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DFX-85w
Tsbk 5-6. GE04 MAINIDRVIDRV-B boards Component Repair 6/7
Symptom
I
cause
I
Checkpoint
I
Solution
Paper feeding is
The CPU IC2) on the Check the PF motor phase drive
abnormal.
Replace IC2.
C204 MAIN board is
signals at pins 2 - 5 of IC2.
defective.
IC2 on the C204 DRV At IC2. check the output signals for
Replace IC2.
board is defective.
pins 2 (OUT-A), 3 (OUTXA), 6
(OUT-B), and 7 (OUTXB).
Ribbon feeding is The CPU IC2) on the
Check the RF motor phase drive
Replace IC2.
abnormal. C204 MAIN board is
signals at pins 6 9 of IC2.
defeciie.
The common
Check the collector voltage of 021.
Replace Q20 or
switching transistor on
Q21.
the C204 DRV board
is defective.
The phase switching
For transistors Q22 - Q25, observe the
if there is no output
transistor on the C204 input signal from the CPU (base) and
DRV board is
signal, replace the
the output signal (collector).
abnormal transistor.
defective.
Fuse Fl on the C204
Check if fuse Fl is defective.
Replace Fl.
DRV board is
defective.
5-20
Rev. A