Diagnostic information 2-81
5061
Close door/HVPS/printhead interlock switch service check
Note: There are two separate cables that contain microswitches and a cable. These cable/switches provide
separate interlocks for the printhead and HVPS. One switch in the Printhead/cover open cable is mounted in the
front access door support, and the other switch in the printhead/open cover cable is mounted on the ITU light
shield assembly. The HVPS/cover open cable only has one switch mounted on the front access door support
and is routed through the ITU autoconnect. The HVPS/cover open cable is connected to J14 on the system
board, and the printhead/cover open cable is connected to JCVR1 on the system board.
POR incomplete, Close Door constantly displays
This symptom is usually associated with the lower switch mounted on the front access door support and with the
switch mounted in the ITU light shield.
Step Actions and questions Yes No
1 Make sure that the ITU light shield is not out of
position.
Is the ITU light shield out of position?
Properly align the
ITU light shield.
Go to step 2
2
Make sure the ITU assembly interlock switch actuator
is not damaged or broken and actuates the switches
correctly.
Is the actuator damaged or broken?
Replace the ITU
assembly. See
“ITU assembly
removal” on
page 4-49.
Go to step 3
3
Front cover assembly
Does the front cover assembly close correctly?
Go to step 4 Install the front
cover correctly,
or repair as
necessary
4
Front cover assembly
Make sure the front cover flag is not broken or
damaged and actuates the switches correctly.
Is the flag broken or damaged?
Replace the front
cover. See
“Front cover or
front cover
backplate
assembly
removal” on
page 4-11.
Go to step 5
5
Printhead/cover open interlock cable assembly and
+24 V cover switch.
Make sure that the cable is correctly connected to
JCVR1 and J14 on the system board.
Are the cables connected correctly?
Go to step 6 Install the cable
correctly.
6
Make sure the front cover assembly is closed and the
ITU is correctly installed. Disconnect JCVR1 from the
system board, and check for continuity between pins
JCVR1-1 and JCVR1-3.
Do you measure continuity?
Go to step 7 Replace the
printhead
interlock cable/
switch assembly
(see “Printhead
interlock cable
assembly” on
page 7-37 for the
part number.)
7
Disconnect J14 from the system board and check for
continuity between pins J14-1 and J14-2.
Do you measure continuity?
Replace the
system board.
See “System
board removal”
on page 4-90.
Replace the ITU
light shield
assembly. See
“ITU light shield
assembly” on
page 7-37.
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