Sylvania 6509DD Service Manual page 34

DC Power Supply Block Diagram
Fixed voltage power supply circuit is used in this unit.
If Main Fuse (F951) is blown, check to see that all components in the power supply
circuit are not defective before you connect the DC plug to the DC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
JK951
DC JACK
F951
DC IN
8A/125V
8A 125V
IC951 (PWM CONTROL)
OSC
DRIVE
SHORT
PROTECTION
7 6 5
Q951
1
2
3
4
5
6
Q931
Q933
1
Q953
2
Q930 Q932
Q954,
SW/CTL
Q955
H.V./DC POWER SUPPLY CBA
1-9-9
CAUTION:
FOR CONTINUED PROTECTION AGAINST RISK OF FIRE,
REPLACE ONLY WITH SAME TYPE 8 A, 125V FUSE.
8A 125V
ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE MÊME TYPE DE 8A, 125V.
T951
11
10
VR951
+B
ADJ.
8
IC902
1 +4V REG. 2
5 4
Q934
Q935
Q956
Q952
NOTE :
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
WH554A WH555A CN901A
9 EV+4V 9
1 DVD-MAIN-POWER 1
3 AL+9V 3
6 P-ON+12V 5
11 P-ON+9V(2) 7
8 DC+13.2V 8
13 DEF+B 10
16 +B 13
17 +B 14
JUNCTION-A CBA
WH552 WH553 CN503
1 P-ON-H 1
JUNCTION-B CBA
1-9-10
9
1
3
5
FROM/TO POWER
7
SUPPLY BLOCK
8
CN602
10
13
14
TO POWER
SUPPLY BLOCK
1
CN1302
TD001BLDC