Samsung CLX-9201 Service Manual page 413

c) If the modular connector is not installed properly, open the rear cover and re-install.
5) CURM Joint PBA problem
-
If CRUM Joint PBA has some problems of the modular jack pin or the main board interface connector etc,
replace the PBA with new one like No.4.
6) Bad connection between the main board and the CRUM Joint PBA
- Check the connection between the main board and the CRUM Joint PBA.
If the connection is bad, replace the harness or the CRUM Joint PBA or main board.
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4. Troubleshooting
4-230