FUNAI A8C72EP, Руководство по обслуживанию

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7-7
A8C72BLP
Power Supply Block Diagram
LINE FIL
TER
L601
AC
6
0
1
A
C
CORD
BRIDGE RECTIFIER
D611,D613, D614,D616
HO
T
COLD
T601
9
10 11 15 16
3
MAIN CB
A
HOT CIRCUIT. BE CAREFUL.
1 5 6
12 14
IC601
F601 T4A H 250V
Q600
Q601
P-ON-H1 P-ON-H2
PR
O
TECT
-1
PR
O
TECT
-2
RESET
T
O
SYSTEM
CONTR
OL
BLOCK DIA
GRAM
13
Q907
IC900
+5V REG.
Q902,D920
SW+3.3V
Q901,D916
+3.3V REG.
Q920
RESET
Q922,D936
SW+13V
Q906,D926
+9V REG.
Q904
Q911,Q912
SW+25V
Q900
Q903
SWITCHING
SWITCHING
CONTR
O
L
FEED BA
CK
1
4 3
2
Q936,D985
+5V REG.
AL+12V P-ON+9V AL+3.3V P-ON+5V P-ON+3.3V
INV+22V
2,5,6
CN105A CN104A
CN3601
CN101A
CN3701
CN102A
CN4503
LCD+24.5V
8
18
AL+3.3V
3
23
P-ON+5V
1,2
24,25
LCD+3.3V
12
14
P-ON+9V
14
12
LCD-6.8V
10
16
LCD+13V
5-7
19-21
P-ON+3.3V
15-17
9-11
Q908
SW
-6.8V
IC902
+3.3V REG.
1
2
4
LCD+24.5V LCD-6.8V LCD+13V P-ON+3.3V +3.5V(1) +3.5V(2) LCD+3.3V AL+3.3V P-ON+5V P-ON+9V
DIGIT
AL MAIN CB
A UNIT
TO INVER
T
ER
BLOCK DIA
GRAM
(CL404)
+3.5V(1)
18,19
7,8
+3.5V(2)
22-24
2-4
NOTE: The voltage for parts in hot circuit is measured using hot GND as a common terminal.
CAUTION ! For continued protection against fire hazard, replace only with the same type fuse.
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.