Gestetner B147 Service Manual page 220

SC TABLE
SC No. Item
SC 240 LD over The power supply for the LD
240-001: Y unit exceeds 67 mA.
240-002: M
240-003: C
240-004: K
SC 260 LD HP sensor During homing, it takes more
not switched on than five seconds to switch the
(for K only) HP sensor on (the sensor
actuator does not cover the
sensor).
SC 261 LD HP sensor After the laser beam pitch was
not switched off changed, it takes more than
(for K only) five seconds for the HP sensor
to switch off.
B147/B149/B190
Definition Possible Cause
• LD worn out
(current/light output
characteristics have
changed.)
• LD broken (short
circuit)
• Defective motor
• Defective sensor
• Mechanical problem
when switching the
actuator
• Brown fuse (FU81) on
the Power supply unit
• Defective motor
• Defective sensor
• Mechanical problem
when switching the
actuator
• Brown fuse (FU81) on
the Power supply unit
Related
Troubleshooting Procedure
SCs
1. Turn the main switch off and on.
2. Replace the laser optics housing unit.
1. Turn the main switch off and on.
2. Check the sensor actuator position of
the LD positioning motor.
3. Replace the LD positioning motor.
4. Replace the LD home position
sensor.
5. Check and/or replace the PSU.
1. Turn the main switch off and on.
2. Check the sensor actuator position of
the LD positioning motor.
3. Replace the LD positioning motor.
4. Replace the LD home position
sensor.
5. Check and/or replace the PSU.
4-18
Type
D
D
D
SM