Gestetner G060 Service Manual page 497

SC No. Item
SC 221 Synch. detection
signal error 2
221-1: Y
221-2: M
221-3: C
221-4: K
SM
Definition
• Damaged or
Main scan length detection
is not properly completed
ten consecutive times.
The front (for C&M) or rear
(for K&Y) laser
synchronizing detector
• Incorrect installation
boards are used for the
main scan length detection,
which automatically corrects
the main-scan magnification.
• Defective front (C&M)
• Defective LD unit
Related
Possible Cause
SCs
disconnected cable
between front (C&M)
or rear (K&Y) laser
synchronizing
detector board and
the LD unit
of front (C&M) or rear
(K&Y) synchronizing
detector board (the
beam does not target
the photo detector.)
or rear (K&Y)
synchronizing
detector board
4-15
Troubleshooting Procedure
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 2-919-1)
SC TABLE
Type
B
G570