Super Serial Card: Blown Resistor



PROBLEM DESCRIPTION: ImageWriter causes R7 on the Super Serial Card to
fail.

BEFORE YOU START: Familiarize yourself with the procedure for removal and
replacement of the carrier drive transistors, referring to the ImageWriter
Level I Technical Procedures.

CAUSE: One of the carriage transistors in the ImageWriter is shorted.

CURE: Follow these steps:

1. Remove the string of 4 carrier drive transistors and their associated
insulators using the procedure documented in the ImageWriter Technical
Procedures.

2. Check to make sure that none of the insulators is missing or cracked.

3. If any of the insulators is missing or cracked, replace them, reinstall the
string of carriage transistors, and test the printer with the Super Serial Card
Otherwise, proceed to Step 4.

4. Replace the string of carriage transistors with a new set and test the
printer using the Super Serial Card.

5. If the above procedure does not cure the problem, refer to
Troubleshooting in the ImageWriter Technical Procedures.


Published Date: Feb 18, 2012