Xoceco LC30D9, LC40D9 Schematic

COLOR TELEVISION
LC30/40D9
CONTENT
Safety instructions………………………………………………………………………..… Instructions on adjusting and testing…………………………….…….………………… Trouble shooting……………………………………………………….…………………… Method of software upgrading………………………………………….………………… Briefing on LC30/40D9 and its working principle……………………………………..… IC BLOCK DIAGRAM……………………………………………………………..……….
Wiring diagram……………………………………………………………..……………....
Serial NO. of parts……………………………………………………………………….… Identification criteria for the bright spot and dark spot of the LCD screen………..… Troubleshooting guide………………………………………………………………..…… Exploded views…………………………………………………………………………..… Schematic diagram…………………………………………………………………….…..
1 2 6 8 10 12 22 23 23 24 27 32
Attention: This service manual is only for service personnel to take reference with. Before servicing please read the following points carefully.
Safety instructions
1 Instructions
1.1 Be sure to switch off the power supply before replacing or welding any components or inserting/plugging in connection wire
1.2 Anti static measures to be taken (throughout the entire production process!):
1.2.1 Do not touch here and there by hand at will;
1.2.2 Be sure to use anti static electric iron;
1.2.3 It’s a must for the welder to wear anti static gloves.
1.3 Please refer to the detailed list bef ore replacing components that have special safety requirements. Do not change the specs and type at will.
2 Points for attention in servicing of LCD
2.1 Screens are different from one model to another and therefore not interchangeable. Be sure to use the screen of the original model for replacement.
2.2 The operation voltage of LCD screen is 700-825V. Be sure to take proper measures in protecting yourself and the machine when testing the system in the course of normal operation or right after the power is switched off. Please do not touch the circuit or the metal part of the module that is in operation mode.
Relevant operation is possible only one minute after the power is switched off.
2.3 Do not use any adapter that is not ident ical with the TV set. Otherwise it will cause fire or damage to
the set.
2.4 Never operate the set or do any inst allat ion wor k in bad env iron ment such as w et bat hroom, la undry , kitchen,or nearby fire source, heati ng equ ipme nt an d device s or ex posur e to s unlight etc. O therwi se bad effect will result.
2.5 If any foreign substance such as water, liquid, metal slices or ot her matters happens to fall into the module, be sure to cut the power off immediately and do not move anything on the module lest it should cause fire or electric shock due to contact with the high voltage or short circuit.
2.6 Should there be smoke, abnor mal smell or sound fro m the module, pleas e shut t he power of f at once. Likewise, if the screen is not working after the power is on or in the course of operation, the power must be cut off immediately and no more operation is allowed under the same condition.
2.7 Do not pull out or plug in the connection wire when the module is in operation or just after the power is off because in this case relatively high voltage still remains in the capacitor of the driving circuit.Please wait at least one minute befor e t he pulling out or plugging in the connection wire.
2.8 When operating or installing LCD please don’t subject the LCD components to bending, twisting or extrusion, collision lest mishap should result.
2.9 As most of the circuitry in LCD T V set is comp osed of CMOS i ntegrate d circuits, it’s neces sary to pay attention to anti statics. Before servicing LCD TV make sure to take anti static measure and ensure full grounding for all the parts that have to be grounded.
1
2.10 There are lots of connection wires between parts behind the LCD screen. When servicing or moving the set please take care not to touch or scratch them. Once they are dam aged the screen would be unable to work and no way to get it repaired.
2.11 Special care must be taken in transporting or handling it. Exquisite shock vibration may lead to breakage of screen glass or damage to driving circuit. Therefore it must be packed in a strong case before the transportation or handling.
2.12 For the storage make sure to put it in a place where the environment can be controlled so as to prevent the temperature and humidity from exceeding the limits as specified in the manual. For prolonged storage, it is ne cessary to hou se it in a n ant i-moist ure bag an d put t he m altoget her in one place. The ambient conditions are tabulated as follows:
Scope for operation
0----+50 C
Temperature Scope for storage humidity Scope for operation Scope for storage
2.13 Display of a fixed picture for a long time may result in appearance of picture residue on the screen, as commmonly called “ghost shadow”. The extent of the residual picture varies with the maker of LCD screen. This phenonm enon doesn’t represent failure. This “ghost shadow” may remain in the picture for a period of time (several minutes).But when operating it please avoid displaying still picture in high brightness for a long time.
-20----+60 C 20%---85% 10%---90%
3. Points for attention during installation
3.1 The front panel of LCD screen is of glass. Wheng installing it please make sure to put it in place.
3.2 For service or instatallation it’s necessary to use specified screw lest it should damage the screen.
3.3 Be sure to take anti dust measures. Any foreign substance that happens to fall down between the
screen and the glass will affect the receiving and v iew ing effect
3.4 When dismantling or mounting the protective partition plate that is used for anti vibration and
insulation please take care to keep it in intactness so as to avoid hidden trouble.
3.5 Be sure to protect the cabinet from damage or scratch during service, dismantling or mounting.
Instructions on adjusting and testing
The adjustment of LC22K9 excludes 2.30
2.1 Adjusting and calibrating the equipment
PM 5518(video frequency signal generator), K-7253(VGA signal generator),CA210(white balancer)
2.2 Adjustment and calibration procedure
2.3 Adjusting and calibrating the monitor board
Place the monitor board o n the test ing j ig, turn o n th e pow er supp ly and swit ch on the set to s ee if it
2
is normal.
2.3.1 Adjusting the white balance of monitor board
Push the “Rest” key and “OK” key under the cover of the remote control set, repeat the push, enter
the factory menu. Select factory reset to initialize the MONITO R
Input the DVI signal to mo nitor boar d. (K-725 3 ti me339 p attern 63 0 8 gray degree sig na ls, input the DVI signal to socket with 26 cores of monitor board by way of patc h panel). Adjust the intermediate second and seventh gray degree with CA210 white balancer. Preset value of R,G,B CUT to 100,and R,G,B DRV to 150, then, adjust the second gray degree (bright ness: about 9nit) by R,G,B CUT, to set the color coordinates of second gray degree to 270, 283. Adjust R,G,B DRV to set the color coordinate of seventh gray degree to 270 and 283.
Note: Because the values of R,G,B CUT and R,G,B DRV directly determines the values of brightness and contrast at the DVI terminal of monitor board, the white balance should be adjusted according to the preset value strictly. The value after adjusting should be within +/-10 of the preset value.
2.3.2 Calibrating ADC of Monitor After finishing the adj ust ment of 2.3. 1, set t he VG A signal to 1024X768 60Hz mode. Access the
pane signal and connect it to VGA terminal of monitor. Adjust h port of the picture to make the picture fully occupy the screen. Enter the factory menu and select items for ADC calibration and calibrate the ADC according to the indication on the screen.
2.3.3 Adjusting the white balance of monitor:
Input 8 gray degree signals of 1024X768 60Hz mode, push “display” key on the rem ote control
set, adjust brightness and contrast, to set the brightness of second gray degree to 5nit and seventh as 400nit.
For the diagram of adjustment and calibration procedure, see diagram 1
3
V
t
k
f
f
B CUT and B DRV is fixed as 128. Adjust R G CUT,to make second degree of the color coordinate as 270 283. Adjust R G DRV to set seventh degree of the color coordinate to 270
283. Adjust R G CUT and R G DRV again and again, until both of the two gray degrees are at 270 and 283.
2.4 Connect decoder board and push button board with the monitor board verified to be normal (LC-30K9/LC40K9 power is as per connection diagram 203-L30K90-01JL whereas LC-22K9 is as per 203-L22K90-01JL). Af t er pow er on, observe if the display is normal.
Method to enter factory menu: Continuously push key of “VOL+” “Mute”, “V ideo” to enter factory menu.
When the first line of each and every adjusting item is in t he highest brightness push “ENTER” key to select different adjustment items. When VGA and DVI are input, select “mode” and then push
Production of the main board and decoders on the line
General assembly and combined calibration
Connect central signal source, check T functions (station skipping, analog quantity control etc) . Check if the outpu of speaker is normal
Input AV/S and HDTV signal and chec following functions of the terminals
Input VGA signal (one format), check i display is normal under the PC status, and functions (analog control), central o line and field etc.
Check accessories, then packing
Figure 1. Adjustment and calibration procedure
Check if FLASH is written
Check Monitor board
Check decoders in media board
4
“ENTER” key and select three color temperatures 6500K,9300K,12000K. Push “MENU” to quit factory menu.
Notice: Adjustment of Media Box must be performed under the mode --”Nature” of picture.
2.5. White balance adjustment for Media Box TV channel
Continuously press keys of “multi-picture”,”<”,”>”,”Confirm” to Enter the factory menu. Select “Calibration” “white balance adjustment” under the submenu. Connect AV signal(K-7253 TIME381 PATTERN 630 8 degree of gray signal). Use the white balancer to adjust both 2 the brightness and contrast so that the 2
th
the 7
order of brightness 350 nit. Set B CUT and B DRV fixed as 128. Adjust R,G CUT so that the 2 so that the 7
th
order of color coordinates are 270 283. Repeat this adjustment
nd
order of color coordinates are 270 283. Adjust R, G DRV
nd
order of brightness is 5 nit and
nd
and 7th orders. Adjust
for R,GCUT and R,G DRV unt il t he t wo levels of gray degree are both set to 270,
283.
2.6. White balance adjustment for VGA port of Media Box Switch VGA signal to the mode of 1024x768 60 Hz. Access the 8 degrees of gray signal and connect to the VGA port of Media Box. Continuously press keys of “multi-picture”,”<”,”>”,”Confirm” to enter the factory menu. Select “Calibration” “white balance adjustment” under the submenu. Use the white balancer to adjust both 2 so that the 2
nd
order of brightness is 5 nit and the 7th order of brightness 400
nit. Set B CUT and B DRV fixed as 128. Adjust R,G CUT so that the 2
nd
and 7th orders. Adjust the brightness and contrast
nd
order of
color coordinates are 270 283. Set B DRV as fixed. Adjust R,G DRV so that the
th
7
order of color coordinates are 270 283. Repeat this adjustment for R,GCUT
and R,G DRV until the two levels of gray degree are both set to 270,283.
2.7.White balance adjustment for HDTV port of Media Box
After adjustment in 2.4.1 is over, connect HDTV signal to HDTV port of Media Box for adjusting the white balance of HDTV port. Input the 8 degrees of gray signal in the mode of 1280 x 720 60 Hz(720p). Adjust the brightness and contrast so that Adjust the brightness and contrast so that the
nd
2
order of brightness is 5 nit and the 7th order of brightness 400 nit. Continuously press keys of”multi-picture”,”<“,”>“,”Confirm” to enter the factory menu. Select “Calibration” “YpbPr white balance adjustment” under the submenu. Adjust R,G CUT and R,B GRV so that both the 2
nd
and 7th orders of gray color are 270 283. Input 8 degrees of gray signal in the modes of 640x480 60 Hz(480 p)and 1920x540 60 Hz(1080 i)separately. Repeat the adjustment as above until the 2
nd
and 7th orders of gray are both 270 283.
3. Functional inspection
3.1 TV function Enter search menu---auto search, connect ce ntral signal to RF terminal and ch eck if there is missing of station. Input A21 signal and check the function of CCD.
3.2 AV/S HDTV terminal
5
Input HDTV signal to AV/S, and check if it is normal.
3.3 VGA connector Insert VGA signal connector, input 640 x 480@60 Hz VGA format signal, and check if display is normal. If there is interfere on the picture, push the auto-adjust key on the remote control set once more, check if the display is normal.
Trouble shooting
Before servicing please check to find the possib le causes o f the troubles acco rding to t he t able below.
1.Antenna:
Picture is out of focus or jumping Bad status in signal receiving
Maybe broadcast signal itself is not good Check if the outdoor antenna is disconnected. Check if the antenna is correctly oriented.
Fringe in picture Check if the antenna is correctly oriented.
Maybe there is electric wav e reflect ed from hillt op or building.
Picture is interfered by stripe
shaped bright spots
There appear streaks or light color on the screen
Possibly due to interference from automobile, train, high
voltage transmission line, neon lamp etc.
Maybe there is interference between antenna and power
supply line. Please try to separate them in a longer distance.
Check if interfered by other equipment and if interfered
possibly by the equipment like transmitting antenna, non professional radio station and cellular phone.
6
2.TV set:
Symptoms Possible cause
Unable to switch the power on Check to see if the power plug has been inserted properly into
the socket.
No picture and sound Check to see if the power s upp l y of liq uid c rystal TV has been
switched on. (as ca n be indic ated by th e red LED at the front of the TV set)
See if it’s receiving the signal th at is transmitted from other
source than the station
Check if it’s connected to the wrong terminal or if the input
mode is correct.
Check if the signal cable co nnecti on b et we en vid eo f r equency
source and the liquid crystal TV set is correct. Deterioration of color phas e or col or tone Screen position or size is not proper Check is the screen position and size is correctly set up. Picture is twisted and deformed Check to see if the picture-frame ratio is properly set up.
Picture color changed or colorless Check the “Component” or ” R GB” setti ngs of th e liqui d c r ystal
Picture too bright and there is distortion in the brightest area
Picture is whitish or too bri ght in the
darkest area of the picture
No picture or signa l produced from
the displayer if “XXX in
search”appears. There appears an indication ­“outside the receivable scope)
Remote control cannot work properly
No picture and sound, but only
hash.
Check if all the picture setups have been corrected.
TV set and m ake proper adjus tm ent according to the signal types.
Check if the contrast setting is too high. Possibly the output quality of DVD broadcaster is set too high.It maybe also due to improper terminal connection of the video
frequency signal in a certain position of the system.
Check if the setting for the brightness is too high Possibly the brightness grade of DVD player(broadcaster)is
set too high.
Check if the cable is disconnected. Check if it’s connected to the pr oper terminal or if the input
mode is correct.
Check if the TV set can recei ve input sign al. The si gnal is no t
correctly identified and VGA format is beyond the specified scope.
Check if the batteries are installed in the reverse order. Check if the battery is effective. Check the distance or angle from the monitor. Check if there is any obstruct bet ween the rem ote contr ol and
the TV set.
Check if the remote control signal- receiving window is
exposed to strong fluorescence.
Check if the antenna cable is c orrectly connected, or if it has
received the video signal correctly.
7
Blur picture Check if the antenna cable is correctly connected.
Of if it has received the right video signal.
No sound Check if the “mute” audio frequency setting is selected.
Check if the sound volume is set to minimum. Make sure the earphone is not connected. Check if the cable connection is loose.
When playing VHS picture search tape, there are lines at the top or bottom of the picture.
When being played or in pause VHS picture search tape
sometimes can’t provide stable picture, which may lead to incorrect display of the liquid crystal TVIn this case please press “auto” key on the remote control so as to enable the liquid crystal TV set to recheck the signal and then to display correct picture signal
Method of softwar e upgrading
Steps of soft w are upgrading are as follow s:
1. Select a serial connection wire and a VGA connection wire and then connect them by means of a patch panel;
2. Use a serial wire to connect the PC to the patch panel and set TV set to off state;
1. Open the software upgrade file holder and double click
FlashUpgraderNT(use under window 2000/XP/NT)
FlashUpgrader(use under window 98),
The following interfaces will show up after running the pr ogr am:
8
Based on the computer features, set up the serial port(COM Port). Select corresponding serial port
(if it’s unable to FLAS H WRITE, change t o another port) . Baud is se lected to be 115200. Then select Reset Target After Download. Click FLASH pushbutton, it’s ready to run. For other settings, please refer to the Fig. Above (already defaulted by the system, normally no need t o change).
4. Switch on TV set the FLASH wr it e program begins t o run;
5. After FLASH write is over , push but ton “cancel” will beco me flash. Then shut the main power supply
and it’s OK just switch it on again.
Note: Do not shut the power off or turn the TV set on during the FLASH write. Otherwise it may
lead to no way for flash to rewrite.
9
Briefing on LC30/40D9 and its working principle
LC30/40D9 is a multi-media liquid crystal TV broadcast receiver covering all systems. 40/30” liquid
crystal display screen is used as its display device. It has all-system color receiving capability. It is also provided with AV input, S-VHS input, high definition signal port of component Y Pr/Cr Pb/Cb, digital port of DVI, PC VGA input port, AV output port, and earphone output port. Thanks to the two RF input ports provided this TV set can realize browsing function of PIP,POP and multi-pictures both between video signals and between video signal and AV,VGA,DVI signals. It is also equipped with a PCMCIA card reader module, which can be connected with m emory cards like CF,SD and SM, therefore capable of playing the photos taken by digit al camera.
This TV set is also provided wit h a PCMCIA card reader module and can connect memory cards li ke
CF, SD, SM for playing the photos taken by digital camera. This machine adopts the form of set-top-box plus MONITOR. If the set-top-box is removed it is a standard computer displayer. If equipped with the set-top-box it becomes a pow erful T V receiv er. So it’s a flexible ty pe of structu re. The pow er supply is a n externally instal le d power adapter. The software prov ided ca n per for m the con trol ov er t he power su pply. Therefore the power consumption when in standby can be lower than 1 W. It’s really a kind of environmental protection energy saving “green” power supply, and up to the international advanced level.
LC40D9/30D9 liquid crystal TV driving board is mainly composed of three plates which are
respectively video processing plate, digital processing plate and monitor plate. On the video processing plate, RF signal goes through two integrated tuners and produces two routes of color all-TV signals, which are connected together w it h t w o ways of AV signal by way of plug socket and then sent to 3230IC on the digital processing plate for treatment. On this plate, TV,AV and the various ways of audio signals VGA, DVI, YpbPr, YcbCr sent from the plug socket are subject to treatment in MSP3440IC. The processed audio signals are then sent to Monitor plate for amplification treatment.
The digital processing plate in mainly intended to process various signals of TV and AV as well as
VGA, DVI, YpbPr, YcbCr on this plate itself. DVI after processing in SII161IC and VGA, YpbPr, YcbCr after processing in AD9883 as well as TV, AV signals(TTL signal)after processing in Gport 3230 are sent at the same time to PW181 for Sclar treatment. The TV, AV signals that have been processed in Vport 3230 are sent to PW181 for treatment only after deinterlacing treatment in PW1230. The signal processed in PW 181 is subject to conversion into DVI signal in IC SII170 before being output to Monitor plate for treatment.
Monitor plate functions mainly to process DVI signal from the digital processing plate and the VGA
signal from this plate itself. Furthermore, IC LX1722 also perform power amplification treatment for the audio signal that has been processed in the video processing plate.
10
LCD TV System Block Diagram
Media Box
VGA
Y Cr Cb AV IN
S-Video
TV1 V-CHIP RF
RF TV2
SDA SCL
RXD/TXD
power
RS232 L/R
CABLE
MONITOR
DVI monitor Lamp/ power panel
PCMCIA Module
3D Filter uPD64083
TUNER1
TUNER2
SDA555
Mcu
MSP3420
AUDIO
PROCESSOR
M62429
LX1722
Amplifier
Switch
AD9883
ADC
VPC3230 Decoder
VPC3230 Decoder
Z86229 V-CHIP
M62494 SRS
VGA
SDRAM
PW1230
Deinterlace
II C BUS
Image Processor
Scaler
PW131
Mcu OSD
PW181
Image Processor
Scaler
Mcu PIP OSD
FLASH 29LV800TTC
MAX232
CONNECTOR
CONNECTOR
DS90C383
LVDS DRIVER
SiI170
DVI
Box power
DC IN Connector
PANEL
SPEAKER
IC BLOCK DIAGRAM
(1).PW181
IR
IR R C VR (1:0)
RxD, TxD
NM I E X TINT
Interrupt
UART
DVS,
DHS,
DEN,
RGBE
(23:0)
RGBO
(23:0)
Decoders
Memory
OSD/ C PU
Contro er
SDR AM
OSD and C PU
Contro e r
Display Port
Bus
OSD
Mem o ry
Expander
Color Matri x,
Gamma Correction
CLTs, Color Space
OSD
B end
Contro &
DCLK
T m ng
D sp ay
Gener ator
Internal Block Diagram
*For internal cloc k genera torDCLKEXT,
A(19:0),
CPUTM S,
BHEN,
D(15:0),
RA M OE,
RAMWE,
CPUTCK,
CS(1:0),
ROMWE,
PortA
CPUT DI
CPUTDO
RD, WR
ROMOE
(7:0)
Sca er
Imag e
C ock
MCLK DCLK UCLK
Dua PLL
Generator
Watchdog
and T mer s
Memory Out Bus
XO*
XI*
M CLKEX T ,
u
16-b t
T urbo P
Interface
ROM/RAM
Pro cesso r
M cro p r o cesso r B u s
Ser a
2-W re
Memory
Interface
Processor
Image
Sca er
Hor zonta
Frame
Buffer
SDRAM
CRISP
Image
Sca er
Fram e
Buffer
Memory
Contro er
Reset
Bus
Memo ry In
V deo
De nter ac e
No se
Spat a
Reduc t on
Master Reset
(7:0)
PortB
(7:0)
PortC
Por tD(7:0)
GPIO PWM
Por tE(7:0)
Por tF(7:0)
VRGB
Video Port
(23:0)
Color S p ace
Sync Decoder
Converter HDCP
Auto Image Optimizer
FIELD
VVS, VHS,
VCL K , VPEN ,
GCLK, GFBK ,
Graphics Port
GHS, GSOG
GPEN, GVS,
Sync Decoder
GRGB
Color Spa ce
Auto Image Optimizer
(47:0)
Conver ter HDCP
GREF,
GCOAST,
GHSF OUT
GBLKSPL,
12
(2).VPC3230
Y OUT
Output
2D Scaler
Y
Mixer
Y
Color
Formatter
PIP
Decoder
CrCb
OUT
ITU-R 656
ITU-R 601
Mode
Panorama
Cr
Cr
PA L
NTSC
YCOE
Memory
Contrast
Brightness
Cb
Cb
SECAM
FIFO
Control
Peaking
Saturation
CNTL
LL Clock
H Sync
V Sync
AVO
+
Sync
Clock
Generation
C Bus20.25 MHz
2
I
C Bus
2
I
Clock
Gen.
Tint
Y
Cr
Cb
Adaptive
Analog
CIN
Filter
Comb
Front-end
VIN1
PA L
NTSC
AGC
2 ADC
Y/G
Processing
Analog
Matrix
U/B
Component
Contrast
V/R
Front-End
Saturation
Tint
Brightness
FB FB
4 x ADC
FB
VIN2
VIN3
VIN4
VOUT
3
1
RGB/
YCrCb
RGB/
YCrCb
(3).MSP3450G
Loud-
speaker
Subwoofer
Headphone
2
IS
SCART1
SCART2
Loud-
DAC
speaker
Pre-
De-
DAC
Sound
Processing
processing
Sound
Processing
Headphone
Prescale
DAC
Source Select
Select
Output
SCART
DAC
Prescale
ADC
modulator
DSP
Input
SCART1
SCART
SCART2
ADC
2
I S12I S2
Sound IF2
Sound IF1
SCART3
Select
SCART4
MONO
14
(4).UPD64083
EXTDYCO9-EXTDYCO0
DYCO
DCYO9-DCYO0
EXTALTF
select
AYO
ALTF
10-bit
Y-high freq.
YCNR
Y- D A C
coring
4fSC
Y-high freq.
KIL
YCNR
peaking
YNR
Recursive
YCNR
MNNR
ACO
CBPC
10-bit
Y- D A C
Adjustment
C-BPF & delay
SDA
SCL
SLA0
RSTB
CKMD
CLK8
FSCI
FSCOXOXI
BPF
8fSC
8fSC
encoder
PLL
4fSC
C bus
2
I
interface
ID-1
aperture
Y-Vertical
compensation
10-bit
SC -DAC
f
fSC
generator
CNR
Recursive
Error
detection
VCLY
10-bit
Y-ADC
Clamp
AYI
VRTY
Delay
EXTADINS CBPY
VRBY
EXTDYCOS
10-bit
Bias
ACI
mixer
Chroma
C3
filter
Line comb
HH
C-ADC
YCNR
VRTC
VRBC
Motion
detection
filter
Line comb
delay
flame
4-Mbit
filter
Line comb
HH
memory
H
YCNR
MNNR
WCV-ID
decoder
ID-1
decoder
Non-
standard
HV
counter
signal
detection
Sync
separation
CSI
15
(5).SiI-170
MSEN
HTPLG
HDCP
Keys
EEPROM
HDCP
Encryption
Engine
EXT-SWING
TXC+/-
TX0+/-
TX1+/-
TX2+/-
PaneILink
TMDS tm
Digital
Core
encrypted
data
XOR
Mask
control signals
PD
IIC
SDAS
ISEL/RST
Register
-----------------
Configuration
Logic Block
Slave
SCLS
DE
VSYNC
HSYNC
Gen
IDCK-
IDCK+
clear data
Data
Capture
Logic
DE
D[23:0]
Block
CTL3
16
(6).SiI-161
DATA
24
QE[23:0]
24
CTL3
ODCK
QO[23:0]
CTL2
DE
Panel
DATA
CTL3
CTL2
CTL1
SCDT
VSYNC
HSYNC
face
Inter-
Logic
CTL1
DATA
VSYNC
HSYNC
Decoder
SYNC2
SYNC2
CH2
Dat a R eco very
Control
Termination
VCR
Channel
Dat a R eco very
SYNC1
SYNC
SYNC1
VCR
SYNC0
SYNC0
CH1
CH0
Data Recovery
VCR
PLL
VCR
RX2+
PIXS
HS_DJTR
OCK_INV
EXT_RES
RX2-
RX1+
RX1-
7
1
RX0+
RX0-
RXC+
RXC-
PDO
STAG_OUT
ST
(7).SAD555
XRAM
SRAM
16K x 8bit
V
H
character
ROM
16K x 8
BLANK/COR
FIFO
S
B
V
C
ADC
slicer
Acquisition
acquisition interface
C
D
A
4
X
Bus
Arbiter
Display logic
RAM/R OM Interf ace
CLUT
Regs
Display
B
G
R
ADC
Analog Mux
program ROM
128 x 8
WR RD
PSEN ALE
D[0 to 7]
A[0 to 15]
A[16 t o A20]
Memory
stack
128 x 8
Memory
Extension
Core
Interrupt
Extension Unit
Counter 0
Controller
Counter 1
RAM
256X8
ADC
interface
WDT
Capture control
Peripheral
Bus
interface
PWM
8
1
Port Logic
p[0 to 4]
clock &
sync
system
SFRs
UART
(8).LX1722
25
VDD
27
LISN
CLOCK
28 RPWM CPWM
10
SLEEP
1
24
24
26
4
VREF V25
CN
PVDD CP
PVDD
+
SYNC
5
OSC
CLK
220mV
UVLO
&
REFERENCE
5V
Referenc e
6
5V
CURRENT SENSE
Reference
LEAOUT
LEAIN
LAMPOUT
LIN
LIN+
LMUTE
14
13
11
23
LP+
FAULT TIMER
9
8
7
ERROR AMP
INPUT AMP
MUTE
MUTE
MUX
CLK
SQ
RQ
2.5V
OUTPUT
DRIVERS
&
LOGIC
22
21
20
15
17
16
LN+
LN
LP
LFAOUT
LFBK
LFBK+
FEEDBACK AMP
2.5V
19
(9).AD9883
R
AIN
G
AIN
B
AIN
HSYNC
COAST
CLAMP
FILT
CLAMP
CLAMP
CLAMP
SYNC
PROCESSING
AND CLOCK
GENERATION
A/D
A/D
A/D
8
R
OUTA
8
G
OUTA
8
B
OUTA
MIDSCV
DTACK
HSOUT
VSOUT
SOGOUT
SCL
SDA
A
REF
REF BYPASS
SERIAL REGISTER
AND
0
POWER MANAGEMENT
20
AD9883A
(10).PW123
Unit
Display
Deinterlacing
Video
Enhance
Up-Scaling
DGRGB[23:0]
DEN
Digital
(dual pixel)
DHS
DVS
DCLK
DENR
DENG
DENB
Timing
Display
Display Port
COMP
RSET
VREFOUT
VREFIN
ADB
Analog
Port
Display
ADG ADR
CGMS
MWE
MCAS MRAS MCLKFB MCLK MD[15:0] MA[13:0]
Interlaced
YUV
I-Channel
V601
and
Memory
Controller
YUV /
Input
Video
V656
XTALO
DCLKMCLK
PLL and
Line Buffer
Down-
B-Channel
RGB
Scaling
Unit
Input
Memory Unit
Oscillator
Programming Unit
Sync
Decoder
TDI
TCK
TDO
PVVS
PVHS
Component
PVCLK
CREF
SVVS
SVHS
SVCLK
DGVS
DGHS
DGCLK
RESETn
TMS
TRSTn
XTALI
MCURDY
MCUCMD
MCUWR
MCUCS
MCUA[7:0] MCUD[7:0]
2WA2 2WA1
SDA
SCL
21
WIRING DIAGRAM
Serial No. of Parts
203 667 Remote sensor 301-UL40D9-21RA 301WL40D9-04 301-UL40D9-21RA adapter 302-AD12C-03 302-AD12C-03 302-AD13D-02 LCD PANEL 335-40002-00 335-30002-00 335-29002-00 Media box 615-10363-00 615-10364-00 615-10394-00 Video processing 667-L40D9-40 667-L40D9-40 667-L40D9-40 Data processing 667-L40D9-69 667-L40D9-69 667-L40D9-69 MONITOR 667-L40D9-25A 667-L32D9-25 667-L30D9-25
PCMCIA 667-L40D9-90 667-L40D9-90 667-L40D9-90
203-L40D90-10
203-L30D90-11
203-L30D90-12
Identification criteria for the bright spot and dark spot of the LCD screen
Category criteria
One single
Bright
t
spo
Dark
spots
Total defected point ≤8 ≤7 ≤5 4 /
Notes:
1. Definition of defected point (bright spot, dark spot): It is identified as a defected point if its
2. Definition of bright spot: It is identified as a bright spot if it is bright in the state of dark field
3. Definition of dark spot: It is identified as a dark spot if it is dark in the state of white field and
spot
2 neighboring spots
Total No. ≤5 ≤2 ≤5 ≤2 ≤3
One single
spot Two
neighboring
spots
Total No. ≤6 ≤7 ≤5 ≤4 ≤10
area exceeds 1/2 of a single picture element (R,G,B).
and its bright size remains unchanged
its dark size remains unchanged
15" 20" 22" 30" 40" 15" 20" 22" 30" 40"
5 2 5 2 3
2 1 2 1 1
6 7 5 4 10
2 2 2 1 5
4. Definition of two neighboring points: Defects of a group of picture elements(RB,RG,GB).
Q’ty allowed Distance between two spot s
15mm
15mm
10mm
≥5mm
23
TROUBLESHOOTING GUIDE
t
(press remote control or BOX power button,then the red indication lamp power off,in normal condition the lamp change from red to blue.)
NO SCREEN DISPLAY,BACK LIG HT ON
Back light off
no
Check whether power
supply IC
normal
Check whether N205 pin3 the
voltage changing low level
No screen display,back
light off
Check wether back ligh power +14V is normal
normal
Check whether N407 pin 7 the voltage +5V output
Flash write process in N407
no
no
no
Obviate back light
power supply is normal
Check power supply
Replace N205
circuit and IC
24
NO SOUND
Check whether N401 pin2
Check wether N404 pin2 have triangle-waveform
Check wether the front of
no
L404 L405 L406 L407
output waveform (scale1:1)
is normal
pin7 output
output
yes
no
Replace N404
no Check whether audio input
Replace N401
25
DIGITAL BOARD TROUBLESHOOTING GUIDE
r
r
DISPLY “BOX SEARCHNG”
Test N602 waveform from TXC± TX0± ~ TX2±
Test whether N602 powe supply +3.3V
Test wether N302 pin2 pin4 pin5 pin57 waveform
Replace N602
no
yes
yes
no
no
Check path turned 5V into
3.3v
Test whether PW181 powe supply 1.5v; 2.5v; 3. 5v
Test oscillator G501 waveform
Check N503 rest pin5 and pin6
Replace G501
no
Check LDO circuit
yes
yes
abnormalit
Replace N03
normal
26
NO PICTURE
y
x
R
r
R
r
Display “bo searching”
Replace digital board
yes
Check whether displa LOGO in power on
Display “TV searching”
Check wether digital board X2 pin 1 input
Replace VIDEO processing board
Check MONITO board power supply
yes
Replace MONITO board
no
no no
Check whethe monitor board X402 connecting well
Replace powe adapter
MONITOR BOARD
MONITOR works normally,but can’t test box, it maybe cause by the follow ing problem.
MONITOR
normal
no
Check wether X103 pin3 pin12 the voltage 15V
Still can’t test box
yes
Test N301 pin7,8 ,10,11,12,14, 16,17 have signal
normal
Replace N301
Obviateing fault
Connecting box,check X103 pin21 connects GND
Still can’t t e st box
no
OK
Obviateing fault
OK
yes
27
30
LC30D9 EXPLODED VIEWS
31
40
39
38
37
36
35
34
33
32
1
25
24
23
22
21
20
19
26
27
28
29
2
3
4
5
6
7
8
9
10
11
12
13
14
15
18
16
17
Exploded views list(LC30D9)
NO. Name NO. Name
21 stand base cover(righ) 20 stand base 19 stand base cover(left) 40 front cover board 18 stand base board 39 IR receiver 17 terminal panel 38 remote sensor board 16 signal cable supporter 37 speaker socket connector 15 connector cover(left) 36 socket wp4-4 14 connector piece(left) 35 column supporter 13 speaker's back cover(left) 34 speaker grille(right) 12 loudhailer(left) 33 speaker's front cover(right) 11 socket wp2-9c(left) 32 loudhailer(right) 10 speaker's front cover(left) 31 socket wp2-9c(right)
9 shielding board 30 speaker's front cover(right) 8 shielding board 29
screw
7 speaker grille(left) 28 connector piece(right) 6 shielding cover 27 connector cover(right) 5 MONITOR board 26 back cabinet 4 main fixation board 25 column 3 LCD panel 24
screw
2 LED column 23 stand cover 1 acryl panel 22 line buckle
1
LC40D9 EXPLODED VIEWS
2
3
4
5
21
20
19
18
17
16
15
14
13
12
11
10
8
7
9
38
37
36
35
34
33
32
31
6
22
24
23
25
26
27
28
29
30
Exploded views list(LC40D9)
NO. Name NO. Name
21 line buckle 20 stand cover 19 column 18 media box 17 cover 38 speaker 16 speaker's back cover 37 corner connect parts 15 back cover 36 transition parts(A) 14 signal cable cover 35 bearing bracket(small) 13 IR receiver board 34 monitor board 12 pnael connect parts(left) 33 shielding board 11 screw 32 shielding board 10 LED column 31 shielding cover
9 wall connect parts 30 shielding cover 8 transition parts(B) 29 socket 7 pnael connect parts(upper) 28 socket 6 bearing bracket 27 connect piece 5 screw 26 screw 4 speaker's front cover 25 equip weight board 3 front cover 24 screw 2 LCD panel 23 stand ornamental cover
1 acryl panel 22 ornamental piece
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