Minolta Di 152 Trouble Gradation reproduction

FrameMaker Ver.5.5E(PC) Di152/Di183 TROUBLESHOOTING

01.09.04

(11) Gradation reproduction failure

Section Step Check Result Action
Output

system

Input
system

1 PC Drum is dirty. YES • Clean.
2 Image Transfer Roller is dirty, scratchy,

deformed, worn, or damaged.

3 PH Unit connectors PJ12A and PJ13A are

loose.
4 PH window of PH Unit is dirty. YES • Clean.
5 ATDC Sensor (UN1) is dirty with foreign mat-

ter (such as paper dust) other than developer.
6 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

1 Original Glass is dirty, scratchy, worn, or

damaged.

2 Shading sheet reading portion (the portion on

the backside of the Original Glass to which
Original Width Scale is affixed) is dirty.

3 Scanner mirrors are dirty, scratchy, or dam-

aged.
4 Exposure Lamp (LA2) is dirty. YES • Clean or change.
5 CCD Unit lens and CCD surface are dirty or

scratchy.

<Check Procedure>

Remove lens cover to check for possible con-

tamination.
6 Exposure Lamp is abnormally lit (flickers or

abnormally dark) when the Start key is

pressed.
7 Inverter Board (copier: PU2) connector

CN1PU2 is loose.

8 CCD Board (copier: PWB-J) connector is

loose.
9 Control Board (copier: PWB-C) connector

PJ1A is loose.

YES • Clean or change.

YES • Reconnect.

YES • Clean.

NO • Change ATDC

Sensor (UN1) and
developer.

YES • Change Master

Board (copier:
PWB-A).

YES • Clean or change.

YES • Clean.

YES • Clean or change.

YES • Clean or change.

NO • Go to step 8.

YES • Reconnect.

NO • Change Exposure

Lamp (LA2).

YES • Reconnect.

YES • Reconnect.

NO • Change CCD Unit.

• Change Control
Board (copier:
PWB-C).

T-58