Gestetner G060 Service Manual page 505

SC No. Item
SC 490 Transfer bias /
paper attraction
roller bias leak
error
SC 501 Paper Tray 1
error
SC 502 Paper Tray 2
error
SM
Definition
• Defective high
The high voltage supply
board (T/PA/CL) monitors
the circuit and detects
• Damaged transfer
current leaks. If this
happens, the high voltage
• Transfer unit
supply board sends a SC
signal (High to Low at • Damaged high
CN213-8) to the BCU.
• Damaged cables
The BCU monitors this
signal every 2 ms and
generates this SC code
• Defective BCU
when the error condition
occurs 250 consecutive
times.
• Defective paper lift
When the tray lift motor is
turned on, if the upper limit
• Defective tray lift
is not detected within 10
seconds, the machine asks
• Defective bottom
the user to reset the tray. If
this condition occurs three
consecutive times, the SC is
generated.
Related
Possible Cause
SCs
voltage supply board
(T/PA/CL)
belt
voltage supply cables
between the BCU and
high voltage supply
board
sensor
motor
plate lift mechanism
4-23
Troubleshooting Procedure
1. Turn the main switch off and on.
2. Check the transfer unit and replace
the belt and/or the transfer unit if any
damage is found.
3. Replace the high voltage supply
board (T/PA/CL).
4. Check and/or replace the high voltage
supply cables.
5. Check and/or replace the dc cables
between the BCT and high voltage
supply board.
6. Replace the BCU.
1. Turn the main switch off and on.
2. Check if the bottom plate smoothly
moves up and down manually.
3. Check and/or replace the paper lift
sensor.
4. Check and/or replace the tray lift
motor.
SC TABLE
Type
B
B
G570