EPSON Stylus PHOTO 950
Revision A
TROUBLESHOOTING
Overview
72
2
Is the FFC
disconnected or
almost
disconnected
from the junction
board on the
underside of the
carriage?
CN1 is the connector that handles the input and output of signals
between the main board and the mechanism. It inputs the
various encoder signals to the main board from the mechanism,
and outputs head drive signals from the main board.
3
Is the rotary
scale not moving
in between the
PF encoder
(photo coupler)
parts?
(or is the area
around the photo
sensor clear of
problems?)
If the rotary scale is not inside the photo sensor, the PF motor
will operate at high speed and the mechanism may become
overloaded, resulting in a fatal error. 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.
4
Check if CN8
(white: 4-pin) on
the main board is
disconnected.
CN8 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.
Table 3-10. Countermeasures when a fatal error occurs
Step
Check Point
Remedy
Junction Board
CN1
Rotary Scale
Photo Coupler
Check Point 1
Check Point 2
5
Is CN9 (FFC) on
the main board
disconnected or
almost
disconnected?
CN9 on the main board is a connector that transmits the
feedback signal from the carriage encoder to the main board as
well as transmitting the head drive signals. Accordingly, if this
connector is disconnected, the result is the same as if there is a
malfunction of the carriage encoder.
6
Is there a
malfunction of
the CR motor?
Use an ohmmeter to check the resistance value of the coil inside
the carriage motor.
Resistance value: 23.0ohms +/- 25% (DC)
NOTE:
Look carefully at the whole of the coverings of the two
harnesses, and make sure that there are no holes
anywhere in the coverings. If a hole is found anywhere,
measure the internal coil resistance and replace just the
harness if the resistance value is normal. (However,
none of the harnesses for the spare parts motors are
supplied as single parts.)
Table 3-10. Countermeasures when a fatal error occurs
Step
Check Point
Remedy
Содержание Stylus Photo 950
Страница 1: ...EPSONStylusPHOTO950 Color Inkjet Printer SEIJ01 015 SERVICE MANUAL ...
Страница 5: ...Revision Status Revision Issued Date Description A April 5 2002 First Release ...
Страница 8: ...C H A P T E R 1 PRODUCTDESCRIPTION ...
Страница 25: ...C H A P T E R 2 OPERATINGPRINCIPLES ...
Страница 53: ...C H A P T E R 3 TROUBLESHOOTING ...
Страница 91: ...C H A P T E R 4 DISASSEMBLYANDASSEMBLY ...
Страница 132: ...C H A P T E R 5 ADJUSTMENT ...
Страница 158: ...C H A P T E R 6 MAINTENANCE ...
Страница 174: ...C H A P T E R 7 APPENDIX ...
Страница 188: ......
Страница 189: ......
Страница 190: ......
Страница 191: ......