EPSON Stylus COLOR C70/C80
Revision A
Troubleshooting
Overview
83
3.1.6.1 PF Motor Driver Abnormal 1
This section describes the procedures for solving the problem when no error occurs,
but only the PF motor operates at high speed all the time even though this has not
happened before. The PF motor is different from the carriage motor in that it does not
generate a fatal error even if the rotary encoder cannot read at all, so that the firmware
checks the bar code signal on the rotary encoder and continues providing current to the
PF motor, causing it to operate at high speed. The methods of solving this problem are
given below in order starting from the easiest, so refer to them for the checking and
working procedures.
Table 3-13. PF Motor Driver Abnormal 1
Step
Check Point
Remedy
1
Is the rotary scale not
moving in between the PF
encoder (photo coupler)
parts?
(or is there a problem
around the photo sensor?)
If the rotary scale is not inside the photo sensor, a fatal
error will occur. Check if the condition is as shown in the
illustration below or not. If the rotary scale is not inside
the photo sensor, re-adjust the rotary scale so that it is
inside the photo sensor. Furthermore, check if the
connector that transmits the signal from the rotary
encoder to the main board is disconnected.
2
Check if CN12 (white: 4-
pin) on the main board is
disconnected.
CN12 on the main board is a connector that transmits the
feedback signal from the PF encoder to the main board.
Accordingly, if this connector is disconnected, the result
is the same as if there is a malfunction of the PF encoder.
3
Is there a malfunction of
the photo coupler junction
board?
Replace the junction board shown in the above
photograph and then check the operation.
Rotary Scale
Photo Coupler
Check Point 1
Check Point 2
Содержание Stylus Color C70
Страница 1: ...EPSONStylusColorC70 C80 Color Inkjet Printer SEIJ01 004 SERVICE MANUAL ...
Страница 5: ...Revision Status Revision Issued Date Description A July 31 2001 First Release ...
Страница 9: ...C H A P T E R 1 PRODUCTDESCRIPTION ...
Страница 35: ...C H A P T E R 2 OPERATINGPRINCIPLES ...
Страница 60: ...C H A P T E R 3 TROUBLESHOOTING ...
Страница 96: ...C H A P T E R 4 DISASSEMBLYANDASSEMBLY ...
Страница 137: ...C H A P T E R 5 ADJUSTMENT ...
Страница 169: ...C H A P T E R 6 MAINTENANCE ...
Страница 182: ...C H A P T E R 7 APPENDIX ...
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