248
SuperScript 4400 — Maintenance Guide
1. Ensure the outlet is at the correct voltage
and amperage for the printer.
2. Replace the Fuser Unit with the correct unit.
3. Connect it properly.
4. Re-install Fuser Unit.
5.
Replace the connector.
6. Replace the lamp and lamp holder.
7. Replace the heater.
8. Replace the Low Voltage Power Supply
Unit (LVPS).
9.Replace MCTL PWB
H0
Code
Description of Error
Cause of Error
Clearance Method
Fuser Unit and Others
H2,
H3,
H4
1.
Input voltage
2. Fuser Voltage Rating
(110 or 220)
3. HP/HN connector not
connected
4. Fuser Unit improperly
installed
5. Fuser connector
damaged
6. Lamp Holder contract failure
7. Heater wiring cut or
damaged
8. Low Voltage Power Supply
Unit (LVPS) Failure
9. MCTL PWB Failure
Fuser Unit
1. Fuser Improperly
Installed
3. C
ontact failure due to
damaged connector of fuser
unit
4.
Loose/Broken connection
5. Defective Fuser Unit
6. IOD1 Failure
7. MCTL PWB Failure
1. Re-installe fuser unit.
3. Replace fuser unit.
4. Check the connection between
the fuser unit
and BCN2 of the high voltage unit (HVU)
5. Replace fuser unit.
6.
Replace
the IOD1
P.W.B.
7.Replace MCTL PWB
(wire
cut/
short
error
of ther-
mistor)
MCTL
11CN
42
44
TH1
TH2
IOD1
DCN1 DCN14
HVU
42
44
TH1
TH2
BCN2
TH2
TH1
16
18
16
18
Fuser Unit
Fuser Connector
1
2
3
4
Summary of Contents for Super Script 4400
Page 1: ...NEC SuperScript 4400 4400N Maintenance Guide 18 September 1998 Part Number 703 A0240 001 ...
Page 3: ...i SuperScript 4400 Maintenance Guide ...
Page 61: ...52 SuperScript 4400 Maintenance Guide ...
Page 71: ...62 SuperScript 4400 Maintenance Guide ...
Page 125: ...116 SuperScript 4400 Maintenance Guide ...
Page 189: ...180 SuperScript 4400 Maintenance Guide Toner Sensor TPD Toner Sensor TTR Fram Ass y ...
Page 193: ...184 SuperScript 4400 Maintenance Guide Stay A Ass y Transfer Drum ...
Page 203: ...194 SuperScript 4400 Maintenance Guide Stay A Ass y ...
Page 267: ...258 SuperScript 4400 Maintenance Guide ...
Page 273: ...264 SuperScript 4400 Maintenance Guide ...
Page 287: ...XIV SuperScript 4400 Maintenance Guide F G H I J ...
Page 289: ...XVI SuperScript 4400 Maintenance Guide ...
Page 293: ...ii Superscript 4200N and 4400 Series Maintenance Guide Addendum ...
Page 295: ...iv Superscript 4200N and 4400 Series Maintenance Guide Addendum ...
Page 302: ...7 ...
Page 314: ...19 NOTES ...
Page 315: ...20 Superscript 4200N and 4400 Series Maintenance Guide Addendum ...
Page 316: ......