YHi LT32C1M1 Service User manual

Ya Hsin Industrial Co., Ltd.
Service Manual
Revision: 1.00
Date: 16-Apr.-2006
Model Name: LT32C1M1
32" Color TFT LCD Television (NTSC)

1.0 Product Description
1.1 Introduction
1.2 Features
1.3 General Information
1.4 Outline Dimension
2.0 Engineering Specifications
2.1 TFT LCD Panel Specifications:
2.2 Optical Characteristics
2.3 I/O Connectors
2.4 D-Sub (Analog) Input
2.5 PC Audio Input (line-in)
2.6 ISP (In System Programming)
2.7 Analog Compliant Timings
2.8 Power Management
2.9 Packaging Specification
2.10 Environmental Characteristics
AU T315XW01 V5
2.11 Safety
3.0 Functions & OSD Operation
3.1 Function Controls
3.2 Remote Controller
3.30SD Operating Procedures
3.4 PIP Structure
4.0 System descriptions
4.1 System block diagram (1)
4.2 System Block Diagram (2)
4.3 System Circuitry
4.3.1 Main board
4.3.2 Video board
4.3.3 Power board
4.3.4 Front RCA board
4.3.4 Key board
4.4 Pin Configuration

5.0 Mechanical Assembly
5.1 Explore Diagram
5.2 Removal and Replacement
5.2.1 Remove and Replace Stand
5.2.2 Remove and Replace Video board
5.2.3 Remove and Replace Rear cover
5.2.4 Remove and Replace Front RCA board and Card Reader(Option)
5.2.5 Remove and Replace Main board
5.2.6 Remove and Replace Power board
5.2.7 Remove and Replace Panel
6.0 Troubleshooting Guide
7.0 Spare Part Material List

1.1
1.0 Product Description
Introduction
The purpose of this service manual provides integral information for the qualified skillful
technicians need to maintain the LT32CxM1 (32.0- inches TFT-LCD TV).
1.2 Features
[32" wide screen WXGA (1366*768)TFT LCD panel
Analog PC signal input
16 - CCFTs (Cold Cathode Fluorescent Tube)
Supported to 85Hz refresh rate
Supported to 16.7M colors display
Supported VESA-DDC 2B plug & play function
Supported VESA-DPMS power managelnent function
• LVDS (Low Voltage Differential Signaling) interfiace (2 pixels/clock)
•Multi-Lan_age OSD :English, Spanish, French
• Wide Viewing Angle 170 /170
• Analog TV Tuner
• V-Chip parental control/C.C, for USA
• VESACompliant (100 x 100 lrnn)
• Soundmode (MTS) support
• Class D Amplifier
• 3D Noise reduction filter
• PIP (picture in picture)/PBP (picture by picture)
• Built-in Power supply

1.3 General Information
Product Description
Display area 697.68(H) x 392.26(V)
Number of Pixels 1366 x R.G.B. x 768 Pixels
Pixel pitch 0.51075(H) x 0.51075(W) mm
Pixel arrangement RGB Vertical Stripe
LCD Panel Display color 16.7 M
Display mode Normally Black
Viewing Angle Horizontal: 170 degrees (typical) Degree
Vertical: 170 degrees (typical)
Separate sync. TTL level
Horizontal sync. Positive/Negative
Graphic (VGA) Vertical sync. Positive/Negative
Plug & Play DDC 2B Compliance
Video Composite 140 IRE p-p, 75 ohms
Input 0.7 Vrms
Audio Output 10 W x 2 speakers
Power input 90-263V, 47/63 Hz
Power Source Power output 5V, 16V, 24V
Operation Mode - 232W W
Power Consumption Standby Mode < 5W W

1.4 Outline Dimension
Product Description
130
230,37
Width 840
Height 593 (656 with stand)
Depth 130 (231 with stand)
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Physical Characteristics :
Weight Gross Weight 24.24 Kg (without card reader) /24.44 Kg (with card reader)
Net Weight 19.4 kg (without card reader) /19.6 Kg (with card reader)
Color Defination:
Front Cover(Outside flame)
Front Cover(inside frame)
Back cover
Stand
Base plate
TV Box
Pantone 877C
Pantone Black C
NCS 6502B
Pantone 877 C
Pantone 877 C
NCS 6502B

Engineering Specifications
2.0 Engineering Specifications
2.1 TFT LCD Panel Specifications: AU T315XW01 V5
LCD Active matrix thin-film-transistor (TFT)
Signal Interface LVDS (Low Voltage Differential Signaling)
(2 pixel/clock)
Screen Size 31.51" Diagonal inch
Effective Display size 697.68(H) x 392.26(V) mm
Pixel Number 1366 x R.G.B. x 768 Pixels
Color filter arrangement RGB vertical stripe
Display Method Normally black
Drive Method a-si TFT active matrix
Pixel Pitch 0.51075 (H) x 0.51075 (W) Mm
Brightness 500 cd/m 2 (typ.) cd/m 2
Contrast Ratio 800:1 (typ.)
650:1 (min.)
Display Color 16.7M colors
Response Time (Rise + Decay) 24 ins (Gray to Gray) ins

2.2 Optical Characteristics
Measuring requirement
Engineerin_ Specifications
Input AC Power
Contrast setting
Brightness setting
Lighting
Measurement point
Distance from LCD module
View of measurement machine
Warm up time
110[v]/60[Hz]
Center
Maximum
Outside optical interception
Center (Brightness Uniformity is 5 point)
50[cm]
1[degree]
30[mini
Measuring Equipment
Video Pattern Generator Chroma 2327
LCD Color Analyzer K- l0

Engineering Specifications
0 _tical Specification
Contrast Ratio (Center
of Screen)
Viewing Angle
Response time
Luminance of White
Red
Chr°C°nlatricitY(cIE)_rl_e_
White
Hor.
Ver.
Luminance Uniformity
CR
TFR
TED
LWH
XR
YR
Xc_
Yc_
XB
YB
Xw
Yw
x+
X-
y
y
Ox=O
Viewing
normal angle
Gray to Gray
CR>10
O Definition of Contrast Ratio (CR):
Luminance with all pixels white
CR =Luminance with all oixels black

Engineering Specifications
® Response time is the time required for the display to transfer between any two gray level.
It is defined as the following figure.
A.y _i_h
Anydarker graylevel
T:rl_ TrR
[ fightergray level
IJ,
®Surface Luminance is a measurement of the active display area, 50 cm from the center
of the surface in condition of displaying window pattern.
LCD Module
LCD Panel
of the Screen Photometer
(TOPCON BM-7A)
Field of View = 2°
< 500 mm Light Shield Room