High I.d - Minolta CF910 Service Manual

(17) High I.D.

<Troubleshooting Procedure>
Step
1 Open the "IR Area" screen from the
"Machine Adjust" menu of the Service
mode. Is each adjusting item okay?
2 Do the data for "VB Shift," "Background
Voltage," "ATDC Level Setting," and "AE
Adjust" available from the "Image Adjust"
mode menu of the
Service mode represent the standards?
3 Run "Gradation Adjust" three times.
4 Does the "high I.D." problem persist when
another copy is made from the same origi-
nal?
5 Is the I.D. high of the image output during
"Gradation Adjust"?
6 Is I.D. high for all colors?
7 Is the AIDC Sensor window dirty with
developer?
8 A. Clean the AIDC Sensor window.
B. Turn the Power Switch OFF and ON.
C. Run "Gradation Adjust" three times.
9 Make a copy from the standard chart and
check the output image. Is I.D. still high?
Check Item
T-82
1144T026AA
Result
NO Readjust the items of "IR Area."
NO A. Change the data to the
standard values.
Note:
If the data for "ATDC Level
Setting" are changed, make
about 20 copies from the
standard chart and turn
OFF and ON the Power
Switch.
B. Run "Gradation Adjust"
three times.
NO This completes the procedure.
NO Change the board of IR (PWB-
C).
NO Go to step 10.
YES Change the Developing Unit.
("Developer" and "Gradation
Adjust")
YES Change the Developing Unit.
("Developer" and "Gradation
Adjust")
NO This completes the procedure.
Action