1.17 ABNORMAL CONDITION IN TONER DENSITY
DETECTION
- Problem -
The Auto ID indicator or the selected manual ID level blinks. (No SC Code is
indicated.)
- Definition -
The detected TD sensor output goes below 0.2 volts.
- Possible Causes -
•
Defective TD sensor
•
Defective main control board
•
Loose connector
•
Poor connection between the imaging unit and the main copier
- Action -
Check the continuity between the TD sensor harness and CN124 on the
main control board. Are they properly connected?
Yes No
Connect the connector firmly.
Is the TD sensor circuit open?
No Yes
Replace the TD sensor and developer.
Check the electrical continuity of the harness from the main control board to
the TD sensor. Are they connected properly?
Yes No
Replace the harness.
Check the toner supply mechanisms. Are they working properly?
Yes No
Trouble-
shooting
20 December 1996 COPY QUALITY
7-21
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