NEC Super Script 4400 Maintenance Manual page 251

Code Description of Error
Main Motor(MM)
E2
(Continued)
E3
Drum HP Sensor
242 SuperScript 4400 — Maintenance Guide
Cause of Error
MCTL
12CN
MMCLK
7
MMON-N
8
MMREV-N
9
MMENC
10
IOD1
+24V-1
5
PGND
8
+5V-1
11
SGND
12
1. Belt Cartridge Insatalled
Incorrectly.
2. Transfer Drum Failure
3. Loose/Broken connection
4. Defective Drum HP
Sensor
5. Low Voltage Power
Supply (LVPS) Failure
6. E3 Error Continues
MCTL
1LCN
HPSEN-N
45
LVPS
ACN1
+5V-1
SGND
Clearance Method
MM1
IOD2
MMRDY-N
7
1 1
ECN1
MMON-N
8
2 2
MMCLK
9
3 3
10
PGND
4 4
ECN12
+24V-1
ECN2
5 5
SGND
6 6
5
+5V-1
7 7
8 MMENC
8 8
11 MMREV-N
9 9
12
1. Re-install the belt cartridge.
If damaged, replace the belt cartridge.
2. Ensure that the transfer drum rotates freely.
If not, replace the transfer drum.
3.Check the connections between DCN5 of
IOD1 and the drum HP sensor connector.
4. Check voltages below:
a) If voltage is +5V between DCN5-1 and 3.
Replace Drum HP Sensor.
b) If voltage is +5V between DCN2-1 and 2.
Replace IOD1 P.W.B.
NOTE: If this does not clear the error replace
MCTL P.W.B.
5. Replace Low Voltage Power
Supply (LVPS) Failure
6. Re-check steps 1-5.
IOD1
Drum PH Sensor
(EN)
DCN5
45
Relay connector
+5V-1
DCN1
1 1
HPSEN-N
DCN2
2 2
SGND
3 3
1
2
MM
1
2
3