Service manual

QMS 3260/4032 Laser Printer - Base Engine Technical Manual 8-15
Release Version 11-97
Running Printer Diagnostics
Running an Input Test (A/D)
Use this Dia
g
nostic routine to check the analo
g
si
g
nal level
(
0 ~
n)
or di
g
ital si
g
nal level
(
a hexadecimal
number
)
comin
g
from a switch or sensor. This test tells
y
ou whether or not a switch or sensor is workin
g
correctl
y
and sendin
g
the correct volta
g
e si
g
nal level to the MCU PWB. Use the tables provided on the fol-
lowin
g
pa
g
es to interpret the displa
y
ed values.
1. Enter Dia
g
nostic Mode
The printer is in Dia
g
nostic Mode and the LCD displa
y
s Chn-00 Fun-00.
2. Select an Input Test
(
A/D
)
from the tables on the followin
g
pa
g
es.
3. Use the Control Panel ke
y
s to enter the Chain number of the test.
4. Press Function Ke
y
[
1
]
to switch the cursor from Chn and Fun.
5. Use the Control Panel ke
y
s to enter the Fun number of the test.
6. Press Function Ke
y
[
1
]
to start the Input test.
The LCD displa
y
s the
Chn
-
Fun
number of the test,
Input (A/D)
, and a hexadecimal number that corre-
sponds to the level send from the switch or sensor.
7. When
y
ou are finished with this test, switch off printer main power to exit Dia
g
nostic Mode.
Input Test (A/D) table for Paper Size Sensors
Chain
(Routine)
Function
(Subroutine)
Signal from the... Comments
71
Tray 1 Paper Size Sensor Hex number. See table
72
Tray 2 Paper Size Sensor Hex number. See table
73
Tray 3 (HCF3) Size Sensor Hex number. See table
74
Tray 4 (HCF4) Size Sensor Hex number. See table
75
Tray 5 (HCF5) Size Sensor Hex number. See table
76
MSI/Envelope Size Sensor Hex number. See table
723
HCF Detect Hex number. See table
10 20
Fuser Heat Roll Temperature Changing hex number. See table
SER879X