D-Bose LT32Q5LFH – Akai LT32Q5LFH - 32 inchTFT LCD TVCircuit Diagram – Service Mode

How to enter Service Mode to Akai LT32Q5LFH and D-Bose LT32Q5LFH  32" WIDE TFT LCD TV

LT32Q5LFH is a color active matrix TFT (Thin Film Transistor) liquid crystal display (LCD) that uses amorphous silicon TFTs as switching devices. This model is composed of a TFT LCD panel, a driver circuit and a back-light system. The resolution of a 32.0" contains 1366 X 768 pixels and can display up to 16.7 million colors with wide viewing angle of 85 degree or higher in all directions.

Service mode entry and data Adjustment

When the EEPROM has been replaced, the SVC data should be restored as the function of individual system and specification. When the EEPROM has been replaced White Blance Checking.

Enter and exit Service mode

[into the SVC mode, Initialize with default data.] 

1) Press 5 Seconds MENU buttons on both TV set and Remote Controller at the same time to get into SVC mode. 

2) Press the PR ▲/▼  button several times to find Service Data. 

3) Input the corresponding SVC data referring to Table below with the VOL ◄/►  key. 

4) Press TV/AV button to exit Service mode.

Circuit Diagram [Schematic]

Click on the schematic to magnify

The TFT LCD TV described in the followings is based on a Multi TV system, digital Control display, 26.0" diagonal. The TFT LCD TV is intended to be a finished product, Basically a display device mounted inside an enclosure which will provide the safety Requirements. With the exception of LCD Panel, the display device shall be composed entirely of solid state components. These components shall have a history of reliable service in identity applications and shall be applied in the circuits.

1. SCALER SECTION. 

2. VCT 49xxi SECTION. 

3. Video A/D Converter.

SCALER SECTION. Device : MST5151A Features: 

LCD TV controller with PC & multimedia display functions

Input supports up to UXGA & 1080P Supports up to SXGA panels

Integrated two-port triple-ADC/PLL

Integrated DVI/HDCP/HDMI compliant receiver

YUV422 digital video input ports

Dual high-quality scaling engines

Dual 3-D video de-interlacers

Full function PIP/POP

MStarACE picture/color processing engine

Embedded On-screen display controller (OSD) engine

Digital audio I/O & sync processor

Built-in dual-link LVDS transmitter

5 Volt tolerant inputs

Low EMI and power saving features

Supports PWM & GPO controls

208-pin PQFP package

Analog RGB/YPbPr Input Ports

Dual analog ports support up to 165Mhz

Supports PC RGB input up to UXGA@60Hz

Supports HDTV RGB/YPbPr/YCbCr up to 1080P

On-chip high-performance PLLs

Supports Composite Sync and SOG (Sync-on-Green) separator

Automatic color calibration

DVI/HDCP/HDMI Compliant Input Port

Operates up to 165 MHz (up to UXGA @60Hz)

Single link on-chip DVI 1.0 compliant receiver

High-bandwidth Digital Content Protection

(HDCP) 1.1 compliant receiver

High Definition Multimedia Interface (HDMI)

1.0 compliant receiver with I2S and S/PDIF digital audio outputs

Long-cable tolerant robust receiving

Video Input Port

Two 4:2:2 ITU656 8-bit digital video input ports

One 4:2:2 ITU601 16-bit digital video input port

Supports 16-bit YUV 4:2:2 interlaced/ progressive video input up to 1080i/720P

Auto configuration and detecting

Au-Configuration/Auto-Detectionto input signal format (SOG, Composite, Separated HSYNC, VSYNC, and DE),

and input mode (all PC & TV modes) detection

Auto-tuning function including phasing, positioning, offset, gain, and jitter detection

Sync Detection for H/V Sync

Dual High-Performance Scaling Engines

Fully programmable shrink/zoom capabilities

Nonlinear video scaling supports various modes including Panorama

Video Processing & Conversion

Dual 3-D motion adaptive video de-interlacers with upgraded edge-oriented adaptive

algorithm for smooth low-angle edges

Automatic 3:2 pull-down & 2:2 pull-down detection and recovery

PIP/POP with programmable size and location, supports multi-video applications

Video-over-graphic overlay

MStar 2nd Generation Advanced Color Engine

On-Screen OSD Controller

The MST5151A is a high performance and fully integrated graphics processing IC solution for multi-function LCD monitor/TV with resolutions up to SXGA. It is configured with an integrated triple-ADC/PLL, an integrated DVI/HDCP/HDMI receiver, two video de-interlacers, two high quality scaling engines, an on-screen display controller, and a built-in output clock generator. By use of external frame buffer, PIP/POP is provided for multimedia applications. It supports de-interlaced full-screen video, video-on-graphic overlay, split screen, frame rate conversion, and aspect ratio conversion for various video sources. To further reduce system costs, the MST5151A also integrates intelligent power management control capability for green-mode requirements and spread-spectrum support for EMI management.