Xerox DocuPrint C55 Service Manual page 50

OF4 TRAY 2 PAPER SIZE SENSING
RAP
This RAP is used to troubleshoot the paper
size sensing for Tray 2. Use this RAP when
the paper size that is loaded is not the same
size that is being sensed.
INITIAL ACTION
Remove Tray 2 and check the movable length
stop. Make sure the tab which actuates the
sensors is not broken.
Carefully load the paper size which is not
being detected correctly.
Switch the power off wait 10 seconds and
switch the power on. Make a print of the paper
size which is loaded to recheck for the fault.
PROCEDURE
Enter IOT normal diagnostics. Scroll to the
SWITCH SCAN program and select Scan Row
03. Press Form Feed [1].
Remove Cassette 2. Remove the Length Stop
and re-insert Cassette 2 without the stop.
Observe the LEDs.
Cyan, Magenta, and Yellow are all On.
Y N
Refer to BSD T2 7.2 and check the
following:
• Cyan is Off. Check the T2 Paper Size
0 signal, CN109-1 for a short to
ground.
• Magenta is Off. Check the T2 Paper
Size 1 signal, CN109-2 for a short to
ground.
• Yellow is Off.
Check the T2 Paper
Size 2 signal, CN109-3 for a short to
ground.
A B
OTHER FAULTS RAPs
OF4
A B
If OK, replace the T2 Cassette PWB. If
problem still exists, replace the PCU PWB.
With Scan Row 03 still selected remove the
cassette and put the Length Stop in the
Executive (10.5") position (Figure 2-4).
Insert the cassette and observe the LEDs.
Cyan is On, Magenta is Off, and Yellow is
ON.
Y N
Refer to BSD T2 7.2 and check the T2
Paper Size 1 signal, CN109-2 for an open.
If OK, replace the T2 Cassette PWB. If
problem still exists, replace the PCU PWB.
Remove the cassette and put the Length Stop
in the Letter (11") position.
Insert the cassette and observe the LEDs.
Cyan is On, Magenta is Off, and Yellow is
On.
Y N
Refer to BSD T2 7.2 and check the T2
Paper Size 1 signal, CN109-2 for an open.
If OK, replace the T2 Cassette PWB. If
problem still exists, replace the PCU PWB.
Remove the cassette and put the Length Stop
in the (A4) position.
Insert the cassette and observe the LEDs.
C
2/99
2-36
C
Cyan is On, Magenta is On, and Yellow is
Off.
Y N
Refer to BSD T2 7.2 and check the T2
Paper Size 2 signal, CN109-3 for an open.
If OK, replace the T2 Cassette PWB. If
problem still exists, replace the PCU PWB.
Remove the cassette and put the Length Stop
in the Legal (14") position.
Insert the cassette and observe the LEDs.
Cyan is Off, Magenta is On, and Yellow is
Off.
Y N
Replace the T2 Cassette PWB.
Replace the PCU PWB.
10.5" 11", A4
Figure 2-4. Length Stop Location
DocuPrint C55/C55mp/[NC60]
14"