Sylvania SRT2232X ELECTRICAL ADJUSTMENT INSTRUCTIONS

5-1 L6650EA

ELECTRICAL ADJUSTMENT INSTRUCTIONS

General Note:

"CBA" is abbreviation for "Circuit Board Assem-

bly."

NOTE:

Electrical adjustments are required after replacing

circuit components and certain mechanical parts.

It is important to perform these adjustments only

after all repairs and replacements have been com-

pleted.

Also, do not attempt these adjustments unless the

proper equipment is available.

Test Equipment Required

1. NTSC Pattern Generator (Color Bar W/White

Window, Red Color, Dot Pattern, Gray Scale,

Monoscope, Multi-Burst)

2. DC Voltmeter

3. Oscilloscope: Dual-trace with 10:1 probe,

V-Range:0.001~50V/Div,

F-Range: DC~AC-60MHz

4. Plastic Tip Driver

5. Remote control unit: Part No. N0138UD or N0139UD

6. DC power supply 13.2V/5A

How to make Service remote control unit:

1.

Prepare normal remote control unit. (Part No.

N0138UD or N0139UD) Remove 3 Screws from

the back lid. (Fig. 1-1)

2. Added J1 (Jumper Wire) to the remote control CBA.

(Fig. 1-2)

Notes:

1. The service remote control unit that be made in

above method is usable in the electrical adjustment

of the following models.

SRT2313/2319, SRT2213B/2219B, SRT2227X,

SRT2223X, SRT2223B, SRT2232X, SRT2220P

SRT4127P

2. The att ached remote control unit can not be used

as service remote control unit.

How to set up the service mode:

Service mode:

1. Use the service remote control unit.

2. Turn the power on. (Use main power on the TV

unit.)

3. Press "SLEEP" button on the service remote con-

trol unit. Version of micro computer will display on

the CRT. (Ex: 054-0.05)

4. Check the display on the lower left is "3815" and if

it is not "3815," set it at "3815" according to "2. Ini-

tial Setting."

1. +B Adjustment

Purpose: To obtain correct operation.

Symptom of Misadjustment: The picture is dark and

the unit does not operate correctly.

Note:TP601, TP300(GND), VR661 --- Main CBA

1. Connect DC Volt Meter to TP601 and TP300(GND).

2. Adjust VR661 so that the voltage of TP601 becomes

+132±0.5V DC.

SCREWS

REMOTE CONTROL UNIT Fig. 1-1

J 1

Fig. 1-2

REMOTE CONTROL CBA

Test Point Adj. Point Mode Input

TP601(+B)

TP300(GND) VR661 --- ---

Tape M. EQ. Spec.

--- DC Voltmeter +132±0.5V DC.

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