7-5
Power Supply Block Diagram
L2601BLP
4A/125V
F601
4A/125V
LINE
FILTER
L601
AC601
AC CORD
BRIDGE
RECTIFIER
D605 - D608
HOT COLD
T601
12
13
16
14
11
4
4
3
1
2
IC601
ERROR
VOLTAGE DET
Q601
Q603
SWITCHING
CONTROL
SWITCHING
MAIN CBA
2
6
7
PANEL+25V
26
PANEL-6V
21
PANEL+3.3V1
PANEL+3.3V23
AL+13V
P-ON-H
P-25V-ON
BACKLIGHT-ADJ
Q632
Q504
Q501
SW+25V
Q503
+10.8V REG.
Q506
SW-6V
HOT CIRCUIT. BE CAREFUL.
CN1207
PANEL+3.3V24
PANEL+10.8V4
PANEL+10.8V5
Q505
Q502
+1.5V
D+3.3V
P-ON-5V
AL+3.3V
10
9
INV+22V
+40V
TP401
INV+22V
TO SYSTEM
CONTROL
BLOCK
DIAGRAM
TO LCD
BACKLIGHT
BLOCK
DIAGRAM
D647
SHUNT
REG.
IC1605
+5V REG.
IC1606
+5V REG.
Q402
Q401
Q403
IC1603
+1.5V REG.
IC1602
+3.3V REG.
VT+33V
D505 SHUNT
REG.
TO
LCD MODULE
CAUTION !
Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.
If Main Fuse (F601) is blown , check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
For continued protection against risk of fire,
replace only with same type 4 A, 125V fuse.
CAUTION ! :
ATTENTION : Utiliser un fusible de rechange de même type de 4A, 125V.
4A/125V
NOTE:
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
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