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Sharp 27U-S50 User Manual

Sharp 27U-S50
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1
27U-S50
COLOR TELEVISION
Chassis No. C/D-BM
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.
S12F527U-S50/
» 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
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
MODEL
POWER INPUT .................................................... 120 V AC 60 Hz
POWER RATING ..................................................................105 W
PICTURE SIZE ........................................... 2,187cm
2
(339sq 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.)
Specifications are subject to change without
prior notice.
27U-S50
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Sharp 27U-S50 Specifications

General IconGeneral
Screen Size27 inches
HDRNo
Smart TVNo
Refresh Rate60 Hz
InputsComposite

Summary

Electrical Specifications

Service Safety Precautions

General Service Warnings

General warnings for service work, including no modification, disconnect power, and heat sink hazards.

High Voltage and Picture Tube Servicing Safety

Safety procedures for servicing high voltage systems and picture tubes, including static discharge.

X-Radiation and High Voltage Limits

Precautions regarding X-radiation and maintaining high voltage within specified limits.

Pre-Return Safety Checks

Component Safety Notice

Notice on safety-related characteristics of electrical and mechanical parts and using correct replacement parts.

User Control Locations

Front Panel Controls

Description of Power and Menu controls on the front panel of the television.

Remote Control Functions

Details on basic remote control operations like Power, Input, Channel, Volume, Mute, and Display.

Installation and Service Instructions

Circuit Protection Details

Information on the receiver's fuse (F701) for circuit protection.

X-Radiation Protector Circuit Test

Procedure to test the X-radiation protection circuit after servicing.

High Voltage Check Procedure

Procedure for checking and verifying the high voltage is within safe design limits.

Service Adjustments

Service Mode Operation

Instructions for entering, exiting, and navigating the television's service mode.

Adjustment Categories Overview

Overview of adjustment categories: FIX VALUE, DEF, SIGNAL, and FEATURE.

Specific Adjustment Procedures

Detailed procedures for various adjustments including +B, Video Level, RF AGC, Screen, White Balance, etc.

MTS Adjustment Procedures

Procedures for adjusting MTS level, VCO, Filter, and Separation.

Fix Value Adjustments

DEF Adjustments

Signal Adjustments

Feature Adjustments

Chassis Layout

Block Diagram

Schematic Diagram Description

Schematic Diagram Notes

Notes regarding resistance units, resistor wattage, capacitor units, tolerance, and isolated ground.

Voltage Measurement Conditions

Conditions for measuring DC voltages using DVM, including line voltage and signal type.

Waveform Measurement Conditions

Conditions for measuring waveforms, including signal type, tint setting, and waveform check points.

Schematic Diagram: Main Unit Part 1

Schematic Diagram: Main Unit Part 2

Schematic Diagram: CRT Unit

Printed Wiring Board Assemblies

Parts List

Parts Replacement Guidelines

Guidelines for replacing parts, emphasizing safety characteristics and using identical substitutes.

Ordering Replacement Parts

Information on how to order replacement parts by providing model number, part number, and description.

Picture Tube Parts

List of parts related to the picture tube.

Main Unit Parts (PWB-A)

List of components for the Main Unit (PWB-A), including transistors, diodes, and packaged circuits.

Diode Components

List of diode part numbers, descriptions, and codes.

Packaged Circuits

List of packaged circuit part numbers and descriptions.

Filters and Coils

List of filters, coils, and their associated part numbers and codes.

Transformers

List of transformer part numbers and descriptions.

Capacitor Components

List of capacitor part numbers, types, voltage, capacitance, and codes.

Resistor Components

List of resistor part numbers, types, resistance, wattage, and codes.

Transistor Components

List of transistor part numbers, descriptions, and codes.

Switch Components

List of switch part numbers and their functions (Power, Volume, Channel, Menu).

Miscellaneous Parts

List of miscellaneous parts like relays, fuses, holders, jacks, and plugs.

CRT Unit Parts (PWB-B)

List of parts for the CRT Unit (PWB-B), including transistors, diodes, capacitors, and resistors.

CRT Unit Transistors

List of transistors used in the CRT Unit.

CRT Unit Diodes

List of diodes used in the CRT Unit.

CRT Unit Capacitors

List of capacitors used in the CRT Unit.

CRT Unit Resistors

List of resistors used in the CRT Unit.

Main Unit Switches

List of switches for the Main Unit, including power, volume, and channel controls.

Main Unit Miscellaneous Parts

List of miscellaneous parts for the Main Unit, such as AC cords, holders, and screws.

Cabinet Parts

List of cabinet parts, including front and rear cabinets, and buttons.

Cabinet Parts Location Diagram

Diagram showing the location of various cabinet parts.

Main Unit Parts (PWB-A) Continued 6

Final listing of Main Unit parts, covering switches and miscellaneous items.

CRT Unit Parts (PWB-B) Continued

Continuation of CRT Unit parts list, including transistors, diodes, capacitors, and resistors.

CRT Unit Transistors (Continued)

Continued list of transistors for the CRT Unit.

CRT Unit Diodes (Continued)

Continued list of diodes for the CRT Unit.

CRT Unit Capacitors (Continued)

Continued list of capacitors for the CRT Unit.

CRT Unit Resistors (Continued)

Continued list of resistors for the CRT Unit.

CRT Unit Miscellaneous Parts

List of miscellaneous parts for the CRT Unit, including plugs and screws.

Packing of the Set

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