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.
