Service manual

QMS 3260/4032 Laser Printer - Base Engine Technical Manual 8-9
Release Version 11-97
Running Printer Diagnostics
Running an Input Test (H/L)
Use this Dia
g
nostic routine to check the di
g
ital si
g
nal level
(
Hi
g
h or Low
)
from a sensor or switch. This test
tells
y
ou whether or not a sensor or switch is workin
g
correctl
y
and is sendin
g
a si
g
nal to the MCU PWB.
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
(
H/L
)
from the table on the next pa
g
e.
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 (H/L)
, and
H or L
to indicate the status of the
sensor or switch at that moment.
7. Watch the status field as
y
ou manuall
y
actuate the sensor or switch.
The status field should chan
g
e from either H to L or L to H as
y
ou manuall
y
actuate and deactuate the
sensor or switch.
8. When
y
ou are finished with this test, switch off printer main power to exit Dia
g
nostic Mode.
To change to another Input Test
1. Press
[
0
]
to stop the current Input test.
2. Press
[
0
]
to move the cursor to Chn.
3. Select a new Input Test from the table on the next pa
g
e.
4. Use the Control Panel ke
y
s to enter the Chain number of the new test.
5. Press Function Ke
y
[
1
]
to switch the cursor from Chn and Fun.
6. Use the Control Panel ke
y
s to enter the Fun number of the new test.
7. Press Function Ke
y
[
1
]
to start the new Input test.
The LCD displa
y
s the
Chn
-
Fun
number of the new test,
Input (H/L)
, and
H or L
to indicate the status
of the sensor or switch at that moment.
8. Watch the status field as
y
ou manuall
y
actuate the sensor or switch.
SER878X