Sharp 20MU11 User Manual

1
20MU11
COLOR TELEVISION
Chassis No. SN-80
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.
» ELECTRICAL SPECIFICATIONS......................................................................................................... 1
» IMPORTANT SERVICE SAFETY PRECAUTION ................................................................................. 2
» LOCATION OF USER'S CONTROL ..................................................................................................... 6
» INSTALLATION AND SERVICE INSTRUCTIONS ................................................................................ 7
» CHASSIS LAYOUT ............................................................................................................................ 12
» BLOCK DIAGRAM ............................................................................................................................. 13
» SCHEMATIC DIAGRAMS .................................................................................................................. 14
» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................ 18
» REPLACEMENT PARTS LIST ........................................................................................................... 23
» PACKING OF THE SET ..................................................................................................................... 35
Page
SHARP CORPORATION
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
CONTENTS
SERVICE MANUAL
POWER INPUT ................................ 120 V AC 60 Hz
POWER RATING .............................................82 W
PICTURE SIZE.......................1,194cm
2 (185sq 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)
ELECTRICAL SPECIFICATIONS
AUDIO POWER
OUTPUT RATING ........... 0.9 W (at 10% distortion)
SPEAKER
SIZE .................................................. 8 cm (Round)
VOICE COIL IMPEDANCE........... 8 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.)
Specifications are subject to change without
prior notice.
MODELS
20MU11

Sharp 20MU11 Specifications

General

Brand	Sharp
Model	20MU11
Category	TV
Language	English

Summary

Safety and Specifications

Electrical Specifications Overview

Details on power input, power rating, picture size, and other technical specifications.

General Safety Guidelines

Covers warnings, high voltage, X-radiation, and picture tube handling safety.

Pre-Return Safety Checks

Procedures for checking lead dress, protective devices, and leakage current.

User Controls, Installation, and Adjustments

Location of User Controls

Identifies front panel and remote control functions for user operation.

Installation and Service Instructions

Guidelines for installation, circuit protection, X-radiation testing, and high voltage checks.

Service Mode and Data Selection

Guides on entering service mode, selecting adjustments, and performing initial settings.

Picture and Geometry Adjustments

Detailed steps for VCO, RF AGC, Screen, White Balance, Sub-Picture, Sub-Tint, Sub-Color adjustments.

Fine-Tuning and Special Adjustments

Procedures for Sub-Brightness, Vertical Size, Horizontal Position, Trap, Sharpness, etc.

Technical Diagrams

Chassis Layout

Diagrams illustrating the chassis layout for component identification.

System Block Diagram

System block diagram showing the overall signal flow and component interaction.

Schematic Diagrams

Notes on schematic diagrams, measurement conditions, and waveform examples.

Printed Wiring Board Assemblies

Wiring and chip side views for PWB-A (Main Unit) and PWB-B (CRT Unit).

Parts List and Packing

Component Parts Identification

List of replacement parts including picture tube, ICs, transistors, and passive components.

Set Packing Information

Diagram and description of packing materials and methods for the television set.