Table of Contents
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25K-M100/180
CK25M10
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 ............................................................................ 10
» CHASSIS LAYOUT ........................................................................................................................... 16
» BLOCK DIAGRAM ............................................................................................................................ 19
» SCHEMATIC DIAGRAMS ................................................................................................................. 22
» PRINTED WIRING BOARD ASSEMBLIES ....................................................................................... 37
» REPLACEMENT PARTS LIST .......................................................................................................... 42
» PACKING OF THE SET .................................................................................................................... 57
POWER INPUT ................................................... 120 V AC 60 Hz
POWER RATING .................................................................. 115 W
PICTURE SIZE ........................................... 2,032cm
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
AUDIO POWER
25K-M100/180, CK25M10 .. 1.3W +1.3W (at 10% distortion and
25K-S100/180, CK25S18 ............... 1.3W (at 10% distortion and
SHARP CORPORATION
SERVICE MANUAL
25K-S100/180
CK25S18
MODELS
CONTENTS
ELECTRICAL SPECIFICATIONS
2
(315sq inch)
(Nominal)
Dual CH Operate)
Dual CH Operate)
COLOR TELEVISION
Chassis No. SN-81
25K-M100/180, 25K-S100/180
CK25M10, CK25S18
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
Specifications are subject to change without
prior notice.
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
1
25K-S100/180/S100/S180
CK25M10,CK25S18
S20L625K-M100
Page
(EIA, Channel Plan U.S.A.)
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Table of Contents
Related Manuals for Sharp 25K-S100
Summarization of Contents
Service Safety Precautions
General Service Warnings
Key safety warnings and precautions for technicians during service work.
High Voltage & X-Radiation Limits
Guidelines for managing high voltage and X-radiation risks during TV service.
Receiver Preparation for Return
Essential safety checks and procedures before returning the receiver to the user.
User Control Locations
Front Panel Controls
Identification and function of controls located on the TV's front panel.
Remote Control Functions
Description of basic functions and buttons on the TV's remote control.
Installation and Service Instructions
Circuit Protection & High Voltage Checks
Details on circuit protection fuse and high voltage verification procedures.
X-Radiation Protector Circuit Test
Procedure to test the X-radiation protection circuit's proper operation.
Service Adjustment Procedures
Service Mode Operation
Instructions for entering and exiting the TV's service mode for adjustments.
Adjustment Item Tables
Tables detailing service adjustment items, initial values, ranges, and contents.
Specific Adjustment Steps
Detailed steps for performing various service adjustments like VCO, AGC, and White Balance.
Picture & Linearity Adjustments
Procedures for adjusting picture quality aspects like brightness, size, and phase.
MTS Adjustment Procedures
MTS Level & VCO Adjustments
Steps for adjusting MTS signal level and VCO parameters for stereo sound.
Filter & Separation Adjustments
Procedures for filter settings and separation adjustments in MTS audio.
Chassis Layout Diagrams
25K-M100/CK25M10 Chassis Layout
Diagram showing the physical layout of components on the 25K-M100/CK25M10 chassis.
25K-M180 Chassis Layout
Diagram showing the physical layout of components on the 25K-M180 chassis.
25K-S100/180, CK25S18 Chassis Layout
Diagram showing the physical layout of components on the 25K-S100/180, CK25S18 chassis.
Block Diagrams
25K-M100/CK25M10 Block Diagram
Functional block diagram for the 25K-M100/CK25M10 television models.
25K-M180 Block Diagram
Functional block diagram for the 25K-M180 television model.
25K-S100/180, CK25S18 Block Diagram
Functional block diagram for the 25K-S100/180, CK25S18 television models.
Schematic Diagrams
Schematic Description & Notes
General notes, measurement conditions, and waveform information for schematics.
CRT & Front AV Unit Schematics
Schematic diagrams for the CRT unit and the front AV input unit.
Main Unit Schematics
Main-1 Unit Schematics
Detailed schematic diagram for the main unit, part 1.
Main-2 Unit Schematics
Detailed schematic diagram for the main unit, part 2.
Printed Wiring Board Assemblies
PWB-A: Main Unit Wiring Side
Wiring diagram for the PWB-A main unit showing component placement.
PWB-A: Main Unit Chip Parts Side
Component layout diagram for PWB-A main unit, focusing on chip components.
Parts List
Component Identification
List of key components like Picture Tube, ICs, Transistors, and Diodes with part numbers.
Detailed Component Lists
Comprehensive lists of Capacitors, Resistors, Filters, and Coils with specifications.
Miscellaneous and Accessories
Lists of miscellaneous parts, supplied accessories, and packing materials.
Cabinet Parts
Cabinet Parts Description
List of cabinet parts and their corresponding part numbers for various models.
Cabinet Parts Location
Diagrams illustrating the location of cabinet parts on the TV units.
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