Sylvania SRT2232X Audio Block Diagram

Audio Block Diagram

MAIN CBA

AUDIO SIGNAL

6-5 6-6 L6650BLA

A-MUTE-H

VOLUME

FROM/TO

SYSTEM CONTROL

BLOCK

INPUT 0

INPUT 1

SCL

SDA

SP802

SPEAKER

R-CH

CN802

SP-R 1

SP-GND 2

SP801

SPEAKER

L-CH

CN801

SP-L 1

SP-GND 2

IC771 (INPUT SELECT)

SW CTL

9 10

Q751

AMP

Q761

AMP

VCA STEREO

FILTER 75uS

DE-EMPH

dBX

DE-EMPH

L+R

FILTER

WIDE BAND

FILTER WIDE BAND

RMS DET WIDE BAND

EXPAND

SPECTRAL

EXPAND

SPECTRAL

RMS DET

SPECTRAL

FILTER

OFFSET

CANCEL

L-CH

R-CH

MATRIX AGC

OFFSET

CANCEL L-R

FILTER

(L-R)/SAP

SAP

FILTER

I2C

DECORDER

SAP

DEMOD SAP OUT

FILTER

FROM

IF/VIDEO BLOCK

TUNER

REAR

FRONT

TUNER

REAR

FRONT

(L-CH)

(R-CH)

IC431 (MTS/SAP AUDIO SIGNAL PROCESS)

AUDIO-IN(L)

(REAR)

JK702

SIF

JK703

IC801 (AUDIO AMP)

VOL.

VOL. 12

Q792 Q791 Q793 +8V

Q794

WF6

A-O-MUTE

Q825

AUDIO-IN(R)

(REAR)

JK722

AUDIO-IN(L)

(FRONT)

JK723

AUDIO-IN(R)

(FRONT)

AUDIO-OUT(L)

(REAR)

AUDIO-OUT(R)

(REAR)

OFFSET

CANCEL

Contents

Main IMPORTANT SAFETY NOTICE TABLE OF CONTENTS SPECIFICATIONS <TUNER> <DEFLECTION> <VIDEO & CHROMA> <AUDIO> IMPORTANT SAFETY PRECAUTIONS Safety Precautions for TV Circuit + _ EARTH GROUND Page Precautions during Servicing Safety Check after Servicing 1. Clearance Distance 2. Leakage Current Test STANDARD NOTES FOR SERVICING Circuit Board Indications How to Remove / Install Flat Pack-IC 1. Removal Caution: Page 2. Installation Instructions for Handling Semiconductors 1. Ground for Human Body <Correct> 2. Ground for Workbench Example : CABINET DISASSEMBLY INSTRUCTIONS 1. Disassembly Flowchart 2. Disassembly Method Reference Notes in the Table [1] Rear Cabinet [2] CRT CBA [3] Main CBA [4] CRT Page TV Cable Wiring Diagram Fig. 5 4-3 L6650DC ELECTRICAL ADJUSTMENT INSTRUCTIONS Test Equipment Required How to make Service remote control unit: How to set up the service mode: Service mode: 2. Initial Setti ng 3. AV Memory Setting data 4. Setting for BRIGHT, CONTRAST, COLOR, TINT and SHARPNESS data Values 5. Black Stretch Control Adjustment 6. Purity Check 7. SD Check Mode SD Check mode (Factory mode) 8. H. Position Adjustment 9. V. Size Adjustment 10. V. Position Adjustment 11. U-Pedestal Adjustment 12. V-Pedestal Adjustment 13. Software Reset 14. H. Size Adjustment 15. PIN Cushion Adjustment 16. Cut-off Adjustment 17. White Balance Adjustment Color Analyzer Fig. 3 18. Sub-Brightness Adjustment 19. Focus Adjustment 20. Purity Adjustment White Black Fig. 4 This bar just visible 21. Convergence Adjustment Fig. 6 C.B. MAGNET (RB-G) Fig. 8 L6650BLS BLOCK DIAGRAMS 6-1 6-2 System Control Block Diagram MAIN CBA L6650BLIF6-3 6-4 IF/Video Block Diagram MAIN CBA VIDEO SIGNALRF/IF SIGNAL AUDIO SIGNAL Audio Block Diagram MAIN CBA AUDIO SIGNAL 6-5 6-6 SIF CRT/H.V. Block Diagram MAIN CBA CRT CBA VIDEO SIGNAL 6-7 6-8 HOT COLD MAIN CBA NOTE : The voltage for parts in hot circuit is measured using hot GND as a common terminal. TP601 Q674 SCHEMATIC DIAGRAMS / CBA'S AND TEST POINTS Standard Notes Note: Note of Capacitors: Temperature Characteristics of Capacitors are noted with the following: LIST OF CAUTION, NOTES, AND SYMBOLS USED IN THE SCHEMATIC DIAGRAMS ON THE FOLLOWING PAGES: Page Page Page Page Main CBA T op View 4A/125V 7-11 BL6650F01011-1 7-12 Main CBA Bottom View CRT CBA Top View CRT CBA Bottom View WAVEFORMS WIRING DIAGRAM CRT CBA MAIN CBA BL6650F01011-1 9-1 L6650WI BL6650F01011-2 IC PIN FUNCTIONS IC333 (TV Micro Computer) Page V501 PB6 PB6 EXPLODED VIEWS Cabinet Packing 11-3 L6250PEX MECHANICAL PARTS LIST Table 1 (V501 and DY551 Combination) CRT Type No. CRT CRT Warning Label Location ELECTRICAL PARTS LIST MAIN CBA MMA CBA CAPACITORS 20030303 13-2 L6650EL 20030303 13-3 L6650EL 20030303 13-4 L6650EL CONNECTORS DIODES 20030303 13-5 L6650EL ICS COILS 20030303 13-6 L6650EL TRANSISTORS Ref. No. Description Part No. 20030303 13-7 L6650EL RESISTORS 20030303 13-8 L6650EL 20030303 13-9 L6650EL 20030303 13-10 L6650EL SWITCHES CRT CBA 20030303 13-11 L6650EL MISCELLANEOUS CAPACITORS 20030303 13-12 L6650EL CONNECTORS DIODES COILS TRANSISTORS