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Hitachi C21-RF80S - 21" CRT TV User Manual

Hitachi C21-RF80S - 21" CRT TV
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SERVICE MANUAL
PAL/SECAM/NTSC
CAUTION:
Before servicing this chassis, it is important that the
service technician read the Important Safety Note
in this Service Manual.
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
COLOUR TELEVISION
OCT 2003 Digital Media System Group, Hitachi Asia Ltd.
SC
Number : 0009E
3P31 Chassis
"
"
C21-RF80S/SN/SNT
Destination Code
O81 O51 751
19* 201 433
98* 121
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Hitachi C21-RF80S - 21" CRT TV Specifications

General IconGeneral
Screen Size21 inches
Display TechnologyCRT
Aspect Ratio4:3
TunerAnalog
InputsRF, Composite

Summary

Important Safety Note

Safety Precautions

Essential safety measures for servicing the TV, including isolation transformer use and protective device checks.

X-Radiation Precautions

Guidelines to limit X-radiation exposure, emphasizing correct replacement tubes and high voltage limits.

Product Safety Notices

Highlights components critical for safety and recommends using specified replacement parts to avoid hazards.

Technical Specification

Chassis Block Diagram

IC Block Diagrams

IC 701 TV Signal Processor TDA93XXPS/N2/5I Block Diagram

Block diagram for the TDA93XXPS/N2/5I TV Signal Processor, covering video, teletext, and geometry functions.

IC 861 Digital TV Sound Demodulator TDA9874AH Block Diagram

Block diagram for the TDA9874AH Digital TV Sound Demodulator/Decoder IC, detailing sound processing and interfaces.

Service Adjustments

Alignment Instructions and Tools

Prerequisites, tools, and steps for TV alignment, including safety and power adjustment checks.

General Service Adjustments

Procedures for entering factory mode and performing adjustments like focus, screen voltage, and size/cushion.

Purity and Convergence Adjustment

Colour Purity Adjustment Procedure

Step-by-step guide for adjusting colour purity, involving degaussing, white signal, and yoke manipulation.

Convergence Adjustment Procedure

Steps for adjusting picture convergence using dotted patterns and static convergence magnets.

Remote Controller Functions

On Screen Displays

Replacement Parts List

Electrical Parts List

C21-RF80 Schematic Diagram

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