Panasonic UF-5500 Service Manual page 133

11.2.3.4. INFO CODE=021
"INFO CODE=021" means that the FAN does not run or the running of the FAN cannot be detected normally.
The running of the FAN is detected by IC300-AC20 and W24pin.
After repairing, copy. If "INFO CODE=021" is displayed, check again.
After the LCD indicates "INFO CODE=021" , turn the power OFF/ON.
INFO CODE=021
Check of the right FAN.
Does the Right
FAN run in the
FAN TEST: 4?
Yes
Is the pulse
No
output from the
CN508-6pin?
Yes
Check R569,
R570, C559, IC300.
INFO CODE=021
Check of left FAN.
Does the Left
FAN run in the
FAN TEST: 2?
Yes
Is the pulse
No
output from the
CN506-2pin?
Yes
Check R521,
R531, C517,
IC300.
No
Replace the
Replace the FAN.
Right FAN.
No
Replace the
Replace the FAN.
Left FAN.
Is 22V output
No
supplied to the
from the
IC504-3pin?
CN508-5pin?
Yes
Check R508, R513, IC504,
Q512,R532, R529, Q510,
R525, R568, R505, R507
Is 22V output
No
supplied to the
from the
IC504-3pin?
CN506-3pin?
Yes
Check R508, R513, IC504,
Q512,R532, R529, Q510,
R525, R568, R505, R507
133
UF-5500 / 4500
Is 3.3V
No
Yes
Check IC300,
R530.
Is 3.3V
No
Yes
Check IC300,
R530.