Gestetner G060 Service Manual page 494

SC TABLE
SC No. Item
SC 121 Scanner home
position error 2
(CF)
SC 122 Scanner home
position error 3
(CF)
G570
Definition
• The scanner home • Scanner PSU or SBU
position sensor does not
• Scanner motor
detect the off condition
during scanning.
• Harness between
• Scanner HP sensor
• Harness between
• Scanner wire, timing
• The scanner home • Scanner PSU or SBU
position sensor does not
• Scanner motor
detect the home position
during initialization.
• Harness between
• Scanner HP sensor
• Harness between
• Scanner wire, timing
Related
Possible Cause
SCs
SC 120
and 122
defective
defective
scanner PSU and
scanner motor
disconnected
defective
SBU and HP sensor
disconnected
belt, pulley, or
carriage defective
SC 120
and 121
defective
defective
scanner PSU and
scanner motor
disconnected
defective
SBU and HP sensor
disconnected
belt, pulley, or
carriage defective
4-12
Troubleshooting Procedure
1. Turn the main switch off and on.
2. Check the cable connection between
the scanner PSU and scanner motor.
3. Check the cable connection between
the SBU and HP sensor.
4. Replace the SBU or scanner PSU.
5. Replace the scanner motor.
6. Replace the HP sensor.
7. Replace the scanner wire, timing belt,
pulley, or carriage.
1. Turn the main switch off and on.
2. Check the cable connection between
the scanner PSU and scanner motor.
3. Check the cable connection between
the SBU and HP sensor.
4. Replace the SBU or scanner PSU.
5. Replace the scanner motor.
6. Replace the HP sensor.
7. Replace the scanner wire, timing belt,
pulley, or carriage.
Type
B
B
SM