Lexmark X500n Service Manual - Page 56

Transfer roller clutch service check, Questions / actions

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7100-XXX Transfer roller 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 transfer roller clutch? Go to step 2. Properly connect cable. If problem persists, go to step 2. Disconnect transfer roller clutch from cable. Measure resistance between two outer pins on transfer roller clutch. Does resistance measure between 119 and 145 ohms? Go to step 3. Replace faulty transfer roller clutch. See "Clutch removal" on page 4-27. 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 5 and 6 (cable) to connector that attaches to transfer roller 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 transfer roller clutch. See "Clutch removal" on page 4-27. Replace cable. If problem persists, replace faulty transfer roller clutch. See "Clutch removal" on page 4-27. Transfer belt cleaning roller 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 cleaning roller clutch? Disconnect transfer belt cleaning roller clutch from cable. Measure resistance between two outer pins on cleaning roller clutch. Does resistance measure between 198 and 242 ohms? Remove engine controller board shield. See "Engine controller board removal" on page 4-34 for steps to remove shield. Disconnect cable from MCN4 on engine controller board. Check cable continuity from MCN4 pins 1 and 2 (cable) to connector that attaches to cleaning roller 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 cleaning roller clutch. See "Cleaning roller clutch removal" on page 4-25. Properly connect cable. If problem persists, go to step 2. Replace faulty cleaning roller clutch. See "Cleaning roller clutch removal" on page 4-25. Replace cable. If problem persists, replace faulty cleaning roller clutch. See "Cleaning roller clutch removal" on page 4-25. 2-18 Service Manual

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2-18
Service Manual
7100-XXX
Transfer roller clutch service check
Transfer belt cleaning roller 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
transfer roller clutch?
Go to step 2.
Properly connect cable. If
problem persists, go to step
2.
2
Disconnect transfer roller clutch from cable.
Measure resistance between two outer pins
on transfer roller clutch. Does resistance
measure between 119 and 145 ohms?
Go to step 3.
Replace faulty transfer
roller 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 5
and 6 (cable) to connector that attaches to
transfer roller 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
transfer roller clutch. See
“Clutch removal” on
page 4-27
.
Replace cable. If problem
persists, replace faulty
transfer roller 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
cleaning roller clutch?
Go to step 2.
Properly connect cable. If
problem persists, go to step
2.
2
Disconnect transfer belt cleaning roller
clutch from cable. Measure resistance
between two outer pins on cleaning roller
clutch. Does resistance measure between
198 and 242 ohms?
Go to step 3.
Replace faulty cleaning
roller clutch. See
“Cleaning roller clutch
removal” on page 4-25
.
3
Remove engine controller board shield. See
“Engine controller board removal” on
page 4-34
for steps to remove shield.
Disconnect cable from MCN4 on engine
controller board. Check cable continuity
from MCN4 pins 1 and 2 (cable) to
connector that attaches to cleaning roller
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
cleaning roller clutch. See
“Cleaning roller clutch
removal” on page 4-25
.
Replace cable. If problem
persists, replace faulty
cleaning roller clutch. See
“Cleaning roller clutch
removal” on page 4-25
.