Hitachi 9305 Manuel Technique page 90

6-5 Power Supply Block Diagram
NOTE :
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
HOT CIRCUIT. BE CAREFUL.
F1001
L1003 D001 - D004
AC1001
T1.6AL/250V
LINE BRIDGE
RECTIFIER
FILTER
Q1003
Q1008
HOT
POWER SUPPLY CBA
CAUTION
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,
REPLACE ONLY WITH THE SAME TYPE T1.6AL/250V FUSE.
T001
2 20
19
4 18
17
Q1001
16
15
IC1051
+1.5V
14
REG.
+3.3V
7 13
REG.
IC1052
12
8 11
IC1001
ERROR
VOLTAGE DET
4 1
3 2
Q1009
REG
(SHUNT REGULATOR)
CAUTION !
Fixed voltage (or Auto voltage selectable ) power supply circuit is used in this unit.
If Main Fuse (F001) 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.
CL001 CL001 CN003 CN050
1
1 AL+44V 1 1
3 AL+12V 3
3 3
5 AL+5V 5
5 5
6 AL+5V 6 6 6
8 AL+20.5V 8 8 8
10 10
12 12
14 14
18 18
17 17
16 16
CL002 CL002
1 AL-30V 1
3 AL+1.5V 3
5 AL+3.3V 5
9 F1 9
8 F2 8
7
7 P-OFF-H
JUNCTION
CBA
COLD
Q053,Q054
SW+44V P-ON+44V
P-ON+15V
P-ON-H
<FROM PIN 67 OF IC501>
AL+12V
AL+12V
Q055
SW+9V AL+9V
AL+5V
Q056
SW+5V P-ON+5V
Q058
SW+5V TIMER+5V
Q057
Q059
P-DOWN-L
Q051,Q052
<TO PIN 86 OF IC501>
SW+20.5V AL+20.5V/+12V
C-POW-SW
<FROM PIN 66 OF IC501>
AL-30V
Q1055
SW+5V
Q1052
SW+3.3V
EV+5V
DVD P-ON+5V
DVD P-ON+3.3V
SW+12V DVD P-ON+12V
Q1053,
-FL
Q1054
F1
F2
P-OFF-H
<TO PIN 73 OF IC501>
MAIN CBA
CN1051
1 EV+1.5V
2 EV+1.5V
3 EV+1.5V
4 EV+3.3V
5 EV+3.3V
13 P-ON+5V
14 EV+9V
15 EV+9V
17 P-ON+3.3V
19 PWRCON
33