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Sharp 27R-S50 User Manual

Sharp 27R-S50
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1
27R-S50
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.
S21O627R-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 ........................................................................................18
» REPLACEMENT PARTS LIST ............................................................................................................23
» PACKING OF THE SET ......................................................................................................................31
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.
27R-S50
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Sharp 27R-S50 Specifications

General IconGeneral
BrandSharp
Model27R-S50
CategoryTV
LanguageEnglish

Summary

ELECTRICAL SPECIFICATIONS

IMPORTANT SERVICE SAFETY PRECAUTION

SERVICING OF HIGH VOLTAGE SYSTEM AND PICTURE TUBE

Safety precautions for servicing the high voltage system and picture tube.

X-RADIATION AND HIGH VOLTAGE LIMITS

Guidelines on X-radiation and high voltage limits during service.

BEFORE RETURNING THE RECEIVER (Fire & Shock Hazard)

Safety checks required before returning the receiver to the customer.

SAFETY NOTICE

Notice regarding safety-related characteristics of replacement parts.

LOCATION OF USER'S CONTROL

Front Panel

Describes the controls located on the front panel of the television.

Basic Remote Control Functions

Explains the functions of the buttons on the remote control.

INSTALLATION AND SERVICE INSTRUCTIONS

CIRCUIT PROTECTION

Details the circuit protection mechanisms used in the receiver.

X-RADIATION PROTECTOR CIRCUIT TEST

Procedure to test the X-radiation protector circuit for proper operation.

HIGH VOLTAGE CHECK

Steps to check and verify the high voltage levels for safety.

SERVICE ADJUSTMENT

Service mode

Instructions on how to enter and exit the TV's service mode.

Service number selection

Explains how to navigate and select adjustment categories within service mode.

FIX VALUE

Lists adjustment ranges and initial values for the FIX VALUE category.

DEF

Lists adjustment ranges and initial values for the DEF category.

SIGNAL

Lists adjustment ranges and initial values for the SIGNAL category.

FEATURE

Lists adjustment ranges and initial values for the FEATURE category.

Part Replacement Adjustments

Details adjustments required after replacing specific parts like IC201, IC2102, and CRT.

+B Adjustment

Procedure for adjusting the +B voltage in the receiver.

Video Level Adjustment

Steps to adjust the video signal level for optimal contrast.

RF AGC Adjustment

Procedure for adjusting the RF Automatic Gain Control.

Screen Adjustment

Steps to adjust the CRT screen for optimal display.

White Balance Adjustment

Procedure to adjust the white balance for accurate color reproduction.

Sub-Picture Adjustment

How to adjust sub-picture controls for normal contrast.

Sub-Tint Adjustment

Procedure to adjust the tint control for natural skin tones.

Sub-Color Adjustment

Steps to adjust the color level for proper color reproduction.

Sub-Brightness Adjustment

Procedure to adjust the brightness control for optimal viewing.

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

Adjusting vertical size, linearity, and V-S correction for picture geometry.

Horizontal Position Adjustment

Procedure to adjust the horizontal position of the picture.

Vertical-Phase Adjustment

Steps to adjust the vertical phase for proper vertical display.

Caption Position Adjustment (Horizontal)

Procedure to adjust the horizontal position of closed captions.

MTS ADJUSTMENT

Adjustments related to the MTS (Multichannel Television Sound) system.

MTS Level Adjustment

Adjusting the audio level for the MTS system.

MTS VCO Adjustment

Procedure to adjust the Voltage Controlled Oscillator for MTS.

Filter Adjustment

Adjusting the filter for optimal stereo reception.

Separation Adjustment

Adjusting stereo separation for MTS audio.

CHASSIS LAYOUT

BLOCK DIAGRAM

SCHEMATIC DIAGRAMS

DESCRIPTION OF SCHEMATIC DIAGRAM

Explains notes, voltage, and waveform measurement conditions for schematics.

VOLTAGE MEASUREMENT CONDITIONS

Conditions for measuring DC voltages in the circuit.

WAVEFORM MEASUREMENT CONDITIONS

Conditions for capturing and measuring waveforms.

WAVEFORMS

Displays waveform photographs for various test points.

MAIN-1 Unit Schematic

Schematic diagram for the MAIN-1 Unit of the receiver.

MAIN-2 Unit Schematic

Schematic diagram for the MAIN-2 Unit of the receiver.

CRT and FRONT A/V Unit Schematic

Schematic diagram for the CRT and Front A/V units.

PRINTED WIRING BOARD ASSEMBLIES

PWB-A: MAIN Unit (Wiring Side)

Wiring side layout of Printed Wiring Board A (Main Unit).

PWB-A: MAIN Unit (Chip Parts Side)

Chip parts side layout of Printed Wiring Board A (Main Unit).

PWB-B: CRT Unit (Wiring Side)

Wiring side layout of Printed Wiring Board B (CRT Unit).

PWB-H: FRONT A/V Unit (Wiring Side)

Wiring side layout of Printed Wiring Board H (Front A/V Unit).

REPLACEMENT PARTS LIST

PARTS REPLACEMENT

Notes and warnings regarding the replacement of parts.

HOW TO ORDER REPLACEMENT PARTS

Instructions for ordering replacement parts for the unit.

PICTURE TUBE

List of parts related to the picture tube.

TRANSISTORS

List of transistors used in the unit.

DIODES

List of diodes used in the unit.

PACKAGED CIRCUITS

List of packaged circuits used in the unit.

FILTERS AND COILS

List of filters and coils used in the unit.

TRANSFORMERS

List of transformers used in the unit.

CAPACITORS

List of capacitors used in the unit.

RESISTORS

List of resistors used in the unit.

SWITCHES

List of switches used in the unit.

MISCELLANEOUS PARTS

List of miscellaneous parts used in the unit.

CRT UNIT TRANSISTORS

List of transistors for PWB-B (CRT Unit).

CRT UNIT DIODES

List of diodes for PWB-B (CRT Unit).

CRT UNIT CAPACITORS

List of capacitors for PWB-B (CRT Unit).

CRT UNIT RESISTORS

List of resistors for PWB-B (CRT Unit).

CRT UNIT MISCELLANEOUS PARTS

List of miscellaneous parts for PWB-B (CRT Unit).

MAIN UNIT RESISTORS

List of resistors for PWB-A (Main Unit) continued.

CABINET PARTS

CABINET PARTS LOCATION

Diagram indicating the location of cabinet parts on the unit.

PACKING OF THE SET

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