Service manual

QMS 3260/4032 Laser Printer - Base Engine Technical Manual 8-3
Release Version 11-97
Running Printer Diagnostics
Diagnostic Mode Routines and Subroutines
While in Dia
g
nostic Mode
y
ou have access to a variet
y
of test functions:
Input Test (H/L)
Check the si
g
nal level
(
on/off
)
comin
g
from a specific sensor.
Input Test (A/D)
Check the value of a si
g
nal comin
g
from a specific sensor.
IN n+1 Test
Check the operation of the control panel ke
y
s and as an alternate wa
y
to check sensor function.
Output Test
Switch on and off a specific component, such as a motor or solenoid.
Paper Feeder and CRU usage
Displa
y
the contents of component usa
g
e lo
g
s.
Test Print
Generate a built-in Test Pattern, and sent it to a specific output destination.
Before running printer diagnostics
Connect the printer Control Panel to the MCU PWB
(
Refer to
Section 7-Diagnostic Mode and the Control
Panel
on how to connect and use the Control Panel to run Dia
g
nostics
)
.
To enter Diagnostic Mode
1. Press and hold
[
1
]
and
[
3
]
while
y
ou switch on printer main power.
2. When the Control Panel LCD displa
y
s
Chn-00 Fun-00,
as shown below, release
[
1
]
and
[
3
]
.
The printer is now in Dia
g
nostic Mode.
SER875X
SER876X