Epson AcuLaser C2900N Service Manual page 128

Chapter 1 Troubleshooting
FIP-1.59 093-925 / 093-950 / 093-951 / 093-952: IOT (YMCK) Toner CRUM Comm Error
Step
Possible causative parts:
TONER CARTRIDGE (Y) (PL5.1.24)
TONER CARTRIDGE (M) (PL5.1.23)
TONER CARTRIDGE (C) (PL5.1.22)
TONER CARTRIDGE (K) (PL5.1.21)
CONNECTOR CRUM (PL5.1.14)
PWBA MCU (PL8.2.13)
HARN ASSY TONER CRUM (PL5.1.26)
Checking the TONER CARTRIDGE (Y, M, C or K) for
installing.
1 Reseat the TONER CARTRIDGE (Y, M, C or K).
Does the error still occur when the power is turned off and
on?
Checking the connectors for connection.
Check the connections between the PWBA MCU and
2 CONNECTOR CRUM (Y, M, C or K).
Are P/J31 and P/J311(Y) / P/J312 (M) / P/J313(C) / P/J314
(K) connected surely?
Does the error still occur when the power is turned off and
3
on?
Checking the HARN ASSY TONER CRUM for continuity.
Disconnect P/J31 from the PWBA MCU.
Disconnect P/J311(Y) / P/J312 (M) / P/J313(C) / P/J314 (K)
4
from the CONNECTOR CRUM (YMCK).
Is each cable of P/J31 <=> P/J311(Y) / P/J312 (M) / P/
J313(C) / P/J314 (K) continuous?
Checking the output power of CONNECTOR CRUM (Y, M,
C or K).
5 Disconnect P/J31 on the PWBA MCU.
Is the voltage across ground <=> J31-3(Y)/7(M)/11(C)/
15(K) pin on the PWBA MCU, about +3.3VDC?
Checking after the TONER CARTRIDGE (Y, M, C or K).
Replace the TONER CARTRIDGE (Y, M, C or K).
6
Does the error still occur when the power is turned off and
on?
Epson AcuLaser C2900N
Check
1 - 115
Remedy
Yes
Go to step 2. End of work.
Reconnect the
connector(s)
Go to step 4.
surely, then go to
step 3.
Go to step 4. End of work.
Replace the
Go to step 5. HARN ASSY
TONER CRUM.
Replace the
DISPENSER
Go to step 6.
ASSY. (Refer to
RRP5.1.)
Replace the
PWBA MCU. End of work.
(Refer to RRP8.9.)
Revision B
No
Confidential