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DFX-8500
Rev. B
5-1
6
5.2.2 C204 MAIN/DRV/DRV-B Boards Repair
Table 5-6 indicates major components which is used for the C204 MAIN/DRV/DRV-B boards and Table 5-7
shows the C204 MAIN/DRV/DRV-B boards component level troubleshooting.
Table 5-6. C204 MAIN/DRV/DRV-B boards Component Repair 1/7
Symptom Cause Checkpoint Solution
The printer does
not operate at all.
The DRERR signal
was sent to the C204
power supply board
(HIGH level turns off
the power supply).
Check the logic level of the DRERR
signal at CN10 or check the VP1 and
VP2 voltage.
Replace the head
driver on the C204
MAIN board (VP1)
or C204 DRV-B
board (VP2).
The PD signal was
sent to the C204
power supply board.
(HIGH level turns off
the power supply)
Check the logic level of the PD signal
during power on and verify the voltage
waveform for the head driver. (Refer to
the head driver waveform figure,
above.)
Replace the head
driver or gate array.
The reset circuit is not
operational (for logic).
Check the logic level at pin1 (VOUT) of
IC13.
Replace IC13.
The driver circuits
don’t operate at
all.
The pull up voltage
VX is not generated.
When the collector of Q15 is high
Check the logic level at collector of Q14
(VX) (When the collector of Q15 is
high, VX is HIGH..
Replace Q15.
Serial interface is
dead.
The level converter IC
is defective.
Check the signal level change between
in and out port of the IC9.
Replace IC9.