Service Error Codes - NEC Super Script 4400 Maintenance Manual

S E
ERVICE RROR
This section describes the troubleshooting procedures for Service Call Error Codes.
Code Description of Error
C3 NVRAM Error
C4 Hard Error of MCTL
Control Circuit.
C7 Process Timing Error.
D1 Developer Clutch (DCLY)
D2
Developer Clutch (DCLM)
238 SuperScript 4400 — Maintenance Guide
C
ODES
Cause of Error
1. Failure of MCTL P.W.B.
CPU EEPROM
1. Failure of MCTL P.W.B.
1. Power Feeding Failure
2. MM Failure
3. MM Input Circuit Failure
1. Loose/Broken connection
2. Incorrect voltage at
DCLY ON-N
3. MCTL PWB Failure
MCTL
1. Loose/Broken connection
2. Incorrect voltage at
DCLM ON-N
3. MCTL PWB Failure
1. Turn on and off the power switch.
2. Above method 1 does not work, implement
"C3 Error Clearance Procedure".
3. Replace the failed MCTL P.W.B
1. Turn on and off the power switch.
2. Replace the failed MCTL P.W.B
1. Implement the same clearance procedures
employed for E2 error.
Note: MM stands for OPC Belt Drive Main
Motor.
1. Check connection between
Clutch (DCLY2).
2. Check voltages below:
a) Voltage drop (
ECN2-8 then, replace the clutch (DCLY)
b) Voltage jump (
ECN2-12 then, replace IOD2 PWB
3. Replace MCTL PWB
IOD2
12CN ECN1 ECN17
DCL(Y)ON-P
+24V-1
1 1
1
DCL(Y)ON-P
3
ECN2
+24V-1 5
PGND
8
SGND
12
1. Check connection between
Clutch (DCLM)
2. Check voltages below:
a) Voltage drop (
ECN2-8 then, replace the clutch (DCLM)
b) Voltage jump (
ECN2-12 then, replace IOD2 PWB
3. Replace MCTL PWB
IOD2
MCTL
12CN ECN1 ECN16
DCL(M)ON-P
2
2
ECN2
+24V-1 5
PGND
8
SGND
12
Clearance Method
ECN17 of IOD2 and
+24V
) between ECN17-3 and
) between ECN1-1 and
Developer Clutch(Y)
DCLY
ECN16 of IOD2 and
+24V
) between ECN16-3 and
) between ECN1-2 and
Developer Clutch(M)
+24V-1
1
DCLM
DCL(M)ON-N
3