Sharp 27SC26B

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.
Page
» ELECTRICAL SPECIFICATIONS .........................................................................................................1
» IMPORTANT SERVICE SAFETY PRECAUTION .................................................................................2
» LOCATION OF USER'S CONTROL.....................................................................................................4
» INSTALLATION AND SERVICE INSTRUCTIONS................................................................................5
» SERVICE ADJUSTMENT .....................................................................................................................9
» CHASSIS LAYOUT .............................................................................................................................12
» BLOCK DIAGRAM ..............................................................................................................................13
» DESCRIPTION OF SCHEMATIC DIAGRAMS & WAVEFORMS........................................................14
» SCHEMATIC DIAGRAMS ...................................................................................................................15
» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................22
» PARTS LIST........................................................................................................................................27
» PACKING OF THE SET......................................................................................................................36
CONTENTS
SPEAKER
SIZE ..........................................................9 x 5 cm oval (2 pcs.)
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
POWER INPUT ..................................................... 120V AC, 60 Hz
POWER RATING...................................................................130W
PICTURE SIZE .......................................... 2,187 cm
2
(339sq inch)
CONVERGENCE ............................................................. Magnetic
SWEEP DEFLECTION .................................................... Magnetic
FOCUS ............................................... Hi-Bi-Potential Electrostatic
INTERMEDIATE FREQUENCIES
Picture IF Carrier Frequency ...... 45.75 MHz (Analog Terrestrial)
Sound IF Carrier Frequency....... 41.25 MHz (Analog Terrestrial)
Color Sub-Carrier Frequency ..... 42.17 MHz (Analog Terrestrial)
(Nominal)
AUDIO POWER
OUTPUT RATING..............3.0W + 3.0W (at 10% distortion and
Dual CH Operate)
Specifications are subject to change without
prior notice.
ELECTRICAL SPECIFICATIONS
MODEL
SERVICE MANUAL
27SC26B
COLOR TELEVISION
Digital Terrestrial Broadcast (VHF/UHF) .......................2 thru 69
Chassis No. GB-3D(1W)
IF Center Frequency ........................ 44 MHz (Digital Terrestrial)
(EIA, Channel Plan U.S.A.)
27SC26B

Sharp 27SC26B Specifications

General

Display Technology	CRT
Aspect Ratio	4:3
Inputs	Composite, RF
Display Type	CRT
Screen Size	27 inches

Summary

Electrical Specifications

Power, Speaker, and Tuning Specs

Details on power input, rating, picture size, speaker, and tuning ranges.

IF Frequencies and Audio Power

Specifications for Intermediate Frequencies and audio power output.

Service Safety Precautions

General Warnings and High Voltage Safety

Covers general safety warnings, high voltage limits, and X-radiation concerns.

Safety Checks Before Returning Receiver

Leakage Current and Safety Notices

Procedures for leakage current testing and general safety notices.

Location of User Controls

Front Panel and Remote Control Overview

Identifies front panel controls and basic remote control functions.

Installation and Service Instructions

Circuit Protection and High Voltage Checks

Details on circuit protection, X-radiation tests, and high voltage checks.

Service Adjustment Procedures

Entering, Navigating, and Exiting Service Mode

Instructions for accessing service mode, selecting adjustments, and data manipulation.

VCJ IC Adjustments

Special, Option, and Sound Settings

Specific Service Adjustments

RF AGC, Screen, and White Balance Adjustments

Procedures for adjusting RF AGC, screen settings, and white balance.

Sub-picture and Sub-Bright Adjustments

Instructions for adjusting sub-picture and sub-bright levels.

Picture and Geometry Adjustments

Display and EW Adjustments

MTS Adjustments

MTS Level and Separation Adjustments

Procedures for adjusting MTS level and audio separation.

Chassis Layout Diagram

Block Diagram

Schematic Diagram Descriptions

Waveform Measurements

Details on waveform measurement conditions and notes.

Schematic Diagram: CRT Unit

Schematic Diagram: Main-1 Unit (Part 1)

Schematic Diagram: Main-1 Unit (Part 2)

Schematic Diagram: Main-1 Unit (Part 3)

Schematic Diagram: Main-1 Unit (Part 4)

Schematic Diagram: Main-1 Unit (Part 5)

2-LINE YC Schematic

2-LINE YC Schematic Continuation

Printed Wiring Board Assemblies

PWB-A: Main Unit (Wiring Side)

Component layout for the Main Unit PWB-A (wiring side).

PWB-A: Main Unit (Wiring Side) Continuation

PWB-A: Main Unit (Component Side)

PWB-A: Main Unit (Component Side) Continuation

Printed Circuit Board Layouts

PWB-B: CRT Unit (Wiring Side)

Component layout for the CRT Unit PWB-B (wiring side).

PWB-D: 2-LINE YC Units

Component layouts for the 2-LINE Y/C Units PWB-D.

Parts List

Parts Replacement and Ordering Information

Guidelines for replacing parts and ordering procedures.

Picture Tube Parts List

List of parts specific to the picture tube.

Printed Wiring Board Assemblies List

List of printed wiring board assemblies.

Integrated Circuits List

List of integrated circuits used in the unit.

Transistors List

List of transistors used in the unit.

Diodes List

List of diodes used in the unit.

Diodes List Continuation

Packaged Circuits List

Filters and Coils List

Transformers List

Capacitors List

Capacitors List Continuation

Resistors List

Resistors List Continuation

Resistors List Continuation

Resistors List Continuation

Miscellaneous Parts List

Miscellaneous Parts List Continuation

CRT Unit Parts List Categories

CRT Unit Transistors, Diodes, and Resistors

Lists transistors, diodes, and resistors for the CRT unit.

CRT Unit Resistors Continuation

2-Line YC Unit Parts List

Miscellaneous Parts List

Packing and Supplied Items

Packing Parts and Supplied Accessories

Details on packing materials and supplied accessories.

Cabinet Parts and Location

Packing of the Set