Epson AcuLaser C1100 Service Manual page 522

EPSON AcuLaser C1100
1. DC POWER SUPPLY
Overcurrent Protection
All outputs (+24VDC, +5VDC, +3.3VDC) from LV/HVPS are stopped when
short-circuiting on the way to the earth or ground. Each output is restored by
eliminating the cause of the short-circuit, and turning the printer OFF and then
back ON after a fixed time has elapsed. The overcurrent protection circuit is
actuated when a current exceeds 16A flows.
Overvoltage Protection
All outputs from LV/HVPS are stopped when an overvoltage is detected.The
operating voltages for overvoltage protection of each output are as follows:
+24VDC:36VDC
+5VDC:7VDC
+3.3VDC:5VDC
Power save
Name of signal line
POWER SAVE Signal for turning +24VDC OFF
Output stopped by Interlock Switch
Name of signal line
I/L +5VDC
The I/L +5VDC signal that arrives via Front Interlock Switch, Upper
Interlock Switch and Fuser Interlock Switch becomes the power source of the
LV/HVPS internal Relay coil. This signal opens/closes Relay contacts, and
controls INTERLOCK +24VDC and INTERLOCK +5VDC.
APPENDIX
Remarks
Remarks
Wiring Connection Diagram between Parts
LV/HVPS
PL12.2.3
P/J500
3
Power
Save 4
P/J502 P/J115
+5VDC
13 1 3
I/L +5VDC
15
+5VDC
+5VDC
P/J500
Supply
5
P/J502
3
4
+24VDC
+24VDC
Supply
5
6
7
8
+3.3VDC
+3.3VDC
Supply
1
2
9
10
11
12
P/J503
3
1
Figure 7-8. DC POWER SUPPLY Connection and Wiring Diagram
Revision B
PWBA MCU
PL12.2.1
P/J401
POWER SAVE
20
19
SWITCH- SWITCH
ASSY
INLK
TOP
FRONT
P/J115 P/J116 P/J116
PL.1.1.27 PL.1.1.7
1 3 1 3 1 3
SWITCH-
INLK
FUSER
PL.1.1.34
P/J117 P/J117
3 1 3 1
PWBA MCU
PL12.2.1
P/J401
Interlock
I/L +5VDC
18 +5VDC
P/J410 +5VDC
+5VDC
3
SG
4
INTERLOCK
+24VDC
I/L +24VDC
5
I/L +24VDC
6
SG
7
SG
8
+3.3VDC
+3.3VDC
1
SG
2
MOT ASSY P/R
PL11.1.6
Interlock
P/J201
+24VDC
I/L +24VDC
1
SG
2
PWB ASSY
ROT
PL12.1.10
P/J432
Interlock
I/L +24VDC
1
+24VDC
SG
3
PWBA FUSER CONTROL
PL12.2.12
P/J2
3
1
Leg_Sec007_002FB
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