7-6
L4102BLP
Power Supply Block Diagram
CAUTION !
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,
REPLACE ONLY WITH THE SAME TYPE T 4A , 250 V FUSE.
NOTE :
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
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.
LINE
FIL
TER
L601
A
C601
A
C
CORD
BRIDGE
RECTIFIER
D605
HO
T
COLD
T601
11
9
12
14
15
16
7
4
3
1
2
MAIN CB
A
CN101A
Q505
Q504
Q503
HOT CIRCUIT. BE CAREFUL.
5
3
2
Q511
Q502
Q501
REG+5V
AL+3.3V
AL+8V
PR
O
TECT
-1
+12V
AL+33V
P-ON-H
Q506
Q633
PR
O
TECT
-2
IC631
+5V
REG
10
13
IC504
+3.3V
REG
IC601
ERR
OR
VO
LT
A
G
E
DET
Q507
Q512
VR649
TP401
+B
Q510
4
1
2
7
5
6
PR
O
TECT
-3
CN103A
AL+5V
P-ON-H2
AL+13V
Q508
CN101B
P
ANEL+25V
77
P
ANEL+3.3V
44
P
ANEL+10.8V
11
P
A
NEL+25V
P
A
NEL+3.3V
LCD MAIN CB
A UNIT
P
ANEL-6V
10
10
P
ANEL-6V
P
ANEL+10.8V
CN103B
AL+8V
14
14
AL+5V
13
13
AL+3.3V
11
11
REG+3.3V
AL+5V
AL+8V
15
15
REG+1.8V
AL+3.3V
IC101
+3.3V
REG
IC102
+1.8V
REG
Q511
SWITCHING
REGULA
T
O
R
IC602
+B ADJ
P-25V
-ON
AL+21V
T
O
LCD BA
CKLIGHT
BLOCK DIA
GRAM (A)
T
O
LCD BA
CKLIGHT
BLOCK DIA
GRAM (B)
4
3
1
2
+8V
REG
IC503
IC603
ERR
OR
VO
LT
A
G
E
DET
IC507
+5V
REG
INVER
TER CB
A
AL+21V
33
AL+21V
22
AL+21V
11
AL+21V
44
CN405
CN1401
P-ON-L
B
Comparison Char
t of
Models & Marks
Model
Mark
LCD-C1504
LCD-C2004
A
B
B
B
B
A
A
F601
T4A L 250V
Q603
Q602
D505
SHUNT
REGULATOR
(
(
D525
SHUNT
REGULATOR
(
(
D649
SHUNT
REGULATOR
(
(
