Service manual

QMS 3260/4032 Laser Printer - Base Engine Technical Manual 4-13

Release Version 11-97

Primary Fault Isolation Procedures

4.7 Inoperative Interlock Switch

The Control Panel LCD either does not display an

interlock open

Error Code whenever a specific door or

cover is open, or it does display an

interlock open

Error Code when a specific door or cover is closed.

Step Actions and Questions Yes No

SUSPECT COMPONENTS

The followin

components are associated with this specific

problem. One or more of these components ma

have failed

partiall

or completel

. If

ou cannot isolate the problem usin

this FIP, replace each component listed below, one at a time,

until the problem disappears.

• wiring and connectors linking the components

• Printer cover or door (refer to the Parts List)

INTERLOCK SWITCH TEST

1. Use Diagnostic Mode - Input n+1 13-1 to check the inter-

lock switch of the door or cover in question.

2. Manually actuate and deactuate the switch.

Does the Control Panel LCD display a number that

advances by one digit each time you actuate or deactuate

the interlock switch?

Replace the

MCU PWB

(RRP 9.7)

Replace the

Left Lower

Cover Inter-

lock Switch

(RRP 3.15) or

the Left Cover

Interlock

Switch (RRP

9.6)