Memorex MT2025D - 20" CRT TV User Manual

SERVICE MANUAL
Colour Television
Haier model:
21F7A
Customer model:
MT2025D
l FEATURES
l DVD-TV 21” COMBO
l AUTO TUNE/181 CHANNES
l DVD/VCD/SVCD/CD/CD-R/CD-RW/JPEG/MP3 COMPATIBLE
l FORMATO DE VIDEO 4:3PS、4:3LB
l DOLBY AC-3 DECODE
l PANATAL LOCK
l ATSC TUNER
l AC/DC
CAUTION READ
THIS MANUAL CAREFULLY TO DIAGNOSE
TROUBLE CORRECTLY BEFORE OFFERING
SERVICE .
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Memorex MT2025D - 20" CRT TV Specifications

General

Brand	Memorex
Model	MT2025D - 20" CRT TV
Category	CRT TV
Language	English

Summary

SAFETY

Isolation Check

Perform safety check for electrical shock hazard on exposed metal parts.

Dielectric Strength Test

Test isolation between AC primary circuit and exposed metal parts.

TV Block Diagram

Memory IC Replacement

Procedure for Replacing Memory IC

Step-by-step guide for replacing the memory IC, including system default value setting.

Service Adjustment

Focus Adjustment

Geometrical Adjustment

Error Detection Process

Troubleshooting No Raster

Troubleshooting Horizontal Bright Line

Troubleshooting No Sound and Picture

Troubleshooting Picture but No Sound

IC Functional Descriptions

IC201 R2J10165GC Description

Detailed functional description and pin assignments for IC201.

IC Functional Descriptions (Continued)

IC602 24C16 Description

Specific IC Descriptions

IC701 Sound Amplifier (TFA9800J)

Description of IC701, the sound power amplifier.

IC401 Vertical Output (STV9302A)

Description of IC401, the vertical output IC.

U101 Tuner Description

Test Point Waveforms

IC Voltages and Adjustments

IC Voltages

Table listing voltage readings for various ICs for diagnostic checks.

Purity / Convergence Adjustment

Procedure for adjusting picture purity and convergence for optimal display.

Purity Adjustment Procedure

Static Convergence Adjustment

Dynamic Convergence Adjustment

DVD Maintenance Introduction

MTK1389D Decoder Section

MTK1389D Servo Section