Sc Table - Gestetner B147 Service Manual

4.4 SC TABLE

SC No. Item
SC 101 Exposure lamp
• The standard white level is
error
SC 120 Scanner home • The scanner home position
position error 1
SM
Definition
• Exposure lamp
not properly detected when
scanning the shading plate. • Lamp stabilizer
(The shading data peak
does not reach the specified
• Exposure lamp
threshold.)
• Standard white plate
• Scanner mirror or
• SBU defective
• Scanner I/O board or
sensor does not detect the
on condition during
• Scanner motor
scanning.
• Harness between
• Scanner HP sensor
• Harness between
• Scanner wire, timing
Related
Possible Cause
SCs
defective
defective
connector defective
dirty
scanner lens out of
position or dirty
SC 121
and 122
SBU defective
defective
scanner I/O board
and scanner motor
disconnected
defective
SBU and HP sensor
disconnected
belt, pulley, or
carriage defective
4-11
Troubleshooting Procedure
1. Turn the main switch off and on.
2. Turn the power key off and on.
3. Check and clean the scanner
mirror(s) and scanner lens.
4. Check and clean the shading plate.
5. Replace the exposure lamp.
6. Replace the lamp stabilizer.
7. Replace the scanner mirror(s) or
scanner lens.
8. Replace the SBU.
1. Turn the main switch off and on.
2. Check the cable connection between
the scanner I/O board and scanner
motor.
3. Check the cable connection between
the SBU and HP sensor.
4. Replace the SBU or scanner I/O
board.
5. Replace the scanner motor.
6. Replace the HP sensor.
7. Replace the scanner wire, timing belt,
pulley, or carriage.
SC TABLE
Type
D
D
B147/B149/B190