Sharp W21FL User Manual

SHARP CORPORATION
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
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.
COLOR TELEVISION
Chassis No. GA-4
Page
» ELECTRICAL SPECIFICATIONS .........................................................................................................1
» IMPORTANT SERVICE SAFETY PRECAUTION .................................................................................2
» LOCATION OF USER'S CONTROL .....................................................................................................4
» INSTALLATION AND SERVICE INSTRUCTIONS ................................................................................5
» SERVICE MODE...................................................................................................................................6
» ADJUSTMENT METHOD .....................................................................................................................7
» CHASSIS LAYOUT .............................................................................................................................14
» BLOCK DIAGRAM ..............................................................................................................................15
» DESCRIPTION OF SCHEMATIC DIAGRAM......................................................................................19
» SCHEMATIC DIAGRAMS......................................................................................................................20
» PRINTED WIRING BOARD ASSEMBLIES.........................................................................................24
» REPLACEMENT PARTS LIST.............................................................................................................28
» PACKING OF THE SET ......................................................................................................................34
CONTENTS
SPEAKER
SIZE ...................................................................5 x 12 cm, 2pcs
VOICE COIL IMPEDANCE ............................ 16 ohm at 400 Hz
ANTENNA INPUT IMPEDANCE
VHF/UHF .....................................................75 ohm Unbalanced
TUNING RANGES
VHF-Channels...............................................................2 thru 13
UHF-Channels ............................................................14 thru 69
CATV Channels ...........................................................1 thru 125
(EIA, Channel Plan U.S.A.)
POWER INPUT ............................................... AC 110-220V, 60 Hz
POWER RATING .................................................................... 90W
PICTURE SIZE .......................................... 1,239 cm
2
(192sq inch)
CONVERGENCE ............................................................. Magnetic
SWEEP DEFLECTION .................................................... Magnetic
FOCUS ................................................................................. Uni-Bi
INTERMEDIATE FREQUENCIES
Picture IF Carrier Frequency ..................................... 45.75 MHz
Sound IF Carrier Frequency...................................... 41.25 MHz
Color Sub-Carrier Frequency .................................... 42.17 MHz
(Nominal)
AUDIO POWER
OUTPUT RATING ........................................4 W(RMS) x 2pcs
Specifications are subject to change without
prior notice.
ELECTRICAL SPECIFICATIONS
MODELS
SERVICE MANUAL
W21FL

Sharp W21FL Specifications

General

Brand	Sharp
Model	W21FL
Category	TV
Language	English

Summary

Electrical Specifications

Service Safety Precautions

General Safety Warnings

Essential safety rules for technicians.

High Voltage & X-Ray Safety

Precautions for high voltage and X-ray radiation.

Receiver Return Safety Checks

Checks before returning the unit to the customer.

Safety of Replacement Parts

Emphasizes using identical replacement parts for safety.

User Control Locations

Front Panel Controls

Identifies user controls on the TV's front panel.

Remote Control Functions

Explains the operation of remote control buttons.

Installation and Service Instructions

Circuit Protection and HV Check

Details circuit protection, X-ray test, and HV check procedures.

Service Mode Operations

Service Mode Overview and Modes

How to enter, exit, and switch between service modes.

Adjustment and Setting Procedures

First Stage Adjustment Data

Table of first stage adjustment items, ranges, and defaults.

Self-Adjustment Procedures

Detailed steps for key self-adjustments like H-VCO, RF-AGC.

Second Stage Setting Items

Table of second stage setting items and their functions.

Third Stage Option Mode Items

Table of third stage option mode items and settings.

Diagrams and Schematics

Chassis Layout Identification

Identifies major PWB locations on the chassis.

Block Diagrams

High-level diagrams of key circuit blocks.

Schematic Diagram Descriptions

General notes on schematics and waveform measurement.

Detailed Schematic Diagrams

Schematics for CRT, Main, and MTS units.

Printed Wiring Board Assemblies

PWB-A Main Unit Layouts

Layouts for PWB-A (Wiring and Chip Sides).

PWB-B CRT & PWB-E MTS Layouts

Layouts for PWB-B CRT and PWB-E MTS units.

Parts List and Replacement

Parts Replacement Guidelines

Instructions and warnings for replacing parts.

Component Lists

Lists parts for PWBs, transistors, diodes, capacitors, resistors.

Miscellaneous and Packing Parts

Lists miscellaneous, cabinet, and packing parts.

Packing of the Set