Epson AcuLaser C2900N Service Manual page 78

Chapter 1 Troubleshooting
Step
Checking the power to the MOTOR.
Disconnect J422 from the PWBA FEED H.
21 Are the voltages across J422-6pin <=> ground on the
PWBA FEED H, about +24 VDC when the interlock switch
(HARN ASSY INTERLOCK) is pushed?
Checking the connectors of the SOLENOID FEED for
connection.
22 Check the connections between the PWBA FEED H and
SOLENOID FEED.
Are P/J421 and P/J4211 connected correctly?
Checking the HARNESS ASSY TRAY COMP for continuity.
Disconnect J421 from the PWBA FEED H.
23
Disconnect P4211 from the SOLENOID FEED.
Is each cable of J421 <=> P4211 continuous?
Checking the power to the SOLENOID FEED MSI.
Disconnect J421 from the PWBA FEED H.
24 Is the voltage across P421-1pin <=> ground on the PWBA
FEED H, about +24 VDC when the Interlock Switch (HARN
ASSY INTERLOCK) is pushed?
Checking the SOLENOID FEED MSI for resistance.
Disconnect P/J4211 of the SOLENOID FEED MSI.
25
Is the resistance across J4211-1 and J4211-2 approximately
96 ohm?
Checking the connectors of the Feed Clutch (CLUTCH
ASSY DRV) for connection.
26 Check the connections between the PWBA FEDD H and
Feed Clutch.
Are P/J420 and P/J4201 connected correctly?
Checking the HARNESS ASSY TRAY COMP for continuity.
Disconnect J420 from the PWBA FEED H.
27
Disconnect P4201 from the Feed Clutch.
Is each cable of J420 <=> P4201 continuous?
Checking the power to the Feed Clutch.
Disconnect J420 from the PWBA FEED H.
28 Is the voltage across P420-1pin <=> ground on the PWBA
FEED H, about +24 VDC when the Interlock Switch (HARN
ASSY INTERLOCK) is pushed?
Checking the Feed Clutch for resistance.
Disconnect P/J4201 of the Feed Clutch.
29
Is the resistance across J4201-1 and J4201-2
approximately 280-ohm?
Epson AcuLaser C2900N
Check
1 - 65
Remedy
Yes
Replace the
Replace the
MOTOR ASSY
PWBA FEED H.
SUB.
Reconnect the
connector(s) P/
Go to step 23.
J421 and/or P/
J4211 correctly.
Replace the
Go to step 24. HARNESS ASSY
TRAY COMP.
Replace the
Go to step 25.
PWBA FEED H.
Replace the
Replace the
SOLENOID FEED
PWBA FEED H.
MSI.
Reconnect the
connector(s) P/
Go to step 27.
J420 and/or P/
J4201 correctly.
Replace the
Go to step 28. HARNESS ASSY
TRAY COMP.
Replace the
Go to step 29.
PWBA FEED H.
Replace the Feed
Replace the
Clutch (CLUTCH
PWBA FEED H.
ASSY DRV).
Revision B
No
Confidential