Epson AcuLaser C2900N Service Manual page 111

Chapter 1 Troubleshooting
Step
Checking the connectors of the CLUTCH ASSY DRV (Regi
Clutch) for connection.
Check the connections between the PWBA MCU and
CLUTCH ASSY DRV (Regi Clutch).
Are P/J26 and P/J262 connected correctly?
20
Checking the HARN ASSY KSNR REGCL for continuity.
Disconnect J26 from the PWBA MCU.
21
Disconnect P262 from the CLUTCH ASSY DRV.
Is each cable of J26 <=> P262 continuous?
Checking the power to the CLUTCH ASSY DRV.
Disconnect J26 from the PWBA MCU.
22 Is the voltage across P26-4pin <=> ground on the PWBA
MCU, about +24 VDC when the Interlock Switch (HARN
ASSY INTERLOCK) is pushed?
Checking the CLUTCH ASSY DRV for resistance.
Disconnect P/J262 of the CLUTCH ASSY DRV.
23
Is the resistance across J262-1 and J262-2 approximately
280-ohm?
Checking the connectors for connection.
Check the connections between the PWBA MCU and
DRIVE ASSY MAIN (Main Motor).
Are P/J21 and P/J211 connected correctly?
24
Checking the HARNESS ASSY MAIN MOT MG SFP for
continuity.
25 Disconnect J21 from the PWBA MCU.
Disconnect J211 from the DRIVE ASSY MAIN.
Is each cable of J21 <=> J211 continuous?
Checking the power to the DRIVE ASSY MAIN.
Disconnect J21 from the PWBA MCU.
26 Are the voltages across J21-2pin/J21-4pin <=> ground on
the PWBA MCU, about +24 VDC when the interlock switch
(HARN ASSY INTERLOCK) is pushed?
Epson AcuLaser C2900N
Check
1 - 98
Remedy
Yes
Reconnect the
connector(s) P/
Go to step 21.
J26 and/or P/J262
correctly.
Replace the
Go to step 22. HARN ASSY
KSNR REGCL.
Replace the
Go to step 23. PWBA MCU.
(Refer to RRP8.9.)
Replace the
Replace the
CLUTCH ASSY
PWBA MCU.
DRV. (Refer to
(Refer to RRP8.9.)
RRP3.1.)
Reconnect the
connector(s) P/
Go to step 25.
J21 and/or P/J211
correctly.
Replace the
HARNESS ASSY
Go to step 26.
MAIN MOT MG
SFP.
Replace the
Replace the
DRIVE ASSY
PWBA MCU.
MAIN. (Refer to
(Refer to RRP8.9.)
RRP7.2.)
Revision B
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