Service manual

6 QMS 3260/4032 Laser Printer - Base Engine Technical Manual

Release Version 11-97

Primary FIPS: Error Codes

3.3 Error Code U3-1

There is a problem with the ROS.

Logic Control on the MCU PWB received a constant HIGH signal from the Start of Scan (SOS) Sensor.

Step Actions and Questions Yes No

SUSPECT COMPONENTS

The following components are associated with this specific

problem. One or more of these components may have failed

partially or completely. If you cannot isolate the problem using

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

until the problem disappears.

•

wiring and connectors linking the components

RESET

1. Switch off printer main power.

2. Wait one minute.

3. Switch on printer main power.

Does the U3-1 error code appear?

Go to step 2 Suspect a

possible inter-

mittent prob-

lem with the

MCU PWB,

the Laser

Diode PWB,

the SOS Sen-

sor, or the

connectors

and wiring

linking these

components.

Replace the MCU PWB (RRP 9.7)

Does the U3-1 error code appear?

Replace the

ROS Assem-

bly (RRP 5.1)

Problem

solved