Magnavox 19MDTR17, Service Manual, Page: 27 / 399

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