236
SuperScript 4400 — Maintenance Guide
23. White Print -
Blank page (no print at all) is outputted or specific color is missing (not printed)
Main Causes
1.
Laser light path is blocked by paper or other material stuck at opening of optical unit.
2.
Transfer Solenoid is not functioning.
3.
There is no belt bias voltage (CBV) injected.
4.
There is no output from the high voltage unit (HVU).
Countermeasures
1.
Ensure that there are no foreign particles stuck in the opening of optical unit.
2.
Replace the transfer solenoid with a new solenoid. (See Chapter 7)
3.
Replace the photoconductor belt module with a new unit. (See Chapter 6)
4.
Replace the high voltage unit (HVU) with a new unit. (See Chapter 7)
Fusing Unit
Transfer Unit
Paper Discharger Unit
Transfer Roller
Transfer Drum
Paper Feeding Roller
OPC Belt Cartridge
Paper Cassette
Drum Cleaner
Toner Cartridge
(K,Y,M,C)
K
Y
M
C
Optical Unit
Laser Path
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: ......