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Duplex/manual feed sensor (S1) service check
Note: Before performing this service check, ensure that the printer is on a hard level surface.
Step
Questions / actions
1
Enter Diagnostics Menu (turn the printer off,
press and hold
and then release the buttons when the
installed memory and processor speed
displays).
Perform the Base Sensor Test. See
Sensor Test" on page
1. Select Base Sensor Test, and press
Select (
2. Select S1, and press Select (
3. Install tray 1.
Does the display indicate InputS1—Media
Clear...?
2
Pull tray 1 out.
Does the display indicate InputS1—Media
Present...?
3
Remove the tray, and inspect sensor.
Is there something obstructing the sensor?
4
Inspect the spring-loaded shaft/flag in the tray.
The flag portion of the shaft intercepts the
sensor, except when a sheet is being staged
for duplexing.
Does the shaft rotate freely and return to home
position (flag at top of rotation)?
5
Is the flag on the shaft broken?
6
Is the cable correctly connected to JFUSES1
on the controller board and to the sensor.
Is the sensor cable properly connected?
Turn the printer off, and remove the rear
7
shield. See
"Rear shield removal" on
page
4-7. Turn the printer on, and check the
values at JFUSES1:
Are the values approximately correct?
2-36
Service Manual
and
, turn the printer on,
"Base
3-18.
).
).
JFUSES1
Pin
Value
8
Ground
9
+3.3 V dc
Yes
Go to step 2.
The sensor is functioning
correctly.
Remove the obstruction and
restart the test.
Go to step 5.
Replace the tray.
Go to step 7.
Replace the duplex sensor.
See
"Duplex sensor
removal" on page
4-23.
No
Go to step 4.
Go to step 3.
Go to step 4.
Replace the tray with a new
one.
Go to step 6.
Reconnect the cable.
If the problem persists, go to
step 7.
Replace the controller
board. See
"Controller
board removal" on
page
4-18.
Y112730-2
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