Page 1
V23CLTT/V27CMTT/V30CMTT
LCD-TV
Service Manual
Date: Aug 10, 2004
Ver. : 1.0
0
Page 2
Table of contents
1. Precautions & Notice.......................................………………….3
2. Features & Specifications............................................………….5
3. Connection & Applications…………………….....……………..9
4. Controls Location .........................................................................11
5. Remote Control.............................................…….……….….....12
6. Disassembly Instructions.......................…………………..……14
7. Block Diagram....................................................……..…………19
8. Troubleshooting Flow Chart.............................................……..20
9. Electronic Circuit Description................................................…23
10. Circuit Diagram....................................................…………….27
11. PCB Layout....................................................…………………46
12. Electrical Part List.............................................. …………….61
13. Mechanical Disassembly....….......... …....................………....62
Page 3
1. Precautions & Notice
1.1 Safety Precautions
1) Cleaning: Unplug the power cord from the AC outlet before cleaning the
product. Use a damp cloth to clean the product. Do not use liquid cleaners
or aerosol cleaners.
2) Heat sources: Keep the product away from heat sources such as radiators, heaters, stoves and
other heat-generating products (including amplifiers).
3) For added protection for this television equipment during a lightning storm,
or when it is left unattended and unused for long periods of time, unplug it
from the wall outlet and disconnect the antenna. This will prevent damage
to the equipment due to lightning and power-line surges.
4) If an outside antenna is connected to the television equipment, be sure the antenna system is
grounded so as to provide some protection against voltage surges.
Electric service
equipment
Example of antenna grounding
As per national electrical code
Ground clamp
Antenna lead in wire
Antenna discharge
unit
Grounding conductors
Ground clamps
Power service
grounding
Electrode system unit
5) An outside antenna system should not be located in the vicinity of overhead
power lines or other electric light or power circuits, or where it can fall into
such power lines or circuits. When installing an outside antenna system, extreme care should be
taken to keep from touching such power lines or
Page 4
circuits as contact with them might be fatal.
6) Ventilation-The vents and other openings in the cabinet are designed for ventilation. Do not
cover or block these vents and openings since insufficient ventilation can cause overheating
and/or shorten the life of the product. Do
not place the product on a bed, sofa, rug or other similar surface, since they
can block ventilation opening. This product is not designed for built-in installation; do not place
the product in an enclosed place such as a bookcase
or rack, unless proper ventilation is provided or the manufacturer's instructions are followed.
1.2 Product Safety Notice
1) Many electrical and mechanical parts in this chassis provide special visual
safety protection. The protection afforded by them cannot necessarily be
obtained by using replacement components rated for higher voltage, wattage, etc.
2) Before replacing any of these components, read the parts list manual carefully.
The use of substitute replacement parts, which do not have the same safety characteristics, as
specified in the parts list may create shock, fire or other hazards.
1.3 Service Notes
1) When replacing parts or circuit boards, wrap the wires around terminals before soldering.
2) Keep wires away from high temperature components.
3) Keep cable and their shielding in their original position so as to reduce interference.
Page 5
2. Specifications
Specification
V23CLTT
ITEMS SPECIFICATION
Screen size 23” wide TFT-LCD panel
Aspect Ratio 15：9
Resolution
Display
Contrast ratio 400:1(typ)
Brightness 450cd/m
Viewing Angle Over 170∘(Hor.) / 170∘(Vert.)
OSD Language Chin ese , English, French , German , Spanish
TV standard (CCIR) NTSC
TV I/P
Video I/P
PC I/P
Audio I/P Audio I/P：L/Rx3
Video O/P Composite Signal TV only
Audio O/P Audio O/P：L/Px3
Other Functions
Power
Panel Tilt Forwards/ Backwards /Rotation -5∘/ +20∘/ ± 180∘
Wight (net) 10.5Kg (Without Accessories)
TV Turning system PLL 181 Ch.
STEREO MTS+SAP
CATV 125 CH.
Composite Signal CVBS
Y, C Signal S-Video
Composite Signal
Y, Pb/Cb, Pr/Cr
Signal I/P Analog：15 pin D-Sub Connector
PnP compatibility DDC / 2B
I/P Frequency
Recommended Analog：1024X768 (60Hz)
PIP,VoV,3D De-interlace, 3D
comb-filter ,V-Chip, C.C. Settings
Aspect Ration Switching Normal → Periscope → Zoom →Full
Power Supply AC 110V ~ 240V, 50/60Hz
Power Consumption ＜115W
1280 x 768 (WXGA)
2
(typ)
HDTV system (720p, 1080i)
Analog：F
F
Audio 1：CVBS & S-Video
Audio 2：Y, Pb/Cb, Pr/Cr
Audio 3：PC
Speaker (Build-in)：5W+5W (rms)
3.5mm miniature stereo phone jack
Sound level output:：500 mV(rms)
Yes
：31.5KHz to 60KHz
H
：56Hz to 75Hz
V
Page 6
Accessories Remote Control, Batteries, AC cord, 15 Pin D-Sub Signal Cable
V27CMTT
ITEMS SPECIFICATION
Screen size 27＂wide TFT-LCD panel
Aspect Ratio 16：9
Resolution
Display
Contrast ratio 500:1 (typ)
Brightness 500cd/m
Viewing Angle Over 170∘(Hor.) / 170∘(Vert.)
OSD Language Chin ese, English, French, German, Spanish
TV standard (CCIR) NTSC
TV I/P
Video I/P
PC I/P
Audio I/P Audio I/P：L/R x 3
Video O/P Composite Signal TV only
Audio O/P Audio O/P：L/P x 3
Other Functions
Power
Panel Tilt Forwards/ Backwards /Rotation -5∘/ +20∘/ ± 180∘
Wight (net) 14.5Kg (Without Accessories)
TV Turning system PLL 181 Ch.
STEREO MTS+SAP
CATV 125 CH.
Composite Signal CVBS
Y, C Signal S-Video
Composite Signal
Y, Pb/Cb, Pr/Cr
Signal I/P Analog：15 pin D-Sub Connector
PnP compatibility DDC / 2B
I/P Frequency
Recommended Analog：1024X768 (60Hz)
PIP,VOV,3D De-interlace, 3D
comb-filter ,V-Chip, C.C. Settings
Aspect Ration Switching Normal → Periscope → Zoom →Full
Power Supply AC 110V ~ 240V, 50/60Hz
Power Consumption ＜140W
1280 x 720(WXGA)
2
(Typ)
HDTV system (720p, 1080i)
Analog：F
F
Audio 1：CVBS & S-Video
Audio 2：Y, Pb/Cb, Pr/Cr
Audio 3：PC
Speaker (Build-in)：10W+10W (rms)
3.5mm miniature stereo phone jack
Sound level output:：500 mV(rms)
Yes
：31.5KHz to 60KHz
H
：56Hz to 75Hz
V
Accessories Remote Control, Batteries, AC cord, 15 Pin D-Sub Signal Cable
Page 7
V30CMTT
ITEMS SPECIFICATION
Screen size 29.6＂wide TFT-LCD panel
Aspect Ratio 15：9
Resolution
Display
Contrast ratio 500:1(typ)
Brightness 500cd/m2 (Typ)
Viewing Angle Over 170∘(Hor.) / 170∘(Vert.)
OSD Language Chin ese , English, French , German , Spanish
TV standard (CCIR) NTSC
TV I/P
TV Turning system PLL 181 Ch.
STEREO MTS+SAP
CATV 125 CH.
Composite Signal CVBS
Video I/P
Y, C Signal S-Video
Composite Signal
Y, Pb/Cb, Pr/Cr
Signal I/P Analog：15 pin D-Sub Connector
PnP compatibility DDC / 2B
PC I/P
I/P Frequency
Recommended Analog：1024X768 (60Hz)
Audio I/P Audio I/P：L/Rx3
Video O/P Composite Signal TV only
Audio O/P Audio O/P：L/Px3
PIP,VoV,3D De-interlace, 3D
Other Functions
comb-filter ,V-Chip, C.C. Settings
Aspect Ration Switching Normal → Periscope → Zoom →Full
Power
Power Supply AC 110V ~ 240V, 50/60Hz
Power Consumption ＜150W
Panel Tilt Forwards/ Backwards /Rotation -5∘/ +20∘/ ± 180∘
Wight (net) 15.2Kg (Without Accessories)
1280 x 768 (WXGA)
HDTV Ready (720p, 1080i)
Analog：F
F
：31.5KHz to 60KHz
H
：56Hz to 75Hz
V
Audio 1：CVBS & S-Video
Audio 2：Y, Pb/Cb, Pr/Cr
Audio 3：PC
Speaker (Build-in)：10W+10W (rms)
3.5mm miniature stereo phone jack
Sound level output: 500 mV(rms)
Yes
Accessories Remote Control, Batteries, AC cord, 15 Pin D-Sub Signal Cable
Page 8
PC I/P
Preset Timing
Mode NO.
1
2
3
4
5
6
7
Mode Name
Resolution
VGA 70Hz
640X350
VGA 60Hz
640X480
VGA 72Hz
640X480
VGA 75Hz
640X480
SVGA 60Hz
800X600
SVGA 60Hz
800X600
SVGA 72Hz
800x600
H.Freq. (kHz)
V.Freq. (Hz)
31.469
70.087
31.469
59.941
37.861
72.81
37.5
75.0
35.16
56.25
37.876
60.317
48.077
72.118
H. Polarity
Pixel
CLK
V. Polarity
(MHZ)
＋
25.175
－
－
25.175
－
－
31.5
－
－
31.5
－
＋
36.0
＋
＋
40.0
＋
＋
50.0
＋
8
9
10
11
12
13
14
15
SVGA 75Hz
800x600
XGA 60Hz
1024x768
XGA 70Hz
1024x768
XGA 75Hz
1024x768
MAC VGA
640X480
MAC VGA
832x624
US TEXT
720x400
WXGA
1280x768
46.875
75.0
48.363
60.004
56.476
70.069
60.023
75.029
35.0
66.667
49.725
74.550
31.469
70.087
47.73
60.0
＋
49.5
＋
－
65.0
－
－
75.0
－
＋
78.75
＋
－
30.24
－
－
57.283
－
－
28.322
＋
－
80
－
Page 9
3. Connection & Applications
Page 10
Note:
z Audio out: The level of Audio O/P is constant. It won’t be affected by aligning volume, treble and bass.
This connecter should be connected to outer audio amplifier to enlarge the volume.
z Video O/P: When user wants to connect Audio and Video O/P of our LCD-TV to VCR for recording
program, the O/P has only one choice that is TV mode.
z Audio O/P: IF the main display is TV, the Audio O/P must be TV sound; otherwise, if sub display is TV, the
Audio I/P must be selected to “Sub”, so that the Audio O/P will be TV sound.
Page 11
4. Control Location
These buttons control your TV’s basic features, include the on-screen mean. To use the more
advanced features, you must the remote control.
POWER: turn on or turn off the LCD TV.
SOURCE: set up the input source (PC,VIDEO,SV,TV,CV).
MENU: display the main menu.
CHANEL (down/up): change channels on sequence.
VOLUME(+/-): turn up or turn down the volume.
ASPECT RATIO: set up the display (Normal, Periscope, Zoom or Full).
Speaker Speaker
Remote sensor window
Aim the remote control towards this region on the TV.
Page 12
5. Remote Control
The remote control pad works almost as same as ordinary TV remote control that includes the basic
function needed while viewing a live video:
Other Function
PIP Function
TV
PC
AV
SV
CV
SWAP
VOL－
Reset
ARC
Subwoofer
Sleep
Power
Number Buttons
Return
Channel UP
Mute
MENU/Enter
VOL+
TITLE / EXIT
Channel DOWN
APC
Audio Function
Page 13
Summary of Control Button
PPoowweerr ccoonnttrrooll
Press POWER button Direct to turn on or turn off the display
Selecting the signal source
Press TV button Direct to switch to the TV mode.
Press AV button Direct to switch to the AV Video mode.
Press SV button Direct to S-Video mode.
Press CV button Direct to switch to the Component mode (Y Pb Pr).
Press PC button Direct to switch to the PC mode.
Menu Setting
Press MENU/ENTER button Display the main on-screen menu or enter the next menu.
Press TITLE/EXIT button Display the current channel digits/Exit from the menu.
Changing Channels
Press UP button Press Up to change channel on the TV.
Press DOWN button Press Down to change channel on the TV.
Press 0~9，+100 button To select channels directly on the TV.
Press RETURN button Return to the previous channel on the TV.
Sound Control
Press VOL+ button Press to turn up the volume.
Press VOL- button Press to turn down the volume.
Press MUTE button Press to temporarily cut off the sound.
Press MTS button Press to choose stereo, mono or separate audio program supply the
Press AUDIO button Select present audio is main display or sub display.
Press TREBLE button Adjust the treble of audio.
Press BASS button
Press SUBWOOFER button.
PIP Control
Press ON/OFF button Press to watch one of video sources on sub display. Press again to make the
Press TV、AV、SV、CV button Press to select one of the PIP window input source.
Press SIZE button To make the PIP window double, large or small.
Press POSITION button Press to move the PIP window to：Top Left→Top Right→Bottom Right→
Other Function
Press SWAP button Change main display and sub display.
Press RESET button Return to the original factory settings.
Press ARC button In PC source：Set the picture window to full or normal.
Press APC button Select Normal, Clear, Dark, and Theater mode for picture control.
Press SLEEP button Press to select a present time interval for shut off.
Press V-CHIP button Set Parent Control function.
Press C.C button Set the caption of TV programs show on or off.
Press ADD button Add the channel of TV programs in TV source.
Press ERASE button Erase the channel of TV programs in TV source.
multi-channel sound services.
Adjust the bass of audio.
Open the subwoofer function.
sub display disappear.
Bottom Left→Repeat
In Video source：Set the picture window to normal→full→periscope→zoom.
Page 14
6. Disassembly Instructions
1. Face down the LCD-TV :
Face down the LCD-TV on a smooth plane with a soft material to protect the panel faceplate.
2. Base Neck Removal Procedure :
2.1 Remove 2 screws from Neck Cover. (Indicated as “ A “)
Then you could take the Back Cover of neck apart from the LCD-TV
A
3. Base Removal Procedure:
3.1 Remove 4 screws from the Back Cover. (Indicated as “ B ” and “ C ”)
Then you could take Base (assembly) apart from the LCD-TV.
B
C
Page 15
4. Tuner Cover & AV Cover Removal Procedure:
4.1 Remove Tuner Cover. (Indicated as “D”)
4.2 Remove AV Cover before, you should be loose the screw (Indicated as “E”)
E
D
5. Back Cover Removal Procedure:
5.1 Remove 8 screws from the Back Cover. ( Indicated as “ F “and “ G “ )
5.2 Remove a screw from the Tuner Board. (Indicated as “ I ”)
5.3 Take slide of tuner board.
Then you could take Back Cover apart from the LCD-TV.
F
F
G
G
I
Page 16
6. . Right/Left Side Covers and Tuner Board Removal Procedure:
6.1 Remove 4 screws from Slide of AV PCB & left side Covers. (Indicated as “ H ”)
6.2 Remove a screw from the Tuner Board. (Indicated as “ I ”)
6.3 Remove 3 screws from the power case assembly. (Indicated as “ J ”)
Then you could take Slide of AV PCB, Power case, and Left Side Covers Removal.
H
H
J
7 Main PCB Shield Removal :
7.1 Remove 2 screws from Main PCB Shield. (Indicated as “ K”)
Then you could take Main PCB Shield apart from Main Bracket and the PCB Board will be
shown on it .
K
Page 17
8. Main PCB Removal procedure:
8-1 Remove 9 screws from the Main PCB. (indicated “ L “)
Then you could take Main PCB apart from the LCD-TV .
L
9. Panel Bracket Removal procedure:
9-1 Remove 4 screws from the Panel Bracket. (Indicated as “ M ”)
Then you could take Panel Bracket apart from the Front Cover.
M
Page 18
Page 19
(
)
(
)
t
g
7. Block Diagram
ANT
UT01
TV – Tuner
(Philips)
FQ1236 MK3
SIF
Audio
Video
I044
4:1
MTS & Audio Processor
MSP3440G
CV Audio
SV/A V Audio
PC Audio
I010
Audio Amp.
LA4282
(or TFA9843)
10W + 10W
Speaker
Headphone
Subwoofer
CV
SV
AV
I033
V-Chip
Z8612912
I024
PI5V330
I035
3D Comb filter
TC90A65F
(or UPD64083)
VGA
PC / Component Video
AC100~240V 50/60Hz
Interlaced
ressive
Pro
Interlaced
TV/AV
Remote Control
Video Decoder
SAA7118
or SAA7119
ADC
AD9883A
Video Decoder
SAA7118
(or SAA7119)
I001
ADC
I013
Power
Module
I018
I006
I031
I038
HY57V64
I037
De-Interlace
SiI504C
I032
P15V330
IR Pad
Key Pad
E2PROM
+ 5V
+ 24V
RAM
8 bi
24 bit
Sync.
Regulator
I019
Port V(Sub)
Scaler
TP6760
(or TP6761)
Port B(Main)
Port A(Main)
2
I
I012
Micro Controller
C
SM59264
or TP2808
3.3V
2.5V
1.8V
I009
Interface
THC63
LVDM83A
LCD
Panel
23”
I020
RAM
HY57V16
Note: Main Board
PWB-0610-01~04 uses SAA7118、TP6760、TC90A65F。
PWB-0610-11above uses SAA7119、TP6761、UPD64083。
INVERTER
Page 20
8. Troubleshooting Flow Chart
N
g
g
g
g
（1）Power Start NG
Picture
appears
Re-ch
ar
e
No picture
No
Restart and check
sources are
connected
Yes
No picture Appear
Does the LED
light up？
否
Yes
No
Replace I029
Is the Voltage at
否
L067 5V？
Yes
No
Measure of I029
0~0.5V
volt
3~5V
Picture
appears
Picture
appears
Picture
appears
Re-ch
ar
e
No picture
Clean
EEPROM
No picture
Re-ch
ar
e
No picture
No
Panel wire (P005) is
connected correctly?
Yes
Yes
Check if panel
light works?
o
White connector of
No
power Module (8p
or 12p) is connected
correctly?
Yes
Measure white connectors
of 2 sides pin voltage that
are at 3V and 24V
Yes
No
Is LED display
Amber？
Is it entering into
power saving on pc
mode?
Restart signal to
ensure H. V.
sync are not
Yes
Yes
absent
End
否
No
Picture
appears
Replace I012(MCU)
Picture
appears
Replace Main Board
PWB-0610
Picture
appears
Clean
EEPROM
No picture
No picture
No picture
Fix at
factory
Picture
appears
Replace Power
Module, test
again.
No picture
No
Picture
appears
No
discharge white
connector, then measure
voltage again
Yes Yes
Replace Inverter,
test again.
No picture
Check if inverter is
connected correctly.
Picture
appear
No
Rechar
No picture
e
Page 21
(2) Picture abnormal
The Ver. Or Hor .
Sync. does not
hold
in any source
Clean
EEPROM, and
then check the
picture is
Yes
No
Are the cables
attached
firmly at the
LCD Panel
Yes
Replace V901
(LCD panel)
No
Connect the
cables firmly
with the at
interface
Yes
Check side SMD of
No
I019&I020 is welded
correctly?
Yes
After welding,
then check the
picture.
Change main
board (PWB-0610),
Yes
and check picture.
Change Power
Yes
Module, and check
否
No
Yes
No
No
picture
No
Change Inverter
Yes
and check picture
End
No
20
Page 22
Steps to clean EEPROM
1. Press Power key to turn off the LCD-TV.
2. Press Power key quickly to turn on the LCD-TV
and then press the Aspect Ratio key promptly.
3. When “Initial EEPROM” appears on the
screen, on the Clean EEPROM is complete.
Trouble Shooting
1. MCU platform using SyncMos SM59264 or Topro TP2808
2. Label：V30CMTT-U01
3. Check Sum：FDEB H
4. BIOS Version：V30C-D02-TAT-MP 1.0-0311 10
5. EEPROM INITIAL：Power + Channel Up
TAT
V30CMTT-D02
M/P 1.0
´Custom
´Model NO.
´Edition
6. Enter Factory Mode：Power + Menu Key
7. Leave Factory Mode：Power off
8. Self – Test Mode (for Burn in)：Push Menu + Channel Up + Power ON、Key at same time, and
then loose Power On Key first、Keep push Menu and Channel Up Keys for 2 seconds，test pattern
will appear on the screen(Self-Test Mode can’t be disable by disconnecting Power Supply, it must
thru. Power Key).
9. Disable Self-Test Mode：Push Power OFF/On Key
21
Page 23
9. Electronic Circuit Description
9.1 Main Board Circuit
(1) PC signal
Refer to circuit diagram sheet 1 of PWB-0610.
The analog R.G.B video input signals are supplied through the 15Pin D-sub cable
which is terminated at PJ03. These three input signals are approximately 0.7Vpp in
amplitude.
R031、 R032 and R033 give resistance of 75Ω respectively for impedance matching.
These R、G、B video signals are ac coupled via 0.047U capacitor C021、C016 、C013
and then fed into the I001 AD converter (AD6883-140) at Pin54、49 and 43 respectively.
These analog R、G、B video signals are converted to the their digital forms in I001. The
outputs of digital data including 8 bits red、8 bits green、8b bits blue signals are
assigned at Pin70 ~ 77、Pin 2 ~ 9 and Pin 12 ~ 19 of I001，and applied to Port A of I019
(Scaler：Tp6760 ) Hsync & Vsync are applied to I001 (AD9883-140) #30 & #31 and
the processed signal taken from #66 & #64 are fed into I019 (Tp6760) #18、#19..
CLK signal is taken from I001 (AD9883-140) #67 and applied to I019 (TP6760) #156.
The LCD-TV is designed to have the DDC/2B FUNCTIONS. Communication between
the LCD-TV and computer for DDC is via PJ03 (D-sub connector ) #15、#12 which are
defined as SCL、SDA signals. The computer will read out the EDID from the I004
(EEPROM) and the EDID data is written into the EEPROM in the factory during
production.
22
Page 24
CV
(
)
V
(2) AV Signal
Refer to the page 8 in circuit diagram of PWB-0610.
V27CMTT can process 4 different Video signals，including Composite Video
(CVBS)、Separate Video (S-Video ) and Component Video (YUV). Component Video
also includes two types Y Cb/Cr and Y Pb/Pr, and I018,I031 SAA7118 is 16 channels
analog input. There are 4 A/D in it’s I/O port, So it can match this model.
Examples for different of input source signals are listed one by one as follow. (please
refer to the circuit diagram)：
SV
AV
I033
-Chip
Z8612912
I024
PI5V330
I035
3D Comb filter
TC90A65F
or UPD 64083
VGA
ANT
Interlaced
Progressive
Interlaced
TV/AV
PC / Component Video
TV – Tuner
UT01
(Philips)
FQ1236 MK3
I018
Video Decoder
SAA7118
(or SAA7119)
I006
ADC
AD9883A-140
I031
Video SAA7118
(or SAA 7119)
I001
ADC
AD9883A-140
SIF
Audio
Video
CV Audio
SV/A V Audio
PC Audio
I038
RAM HY57V64
I03
De-Interlace
SiI504C
I032
P15V3
I044
4:1
MTS & Audio
Processor
MSP3440G
8 bit
24 bit
Sync.
24 bit
I019
Port
V(Sub)
Scaler
TP6760
Port
B(Main)
Audio Amp.
(or TFA9843)
I010
LA4282
I009
Interface
THC63
I020
RAM
HY57V16
10W +
10W
Speaker
Headphone
LCD
A. TV：
i. TV signals enter from ANT to Pin#1 of UT01 FQ1236 MK3 Tuner. Pin
#14 output Audio MPX signal, while Pin#12 output TV (CVBS) Video signal.
ii. Audio MPX signal does MTS demodulation from I044 (I044 MSP3440G).
It can output Audio signal including Mono 、 Stereo、Sap and so on. Then
through I010 (Audio Power Amp) to Speaker.
iii. After the Video signal to the V-Chip circuit (I025 NJM2244、I033
Z86129、I030 74HC126) to modulate it, output to I031 SAA7118 Video
Decoder (Main) or I018 SAA7118 Video Decoder (Sub) circuit to do
modulation and Video source exchanges for CVBS signal type. Then CVBS
signal changes to the ITU-656 type by I031 or I018 and outputs to I019 Scaler
to process. 8 Bit belongs to Data parts, and H sync, V sync, CLK directly
connect to Pin#162、163、164 of Scaler. Then R、G、B signal respectively output
six bits to panel.
23
Page 25
B. CV (Y Pb Pr )：
Entering from P50 signal, then enters Pin#43、48、54 of AD9883-110 passed by
the matching impedance resister and capacitance. It converts to RGB signal of
YUV by I006 and passes to Port B of I019 by six row-resister RP08 ~ RP12.
Then output to panel.
C. Audio：
The rest of Audio source all connect Audio Processor ( I044：MSP3440 ) to
each left and right voice channels. Controlled by MCU (I012) and selected
through I044, just output one source to Audio Power Amp (I010：LA4232) to
Speaker.
(3) MCU
Microcontroller
Refer to circuit diagrams Sheet 5 of 11.
The microcontroller I012 (SyncMOS SM59246) or Topro TP2808 is running with the
clock based on 14.318 MHz by X003.
C127 and R096 constitute a reset circuit. It properly the necessary active high reset
signal for I012 (Microcontroller) to operator properly. This reset signal is result that is
fed into I012 (Pin#10) to provide the necessary system reset for the proper operation
of I012.
The signal IR- DAT (Pin#15 of I012) is used for Infrared Receiver. If the IR Received
some signal，I012 will send interrupt signal by Pin #2、3 (MSDA、MSCL) to control
any chip.
The signal designated AD0 ~ AD7 (Pin36 ~ 43 of I012) are data signal used for
transferring data between I012 and I019.
The signal TXD and RXD ( Pin#13、11 of I012 ) are used for debugging during
firmware.
I013 (24LC16B) provides necessary non-volatile storage for system operating
variables and parameters. It is controlled by I012 via MSDA and MSCL signal, witch
pulled-up to +5V voltage with R092 and R093 (10KΩ).
(4) Panel interface
Refer to circuit diagrams Sheet 6 of PWB-0610.
The signals of panel interface are all from I019 to the LCD Panel.
The signal FPVCC (Pin#96 of I019) and MMTB3904 (Q003) control the +5V power
to the LCD Panel.
The signals FPBACK and DVD0 (Pin#95、62 of I019 ) are used for the control of
backlight’s On / Off state and Panel luminance.
The signals SHFCLK、PDE、PVYSNC、PHSYC come from Pin#90 ~ 94 of I019, and
then fed into P005. These four signals are used for panel image display controls.
24
Page 26
Pin#A1BLU0 ~ 7、A1GRN0 ~ 7、A1RED0 ~ 7 and B1BLU0 ~ 7、B1GRN0 ~ 7、
B1RED0 ~7 are data output from I019 to P005 and P802( to LCD Panel ). They are
buffered by LP02,LP04,LP06,LP08,LP10,LP12 and filtered associated capacitors.
These outputs are organized into even and odd connectors, each with 18 bits.
9.2 Keyboard Circuit & IR Lens board
The keyboard and IR lens circuit are shown in chapter 10-3 of the circuit
diagrams.
9.3 Inverter Circuit
The inverter board is fed with +24V through P802#1~#5 on Power module and offers
4.1ma (typical ) to each lamp of backlight in LCD panel.
The brightness adjusted in OSD menu is to control the voltage at P802#11 while this
voltage is offered by I019 (Scaler：TP6760)#62.
The range of the voltage is from 0V to 3.3V. If the voltage of P802#11 is 0V, the
screen will get light; if it’s 3.3V, the screen will get dim. It means that the different
voltage will change the lamp current through the inverter to make the screen lighter or
dimmer.
9.4 Power Module
The Power Module circuit shown in chapter 10-6. The Power Module provide +5V
+24V though P802 for whole system.
25
Page 27
10. Circuit Diagram
10-1 PCB Main Board Circuit
26
Page 28
27
Page 29
28
Page 30
29
Page 31
30
Page 32
31
Page 33
32
Page 34
33
Page 35
34
Page 36
35
Page 37
36
Page 38
37
Page 39
38
Page 40
39
Page 41
40
Page 42
41
Page 43
42
Page 44
43
Page 45
10-6 POWER Circuit
44
Page 46
11. PCB Layout
45
Page 47
46
Page 48
47
Page 49
48
Page 50
49
Page 51
50
Page 52
51
Page 53
52
Page 54
53
Page 55
54
Page 56
POWER Layout
55
Page 57
56
Page 58
57
Page 59
58
Page 60
59
Page 61
12. Electrical Part List
Model
part number
TFT Panel
EE
Inverter
PARTS
Power
Module
V23CLTT V27CMTT V30CMTT
LG
LC230W015051253645
(include
Inverter)
panel is
included
HOAU232003
120w
669306605
CMO V270W1
1.5051253641
RA
2.5051253656
RB
(include Inverter)
1.50000100074
2. panel is
included
1.HOAU242001
150W
6693006602
CMO V296W1
1.5051253642
2.
1.5000100069
2. 2. panel is
included
1.6693006602
2.6693006601
3. PHIHONG
150W
NOTE
Tuner
Board
I/O Board
IR Board
Key Board
PWB-0707
5097632500
PWB-0612
5097624511
PWB-0565
5098800637
PWB-565
5098800636
6693006601
PWB-0707
5097632505
PWB-0612
5097624507
PWB-0565
5098800641
PWB-565
5098800640
PWB-0707
5097632506
PWB-0612
5097624508
PWB-0565
5098800643
PWB-565
5098800642
The three
material
numbers can
be the same
The three
material
numbers can
be the same
The three
material
numbers can
be the same
The three
material
numbers can
be the same
Main
PWB-0610
5097624400
PWB-0610
5097624600
60
PWB-0610
5097624601
The three
material
Page 62
numbers can
Board
be the
same , but
MCU
system is
different
5055123800
SPK-251 4-OHM
SPK-251
Speaker
RA
5055123801
RB
5000100072
10W
5055123700
5000100072
4-OHM 10W
5055123700
5000100072
Remote
RA
5052731015
RA
5052731015
RA
5052731015
control
RB
MCU 40MHz
RB
6647021813 6647021813 or Topro
RB
MCU
128KBsync
TP 2808
ME
PARTS
Signal
Cable
Power
Cord
User＇s
Manual
Front
Cover
Back
mos
6647021813
15P L1800mm
5057415248
UL
SVT#18X3C
1.8M BLK
5056705900
5030007009 5030007014 5030007007
#32130 94V0
5642294200
#4002 94V0
5642294300
15P L1800mm
5057415248
UL SVT#18X3C
1.8M BLK
5056705900
#32130
56422942100
#4002 ABS94VO
5642292200
15P L1800mm
5057415248
UL
SVT#18X3C
1.8M BLK
5056705900
#32130 94V0
5642291900
#4002 94VO
5642292000
6647021817
Cover
Base
#3213094HB
5641413800
#3213094HB
5641412700
61
#3213094HB
5641412700
Page 63
13. Mechanical Disassembly
62
Loading...