Gestetner B070 Service Manual page 338

SERVICE CALL CONDITIONS
SC354: ID Sensor Error 5
Definition [D]
Vsg is not adjusted to target (4.0 ± 0.2 V) within 20 s during V
NOTE: 1) The most recent PWM value is used for control.
2) The values displayed with SP3103 (ID Sensor Output Display) are the
actual values.
Possible Causes
• ID sensor defective
• ID sensor connector defective
• Poor ID sensor connector connection
• IOB defective
• LD unit defective
• BCU defective
• CBG power pack defective
• Dirty ID sensor
SC355: ID Sensor Voltage Error
Definition [B]
The ID sensor voltage (Vp) exceeds 800 V for 10 continuous counts.
Possible Causes
• Drum potential sensor defective
• IOB defective
• Poor drum unit connection or connectors defective
• Poor drum ground connection
• LD defective
• Poor drum cleaning ground connection
• Drum worn
• Dirty laser optics
SC400: Transfer Bias Roller Leak
Definition [B]
After the transfer current begins, the value of the transfer current set with SP2301
(Transfer Current Adjustment) exceeds the specified setting, and feedback voltage
lower than 0.75V is detected for 16 counts (about 100 ms).
Possible Causes
• CBG power pack defective
• Poor connection between the transfer current terminal and the transfer
power pack.
B070/B071
CÓPIA NÃO CONTROLADA
4-18
CÓPIA NÃO CONTROLADA
checking.
SG
SM