Power Supply Block Diagram - Hitachi DV-PF2U Service Manual

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.
F
A V
F1001
L1001
D001 - D004
AC1001
1A 250V
LINE BRIDGE
RECTIFIER
FILTER
Q1008
HOT
CAUTION
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,
F
REPLACE ONLY WITH THE SAME TYPE FUSE.
A V
ATTENTION : POUR UNE PROTECTION CONTINUE LES RISQES
D'INCELE N'UTILISER QUE DES FUSIBLE DE MEMO TYPE.
RISK OF FIRE -REPLACE FUSE AS MARKED.
"This symbol means fast operating fuse."
"Ce symbole reprèsente un fusible à fusion rapide."
T001
20
2
19
4 18
17
Q001
16
15
Q1003
14
8 13
12
7 11
IC1001
ERROR
VOLTAGE DET
4 1
3 2
IC1006 REG
(SHUNT REGULATOR)
CAUTION !
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.
Fixed voltage power supply circuit is used in this unit.
Q055
Q052
Q060
IC1004 IC1002
+3.3V +3.3V
REG. REG.
Q1011
Q1007
IC1003
+5V
REG.
Q1004
+5V
REG.
MAIN CBA
AL+44V
AL+12V
P-ON+9V
AL+5V
TIMER+5V
AL-30V
P-ON-L
P-ON+5V
P-DOWN-L
EV+5V
Q056
-FL
F2
F1
P-ON+12V
Q1002
Q1006
CN1001
1 P-ON+1.8V
Q1005
2 P-ON+1.8V
20 PWRCON
17 P-ON+3.3V
Q1015
18 P-ON+3.3V
19 P-ON+3.3V
3 EV+2.5V
4 EV+2.5V
16 EV+3.3V
14 EV+9V
15 EV+9V
5 P-ON+5V
6 P-ON+5V
4-2-5