Service manual

30 July, 2001 SC TABLE
4-9
4.3 SC TABLE
SC No. Item Definition Possible Cause
Related
SCs
Troubleshooting Procedure Type
SC195 Serial Number
Mismatch
• Serial number stored in the
memory does not consist of
the correct code.
• EEPROM defective
• BCU replaced without
original EEPROM
Open the front cover and turn on the
main switch. Check the serial number
with SP5-811-002.
If the stored serial number is incorrect,
contact your product specialist for
details of how to solve the problem.
SC201 Polygon motor
error
• The polygon mirror motor
does not reach the targeted
operating speed within 15
seconds after turning on.
• The lock signal does not
become low within 15
seconds after turning off the
polygon motor. .
• Polygon mirror motor
error
• Abnormal GAVD
behavior
• Cable disconnection
1. Turn the main switch off and on.
2. Check the cables.
3. Replace the polygon motor.
SC220 Synch.
detection
signal error 1
220-001: Y
220-002: M
220-003: C
220-004: K0
220-005: K1
The front (for K&Y) or rear (for
C&M) laser synchronizing
detector board, which is used
to determine the start timing of
laser writing, does not send a
signal while the polygon motor
is operating normally and the
LD is on.
• Disconnection of the
cable between front
(K&Y) or rear (C&M)
synchronizing
detector board and
the LD unit
• Incorrect installation
of front (K&Y) or rear
(C&M) synchronizing
detector board (the
beam does not target
the photo detector.)
• Defective LD unit
• Defective BCU
1. Turn the main switch off and on.
2. Check the cable connection between
front (for K&Y) or rear (for C&M)
synchronizing detector board and the
LD unit.
3. Check or reinstall the front (for K&Y)
or rear (for C&M) synchronizing
detector board.
4. Replace the front (for K&Y) or rear
(for C&M) synchronizing detector
board.
5. Replace the LD unit.
6. Replace the BCU.