Epson AcuLaser C9200N Service Manual page 117

EPSON AcuLaser C9200N
E406: ABNORMALLY LOW TONER DENSITY DETECTED BLACK TCR
SENSOR
Photoconductor Unit /K
Toner Supply Motor C/K (M7)
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 M7 operation check
4 Reinstall Photoconductor Unit
5 Change Photoconductor Unit /K
6 Change PWB-M (p.198)
7 Change PWB-P (p.198)
Troubleshooting
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Relevant Electrical Parts
Mechanical Control Board (PWB-M)
Controller Board (PWB-P)
Connection Diagram
Control Signal
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PWB-M CNDM3-10 to 13
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E407: ABNORMALLY HIGH TONER DENSITY DETECTED BLACK TCR
SENSOR
Photoconductor Unit /K
Mechanical Control Board (PWB-M)
Step
Location
(electrical parts)
--- 1 Clean the TCR Sensor window on the
underside of the Photoconductor Unit
if dirty.
---
2 Reinstall Photoconductor Unit
3 Change Photoconductor Unit /K
C-23
4 Change PWB-M
---
5 Change PWB-P
---
---
---
Service Call Error
Relevant Electrical Parts
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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117
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