Epson FX-870/1170 User Manual Page 55
- Page / 181
- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
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Troubleshooting
Table 3-2. Sensor Test Points
Sensor
Test Method
Connector
(Set Meter to Ohms.
Number
Check with Printer Power Off.)
Release
Lever
Place one lead on each pin. Change the release
(CN4)
lever position.
Platen Gap Place one lead on each pin. Change the adjust
(CW
lever position.
CR Home Place one lead on each pin. Move carriage to and
(CN7)
away from home position.
Front PE Place one lead on each pin. Toggle sensor by
(CN3)
inserting and removing paper.
Sensor Test Method
Connector (Set Meter to Volts.
Number
Check with Printer Power On.)
Rear PE
Place one lead on pin 3 (GND) and one on pin 2
W9)
(PER). Toggle by inserting and removing paper.
Note:
Illustrations later in this chapter show sensor locations.
Motor
Connector
Number
Carriage
Motor
(CN13)
Paper Feed
Motor
VW
Meter Reading
Meter should toggle between
open and short.
Meter should toggle between
open and short.
Meter should toggle between
open and short. (Closed
=
active.)
Meter should toggle between
open and short. (Open = active.)
Meter Reading
Meter should toggle between 0 V
and HIGH.
Table 3-3. Motor Test Points and Coil Resistance
Common
Pin
Numbers
5
6
5
Test Pin
Numbers
1,2,3,4
1 and2
3and4
Test Method
(Set Meter to Ohms. Disconnect
Motor from Main Board and Check
it with Printer Power Off.)
Meter Reading
Place one lead on pin 5 and the other lead
5R
*7%
on each of the four test pins to check the
(at
77”
F,
four motor phases.
25” C)
Put one lead on pin 6 and the other lead
6352
*352
on pin 1 and then on pin 2.
(at
77”
F,
Put one lead on pin 5 and the other lead
25” C)
on pin 3 and then on pin 4.
Notes: l
Common pins may be reversed. If you do not obtain the proper reading with one common, try
the other common for that motor. If you still do not obtain proper readings, the motor is bad.
l If any phase of the motor is shorted, see Table 3-6 to check the main board. (If the drivers on
the main board are also shorted, and the board is not replaced at the same time as the motor,
the short in the main board drivers may burn out the new motor.)
3-2
Epson
FX-670/1170
- 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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