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Coby TFTV3225S2 User Manual

Coby TFTV3225S2
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Service Manual
Sep. 30th, 2010 (Version 1.3) Page 1 / 21
Service Manual
TELEVISION SET
WITH 3216:9 TFT LCD PANEL
Model : TFTV3225S2
Copyright 2010 COBY Electronics Co., Ltd.
All Right Reserved
Pravin Mevada
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Coby TFTV3225S2 Specifications

General IconGeneral
BrandCoby
ModelTFTV3225S2
CategoryTV
LanguageEnglish

Summary

Notes For Installation

Specification

Electrical Specification

Details power consumption, supply, environment, and data output.

Power Board Specification

Details AC input requirements and frequency for the power board.

Pin-CON15 Connection to main board

Lists pins and functions for CON15 on the main board.

Pin-CON3 for inverter PUB

Lists pins and functions for CON3 on the inverter board.

Television Part

SOUND

Specifies sound output power and audio settings.

EXT. TERMINAL

Lists external input terminals like Component, HDMI, AV, Tuner, VGA.

RGB (PC-VGA15) Part

Details features of the Analog RGB input, including rates and resolution.

Block Diagram

PCB Mechanical Dimension

TV main board

Shows the top pattern layout of the main PCB.

Key & IR Board Component

Details the key pattern and IR pattern components.

Board Connectors Pin Assignment

CON24: 40 Pin define for Connector to Panel

Pin assignment details for the 40-pin connector to the LCD panel.

CON33: Connector from Main Board to IR Board

Pin assignment for the 5-pin connector between the main board and IR board.

Connector Details

CON37/38: Connector from Main Board to Left/right Speaker

Pin assignment for speaker connectors from the main board.

P7: Connector of VGA(P-Scan) Input

Pin assignment for the 15-pin VGA input connector.

PHONES Connector of PC-Audio INPUT

Pin assignment for the PC-Audio input connector.

Input Connectors

CON10/11: Connector of HDMI (19pin) Input

Pin assignment details for the 19-pin HDMI input connectors.

CON17: Connector of Component-AV

Pin assignment for the Component-AV connector.

CON39: Connector of Component-S-Video

Connector for Component-S-Video.

CON 1: Connector of Component-Y/PB/PR/Y2/PB2/PR2

Connector for Component Y/PB/PR/Y2/PB2/PR2.

Video Input Connectors

CON 2: Connector of Y/Pb/Pr-RL / Y2/Pb2/Pr2-RL

Connector for Y/Pb/Pr-RL / Y2/Pb2/Pr2-RL.

Exploded View

Schematic

Power Connector

Diagram for the power connector and related power supply circuits.

1.2V Core Power

Schematic for the 1.2V core power supply circuit.

2.5V Power Normal

Schematic for the 2.5V normal power supply circuit.

3.3V Power Normal

Schematic for the 3.3V normal power supply circuit.

3.3V Power_Standby

Schematic for the 3.3V standby power supply circuit.

Panel Power

Schematic for the panel power supply.

DVD Power

Schematic for the DVD power supply.

1.8V Power_Normal

Schematic for the 1.8V normal power supply circuit.

Input/Output Schematics

YPbPr INPUT

Schematic for YPbPr input connections.

DVD INPUT

Schematic for DVD input connections.

D-SUB IN

Schematic for D-SUB input connections.

DVD/YUV SWITCH

Schematic for DVD/YUV switch.

Audio out

Schematic for audio output.

AUDIO SWITCH

Schematic for audio switch.

AV INPUT

Schematic for AV input.

VGA Audio IN

Schematic for VGA audio input.

S-V INPUT

Schematic for S-Video input.

HDMI Connector

Schematic for HDMI connectors.

Hot-Plug Control

Schematic for HDMI hot-plug control.

HDMI 3 Connector

Schematic for the third HDMI connector.

Main IC Block Diagram

PAM Audio Amp + 8/10W Speaker

Tuner and RF Circuits

RF AGC Switch

Schematic for the RF AGC switch circuit.

5V Cam Tuner

Schematic for the 5V camera tuner circuit.

Trouble Shooting Flow Chart

Step 1

First step in the troubleshooting flow for display issues.

Troubleshooting Steps

A

Troubleshooting step related to signal cable connection and panel display.

B

Troubleshooting step involving checking the LCD panel and main board.

Step 2

Second step in the troubleshooting flow for no TV/video/VGA picture.

Audio Troubleshooting

Step 3

Third step in the troubleshooting flow for audio issues.

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