Sharp 29L-FG1L - User Manual

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CHAPTER 1. SPECIFICATIONS

[1] SPECIFICATIONS .................................................

1-1

CHAPTER 2. IMPORTANT SERVICE NOTES

[1] IMPORTANT SERVICE NOTE ..............................

2-1

CHAPTER 3. ADJUSTMENT PRECAUTIONS

[1] ADJUSTMENT PRECAUTIONS ...........................

3-1

[2] ADJUSTMENT ......................................................

3-15

CHAPTER 4. TROUBLE SHOOTING FLOWCHART

[1] TROUBLE SHOOTING FLOWCHART..................

4-1

CHAPTER 5. SOLID STATE DEVICE BASE DIAGRAM

[1] SOLID STATE DEVICE BASE DIAGRAM .............

5-1

CHAPTER 6. CHASSIS LAYOUT

[1] CHASSIS LAYOUT................................................

6-1

CHAPTER 7. DESCRIPTION OF SCHEMATIC DIAGRAM

[1] DESCRIPTION OF SCHEMATIC DIAGRAM ........

7-1

CHAPTER 8. BLOCK DIAGRAM

[1] BLOCK DIAGRAM : MAIN UNIT ...........................

8-1

CHAPTER 9. WAVEFORM

[1] WAVEFORM..........................................................

9-1

CHAPTER 10. SCHEMATIC DIAGRAM

[1] SCHEMATIC DIAGRAM : CRT UNIT ....................

10-1

[2] SCHEMATIC DIAGRAM : MAIN UNIT ..................

10-2

CHAPTER 11. PRINTED WIRING BOARD ASSEMBLIES

[1] PWB-A : MAIN UNIT .............................................

11-1

[2] PWB-B : CRT UNIT...............................................

11-5

 NTSC System

 125-CH Program Memory

 AV Mode (Standard/Dynamic/Soft)



CATV Hyper Band Ready

 4 Line Digital Comb Filter



Blue/Black Stretch Circuit

 Picture Noise Reduction

 White Temp. Select



Aperture Control

 Gamma Correction

 Dual Language OSD (English/Spanish)

 Demo

 Selectable Audio Output - FAO/VAO

 Close Caption

SERVICE MANUAL

29L-FG1L

COLOUR TELEVISION

Chassis No. GB-5

MODEL

CONTENTS

WARNING

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.

29L-FG1L

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 indentical to those specified should be used.

 On/Off/Reminder Timer (with beep sound)

 Rear AV-IN 1, AV Output (Monitor Out), Headphone

and Front AV-IN 2

 Power Save

 AFT



Component Input Terminal (share with AV1)

 MTS Stereo Decoder

 Child Lock



Graphic Equalizer

 Sound Mode (Music/Movie/News/Custom)

 Hotel Mode



EZ Setup

 16 : 9 Mode

S677529LFG1L

Parts Guide

1st Edition

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This document is a service manual for the SHARP 29L-FG1L Colour Television, Chassis No. GB-5.

Function Description

The SHARP 29L-FG1L is a colour television receiver designed for various broadcast standards and input sources. It supports NTSC, PAL, and SECAM systems, making it suitable for use in different regions. The television features a 29-inch screen and offers a range of functionalities for viewing and audio playback. It includes a 125-channel program memory, a 2-mode standard/dynamic/soft picture mode, and CATV hyper band ready. Audio features include a 4-line digital comb filter, black stretch circuit, picture noise reduction, and white temp. select. It also offers an aperture control, gamma correction, and dual language OSD (English/Spanish). The television is equipped with a demo mode and selectable audio output (FAO/VAO), along with a close caption feature.

For connectivity, the television provides multiple input/output options. It has rear AV-IN 1 and AV-IN 2, an AV output (monitor out), and a headphone jack. It also includes front AV-IN 2 for convenient access. The television supports a power save mode and an AFT (Automatic Fine Tuning) function. It features a transparent input terminal (share with AV1) and MTS stereo decoder. Additional features include child lock, graphic equalizer, sound mode (music/movie/news/custom), hotel mode, and an EZ setup for easy configuration. The television can operate in 16:9 mode.

Important Technical Specifications

Convergence: Self Convergence System Focus: Bi-Potential, Uni-Potential Electrostatic Sweep Deflection: Magnetic

Intermediate Frequencies:

Picture IF Carrier: 38.9MHz
Sound IF Carrier: 34.4MHz
Colour Sub-Carrier: 35.32MHz

Power Input: 110 ~ 220V AC 50/60 Hz Power Consumption: 138W

Audio Power Output Rating: 7.5W x 2 (at Max.)

Speaker: 8 cm round x 2

Aerial Input Impedance:

VHF/UHF: 75 ohms Unbalanced

Receiving Channels:

VHF: 2 thru 13
UHF: 14 thru 69
CATV: 1 thru 125
Digital Terrestrial Broadcast (VHF/UHF): 2 thru 69 (EIA, Channel Plan U.S.A.)

Receiving Frequency: 55.25 MHz thru 801.25 MHz

Dimensions:

Width: 810mm
Height: 615mm
Depth: 516.5mm
Weight (approx.): 41.0 kg

Cabinet Material: All Plastics

Usage Features

The television offers a user-friendly interface with an On-Screen Display (OSD) available in English and Spanish. The EZ setup feature simplifies initial configuration. Users can select various picture modes (standard, dynamic, soft) and sound modes (music, movie, news, custom) to tailor their viewing experience. The graphic equalizer allows for further audio customization. The child lock feature provides parental control over content access. Hotel mode is available for use in hospitality environments. The television supports both 4:3 and 16:9 aspect ratios.

Adjustment modes are accessible through a service menu, allowing for fine-tuning of geometric, white point, and picture sub-adjustment settings. These include V-slope, H-par, E/W-trap, and various colour cut-off and drive adjustments. The option mode menu provides settings for features like NTSC system, PIP frequency, sound modes, hotel mode, childlock, and various input/output configurations.

Maintenance Features

The service manual emphasizes the importance of maintenance and repair by qualified service personnel only. It provides critical safety information, including warnings about high voltage and X-ray radiation. Specific instructions are given for handling the picture tube and related components to prevent electric shock and X-ray exposure.

Important Service Notes:

Maintenance and repair should be done by qualified service personnel only.
Service of High Voltage System and Picture Tube: When servicing, remove static charge from the picture tube, disconnect the AC line cord, and replace the picture tube with the same type number. Handle the picture tube only when wearing shatterproof goggles and after discharging the high voltage completely.
X-Ray Radiation: This receiver is designed to keep X-ray radiation to an absolute minimum. Precautions should be observed when repairing circuits, especially regarding high voltage settings. Do not substitute a picture tube with unauthorized types.
Before Returning the Receiver: Inspect all lead dress, ensure non-metal control knobs are not lodged, and check for proper insulation and component covers.

Adjustment Precautions:

The model's setting is adjusted in two different ways: through the I2C bus control and the conventional analog manner.
Setting the service mode by the microprocessor involves pressing and holding specific key combinations on the remote controller (e.g., "VOL DOWN" & "CH UP") to enter the SERVICE MODE.
Factory presetting involves entering the SERVICE MODE and selecting "INIT EEPROM" to reset initial values.
Caution: Once the chassis has been assembled together and in ready condition, make sure it goes through initialization process.

The manual includes detailed troubleshooting flowcharts for common issues such as "NO RASTER," "NO LED LIGHT," "NO NORMAL SOUND," "NO PICTURE," and "NO SPECIFIC COLOUR." These flowcharts guide technicians through a systematic process of diagnosis and repair, checking components like the CRT connector, power circuit, sound output signal, and various ICs.

Detailed adjustment procedures are provided for RF AGC, purity, uniformity, convergence, focus, cut-off, sub-brightness, sub-contrast, horizontal/vertical deflection, NTSC chroma, and sound output. These procedures involve using specific test patterns, oscilloscopes, and multimeters to ensure proper calibration and performance of the television.

The manual also includes solid state device base diagrams, chassis layouts, block diagrams, schematic diagrams, and printed wiring board assemblies to aid in component identification and repair. A comprehensive parts guide lists all components with their part numbers, price rank, and descriptions.