Epson Aculaser C9200N, Service Manual

Page: 117 / 441

EPSON AcuLaser C9200N Revision D
Troubleshooting Service Call Error 117
Confidential
E406: ABNORMALLY LOW TONER DENSITY DETECTED BLACK TCR
SENSOR
E407: ABNORMALLY HIGH TONER DENSITY DETECTED BLACK TCR
SENSOR
Relevant Electrical Parts
†
Photoconductor Unit /K
†
Toner Supply Motor C/K (M7)
†
Mechanical Control Board (PWB-M)
†
Controller Board (PWB-P)
Step Action
Connection Diagram
Control Signal
Location
(electrical parts)
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 PWB-M CNDM3-10 to 13 C-23
4 Reinstall Photoconductor Unit --- ---
5 Change Photoconductor Unit /K --- ---
6 Change PWB-M (p.198) --- ---
7 Change PWB-P (p.198) --- ---
Relevant Electrical Parts
†
Photoconductor Unit /K
†
Mechanical Control Board (PWB-M)
†
Controller Board (PWB-P)
Step Action
Connection Diagram
Control Signal
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 --- ---
4 Change PWB-M (p.198) --- ---
5 Change PWB-P (p.198) --- ---