Sylvania 6620LCT A - User Manual

SERVICE MANUAL
This service manual is for the 6620LCT and
6620LG version A models, which are different
from the 6620LCT and 6620LG non-A version
models.
For 6620LCT and 6620LG version A models, a
suffix “A” is printed on the rating label on the
back of the unit. Refer to the rating label
illustration at right.
Rating Label (Example: 6620LCT)
Suffix "A"
20″ COLOR LCD TELEVISION
6620LCT/6620LG

Summary

Safety Notice

Servicing Safety Precautions

LCD TV Circuit Safety Precautions

Detailed safety checks and precautions for the LCD TV circuit before returning to customer.

Antenna Cold Check Procedure

Leakage Current Hot Check Procedure

Procedure for testing leakage current to ensure safety before returning the unit.

Hot Chassis Warning

Component Overheating and Damage Checks

Product Safety Component Notice

Servicing Precautions and Procedures

Critical Safety Component Replacement

Guidance on replacing critical safety components identified by a symbol.

Crimp Type Wire Connector Replacement

Post-Servicing Safety Checks

Clearance Distance Verification

Checking specified clearance distances between terminals and metallic parts for safety.

Leakage Current Testing Procedure

Procedure for measuring leakage current to ensure electrical safety after servicing.

Standard Servicing Notes

Flat Pack-IC Removal and Installation

Flat Pack-IC Installation Procedure

Semiconductor Handling Precautions

Human Body Grounding for ESD

Procedure for grounding human body to prevent electrostatic discharge.

Workbench Grounding for ESD

Procedure for grounding the workbench surface to prevent electrostatic discharge.

Cabinet Disassembly Instructions

Cabinet Disassembly Flowchart

Cabinet Disassembly Step-by-Step

Electrical Adjustment Procedures

Required Test Equipment for Adjustments

Service Mode Setup Procedure

Steps to enter and set up the television's service mode.

Initial Setting Data Configuration

Flicker Adjustment Procedure

White Balance Adjustment Guide

LCD Television Initialization

System Control Block Diagram

LCD Module Block Diagram

Power Supply Block Diagram

LCD Backlight Control Diagram

Schematic Diagrams and Test Points

Main CBA Schematic Diagram (1;4)

Main CBA Schematic Diagram (2;4)

Main CBA Schematic Diagram (3;4)

Main CBA Schematic Diagram (4;4)

Inverter CBA Schematic Diagram

LCD Main CBA Schematic Diagram (1;2)

LCD Main CBA Schematic Diagram (2;2)

Waveform Checkpoints

Overall Wiring Diagram

Electrical Parts List (Capacitors)

Main CBA Electrical Components

Electrical Parts List: Transistors

Electrical Parts List: Resistors

Sylvania 6620LCT A Specifications

General

Brand	Sylvania
Model	6620LCT A
Category	LCD TV
Language	English