Sharp 21C-FX1C User Manual

1
21C-FX1(C)/(G)
21C-FX5/FX8
SHARP CORPORATION
SERVICE MANUAL
21C-FX1(C)/(G)
21C-FX5/FX8
MODELS
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.
FEATURE
Ë
Multi 21 Systems
Ë
Full Auto Channel Preset and Auto Channel Skip
Ë
100-CH Program Memory
Ë
CATV(Hyper Band) Ready <Used Frequency Synthesizer
Tuner>
Ë
Black Stretch Circuit
Ë
On Timer/Sleep Timer/Reminder Timer
Ë
Blue Back Noise Mute
Ë
Front AV-In & Rear AV-IN/OUT Terminals
Ë
Colour Comb Filter (NTSC Only)
Ë
High Contrast Picture
Ë
Hotel Mode
Ë
Multi Longuages OSD(Eng/Chi/Fre/Malay/Arab/Russian)
Ë
NICAM I, B/G, D/K & A2 STEREO B/G(21C-FX5/FX8)
Ë
TELETEXT (One Page)-English / German / French /
Spanish / Italian / Swedish (21C-FX5)
Ë
White Temperature Adjustment
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.
» SPECIFICATIONS ........................................... 2
» IMPORTANT SERVICE NOTES...................... 2
» ADJUSTMENT PRECAUTIONS ..................... 3
» HOTEL MODE APPLICATION ...................... 13
» MEMORY MAP..............................................14
» TROUBLE SHOOTING TABLE ..................... 26
» SOLID STATE DEVICE BASE DIAGRAM ..... 28
» CHASSIS LAYOUT........................................ 29
» WAVEFORMS ............................................... 31
» DESCRIPTION OF SCHEMATIC DIAGRAM .. 32
» SCHEMATIC DIAGRAM
■ CRT UNIT................................................. 33
■ MAIN UNIT ............................................... 34
■ NICAM Unit .............................................. 40
» BLOCK DIAGRAM ........................................ 42
» PRINTED WIRING BOARD ASSEMBLIES ... 47
» REPLACEMENT PARTS LIST
■ ELECTRICAL PARTS............................... 52
■ MISCELLANEOUS PARTS ...................... 58
■ SUPPLIED ACCESSORIES ..................... 58
■ PACKING PARTS ..................................... 58
■ CABINET PARTS ..................................... 58
» PACKING OF THE SET ................................ 59
Page Page
CONTENTS
COLOUR TELEVISION
Chassis No. UAF-C
STEREO
PUSH OPEN
S32G721C-FX5/

Sharp 21C-FX1C Specifications

General

Brand	Sharp
Model	21C-FX1C
Category	TV
Language	English

Summary

Service Safety Warnings

Television Specifications

Key Service Guidelines

High Voltage and Picture Tube Safety

Procedures for safely servicing high voltage systems and handling picture tubes.

X-Ray Radiation Precautions

Guidelines to minimize and control potential X-ray radiation during servicing.

Final Safety Checks Before Return

Essential safety checks to perform on the receiver before returning it to the user.

Service Adjustment Precautions

Service Mode Operation

Detailed steps on how to enter and operate the television's service mode.

Troubleshooting Error Indicators

How to interpret LED flashing patterns for diagnosing faults.

Service Mode User Data Management

Initial Channel Tuning Settings

Factory Shipping Settings

Model-Specific Factory Settings

Default data variations based on the television model and destination.

IF (Intermediate Frequency) Adjustment

SIF (Sound Intermediate Frequency) Adjustment

CRT Purity Adjustment Procedures

CRT Convergence Adjustment

CRT Cut-off and Picture Adjustments

Deflection Loop Adjustments

CRT Focus Adjustment

NTSC Chroma Adjustment

PAL Chroma Adjustment

Protection Circuit Checks

Audio/Video Input-Output Checks

Video and Audio Function Checks

Hotel Mode Configuration

EEPROM Memory Map Reference

Troubleshooting Guide: No Raster

Troubleshooting: No Raster

Diagnostic steps for identifying and resolving issues when the screen has no raster.

Troubleshooting: No Picture or Sound

Diagnostic steps for issues where there is no picture or sound output.

Troubleshooting: No Sound

Diagnostic steps for identifying and resolving issues with no sound.

Troubleshooting Guide: Sync and Colour Issues

Troubleshooting: Sync Problems

Steps to diagnose and fix issues with vertical and horizontal synchronization.

Troubleshooting: Vertical Amp & Linearity

Steps to diagnose and fix vertical amplifier and linearity defects.

Troubleshooting: No Vertical Scan

Steps to diagnose and fix issues where there is no vertical scan.

Troubleshooting: No Specific Colour

Diagnosing issues related to specific color reproduction problems.

Troubleshooting: Color System Issues

Steps to diagnose and fix color issues related to PAL, SECAM, and NTSC systems.

Solid State Device Pinout Diagrams

Signal Waveform Examples

CRT Unit Schematic Diagram

Schematic Diagram: NICAM Unit

Main Block Diagram - Part 1

Main Block Diagram - Part 2

CRT and NICAM Block Diagrams

Replacement Parts List

Parts Replacement Guidelines

Guidelines and warnings regarding the replacement of specific parts.

Ordering Replacement Parts

Instructions on how to correctly order replacement parts.