Specifications

Chapter 6: FRU Replacement and Fault Isolation Procedures

6-37

6.2.18 Erratic operation

NOTES:

DO NOT USE THIS FIP if the Diagnostic tool is not available

1. INITIAL ANALYSIS

Inspect the

MCU PWB

. Is it compatible with your printer version, correctly installed, not

damaged, deformed, or contaminated?

Inspect the printer paper path. Is it clear of foreign matter, such as staples, paper clips, and

paper scraps?

Yes No

Go to Step 2. Replace the problem components.

Does the printer enter a print cycle?

Yes No

Go to Step 3 Go to Step 4

Enter Printing Test Mode.

Can the printer generate a test print?

Yes No

Go to Step 5. Replace the MCU PWB.

Does the printer RESET while it is making a test print?

Yes No

Go to Section 6.3.21

Noise

. Go to Step 5.

5. Install a new MCU PWB.

Does erratic operation still occur?

Yes No

Replace the ESS Assembly. Problem Solved.