Iq7 Light Image Rap - Xerox WorkCentre 4150 Service Manual

IQ7 Light Image RAP

Use this RAP when the machine produces light images in all modes, as shown in Figure 1.
Figure 1 Light image
Procedure
WARNING
Switch off the electricity to the machine. Disconnect the power cord from the customer
supply while performing tasks that do not need electricity. Electricity can cause death or
injury. Moving parts can cause injury.
NOTE: For solid print area specifications, refer to IQS 1 Solid Area Density.
Perform the following:
1. If the fault appears only in copy mode when using the DADF, check that the scanner lock,
PL 14.10 Item 20 is completely unlocked.
2. Ensure that the paper tray settings match the paper or media size in the trays.
3. Examine the toner module, PL 9.10 Item 2 and xerographic module, PL 9.10 Item 1.
Ensure they are free from all packing or sealing material.
4. Perform the Shading Test procedure, GP 15. If the shading test fails, install new compo-
nents as necessary:
• CCD module, PL 14.10 Item 2.
• CCD ribbon cable, PL 14.10 Item 7.
• Scanner assembly, PL 14.10 Item 1.
• Main PWB, PL 1.10 Item 1.
5. Remove the LSU, REP 6.1. Clean the LSU window using a clean, lint-free cloth. If neces-
sary, install a new LSU, PL 6.10 Item 1.
6. Refer to Wiring Diagram 2. Perform the following:
• Check the wiring between CON1 on the HVPS and the terminal assembly, PL 4.15
Item 13.
WorkCentre 4150
• If necessary, install a new HVPS, PL 1.10 Item 2.
7. Refer to Wiring Diagram 1 and Wiring Diagram 2. Perform the following:
• Check the spring contacts in the terminal assembly, PL 4.15 Item 13. The spring
contacts supply the voltages to the xerographic module and the side cover assem-
bly. If necessary, clean the spring contacts. If necessary, install a new terminal
assembly, PL 4.15 Item 13.
• Check the wiring between the HVPS and the terminal assembly, PL 4.15 Item 13.
• Check the wiring between CN1 on the HVPS and CN7 on the Main PWB.
• Install a new toner module, PL 9.10 Item 2.
• Install a new HVPS, PL 1.10 Item 2.
• Install a new side cover assembly, PL 7.30 Item 1.
8. Check the spring contacts to the transfer roll assembly, PL 7.35 Item 18. If necessary,
clean the spring contacts. Install new components as necessary, PL 7.35.
9. Refer to Wiring Diagram 7. Check the wiring between the ambient temperature sensor
and CN26 on the Main PWB. Light copies can be caused by a faulty ambient temperature
sensor. If necessary, install a new ambient temperature sensor, PL 1.10 Item 21.
September 2006
3-11
Image Quality
IQ7