Lexmark X500n Service Manual - Page 57

Paper feed clutch service check, Registration clutch service check

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7100-XXX Paper feed clutch service check Step 1 2 3 Questions / actions Yes No Turn printer off, and remove printer right cover. See "Right cover removal" on page 4-13. Is cable properly connected to paper feed clutch? Disconnect paper feed clutch from cable. Measure resistance between two outer pins on paper feed clutch. Does resistance measure between 119 and 145 ohms? Remove engine controller board shield. See "Engine controller board removal" on page 4-34 for steps to remove engine controller board shield. Disconnect cable from MCN4 on engine controller board. Check cable continuity from MCN4 pins 9 and 10 (cable) to outer pins on connector that attaches to paper feed clutch. Ensure that pins are not shorted. Is cable okay? Go to step 2. Go to step 3. Replace engine controller board. See "Engine controller board removal" on page 4-34. If problem persists, replace faulty paper feed clutch. See "Clutch removal" on page 4-27. Properly connect cable. If problem persists, go to step 2. Replace faulty paper feed clutch. See "Clutch removal" on page 4-27. Replace cable. If problem persists, replace faulty paper feed clutch. See "Clutch removal" on page 4-27. Registration clutch service check Step 1 2 3 Questions / actions Yes No Turn printer off, and remove printer right cover. See "Right cover removal" on page 4-13. Is cable properly connected to registration clutch? Disconnect registration clutch from cable. Measure resistance between two outer pins on paper feed clutch. Does resistance measure between (****check these values) 119 and 145 ohms? Remove engine controller board shield. See "Engine controller board removal" on page 4-34 for steps to remove engine controller board shield. Disconnect cable from MCN4 on engine controller board. Check cable continuity from MCN4 pins 7 and 8 (cable) to outer pins on connector that attaches to registration clutch. Ensure that pins are not shorted. Is cable okay? Go to step 2. Go to step 3. Replace engine controller board. See "Engine controller board removal" on page 4-34. If problem persists, replace faulty registration clutch. See "Clutch removal" on page 4-27. Properly connect cable. If problem persists, go to step 2. Replace registration clutch. See "Clutch removal" on page 4-27. Replace cable. If problem persists, replace faulty registration clutch. See "Clutch removal" on page 4-27. Diagnostic information 2-19

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Diagnostic information
2-19
7100-XXX
Paper feed clutch service check
Registration clutch service check
Step
Questions / actions
Yes
No
1
Turn printer off, and remove printer right
cover. See
“Right cover removal” on
page 4-13
. Is cable properly connected to
paper feed clutch?
Go to step 2.
Properly connect cable. If
problem persists, go to step
2.
2
Disconnect paper feed clutch from cable.
Measure resistance between two outer pins
on paper feed clutch. Does resistance
measure between 119 and 145 ohms?
Go to step 3.
Replace faulty paper feed
clutch. See
“Clutch
removal” on page 4-27
.
3
Remove engine controller board shield. See
“Engine controller board removal” on
page 4-34
for steps to remove engine
controller board shield. Disconnect cable
from MCN4 on engine controller board.
Check cable continuity from MCN4 pins 9
and 10 (cable) to outer pins on connector
that attaches to paper feed clutch. Ensure
that pins are not shorted. Is cable okay?
Replace engine controller
board. See
“Engine
controller board removal”
on page 4-34
. If problem
persists, replace faulty
paper feed clutch. See
“Clutch removal” on
page 4-27
.
Replace cable. If problem
persists, replace faulty
paper feed clutch. See
“Clutch removal” on
page 4-27
.
Step
Questions / actions
Yes
No
1
Turn printer off, and remove printer right
cover. See
“Right cover removal” on
page 4-13
. Is cable properly connected to
registration clutch?
Go to step 2.
Properly connect cable. If
problem persists, go to step
2.
2
Disconnect registration clutch from cable.
Measure resistance between two outer pins
on paper feed clutch. Does resistance
measure between (****check these values)
119 and 145 ohms?
Go to step 3.
Replace registration clutch.
See
“Clutch removal” on
page 4-27
.
3
Remove engine controller board shield. See
“Engine controller board removal” on
page 4-34
for steps to remove engine
controller board shield. Disconnect cable
from MCN4 on engine controller board.
Check cable continuity from MCN4 pins 7
and 8 (cable) to outer pins on connector that
attaches to registration clutch. Ensure that
pins are not shorted. Is cable okay?
Replace engine controller
board. See
“Engine
controller board removal”
on page 4-34
. If problem
persists, replace faulty
registration clutch. See
“Clutch removal” on
page 4-27
.
Replace cable. If problem
persists, replace faulty
registration clutch. See
“Clutch removal” on
page 4-27
.