 0.12” (3.0 mm) or more 22
- EpsonFX-870/1170 22
- Epson FX-8700170 24
- Interfaces 25
- Control Panel 29
- Default Settings 32
- Position 1 (3rd step) 37
- Printer Initialization 38
- Table 1-21. Buzzer Functions 39
- Main Components 40
- ,,DAld-lfil-l 41
- Epson FX-87011170 42
- Housing Assembly 44
- Chapter 2 48
- Site Requirements 49
- The Correct Power On Sequence 49
- Parallel Cables 50
- Serial Cables 50
- Serial Cable 51
- Tips to Increase Printer Life 52
- Troubleshooting 53
- Troubleshooting 3 54
- Table 3-2. Sensor Test Points 55
- Error Codes 58
- Problem Isolation 59
- Serial Communications Errors 60
- Possible Cause 61
- 3-10 Epson 63
- Self-Test 66
- Chart 6. Data 68
- Host is Printed Incorrectly 68
- FX-870/i 70
- Connector Locations 71
- Sensor Locations 72
- Figure 3-5. Platen Gap Sensor 73
- Disassembly and Assembly 78
- Disassembly and Assembly 4 80
- Service Checks After Repair 81
- Screw Specifications 82
- Removing the Printhead 86
- Removing the 87
- Insertion 93
- Printer Mechanism 97
- Arranging the Cables 100
- Disassembly 103
- Assembly 103
- Epson FX-870/1170 103
- Adjustments, Maintenance, and 105
- Lubrication 105
- Platen Gap Adjustment 106
- Preventive Maintenance 110
- Table 5-2. Lubrication Points 111
- Principles of Operation 113
- Carriage Mechanism 118
- Paper Handling Mechanisms 120
- Ribbon Advance Mechanism 133
- Power Supply Operation 134
- Pfinciples of Operation 135
- Secondary 136
- Control Circuit Operation 137
- E05A66YA (IC4) 139
- FX-87W1170 139
- Sensor Circuits 141
- Carriage Motor Drive Circuit 142
- Printhead Drive Circuit 144
- Parallel Interface Circuit 144
- PROM Control Circuit 145
- CH1=50V TIME=2ps 146
- Reference Materials 153
- Reference Materials 7 154
- Circuit Diagrams 158
- Circuit Diagram 159
- C076 PSB Power Supply Board 160
- CO76 PSB Power Supply Board 161
- Figure 7-6 162
- Figure 7-7 163
- Outline Drawings 166
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