Mitsubishi Electric DD-4020 Service Manual page 18

Power Supply Block Diagram
CAUTION !
Fixed voltage power supply circuit is used in this unit.
If Main Fuse (F1001) 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.
D1001, D1002
AC1001
L1001
D1004, D1005
AC CORD F1001
1A 250V
CHOKE
COIL RECTIFIER
F
A V
Q1008
LATCH
1-6-11
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
"This symbol means fast operating fuse."
"Ce symbole reprèsente un fusible à fusion rapide."
BRIDGE
Q1003 Q1001
SWITCHING
SWITCHING
CONTROL
HOT
AV CBA
-REPLACE FUSE AS MARKED.
Q1010
T1001
D1003
2 11 RECTIFIER
D1030
12 RECTIFIER
IC1004
D1008
+3.3V
4 13 RECTIFIER REG.
D1009 Q1002
+12V
14 RECTIFIER
REG.
D1013
15 RECTIFIER
16
Q1006
D1016
7 17 RECTIFIER
6 18
IC1001
ERROR
VOLTAGE DET
4 1
3 2
Q1009 REG
(SHUNT REGULATOR)
NOTE :
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
Q1007
IC1003
REG
IC302
CN1001 5
CN501
1 EV+2.5V 1
2 EV+2.5V 2
3 P-ON+5V 3
4 P-ON+5V 4
12 EV+9V 12
13 EV+9V 13
14 EV+3.3V 14
15 EV+3.3V 15
16 P-ON+3.3V 16
Q1004
17 P-ON+3.3V 17
18 PWRCON 18
Q1005
P-ON+12V
F2
F1
-FL
P-ON+5V
P-ON+3.3V
EV+5V
COLD
1-6-12
+3.3V
4
REG.
P-ON+3.3V(A)
EV+2.5V
P-ON+5V(D)
P-ON+5V(A)
EV+9V
EV+3.3V
P-ON+3.3V(D)
FROM
SYSTEM
PWRCON
CONTROL
BLOCK
DIAGRAM
MAIN CBA UNIT
E5540BLP