Service Error Codes
249
TROUBLESHOO
TING
1. Check
connector LCN3
2. Replace Optical Unit.
3. Replace MCTL P.W.B.
L1
Code
Description of Error
Cause of Error
Clearance Method
Optical Unit
L2
1. Loose/Broken connection
2. Optical Unit Failure
3. MCTL P.W.B. Failure
Optical Unit
(Beam Detecting Error)
1. Loose/Broken connection
2. Optical Unit Failure
3. MCTL P.W.B. Failure
1. Check these connections:
a) PDCN connector
b) LCN1 and LCN of MCTL
.
2. Replace Optical Unit.
3. Replace MCTL P.W.B.
MCTL
LCN
SGND
BDT
LDU
PDCN
LCN3
SM
PD
LCN1
+5V-1R
Optical Unit
SM
20
1. Check these connections:
a) LCN3
b) PDCN
c) LCN1 and LCN of MCTL
.
2. Replace Optical Unit.
3. Replace DC Power Supply(LVPS)
4. Replace MCTL P.W.B.
Optical Unit
LL
1. Loose/Broken connection
2. Optical Unit Failure
3. DC Power Supply(LVPS)
Failure
4. MCTL P.W.B. Failure
MCTL
SCMCLK
LDU
LCN3
SM
PD
Optical Unit
SM
1
2
3
4
5
SCMRDY
SCMON
GND
+24V-1
20
MCTL
LCN
LDU
PDCN
LCN3
SM
PD
LCN1
Optical Unit
20
5
3
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: ......