Kyocera KM-4035

2FD/2FF/2FG
1-5-38
(1) No image appears
(entirely white).
Causes
1. No transfer charging.
2. No LSU laser is output.
3. No developing bias is output.
Causes Check procedures/corrective measures
1. No transfer charging.
A. The connector terminals of the high-voltage
transformer PCB make poor contact.
B. Defective main PCB.
C. Defective high-voltage transformer PCB.
2. No LSU laser is output.
A. Defective laser scanner unit.
B. Defective main PCB.
3. No developing bias is output.
A. Defective main PCB.
B. Defective high-voltage transformer PCB.
Reinsert the connector. Also check for continuity within the
connector cable. If none, remedy or replace the cable.
Check if YC7-10 on the main PCB goes low when maintenance item
U101 is run. If not, replace the main PCB.
Check if transfer charging takes place when CN1-10 on the high-
voltage transformer PCB goes low while maintenance item U101 is
run. If not, replace the high-voltage transformer PCB.
Replace the laser scanner unit.
Check if YC8-4 on the main PCB goes low when maintenance item
U101 is run. If not, replace the main PCB.
Check if YC7-1 on the main PCB goes low when maintenance item
U101 is run. If not, replace the main PCB.
Check if developing bias voltage is output when the main PCB is
normal while maintenance item U101 is run. If not, replace the high-
voltage transformer PCB.