09/03
2-320
DC 3535/2240/1632, WC M24
15-389
Initial issue
Status Indicator RAPs
15-389 CCD AOC4
Automatic Offset Control (AOC) for CCD Channel 4 failed.
Initial Actions
• Verify that the Platen Glass is installed correctly (REP 6.2).
• Verify that NVM location 715-400 = 1
Procedure
Enter dC330 [6-002] and press Start. The Exposure Lamp illuminates.
YN
Go to the 6-371 RAP.
The Exposure Lamp illumination is bright and steady.
YN
Go to Figure 1 and check P/J724 for an open or short circuit.
Verify that P/J742 on the Lamp Ballast PWB and P/J724 on the IIT/IPS PWB are seated.
If the wires and connectors are good, replace the Exposure Lamp (PL 18.6).
If the problem continues, replace the Lamp Ballast PWB (PL 18.6).
If the problem continues, replace the IIT/IPS PWB (PL 18.3).
Remove the Platen Glass (REP 6.2). The white reference strip on frame under the Regis-
tration Gate is clean and undamaged.
YN
Clean the white reference strip.
Go to Figure 2 and check the flat cables on the IIT/IPS PWB ( P/J721) and the CCD PWB ( P/
J741) for damage. Reseat the flat cable.
If the problem continues, replace the Lens Kit (PL 18.4).
If the problem continues, replace the IIT/IPS PWB (PL 18.3).
Figure 1 15-389 RAP Circuit Diagram - Lamp Ballast
Figure 2 15-389 RAP Circuit Diagram - CCD
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