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09/03

3-26

DC 3535/2240/1632, WC M24

IQ23

Initial issue

Image Quality

IQ23 BCR Checkout RAP

Use this procedure to troubleshoot edge-to-edge, very dense, single-color background

Procedure

Swap the Drum Cartridge that creates the high single-color background with any of the other

Drum Cartridges and make a test print. The background color remains the same.

Replace the Drum Cartridge causing the single-color background (see Machine Consum-

ables in Section 6) (PL 4.1).

Go to Flag 3. Check the wires associated with the problem color for an open circuit. The

wires check out OK.

Repair or replace harness as required (PL 9.3).

Check for a loose connection at BCR HVPS PWB, P/J581 (Figure 1). The connection is

good.

Reconnect, repair or replace as required.

NOTE: The actual BCR bias voltage involves a high-frequency AC signal at a negative DC off-

set. The AC and DC values vary constantly, depending on run mode, Drum age, and several

environmental variables. Measured voltages will vary from machine to machine and job to job.

Program a Full Color copy job. While the job is running, check the pin on P/J581 that is asso-

ciated with the problem color for -400 VDC to -900 VDC:

K: pin 1

C: pin 4

M: pin 6

Y: pin 8

The voltages check out OK.

Replace the BCR HVPS PWB (PL 9.1).

Inspect the contact (Figure 1) at the Drum Cartridge associated with the problem. The con-

tact checks out OK.

Repair or replace as required (PL 9.3).

• Check the Wire Harness (PL 9.3, item 2) between the BCR HVPS PWB and the Drum

Cartridge for an open circuit. Repair or replace as required.

• Replace the affected Drum Cartridge (see Machine Consumables in Section 6) (PL 4.1).

• Replace the BCR HVPS PWB (PL 9.1).

Xerox DocuColor 2240 Service Manual

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