Minolta Di152 - Low Image Density

FrameMaker Ver.5.5E(PC) Di152/Di183 TROUBLESHOOTING
01.09.04
T-47
(3) Low image density
Section Step Check Result Action
Output
system
1 Image density changes after “Toner
Replenisher” has been run.
• “Toner Replenisher” of Utility
YES • Replenish the supply of
toner using “Toner
Replenisher.”
2 Image density changes after “ID Adjust-
ment” and “VG Adjustment” have been
made.
YES • Readjust.
For more details, see
SWITCHES ON PWBs/
TECH. REP. SET-
TINGS.
3 Image transfer current contact is dirty,
folded, or bent.
YES • Clean, correct, or
change.
4 Developing bias contact is dirty, folded,
or bent.
YES • Clean, correct, or
change.
5 High Voltage Unit (HV1) connectors
CN1HV1 and CN2HV1 are loose.
YES • Reconnect.
6 ATDC Sensor (UN1) is dirty with foreign
matter (such as paper dust) other than
developer.
YES • Clean.
7 The following voltages develop from the
ATDC Sensor (UN1).
<Check Procedure>
Check voltage across a Master Board
pin and GND when the Power Switch is
turned ON.
• DC5.39 V to 8.15 V across PJ7A-8
and GND
• DC1.41 V to 4.98 V across PJ7A-10
and GND
NO • Change ATDC Sensor
(UN1) and then change
developer.
8 The following voltage is supplied from
the Master Board (copier: PWB-A).
<Check Procedure>
Check voltage across a Master Board
pin and GND when the Start key is
pressed.
• Voltage across PJ8A-8 and GND
DC14 V in standby state
DC0 V when Start key is pressed
YES • Change IU.
• Change High Voltage
Unit (HV1).
NO • Change Master Board
(copier: PWB-A).