NEC Super Script 4400, Maintenance Manual

Page: 250 / 317

Service Error Codes 241
TROUBLESHOO
TING
1. Ensure that the belt cartridge rotates freely.
If not, replace the belt cartridge.
2. Ensure that the fuser rotates freely.
If not, replace the fuser.
3.Check the connections between:
a) ECN12 of IOD2 and the connector of DM1 .
b) ECN2 of IOD2 and DCN9 of IOD1 .
c) ECN1 of IOD2 and I2CN of MCTL .
NOTE: If any of the above connections are
defective replace the main motor.
4. Check voltages below:
a)
+24V-1: between MM1-4 and 5,ECN12-4 and 5,
ECN2-5 and 8 . If not replace main motor
b) +5V-1: between MM1-6 and 7,ECN12-6 and 7,
ECN2-11 and 12. If not replace main motor.
5. Replace MCTL PWB
6. Replace MCTL PWB
7. Replace MCTL PWB
E1
Code Description of Error Cause of Error Clearance Method
Main Motor(MM) E2
1. Belt cartridge Failure
2. Fuser Failure
3. Loose/Broken connection
4. Defective Main Motor
5. IOD2 Failure
6. IOD1 Failure
7. MCTL PWB Failure
Developer Motor(DM) 1. Defective toner cartridge/
d
eveloper gear unit and
motor
2. Loose/Broken connection
3. Defective developer
motor
4. IOD2 Failure
5. IOD1 Failure
6. MCTL PWB Failure
1. Check for any unusual rotation noise while
printing then replace the suspected toner
cartridge. If the noise continues replace the
developer gear unit and motor.
2. Check the connections between:
a) ECN15 of IOD2 and the connector of DM1 .
b) ECN1 of IOD2 and DCN9 of IOD1 .
c) ECN1 of IOD2 and I2CN of MCTL .
3. Check voltages below:
a)
+24V-1: between DM1-4 and 5,ECN15-4 and 5,
ECN2-5 and 8 . If not replace developer motor
b) +5V-1: between DM1-6 and 7,ECN15-6 and 7,
ECN2-11 and 12. If not replace developer motor.
4. Replace MCTL PWB
5. Replace MCTL PWB
6. Replace MCTL PWB
MCTL
12CN
11
12
DMCLK
DMON-N
IOD2
11
12 ECN1
ECN2
ECN
15
1
2
3
4
5
6
7
8
9
LVPS
IOD1
DCN9
5
8
11
12
+24V-1
PGND
+5V-1
SGND
DM1
DM
1
2
3
4
5
6
7
8
9
DMRDY-N
DMON-N
DMCLK
PGND
+24V-1
SGND
+5V-1
NC
DMREV-N
5
8
11
12
SEE WIRING DIAGRAM ON NEXT PAGE