Lexmark X502N - Paper Feed Clutch Service Check; Registration Clutch Service Check

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.