Sharp 21L-FG1SA User Manual

SERVICE MANUAL
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CHAPTER 1. SPECIFICATIONS
[1] SPECIFICATIONS ......................................... 1-1
CHAPTER 2. IMPORTANT SERVICE NOTES
[1] IMPORTANT SERVICE NOTES .................... 2-1
CHAPTER 3. ADJUSTMENT PRECAUTIONS
[1] ADJUSTMENT PRECAUTIONS .................... 3-1
[2] ADJUSTMENT ............................................. 3-15
CHAPTER 4. MEMORY MAP
[1] MEMORY MAP .............................................. 4-1
CHAPTER 5. TROUBLE SHOOTING FLOWCHART
[1] TROUBLE SHOOTING FLOWCHART .......... 5-1
CHAPTER 6. SOLID STATE DEVICE BASE DIA-
GRAM
[1] SOLID STATE DEVICE BASE DIAGRAM........ 6-1
CHAPTER 7. CHASSIS LAYOUT
[1] CHASSIS LAYOUT ........................................ 7-1
CHAPTER 8. BLOCK DIAGRAM
[1] BLOCK DIAGRAM: MAIN UNIT ....................8-1
[2] BLOCK DIAGRAM: CRT UNIT ......................8-5
CHAPTER 9. DESCRIPTION OF SCHEMATIC DIA-
GRAM
[1] DESCRIPTION OF SCHEMATIC DIA-
GRAM............................................................9-1
CHAPTER 10. WAVEFORMS
[1] WAVEFORMS .............................................10-1
CHAPTER 11. SCHEMATIC DIAGRAM
[1] SCHEMATIC DIAGRAM: MAIN UNIT.......... 11-1
[2] SCHEMATIC DIAGRAM: CRT UNIT ........... 11-5
CHAPTER 12. PRINTED WIRING BOARD ASSEM-
BLIES
[1] PWB-B: CRT UNIT ......................................12-1
[2] PWB-A: MAIN UNIT ....................................12-2
Parts Guide
TopPage
21L-FG1SA/SF/SM/RU
No. S551721LFG1SA
COLOUR TELEVISION
Chassis No.GA-6
MODELS
21L-FG1SA
21L-FG1SF
21L-FG1SM
21L-FG1RU
■ Blue Back Function
■ Aperture Control Circuit
■ Auto Fine Tuning
■ NTSC Colour Comb Filter (AV THRU)
■ High Contrast Picture
■ Hotel Mode
■ White Temperature Select
■ AV Stereo
FEATURES
■ Multi 18 Systems
■ Full Auto Channel Preset and Auto
Channel Skip
■ 100-CH Program Memory
■ CATV (Hyper Band) Ready
<Used Frequency Synthesizer Tuner>
■ Black Stretch Circuit
■ On Timer/Off Timer/Reminder Timer
■ Multi Languages OSD
(English/Chinese/French/Malay and Arabic) for
Model 21L-FG1SA/SM
(English/Chinese/French/Malay/Arabic and
Russian) for Model 21L-FG1SF
(English and Russian) for Model 21L-FG1RU
■ Surround Sound Effect
(With Bass/Treble/Balance)
■ Rear AV IN / OUT Terminals
In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and
only parts identical to those specified should be used.
CONTENTS
The chassis in this receiver is partially hot. Use an isolation transformer between the line cord plug and power receptacle, when servicing
this chassis. To prevent electric shock, do not remove cover. No user-serviceable parts inside. Refer servicing to qualified service personnel.
WARNING

Sharp 21L-FG1SA Specifications

General

Brand	Sharp
Model	21L-FG1SA
Category	TV
Language	English

Summary

Chapter 1. SPECIFICATIONS

[1] SPECIFICATIONS

Chapter 2. IMPORTANT SERVICE NOTES

[1] IMPORTANT SERVICE NOTES

Crucial safety precautions for servicing the TV, including high voltage and X-ray hazards.

Chapter 3. ADJUSTMENT PRECAUTIONS

[1] ADJUSTMENT PRECAUTIONS

Guidelines for entering service mode and factory presetting for adjustments.

1. ADJUSTMENT ITEM

2. USER DATA IN SERVICE MODE

Chapter 2. ADJUSTMENT

1. PIF ADJUSTMENT

Procedure for adjusting the PIF (Proportional-Integral-Filter) section of the TV.

2. PURITY ADJUSTMENT

Steps to adjust the CRT purity for correct color display and alignment.

3. CONVERGENCE ADJUSTMENT

Process for aligning the Red, Green, and Blue electron beams for accurate picture geometry.

4. H-VCO, VIF-VCO & S-TRAP fo ADJUSTMENT

Adjustments for Horizontal VCO, VIF VCO, and S-TRAP circuits.

5. SCREEN, WHITE BALANCE, SUB-BRIGHTNESS & SUB-CONTRAST ADJUSTMENT

Adjustments for screen, white balance, sub-brightness, and sub-contrast.

6. HORIZONTAL, VERTICAL, DEFLECTION LOOP and FOCUS ADJUSTMENT

Adjustments for horizontal, vertical, deflection loop, and focus parameters.

7. PAL CHROMA ADJUSTMENT

Procedure for adjusting PAL chroma signals for correct color reproduction.

8. NTSC CHROMA ADJUSTMENT

Procedure for adjusting NTSC chroma signals for correct color reproduction.

9. SECAM CHROMA ADJUSTMENT

Procedure for adjusting SECAM chroma signals for correct color reproduction.

10. PROTECTOR OPERATION CHECKING

Checks for proper operation of the TV's protection circuits.

11. A/V INPUT, OUTPUT CHECKING

Verifies the functionality of Audio/Video input and output terminals.

12. FUNCTION OPERATION CHECKING (VIDEO AND AUDIO)

Tests various video and audio functions controlled by menu keys.

15. SOUND SYSTEM

Checks and sets the sound system for B/G, I, D/K, and M standards.

14. ROOM CORRECTION CHECKING

Checks ROM correction status for monitoring screen settings.

Chapter 4. MEMORY MAP

[1] MEMORY MAP

Chapter 5. TROUBLE SHOOTING FLOWCHART

[1] TROUBLE SHOOTING FLOWCHART

Step-by-step guide to diagnose and resolve common TV issues.

NO SOUND

Troubleshooting steps specifically for audio problems.

NEITHER VERTICAL NOR HORIZONTAL SYNCHRONIZATION

DEFECTIVE VERTICAL AMP. AND VERTICAL LINEARITY

NO VERTICAL SCAN

NO SPECIFIC COLOUR

NO COLOUR "PAL/SECAM"

Chapter 8. BLOCK DIAGRAM

Chapter 10. WAVEFORMS

Chapter 11. SCHEMATIC DIAGRAM

[1] SCHEMATIC DIAGRAM: MAIN UNIT

[2] SCHEMATIC DIAGRAM: CRT UNIT

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