Xerox Phaser 3120 - Page 61

6-2
BLOCK DIAGRAM
Service Manual
6.2 Phaser 3120
MHVPWM
THVPWM
F.G
EXIT-SENSOR
FEED-SENSOR
P/EMPTY-SENSOR
MP-SENSOR
IN-LET
-
+
GND
THV-RD
BIASPWM THV_EA
HEATER-THERMISTOR
+24V
+5V +3.3V
FAN
POWER
CORD
Crystal
12MHz
Main Clock
Power On Reset
SMPS + Main 26p
CPU Jupiter 4
+24V
Main Motor
C-CLUTCH
USB
HEATER-AC
SMPS PART's
COVER OPEN SW
CN8
CN8
CN11
CN6 CN1 CN3
CON4
CON1 CN2 CN9
HVPS PART'S
VOLTAGE
DETECTOR
PTL
LSU
PANEL B’D
2 LED
1KEY
MHV
OPC GND
SUPPLY
DEV
THV
FUSER ASS’Y
M-CLUTCH
MOTOR DR PART'S
FLASH
MEMORY
0.5MB
(128Kx32bits)
ARM7
90MHz
Video
Clock
LD
SSCG