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TROuBLESHOOTllvG
Symptom
The head fan
Jperation is
Sbnormal.
Ihe PG motor
Jpera&?s
~normally.
‘he plunger is
lefective.
MAIN board is
) pins 163 (FANA) and 1’64 (FANAX) of
Table 5-6. C204 MAINIDRVIDRV-B boards Component Repair
cause
I
Checkpoint
ICl on the c204
1 Observe the PG motor chase sianal at
defective.
ICl.
QlOorQll on the
Observe the head fan phase drive
C.204 MAIN board is
voltage level for pins 25 (HFANA) and
defective.
17 (HFANB) of CNl. fThe normal
Observe the PG motor phase signal at
Check the collector voltage of Qll
the C204 DRV board
1
is defective.
The phase switching
For transistors 012 - Q15, observe the
transistor on the C204
output signal (collector).
DRV board is
~
Observe the PG sensor output signal at
The PG home
position sensor is
defective.
bfCN14:
Observe the PG HP sensor signal level
for pin 36 (PGHOME) of CN14.
(PG home = LOW level; other = HIGH
Fuse F3 is defective
level.)
Check if fuse F3 is defective.
ICl on the C204
When paper is loaded into the printer,
MAIN board is
look at the switching signal at pins 16
defective.
(PLP) and 17 (PLN)of ICl.
Plunger drive
Obsewe the 031 collector voltage at
transistor on the C204
paper loading.
DRV board is
Ssfective.
Solution
7
Replace ICl.
Replace cl10 or
Qll.
-7
sensor.
Rev. A
5-a