Bush A632N User Manual

26″&32″LCD TV Bush A626N&A632N
1
Service
Service
Service
Table of Contents
Description Page Description Page
SAFETY NOTICE
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS
AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
6.2 Power Board…..…………..…………..…..…….......31
6.3 Key Board………………………..……...……….......40
6.4 IR Board…………………………..….…….…….......40
7. Adjustment...............................................................41
8.Block Diagram.……..................................................42
9.Wiring Diagram.…….................................................43
10.Schematic Diagram……..……..……….……….......45
10.1 Main Board………….…………………....…..........45
10.2 Power Board………..…..…………...……….........61
10.3 Key Board…………….………….……………........68
10.4 IR Board………..………………….……….............69
10.Exploded View…………………….………….…......71
11.BOM List……………….…………….….………......75
Table of Contents........……...................................…........1
Important Safety Notice.......................................……......2
Revision List………………………………………………....3
1. General Specifications...............................………........4
2. Operating Instructions…………………….……...….......6
2.1 The Use of Remote Control…….…………...…….......6
2.2 To Use the Menus...……………………….……….......7
2.3 How to Connect……..…………………….………......17
2.4 Front Panel Control Knobs……………….………......18
3.Input/Output Specification…………....................……..19
4.Mechanical Instructions……………………..................23
5.Repair Flow Chart ……………………….…….……......25
6.PCB Layout ………………..………………....…...........28
6.1 Main Board………………..……………......…..…......28

Bush A632N Specifications

General

HDMI Ports	2
USB Ports	1
Built-in Freeview	Yes
Screen Size	32 inches
Resolution	1366 x 768 pixels

Summary

Important Safety Notice

Warnings and Precautions

Crucial safety information, warnings, and cautions for servicing and handling the TV.

General Specifications

Operating Instructions

2.1 Remote Control Usage

Guide to using the TV remote control buttons and their functions.

2.2 Using the On-Screen Menus

Instructions for navigating and adjusting settings via the TV's OSD menus.

TV Settings Menu

Configuration options for country, audio, channel scanning, and fine-tuning.

Features Menu Settings

Options for menu language, picture format, subtitles, teletext, and HDMI settings.

Parental Controls and Common Interface

Setting up channel blocks, parental guidance, and managing CI modules.

2.3 Connecting External Devices

Instructions for connecting AV, SCART, HDMI, PC, and other devices to the TV.

Input/Output Specifications

Troubleshooting Flowcharts

No Picture Troubleshooting

Diagnostic flow for resolving 'No Picture' issues.

Audio and Power Troubleshooting

Diagnostic flowcharts for 'No Sound' and 'No Power' issues.

Display and Key Board Troubleshooting

Diagnostic flowcharts for 'No Display' and Key Board related problems.

PCB Layout Diagrams

System Block Diagram

Wiring Diagrams

A626N Internal Wiring

A632N Internal Wiring

Schematic Diagrams

10.1 Main Board Power Schematics

Detailed schematics for the main board's power supply and control circuits.

Main Board Power Schematics (Part 2)

Main Board DRAM Schematics

Main Board Peripheral Schematics

Main Board Flash and CI Interface Schematics

Main Board HDMI and SPDIF Schematics

Main Board Video and Audio Input Schematics

Main Board Component Video Input Schematics

Main Board SCART and IR Schematics

Main Board Audio System Schematics

Main Board Audio Amplifier Schematics

Main Board Half SCART and DAC Schematics

Main Board CI Interface Schematics

Main Board LVDS Output Schematics

Tuner Module Schematics

Schematic diagram for the TV tuner, including RF input and control signals.

HDMI Switch Schematics

Key Board Schematics

IR Board Schematics

Power Board Schematics

2) Inverter Circuit

Schematic diagram of the inverter circuit for backlight illumination control.

Bill of Materials (BOM)