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4-6 Phaser 4500 Service Manual

Check Harness A, 24 V Input:

1. Turn the power OFF.

2. Disconnect J404B and J403.

3. Check each conductor in the harness for

continuity.

Is each conductor continuous?

Go to step 4. Replace

Harness A from

the LVPS

(page 8-78).

Check Harness B, 3.3 V Input:

1. Turn the power OFF.

2. Disconnect P/J40 on the LVPS and

P/J401 on the DC-DC Converter.

3. Check for continuity across the following:

■ P/J40-3 <=> P/J401-2

■ P/J40-4 <=> P/J402-1

Are both conductors continuous?

Go to step 8 Replace

Harness B.

Check Harness C, output to Image

Processor Board:

1. Turn the power OFF.

2. Disconnect P/J402 on the DC-DC

Converter and P/J130 on the I/P Board.

3. Check for continuity between P/J402

and P/J130

Are all conductors continuous

Replace the

DC-DC Converter

(page 8-80).

Replace

Harness C.

Troubleshooting Procedure (Continued)

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Xerox Phaser 4500 Service Manual

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