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LG CB777G User Manual

LG CB777G
34 pages
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COLOR MONITOR
SERVICE MANUAL
Website:http://biz.LGservice.com
E-mail:http://www.LGEservice.com/techsup.html
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
MENU SELECT
MODEL:
StudioWorks 700S (CB777G-NA), StudioWorks 700E (CB777G-AA)
StudioWorks 700B (CB777G-EA)
CHASSIS NO. : CA-109
FACTORY MODEL: CB777G
*( ) ID LABEL Model No.
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LG CB777G Specifications

General IconGeneral
BrandLG
ModelCB777G
CategoryMonitor
LanguageEnglish

Summary

Specifications

Safety Precautions

Safety-Related Component Warning

Warning about critical safety components requiring manufacturer-specified replacement parts to prevent hazards.

Circuit Modification Caution

Caution against modifying any circuit to ensure safety and maintain warranty coverage.

Servicing Safety Checks

Emphasizes caution during servicing due to high voltage exposure in deflection circuits.

Fire and Shock Hazard Precautions

Mandates isolation transformers, correct lead dress, protective device reinstallation, and soldering inspection.

X-Radiation Prevention Measures

Steps for measuring high voltage and preventing X-radiation by maintaining factory-recommended levels.

Operating Instructions

Description of Block Diagram

Adjustment Procedures

Detailed Adjustment Methods

Comprehensive steps for calibration using alignment programs, patterns, and specialized meters.

Voltage and Focus Adjustments

Procedures for adjusting critical voltage levels (B+, High Voltage) and focus controls.

Factory Mode and White Balance Calibration

Steps for setting factory defaults, adjusting white balance, and calibrating luminance.

Troubleshooting Guide

No Power Troubleshooting

Flowchart for diagnosing and resolving power-related issues, checking fuse, voltages, and key components.

No Character Troubleshooting

Flowchart for diagnosing missing character display, checking ICs, signals, and cathode voltages.

No Raster Troubleshooting

Flowchart for diagnosing lack of raster, checking power indicator, voltages, and CRT components.

No Horizontal Deflection

Flowchart for troubleshooting missing horizontal deflection lines, checking transistors and voltages.

No Vertical Deflection

Flowchart for diagnosing missing vertical deflection lines, checking ICs and voltage supplies.

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