Changhong LT32600, LS12 Schematic
File No.
LCD/PDP COLOUR TV
SERVICE MANUAL
CHASSIS NO.:LS12
Please read this manual carefully before service.
Nov 03.2009 Rev1.0
1
Contents
Part I: Specifications and Composition ....................................................... 3
Part II:
Part III:
Part IV:
Function Introduction of Main IC....................................................... 5
Factory Setup and notice ...................................................................26
Operation help…………………………........................................................27
2
PartⅠ: Specifications and Composition
1、Main Feature：
Region
Radio
Frequency
Signal
Video system
（or Y/C）
Color
system
Sound
system
PAL/SECAM
B/G、D/K、I、L
PAL/SECAM/NTSC
Europe
Channels preset 100 ATV
Audio output
（THD≤7%）
Power source
400 DTV
2W+2W
220V～240V
Teletext Page 100
VCHIP、CCD
None
Audio NICAM
SCART Interface X 1
VGA Signal Input X 1
YPbPr High Definition
Signal
X 1
HDMI Digital Input X 1
Earphone X 1
OSD Language English etc.
USB Option
3
2、Unit IC Compositions：
This chassis LCD TV is using a high performance and fully
integrated chip MSD109,See this IC frame as below:
4
PartⅡ: Brief Introduction to Main IC Function
1.Main ICs and Functions：
NO. Location Type Main Function
1 U17 DTI1-E4I1VH Main Tuner
2 U9 MSD209FG-PB-V01 Main Scaler IC
3 N1,N2 HYB18TC1G160C2F-2.5 DDR
4 U10 EON_25B64 Flash
5 U36 ZL10353 DEMO(Digital)
6 U30 TEA2025B Audio AMP
7 U11 24LC32B USER DATA
2. IC and Main component Function Introduction
a. Main Tuner (DTI1-E4I1VH)
Pin Definition Description
1 NC Not connect
2 VCC2 +5V POWER
3 RF-AGC RF-AGC monitor(Not connect)
4 SCL I2C Serial Clock
5 SDA I2C Serial DATA
6 VCC3 +5V POWER
7 TU Tuning voltage monitor(Not connect)
8 AS Address
9 IF-AGC IF AGC Control Voltage
10 DIF1 High level IF output1
11 DIF2 High level IF output1
12 AIF Analog IF output
5
b. MAIN IC (MSD109CL-H-LF)
6
7 8 9
10 11
12 13 14 15 16 17 18 19 20 21 22 23
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