Utax CD 1230, Service Manual

Page: 165 / 302

2GN/2GP/2GR
1-4-52
(6)
The exposure lamp
does not turn on or
off. 1. Poor contact in the con-
nector terminals.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
2. Defective scanner PWB. Run maintenance item U061 and check if YC6-3 on the scanner
PWB goes low. If not, replace the scanner PWB.
If YC6-3 on the scanner PWB is always low, replace the scanner
PWB.
3. Defective inverter PWB. Run maintenance item U061 and check if the exposure lamp turns
on with YC1-3 on the inverter PWB go low. If not, replace the
inverter PWB.
If the exposure lamp does not turn off with YC1-3 on the inverter
PWB high, replace the inverter PWB.
4. Defective exposure lamp. Replace the exposure lamp even if checking or correcting other
measures.
(7)
Main charging is not
performed. 1. Broken main charger
wire.
(See page 1-4-45.)
2. Leaking main charger
housing.
3. The connector terminals
of the high voltage PWB
make poor contact.
4. Defective engine PWB.
5. Defective high voltage
PWB.
(8)
No developing bias is
output. 1. The connector terminals
of the high voltage PWB
make poor contact.
(See page 1-4-45.)
2. Defective engine PWB.
3. Defective high voltage
PWB.
(9)
Transfer charging is
not performed. 1. The connector terminals
of the high voltage PWB
make poor contact.
(See page 1-4-45.)
2. Defective engine PWB.
3. Defective high voltage
PWB.
(10)
The original size is
not detected cor-
rectly. 1. Original is not placed cor-
rectly.
Check the original and correct if necessary.
2. Poor contact in the origi-
nal detection switch or
original size detection
sensor connector termi-
nals.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
3. Defective original detec-
tion switch.
If the level of YC4-5 on the scanner PWB does not go low when
the original detection switch is turned on and off, replace the origi-
nal detection switch.
4. Defective original size
detection sensor.
Check if sensor operates correctly. If not, replace it.
Problem Causes Check procedures/corrective measures