Xerox WorkCentre 7545

This RAP is used to eliminate cyclical matte lines or black lines that appear in the process direction. The pitch changes depending on the process speed

Initial Actions

1. Check customer print to verify cyclical matte lines or black lines appear in the process direction as in Figure.
2. Use the LED Print Head (LPH) Cleaner to clean the LPH surface (PL 2.1).
   NOTE: This must be separated from Developer trimmer jam. Do not replace the LPH without consideration.
3. Perform IQ40 Process Direction Bands, Streaks, and Smears RAP. If this does not resolve the problem, continue with this RAP.
4. Print test pattern -12 (dC612).
5. Print test pattern -13 (dC612).

NOTE: The scale is 5.4mm pitch in print test pattern -12 and 2.7mm pitch in print test pattern - 13. These are used as the identification guideline.

Step	Procedure	Yes	No
1	The problem occurs at dC612 (Test Pattern Print)-15.	10	2
2	Check power to LPH from MD PWB. There is +5v at P/J532.	9	3
3	Check power to MD PWB from MCU PWB. There is +5v at P/J452.	8	4
4	Check power to MCU PWB from +5VDC LVPS. There is +5v at P/J401.	7	5
5	Check power from +5VDC LVPS. There is +5v at P/J510	6	Go to +5VDC Power RAP.
6	Check wire harness between the LVPS and MCU PWB for damage. Repair or replace as required (REP 9.11).
7	Check the F6 2A fuse located on the MCU PWB (PL 18.2A , PL 18.2B ). If check is ok, replace the MCU PWB (REP 1.4). If check reveals blown F6 2A fuse, replace the fuse.
8	Replace the MD PWB (REP 1.5).
9	Replace the LPH (REP 9.10).
10	Go to IQ45.