Ricoh Aficio Color 4006, Service Manual

Page: 447 / 487

24 February 1999 SC CODES
11
SC
No.
Item Detection Conditions Possible Causes
Related
SCs
Troubleshooting Procedure Type
SC361 Revolver HP
sensor error
- Timing & Condition -
The home position is not
detected during 3 revolutions
of the revolver unit after the
revolver motor turns on.
•
Poor connection of
connector
•
Dirty sensor
•
Defective sensor
•
Defective revolver
motor
•
Defective revolver
drive board
•
Defective I/O
control board
•
Defective main
control board
1. Check if the sensor connector is properly connected.
2. Replace the revolver H.P. sensor if the voltage at
CN203-A4 on the I/O control board does not change
when covering the sensor with a piece of paper.
NOTE: Make sure that the revolver unit is locked for
this step.
3. If the revolver unit does not rotate;
1 Replace the revolver motor.
2 Replace the revolver motor drive board.
3 Replace the I/O control board.
4 Replace the main control board.
- Signals to Check -
•
Revolver H.P.: CN203-A4 or TP211 on I/O control
board
D
SC385 ID sensor
VSG
adjustment
error
- Timing -
During process control self
check, the main control board
detects that the Vsg signal fed
back from the ID sensor is out
of range.
•
Dirty ID sensor
•
Poor connection of
connector
•
Defective ID
sensor
•
Poor cleaning
1. Clean the ID sensor.
2. Check if the sensor connector is properly connected.
3. Replace the ID sensor.
4. Check the drum cleaning unit.
- Signals to Check -
•
ID sensor LED: CN203-B9 or TP252 on I/O control
board
•
ID sensor 1 (K ): CN203-B10 or TP227 on I/O control
board / TP174 on main control board.
•
ID sensor 2 (CMY): CN203-B11 or TP229 on I/O
control board / TP173 on main control board.
D