Magnavox 19MDTR20 Service Manual page 27

Power Supply Block Diagram
CAUTION !
Fixed voltage power supply circuit is used in this unit.
If Main Fuse (F2601) 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.
4A 125V
F2601 L2601 D2603 D2606
W2601
4A/125V
BRIDGE
LINE
RECTIFIER
FILTER
DEGAUSSING CN2601
COIL
PS2601
CAUTION:
4A 125V
ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE MÊME TYPE DE 4A, 125V.
NOTE :
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
T2601
12
7
16
Q2601
SWITCHING 5
15
14
13
11
3
10
2 9
IC2601
ERROR
VR2601
VOLTAGE DET
+B ADJ
4 1
Q2604
FEED
Q2602 3 2
BACK
COLD
HOT
1-5-13
FOR CONTINUED PROTECTION AGAINST RISK OF FIRE,
REPLACE ONLY WITH SAME TYPE 4 A, 125V FUSE.
CN2602 TO CN502
Q2606 Q2609
Q2614
Q2613
Q2607
CN2803
Q2605
Q2615
IC2603
+3.3V
1 2
REG.
4
Q2617
Q2611
IC2604
Q2610
REG.
Q2612
POWER SUPPLY/AV CBA
NOTE FOR WIRE CONNECTORS:
1. PREFIX SYMBOL "CN" MEANS CONNECTOR.
(CAN DISCONNECT AND RECONNECT.)
2. PREFIX SYMBOL "CL" MEANS WIRE-SOLDER
HOLES OF THE PCB.
(WIRE IS SOLDERED DIRECTLY.)
IC1602
+5V REG.
5 +B Q1608
6 +B
SW+5V
3 DEF+B
Q1611
SW+5V
Q1613
SW+5V
CN2804 CN1803
9 AL+33V 9
19 D/L+15V 19
8 AL+5.7V 8
10 P-ON+12V 10
4 P-ON+9V(1) 4
6 P-ON+9V(2) 6
18 P-ON+12V 18
CN1804
2 P-ON+9V(3) 2
19 AC-DOWN 19
9 P-ON-H 9
16 DVD-MAIN-POWER 16
MAIN CBA
IC2602
CN2402 CN401
+1.5V
1 2 1 EV+1.5V 1
REG.
2 EV+1.5V 2
4
3 EV+1.5V 3
4 EV+3.3V 4
5 EV+3.3V 5
13 DVD-ON+5V 13
14 AL+9V 14
15 AL+9V 15
17 DVD-ON+3.3V 17
Q2608
19 PWRCON 19
1-5-14
P-ON+5V
P-ON+5V
P-ON+5V
P-ON+5V
FROM CHROMA
+5V-CTRL
BLOCK
AL+33V
D/L+15V
T+5V
P-ON+12V
P-ON+9V
AL+5V
P-ON+12V
Q1612
P-DOWN
(TO PIN84 OF IC1201)
P-ON+9V
P-ON-H
(FROM PIN31 OF IC1201)
DVD-MAIN-POWER
(FROM PIN42 OF IC1201)
EV+1.5V
EV+3.3V
DVD-ON+5V
AL+9V
DVD-ON+3.3V
PWRCON
FROM DVD SYSTEM
CONTROL
/SERVO BLOCK
<DVD SECTION>
DVD MAIN CBA UNIT
TD857BLP