Gestetner G060 Service Manual page 124

SC TABLE
SC No. Item
SC 221 Synch. Main scan length detection is
detection not properly completed ten
signal error 2 consecutive times.
221-001: Y
221-002: M
The front (for C&M) or rear (for
221-003: C
K&Y) laser synchronizing
221-004: K
detector boards are used for
the main scan length
detection, which automatically
corrects the main-scan
magnification.
G060
Definition Possible Cause
• Damaged or
disconnected cable
between front (C&M)
or rear (K&Y) laser
synchronizing
detector board and
the LD unit
• Incorrect installation
of front (C&M) or rear
(K&Y) synchronizing
detector board (the
beam does not target
the photo detector.)
• Defective front (C&M)
or rear (K&Y)
synchronizing
detector board
• Defective LD unit
4-10
Related
Troubleshooting Procedure
SCs
After doing any of the following, print ten
jobs or more to see if the same SC code
is displayed:
1. Turn the main switch off and on.
2. Check or replace the cable
connecting front (for C&M) or rear (for
K&Y) synchronizing detector board
and the LD unit.
3. Check or reinstall the front (for C&M)
or rear (for K&Y) synchronizing
detector board.
4. Replace the front (for C&M) or rear
(for K&Y) synchronizing detector
board.
5. Replace the LD unit.
6. Replace the BCU.
If a synch. detector board cannot be
replaced, do the following as a
temporary measure:
• Disable main scan length detection
(SP 2-919-001)
Type
SM