Power Supply Block Diagram

CAUTION !

 

 

 

 

 

 

 

 

Fixed voltage ( or Auto voltage selectable ) power supply circuit is used in this unit.

 

 

 

 

 

 

 

 

If Main Fuse (F601) is blown, check to see that all components in the power supply

 

 

 

 

 

 

CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE,

NOTE :

circuit are not defective before you connect the AC plug to the AC power supply.

 

 

 

 

 

 

REPLACE ONLY WITH SAME TYPE 4 A, 125V FUSE.

The voltage for parts in hot circuit is measured using

 

 

 

 

 

Otherwise it may cause some components in the power supply circuit to fail.

4A/125V ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE MÊME TYPE DE 4A, 125V.

hot GND as a common terminal.

HOT CIRCUIT. BE CAREFUL.

 

 

 

 

 

 

 

 

 

 

 

 

 

HOT

COLD

 

 

 

 

 

 

 

 

 

T601

 

 

 

 

 

 

 

DEF +B

4A/125V

 

 

 

 

 

 

 

 

 

 

F601

L601

D605 - D608

 

 

 

TP601

 

 

 

 

PROTECT-2

4A/125V

 

 

 

 

 

 

 

 

 

 

LINE

BRIDGE

 

 

 

+B

 

 

 

 

(TO PIN 67 OF IC333)

 

 

 

 

 

 

 

 

 

6

9

 

 

 

 

 

 

+B

AC601

FILTER

RECTIFIER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AC CORD

 

 

 

 

 

 

 

 

 

 

AL+33V

CN691

 

 

 

 

 

Q672

 

 

 

Q111

BACK-UP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+5V

 

L691

 

 

 

10

 

SWITCHING

 

 

 

P-ON+5V

 

 

 

 

 

 

 

SWITCHING

DEGAUSSING

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COIL

 

 

 

 

 

Q851

 

 

 

 

+5V CTRL2

PS691

 

 

 

 

 

 

 

 

Q321

(FROM PIN 18 OF IC333)

 

 

 

 

 

 

+9V

 

Q961

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+9V

 

 

 

 

4

11

 

REGULATOR

+5V

AL+9V

 

 

 

 

Q673

 

REGULATOR

SWITCHING

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SWITCHING

 

 

 

 

 

 

 

 

 

12

 

CONTROL

 

 

 

 

AL+12V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P-ON+5V

 

Q601

 

 

 

 

 

 

Q681

+8V

 

 

 

SWITCHING

 

2

14

 

 

 

 

P-ON+8V

 

 

 

 

 

 

SWITCHING

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+8V CTRL

 

 

 

 

 

 

 

 

 

 

 

(FROM PIN40 OF IC333)

 

Q602

 

 

 

 

 

 

Q682

 

 

 

 

LIMITER

1

13

 

 

 

 

 

 

 

 

 

 

 

 

+5V

 

P-ON+5V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SWITCHING

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+5V CTRL

 

 

 

 

 

 

 

 

 

Q683

 

(FROM PIN28 OF IC333)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+5V

 

 

 

 

 

 

 

 

 

 

 

SWITCHING

 

 

 

 

 

4

1

 

 

 

 

 

 

PROTECT-1

 

 

 

IC601

 

 

 

 

 

 

 

 

 

 

 

 

 

Q831

 

 

 

(TO PIN68 OF IC333)

 

 

 

ERROR

 

 

 

 

 

 

 

 

 

 

 

VR661

SWITCHING

 

 

 

 

 

 

VOLTAGE DET

 

 

 

 

 

 

 

 

 

 

P-ON-ON

 

 

 

 

 

 

 

 

 

+B ADJ

 

 

 

 

 

 

3

2

Q652

 

 

 

 

P-ON+12V

 

 

 

 

 

Q841

 

 

 

 

 

 

FEED

 

 

 

 

 

 

 

 

 

 

 

(SWITCHING)

 

 

 

 

 

 

 

BACK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RL601

 

 

 

 

 

Q191

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Q674

 

 

SWITCHING

 

 

 

 

 

 

 

 

 

P-ON-ON

 

 

 

 

 

 

 

 

SWITCHING

 

 

 

 

P-ON-H

 

 

 

 

 

 

P-ON-ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(FROM PIN79 OF IC333)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Q696

DG-ON-H￿

 

Q832

 

 

 

 

 

 

 

 

(FROM PIN74 OF IC333)

 

 

 

 

 

 

 

 

 

SWITCHING

 

SWITCHING

 

 

 

 

 

 

 

 

 

MAIN CBA

 

 

 

 

 

 

DG-ON-ON

 

 

P-ON-ON

 

 

 

6-9

 

 

 

 

 

 

￿6-10

 

L6650BLP

Page 27
Image 27
Sylvania SRT2232X service manual Power Supply Block Diagram, L6650BLP, HOT CIRCUIT. be Careful

SRT2232X specifications

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