2-34 Service Manual
5025-2xx, 4xx
Input sensor (S2) service check
The Input sensor (S2) is part of the ACM FRU.
Step Questions / actions Yes No
1 Enter Diagnostics Menu (turn the printer off,
press and hold and , turn the printer on,
and then release the buttons when the
installed memory and processor speed
displays).
Perform the Base Sensor Test. See “Base
Sensor Test” on page 3-16.
1. Select Base Sensor Test, and press
Select ().
2. Select S2, and press Select ().
3. Pull tray 1 out, and rotate the S2 sensor
flag (S2 is located in front of the center
autocompensator mechanism housing.) It
should rotate freely and return to its original
position.
Is the input (S2) sensor flag damaged?
Replace the
autocompensator
mechanism. See
“Autocompensator
mechanism (ACM)
removal—standard tray”
on page 4-15.
Go to step 2.
2
Watch the display while rotating the flag.
Does the display indicate Media Clear and
Media Present?
Problem resolved. Go to step 3.
3
Turn the printer off, and remove the rear
shield. See “Rear shield removal” on
page 4-11.
Is the JSP1 cable connector properly
connected to the controller board?
Go to step 4. Reseat the connector.
4
Turn the printer on, and check the voltage at
JSP1 pin 15.
Is the voltage approximately +5 V dc?
Replace the
autocompensator
mechanism. See
“Autocompensator
mechanism (ACM)
removal—standard tray”
on page 4-15.
Replace the controller
board. See “Controller
board removal” on
page 4-19.
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