Printer Section: Black Copy - Konica Minolta Di1611 Service Manual

TROUBLESHOOTING
4.4.13

Printer Section: Black copy

Step
1 PC Drum Charge Corona grid mesh and Comb
Electrode are loose.
2 PC Drum Charge Corona contact is dirty, scratchy,
folded, bent, or damaged.
3 Grid bias contact is dirty, folded, or bent.
4 PC Drum ground contact is dirty, scratchy, bent, or
damaged.
5 High Voltage Unit (HV1) connectors is loose.
6 The PH Unit cable is loose.
7 The following voltage is supplied from the Master
Board (PWB-A).
<Check procedure>
Check that there is 24 V developing across the
Master Board pin and GND when the Power Switch
is turned ON (during a copy cycle or a standby
state).
Di1611/Di2011 FIELD SERVICE Ver.1.0 Mar. 2004
<Typical Faulty Images>
Check
3-54
4011T036AA
Result Action
YES • Reinstall.
YES • Correct or change.
YES • Clean, correct, or
change.
YES • Clean, correct, or
change.
YES • Reconnect.
YES • Reconnect.
YES • Change IU.
• Change PH Unit.
• Change High Volt-
age Unit (HV1).
NO • Change Master
Board (copier: PWB-
A).