Specifications

6.1 Bad Power or Control Panel FIPs

Explanation: A power or control panel malfunction can cause a failure of the

normal power up activities. Because the control panel is inoperative, there are

no error messages.

When the printer is working properly, you can see and hear the following

events after the power is turned on:

Sounds Air wooshing from the exhaust fan, high-pitched whine from the scanner

motor, low-pitched rumble from the main motor and gear train.

Control

panel

Various indicators light as the self test runs, the "Warming Up" message

appears for approximately 200 seconds, and the "READY/IDLE" message

appears at the end of the power-up process.

Action The main motor turns (rounding) the paper path rollers for approximately

six seconds. If the covers are removed, you can see the fuser heater

glowing.

Review the following two sets of symptoms and choose the one that describes

the malfunction:

Symptom 1: The following symptoms indicate a working print engine with a

malfunctioning control panel circuit:

• At power up, the rounding cycle completes

• The fusing unit gets warm

• The engine board test pattern prints.

• The control panel message is blank, hung, unreliable, or ambiguous.

Action: Do the following to ﬁx a control panel problem:

1. Make sure that the control panel cable connector is properly plugged into

the J131 connector on the video controller board. See Section 9.2 for the

connector’s location and Section 2.1.1 for a block diagram.

2. Swap the following FRUs:

• Video controller board

• Control panel

• DC control board

6–2 Power and Control Panel FIPs