Akira LCT-37CH01ST Schematic
LCD TV
Service Manual
-2 -
MODEL:
LCT-37CH01ST
Model No.: LCT-26CH01ST.doc
Version: 1.0
CONTENTS
SAFETY PRECAUTION ............................................................................................................ 4
SPECIFICATION........................................................................................................................ 6
APPEARANCE OF REMOTE CONTROL ................................................................................. 7
OPERATION .............................................................................................................................11
CHARACTERISTIC OF CHASSIS .......................................................................................... 23
FUNCTION OF ICs.................................................................................................................. 27
SIGNAL PROCESSING ANALYSIS......................................................................................... 52
TROUBLE SHOOTING............................................................................................................ 63
LIST OF CRITICAL PARTS ..................................................................................................... 64
FACTORY MODE SETTING & NOTES................................................................................... 65
APPENDIX.................................................................................................................... 69
1) SCHEMATIC DIAGRAM OF CHASSIS
2) SCHEMATIC DIAGRAM OF POWER MODULE
3) ASSEMBLY DIAGRAM
4) WIRING DIAGRAM
5) EXPLODED VIEW AND PART LIST
Model No.:LCT-37CH01ST.doc
Version:1.0
3
IIMMPPOORRTTAANNAATT SSAAFFEETTYY PPRREECCAAUUTTIIOONNSS
Model No.:LCT-37CH01ST.doc
Version:1.0
4
Model No.:LCT-37CH01ST.doc
Version:1.0
5
SSPPEECCIIFFIICCAATTIIOONN
Model No.:LCT-37CH01ST.doc
Version:1.0
6
AAPPPPEEAARRAANNCCEE && FFUUNNCCTTIIOONN CCOONNTTRROOLL
No. NAME DESCRIPTION
○1
○2
○3
○4
○5
○6
○7
(1) Headphone Output Port for headphone audio output
(2)
(3) Power Indicator
Notice: In this manual, the icon with “< >” means the button on the remote control, the icon with “[ ]” mean
the button on the LCD TV.
<MENU> Open the menu switch among the menus
<TV / AV>
<VOL+> To increase the sound volume , Adjust functions in menu operation.
<VOL-> To decrease the sound volume, Adjust functions in menu operation.
<CH+>
<CH->
Infrared Receiver
Window
To switch among the signal source of TV, SCART1, SCART2, AV,
S-VIDEO, COMPONENT, VGA and HDMI
1. In TV mode, increase channel number
2. To select functions in menu operation
1. In TV mode, decrease channel number
2. To select functions in menu operation
Enter or leave the standby mode, same as
To receive the signal from remote control
Red indicator lighting, this means the TV is in standby mode; Red indicator (lighting for
10 seconds) and yellow indicator (lighting for 5 seconds) by times, this means the TV is
in standby mode and the time to turning on the TV is set; Green indicator lighting this
means the TV is in normal working condition; Green indicator (lighting for 10 seconds)
and Red indicator (lighting for 5 seconds) by turns, this means the TV is in normal
mode with setting time to turning off or setting the sleeping TV off mode.
on the remote control.
Model No.:LCT-37CH01ST.doc
Version:1.0
7
REAR SIDE OF LCD
No. Name Function
(1) Power Socket AC power input for LCD TV
(2) Switch of AC Power Turn on & Off the AC power of TV
(3) Signal Input / Output
terminal
Terminal Description:
No. Name Description
VGA Connect the VGA signal of computer with this port VGA cable, connect audio signal
○1
S-VIDEO Brightness and chroma signal input, Notice: S-Video and AV can not be used at
○2
COMPONENT
○3
AV AV audio / video signal input terminal
○4
HDMI Port for digital audio & video signal input
○5
SCART1 Video and RGB signal input, Video signal (RF VIDEO signal) output
○6
SCART2 Video and Y/C signal input, Video signal (RF VIDEO signal) output
○7
Headphone
○8
Output
TV Signal input TV signal input port
○9
with VGA’s audio input port by audio cable.
same time for they share of one signal channel.
Connect the TV COMPONENT signal port with video COMPONENT signal from
DVD or other equipments.
Port for headphone audio output
Including audio / video input of AV, S-Video, SCART1, SCART2, Component,
VGA and HDMI.
Model No.:LCT-37CH01ST.doc
Version:1.0
8
REMOTE CONTROL
The buttons of the original remote control are as following:
Model No.:LCT-37CH01ST.doc
Version:1.0
9
Model No.:LCT-37CH01ST.doc
Version:1.0
10
OOPPEERRAATTIIOONN
Model No.:LCT-37CH01ST.doc
Version:1.0
11
Model No.:LCT-37CH01ST.doc
Version:1.0
12
Model No.:LCT-37CH01ST.doc
Version:1.0
13
Model No.:LCT-37CH01ST.doc
Version:1.0
14
Model No.:LCT-37CH01ST.doc
Version:1.0
15
Model No.:LCT-37CH01ST.doc
Version:1.0
16
Model No.:LCT-37CH01ST.doc
Version:1.0
17
Model No.:LCT-37CH01ST.doc
Version:1.0
18
Model No.:LCT-37CH01ST.doc
Version:1.0
19
Model No.:LCT-37CH01ST.doc
Version:1.0
20
Model No.:LCT-37CH01ST.doc
Version:1.0
21
Model No.:LCT-37CH01ST.doc
Version:1.0
22
CChhaarraacctteerriissttiicc ooff CChhaassssiiss
1. Specifications
Region Europe America Other regions
Color
mode
RF signal
Video(or Y/C)signal
Program presetting 100 sets（0-99）
Sound Power （THD
≤7%）
Power voltage 100V～240V 100V～240V 100V～240V
Graphics and text 100 pages X 100 pages
VCHIP、CCD X Yes X
Sound NICAM、IGR BTSC NICAM、IGR
SCART interface Yes X X
VGA signal input Yes Yes Yes
YpbPr HD signal input Yes Yes Yes
HDMI digital signal
input
Ear pho n e Yes Yes Yes
OSD language
Automatic shut down if
no signal
Program reserve
function
Channel exchange
and sorting
Energy saving function
Plug and Play
Sound
mode
PAL 、SECAM NTSC、PAL M 、PAL N PAL 、NTSC、SECAM
PAL －D/K、B/G、I
SECAM－ L/L’、 D/K、
B/G
PAL ,NTSC,
SECAM
5W+5W 5W+5W 5W+5W
Yes Ye s Yes
Multinational languages
(English, French,
German, Italian,
Portuguese etc)
Automatically enter into standby state after 5 minutes in TV no signal state
Capable of reserving 5 sets program jumping time, if time is up to the reserved time,
automatically jump to the corresponding program
Customer could rearrange the channels according to personal habit
Customer could adjust LCD screen backlight brightness manually. Appropriately
reducing the backlight brightness could save energy.
LCD TV could be used as computer screen, no need for the installation of software,
which is Plug and Play in real sense
NTSC-M/N、
PAL-M/N
PAL ,NTSC，
NTSC4.43,SECAM
68 sets（AIR：2-69）
125sets CABLE：1-125）
English, French,
Portuguese Spanish
PAL －D/K、B/G、I
SECAM－D/K、B/G
NTSC-M
PAL,NTSC,NTSC4.43,
SECAM
236 sets（0-235）
English, French, German,
Russian
2. Circuit constitution
AKIRA LCD TV with LS01 chassis is made up of switch power, system control circuit, video
processing circuit, audio processing circuit, sound power amplifier circuit, AV input circuit,
LCD screen module. Block circuit diagram of the whole machine is shown as below:
Model No.:LCT-37CH01ST.doc
Version:1.0
23
1) European market:
Model No.:LCT-37CH01ST.doc
Version:1.0
24
Loading...