Sharp 14A2-RU User Manual

1
14A1-RU
14A2-RU
1-21-1
SERVICE MANUAL
(14A1-RU) (14A2-RU)
COLOUR TELEVISION
Chassis No. UA-1
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.
14A1-RU
14A2-RU
MODELS
SHARP CORPORATION
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.
CONTENTS
» SPECIFICATIONS .............................. 2
» IMPORTANT SERVICE NOTES ......... 2
» ADJUSTMENT PRECAUTIONS ......... 3
» TROUBLE SHOOTING TABLE ......... 19
» HOTEL MODE APPLICATION .......... 21
» SOLID STATE DEVICE BASE
DIAGRAM ......................................... 22
» WAVEFORMS ................................... 23
» CHASSIS LAYOUT ........................... 24
» DESCRIPTION OF SCHEMATIC DIA-
GRAM ............................................... 26
» SCHEMATIC DIAGRAM
■ CRT Unit ....................................... 27
■ MAIN Unit ..................................... 28
» BLOCK DIAGRAM ............................ 32
» PRINTED WIRING BOARD ASSEM-
BLIES ................................................ 37
» REPLACEMENT PARTS LIST
■ ELECTRICAL PARTS ................... 42
■ MISCELLANEOUS PARTS........... 46
■ SUPPLIED ACCESSORIES ......... 46
■ PACKING PARTS ......................... 46
■ CABINET PARTS.......................... 46
Page Page
FEATURE
Ë
Multi 18 Systems
Ë
Full Auto Channel Preset and Auto Channel Skip
Ë
100-CH Program Memory
Ë
High Contrast Picture
Ë
Black Stretch Circuit
Ë
CATV (Hyper Band) Ready < Used Frequency Synthesizer
Tuner>
Ë
AVL (Sound Keeper) Function
Ë
Hotel Mode
Ë
On Timer / Sleep Timer / Reminder Timer
Ë
Colour Comb Filter Function (NTSC only)
Ë
Blue Back Noise Mute
Ë
Rear AV-In/Out Terminals and Front AV-In
Ë
English and Russian OSD
SX0M114A1-RU/

Sharp 14A2-RU Specifications

General

Brand	Sharp
Model	14A2-RU
Category	TV
Language	English

Summary

TV Specifications

Important Service Notes

Critical safety and handling instructions for service personnel.

X-Ray Radiation Precautions

Guidelines to prevent hazardous X-ray radiation during servicing.

Service Mode and Adjustment Procedures

Entering Service Mode

Steps to enter and navigate the service mode for adjustments.

Factory Presetting

Procedure for initial data presetting and EEPROM handling.

Service Mode Adjustment Flow

Flowchart detailing various adjustment modes within the service menu.

Troubleshooting Guide

No Raster Troubleshooting

Diagnosing and resolving problems with no picture display.

No Picture or Sound Troubleshooting

Troubleshooting steps for absence of video and audio signals.

Vertical Sync and Linearity Issues

Addressing problems with vertical scan, linearity, and synchronization.

Color Reproduction and Sync Issues

Diagnosing issues related to color reproduction and synchronization.

Hotel Mode Feature Usage

Hotel Mode Enable/Disable

Instructions for activating and deactivating the hotel mode feature.

Semiconductor Component Diagrams

Top View Component Diagrams

Base diagrams for semiconductor components viewed from the top.

Side View Component Diagrams

Base diagrams for semiconductor components viewed from the side.

Signal Waveform References

Video Signal Waveform Examples

Visual representations of various video signal test patterns.

Audio Signal Waveform Examples

Visual representations of audio signal test patterns.

Chassis Component Layouts

14A1-RU Chassis Layout

Diagram showing component placement on the 14A1-RU chassis.

14A2-RU Chassis Layout

Diagram showing component placement on the 14A2-RU chassis.

Schematic Diagram Explanation

Safety and Service Precautions

Important safety notes and service precautions for using schematics.

Measurement Conditions

Guidelines for voltage and waveform measurements.

Circuit Schematics and Diagrams

CRT Unit Schematic Diagram

Detailed circuit diagram for the Cathode Ray Tube unit.

Main Unit Schematic (14A1-RU)

Circuit diagram for the main unit of the 14A1-RU model.

Main Unit Schematic (14A2-RU)

Circuit diagram for the main unit of the 14A2-RU model.

Block Diagram - Main Unit

Functional block diagram of the TV's main unit.

Block Diagram - CRT Unit

Functional block diagram of the TV's CRT unit.

Printed Wiring Board Assemblies

Wiring diagrams for the CRT and Main units.

Parts List and Replacement

Transistors and Diodes List

List of transistors and diodes with part numbers and descriptions.

Capacitors and Resistors List

List of capacitors and resistors with part numbers and values.

Coils, Switches, and Miscellaneous Parts

List of coils, switches, accessories, packing, and cabinet parts.