Xerox 7750DXF - Phaser Color Laser Printer - Page 358

10-34 Phaser 7750 Printer Service Manual
DC Power Generation 3.3 VDC
1
2
1.2
16.1
7.11
7.1
ALL
ALL
ALL
ON/
OFF
ALL
1.1B 1.1B
MCU +3.3V
ENABLE SIGNAL
POWER ON ACH
(TO +3.3V LVPS)
POWER ON ACH
(TO +3.3V LVPS)
1.3 DC POWER GENERATION (3.3VDC)
+3.3V LOW VOLTAGE POWER SUPPLY 1 PL9.1
J15A
BLK
WHT
GRN
+3.3VDC POWER GENERAT- ION
12
6 9 4 8
11
1
1 2
3 4 8
10 11
1 3 5 7
VIO
GRY
VIO
GRY
VIO
GRY
VIO
GRY GRY GRY GRY
GRY
GRY
GRY
VIO
VIO
VIO VIO
VIO
P510
P510
P510 P668
J668 J555
J510 J300
J400
VIO
3 5
T3
B8
B9 B6
B5 B7
B11
ESS PWB PL13.1
+3.3VDC-1
+3.3VDC +3.3VDC
+3.3VDC-2
MCU PWB PL13.1
1/F PWB P19.1
P/J410
32 56
B3
B10
J532
YEL YEL
J536
+3.3VDC
(MSI SIZE SENSOR)
+3.3VDC TRAY 1
SIZE SENSOR
WITH 3TM ATTM (FX ONLY)
TRAY MODULE PWB PL15.9/ 16.15
55 6
5 66
DC COM
1 2
Wiring in MCU PWB Short Circuit Protection (Overcurrent Protection) When +3.3V DC circuit is shorted, the output droops. The output auto-recovers in 10 sec. after recovery from the short circuit. Overvoltage Protection When +3.3V DC output reaches +4-+5V DC, the output is cut off. The output recovers at power on 60 sec after power off.
NOTE:
7750-264