Blank Copy, Black Copy - Minolta CF910 Service Manual

(19) Blank Copy, Black Copy

Blank Copy
<Troubleshooting Procedure>
Step
1 Is the problem a "blank copy"?
2 From the "Test Print" menu, select "Gradation Pattern" and then "4 Color" and press
the Start key.
3 Is the output still blank?
4 Are the print jacks and connectors on and
around PWB-C, -JA, and -JD connected
properly?
5 Is the Rear Cover installed?
6 Is there any faulty symptom evident in the
area around the Developing Drive Motor?
7 From the "Test Print" menu, select "Gradation Pattern" and then "4 Color" and press
the Start key.
8 Is the output still solid black?
9 Are the print jacks and connectors on and
around PWB-C, -JA, and -JD connected
properly?
10 Is the Rear Cover installed?
11 Is there any void area in the sample image
output in step 2?
1144T028AA
Check Item
T-86
Black Copy
1144T029AA
Result
NO Go to step 7.
YES Change the board of IR (PWB-
C).
NO Reconnect the print jacks and
connectors.
NO Install the Rear Cover.
YES Change PWB-C, -JA, and -JD.
NO Repair the faulty parts.
NO Change the board of IR (PWB-
C).
NO Reconnect the print jacks and
connectors.
NO Install the Rear Cover.
YES Change PWB-C, -JA, and -JD.
NO Change the Polygon Motor
Drive Board, PWB-JA, and -JD,
and PH Upper and Lower Units
as a set. ("IR Area," "PRT
Area," and "Gradation Adjust")
Action