Sharp 20R-S100S User Manual

1
20R-S100S
COLOR TELEVISION
Chassis No. SN-010
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.
S21P120R-S100
» ELECTRICAL SPECIFICATIONS .........................................................................................................1
» IMPORTANT SERVICE SAFETY PRECAUTION .................................................................................2
» LOCATION OF USER'S CONTROL .....................................................................................................4
» INSTALLATION AND SERVICE INSTRUCTIONS ................................................................................5
» CHASSIS LAYOUT ............................................................................................................................. 11
» BLOCK DIAGRAM ..............................................................................................................................12
» SCHEMATIC DIAGRAMS ...................................................................................................................13
» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................19
» REPLACEMENT PARTS LIST ............................................................................................................22
» PACKING OF THE SET ......................................................................................................................29
Page
SHARP CORPORATION
CONTENTS
SERVICE MANUAL
POWER INPUT .................................................... AC 120 V, 60 Hz
POWER RATING ................................................................... 74 W
PICTURE SIZE ........................................... 1,240cm
2
(192sq inch)
CONVERGENCE ............................................................. Magnetic
SWEEP DEFLECTION .................................................... Magnetic
FOCUS ............................................... Hi-Bi-Potential Electrostatic
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 ..................... 1.5W + 1.5W (at 10% distortion
and Dual CH Operate)
ELECTRICAL SPECIFICATIONS
SPEAKER
SIZE ...................................................................... 8 cm (Round)
VOICE COIL IMPEDANCE ............................ 32 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.)
MODEL
20R-S100S
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
Specifications are subject to change without
prior notice.
MTS STEREO

Sharp 20R-S100S Specifications

General

Screen Size	20 inches
Aspect Ratio	4:3
Refresh Rate	60 Hz
HDMI Ports	0
USB Ports	0

Summary

Electrical Specifications

Important Service Safety Precautions

Servicing of High Voltage System and Picture Tube

Procedures for servicing high voltage systems and picture tubes safely.

X-Radiation and High Voltage Limits

Information on X-radiation and high voltage limits during servicing.

Before Returning the Receiver (Fire & Shock Hazard)

Safety checks to perform before returning the receiver to the user.

Safety Notice

Importance of using specified parts for safety and avoiding hazards.

Location of User's Control

Front Panel

Controls and indicators on the TV's front panel.

Basic Remote Control Functions

Explanation of basic functions of the remote control.

Installation and Service Instructions

Circuit Protection

Details on the receiver's circuit protection, including fuse.

X-Radiation Protector Circuit Test

Procedure for testing the X-radiation protector circuit.

High Voltage Check

Instructions for checking high voltage levels for safety.

Fix Value

Def

Signal

Feature

Service Adjustment

RF AGC Adjustment

Procedure for adjusting RF AGC for optimal signal reception.

Video Level (TV Det Video Level) Adjustment

Steps to adjust video level for correct contrast.

Screen Adjustment

Procedure for adjusting screen brightness and raster.

White Balance Adjustment

Steps to adjust white balance for accurate color.

Sub-Picture Adjustment

Adjusting contrast for optimal picture quality.

Sub-Tint Adjustment

Adjusting tint control for natural skin tones.

Sub-Color Adjustment

Adjusting color saturation for accurate color reproduction.

Sub-Brightness Adjustment

Adjusting brightness for optimal display visibility.

Vertical-Size, V-Linearity and V-S Correction Adjustments

Horizontal Position Adjustment

Procedure to center the picture horizontally.

Vertical-Phase Adjustment

Adjusting vertical position for optimal display.

Caption Position Adjustment (Horizontal)

Adjusting horizontal caption box position.

MTS Adjustment

MTS Level Adjustment

Adjusting MTS audio level for proper sound.

MTS VCO Adjustment

Adjusting MTS VCO for frequency stability.

Filter Adjustment

Adjusting filter for optimal stereo signal.

Separation Adjustment

Adjusting stereo separation for sound quality.

Chassis Layout

Block Diagram

Description of Schematic Diagram

Waveforms

Schematic Diagram: Main Unit

Schematic Diagram: MTS Module Unit

Schematic Diagram: CRT Unit

Printed Wiring Board Assemblies

PWB-A: Main Unit (Wiring Side)

PWB-A: Main Unit (Chip Parts Side)

Parts List

Parts Replacement

Importance of using specified parts for safety.

How to Order Replacement Parts

Information needed to order replacement parts correctly.

Picture Tube

Part numbers and descriptions for picture tube components.

Printed Wiring Board Assemblies (Not Replacement Item)

Identifies printed wiring board assemblies.

PWB-A: Main Unit (Continued)

PWB-A: Main Unit (Continued)

PWB-A: Main Unit (Continued)

PWB-A: Main Unit (Continued)

Switches

Part numbers and descriptions for various switches.

Miscellaneous Parts

Part numbers and descriptions for miscellaneous items.

PWB-E: MTS Module Unit

Miscellaneous Parts

Cabinet Parts

Part numbers and descriptions for cabinet components.

Supplied Accessories

List of supplied accessories with the unit.

Packing of the Set