Epson AcuLaser C9200N Service Manual page 116

EPSON AcuLaser C9200N
E400: ABNORMALLY LOW TONER DENSITY DETECTED CYAN
TCR SENSOR
E402: ABNORMALLY LOW TONER DENSITY DETECTED
MAGENTA TCR SENSOR
E404: ABNORMALLY LOW TONER DENSITY DETECTED
YELLOW TCR SENSOR
Relevant Electrical Parts
Photoconductor Unit/C
Photoconductor Unit/M
Photoconductor Unit/Y
Toner Supply Motor Y/M (M6)
Step Action
1 Perform image
troubleshooting procedure if
image density is low.
2 Clean the TCR Sensor
window on the underside of
the Photoconductor Unit if
dirty.
3 M6, M7 operation check
4 Reinstall Photoconductor
Unit.
5 Change Photoconductor Unit.
6 Change PWB-M (p.198)
7 Change PWB-P (p.198)
Troubleshooting
Toner Supply Motor C/K (M7)
Mechanical Control Board (PWB-M)
Controller Board (PWB-P)
Connection Diagram
Location
Control Signal
(electrical parts)
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PWB-M CNDM2-10 to 13(M6)
PWB-M CNDM3-10 to 13(M7)
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E401: ABNORMALLY HIGH TONER DENSITY DETECTED CYAN
TCR SENSOR
E403: ABNORMALLY HIGH TONER DENSITY DETECTED
MAGENTA TCR SENSOR
E405: ABNORMALLY HIGH TONER DENSITY DETECTED
YELLOW TCR SENSOR
Photoconductor Unit/C
Photoconductor Unit/M
Photoconductor Unit/Y
Step
1 Clean the TCR Sensor window on the
underside of the Photoconductor Unit if
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dirty.
2 Reinstall Photoconductor Unit.
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3 Change Photoconductor Unit.
4 Change PWB-M
5 Change PWB-P
C-22
C-23
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Service Call Error
Relevant Electrical Parts
Mechanical Control Board (PWB-M)
Controller Board (PWB-P)
Connection Diagram
Action
Control Signal
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(p.198) ---
(p.198) ---
Revision D
Location
(electrical parts)
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116
Confidential