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SERVICE MANUAL LS07 chassis
LCD TV
SERVICE MANUAL
LS07 CHASSIS
Please read this manual carefully before operation
1
SERVICE MANUAL LS07 chassis
CONTENTS
Chapter One Specification , feature and the Constitution
....................................................................2
Chapter Two Function introduction about the main integrated
circuit ....................................................5
Chapter Three Signal Processing Flow chart .......................15
Chapter Four Typical troubleshooting flowchart and
example...21
Chapter Five Sspare part lists and easy damage part list.......25
Chapter Six The Parameter adjustment of factory repairment
mode.............................................................29
Chapter seven Chassis LCD
TV.................................................35
Attachment:
One Schematic diagraph of LS07 chassis LCD TV
Two Assemble diagraph of LS07 chassis LCD TV
Three Connection diagraph of LS07 chassis LCD TV
2
SERVICE MANUAL LS07 chassis
Chapter One Specification , feature and the Constitution
One The Technical Specification of F Series LCD TV:
The F series LCD TV which adopts LS07 chassis include 5 types of Product:
1 CHD-TM150F7:
Max display format:1024*768(XGA), Audio power output:2*2.0W,
voltage:DC12V, Power adapter voltage :AC 110 240W,50/60HZ,power
adapter Model number:CHA-1204.
2 CHD-TD170F7
Max display format:1280*768(WXGA), Audio power output:2*2.0W,AC input
voltage of inside power Mold piece:AC 110 240V,50/60HZ, the unit sets AC
power Switch ,DVD Mold piece inside.
3 CHD-W170F7
Max display format:1280*768(WXGA), Audio power output:2*2.0W,AC input
voltage of inside power Mold piece:AC 110 240V,50/60HZ, the unit sets AC
power Switch.
4 CHD-TD201F7
Max display format:640*480(VGA), Audio power output:2*2.0W,AC input
voltage of inside power mold piece: AC 110 240V,50/60HZ, the unit sets AC
power Switch ,DVD mold piece inside.
5 CHD-TM201F7
Max display format:640*480(VGA), Audio power output:2*2.0W,AC input
voltage of inside power mold piece: AC 110 240V,50/60HZ, the unit sets AC
power Switch.
Two Main feature
1 RF input ,CATV function
Can receive 470MHZ CATV Programs, can store 236 programs (Program
number display 0 235);
2 AV Audio and AV Video input
Can receive video Signal of PAL NTSC and SECAM system, so you can watch
the programs from VCR ,DV and all kinds of Video-disc player Conveniently,
bring you perfect Audio-visual effect.
3 Y/C component video input
S-VIDEO input, can receive high defintion Y/C component Signal from such as
DVD Conveniently .
4 YPbPr input
can receive high definition YPbPr component video signal from such as DVD
Conveniently . Support format:480I 480P 576I 576P 720P 50/60HZ 1080I
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SERVICE MANUAL LS07 chassis
50/60HZ 1080P 50/60HZ
5 VGA input
As the Terminal display Equipments of computer, it can connect with computer
conveniently. it can connect with Computer audio card by its own Audio
connection line ,so you can listen the audio information from computer.
6 Program lock and child lock function
The function of program lock can lock the programs input password and
Modification, the function of child lock can lock the keys.
7 Timer function
You can set turn on and turn off on time, and power off in 15 min automatically if
no signal input. Automatically enter into save energy mode by itself if no signal
in PC condition, it can be awaken if signal inputs.
8 Blue screen mute noise
In condition of TV AV S-VIDEO and YPbPr, gentle blue screen will be
displayed if no signal input.
9 Chinese/English menu
Adopt the design of Convenient and Simple graphic menu, you can operate
menu more conveniently and more intuition.
10 Save energy function(power management mode)
When TV is used as PC display terminal, and PC has no output signal . The TV
will be power off in about 30 Seconds automatically, and enter into standby
condition. press down Power/P+/P-/ Number key of Remote control or the PC
signal appearance again, the TV will be on automatically.
11 Plug-and-play
The TV works as the terminal Equipments of computer, need not equip install
software it is real Plug-and-Play.
12 Automatic correct
By its automatic correct function ,the LCD TV can bring you the best view.
13.No Flicker no Radiation Green environmental protection
the LCD TV can bring you High quality view, and Avoid Radiation, protect your
eyes, Look after your health.
14.Because of it's Advanced power Management mode, the TV can realize
standby and recall on function.
15.Zoom image function
Support follow zoom function: Full screen mode 4:3 mode 16:9 TFT ,16:9 4
3 TFT Movie mode Sub-title movie mode.
16.Light weight small dimention Low power consumpt
17.Advanced picture quality Strengthen function
Dynamic skin color Correct: Improve distort color in picture, make it Near to real
color.
Black level Extension: blacken the more black area of picture, Raise the Contrast
in Dark Background.
Color Edge correct: Increase the Steep of color signal edge ,make the edge of
color Transition more clearly .
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SERVICE MANUAL LS07 chassis
Brightness edge correct: increase the steep of Brightness signal edge, make
the edge of picture is more clearly.
18.Five degree Intelligence "The gold ratio"
in many kinds of the Combination from Brightness contrast color defintion
Sound area, it can calculate the golden Audio-Video Combination effect.
19.Super fine and inner fairness LCD
20.digital comb filter
21.Headphones input
22.DVD Mold piece inside(only CHD-TD201F7/CHD-TD170F7)
121 Compatible with DVD super VCD VCD CD MP3 etc.
122 Compatible with PAL/NTSC format Disc
123 The high-quality digital audio SDPIF digital audio output will bring you
more really Stereo more high Sound quality more strong surround film
effect.
Cut off the non-suitable content(only limited DVD disc which have play
grade control information)automatically, according to selected play
Grade.(max 8 grade)
124 you can choose 32 kinds of OSD language
125 you can choose 8 kinds of sound language(Note: the Quantity of OSD
language sound language is Decided by the Recorded disc )
Three Electric circuit of the TV
The Europe LS07 chassis LCD TV is composed of Steady voltage circuit
inverter Circuit RF circuit video Strengthen circuit video Processing circuit
Power Enlarge circuit VGA circuit system control circuit and key control circuit.
the block diagraph of circuit Constitute is below:
Four PCB Module introduction
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SERVICE MANUAL LS07 chassis
The Constitute of the PCB is easier than LP03 chassis, all the Signal
Processing are in Main board.
1 Main board Module
Main board Module is the main part of Signal Processing in LCD TV. The input
signal is Converted into uniform digital signal which can be Identified by LCM by
system control circuit. Main board Module contain two parts of signal
processing Module: Philips UOC3 process analog audio and videoo circuit
mainly, MST518 process VGA circuit signal Format transform system control
circuit mainly. the front module can convert the video IF signal and audio IF
signal from tuner into RGB analog signal and audio signal, this part is named
analog audio and video decoding process. The RGB color from UOC is
received by MST518 and accomplish A/D convertion , output suitable digital
color signal to Drive circuit of TFT . 8051 Processor inside UOC is responsible
for co-operation the each part of works in system, and Respond to user
operation which is operated on Control panel(key-press panel Module).
2 Key board Module
It is composed of 7 function keys. the user can operate the LCD TV
conveniently by using this Module.
3 Remote control receiving board Module
It is composed of a work indicator light and a remote receive head. the user use
the remote control box by this module can operate the LCD TV conveniently
and know the LCD TV work condition.
4 Earphone output board module
It is composed of a earphone outlet, user can Listen to by earphone
conveniently.
5 Inverter board module(include inverter circuit)
The function of the inverter is supply power to light tube in TFT , and lighten
the back lamp Unit of TFT moldule, so the user can see the image on TFT.
Chapter two The function introduction LS07 chassis
LCD TV's main IC
One The main IC of LS07 chassis
serial
Name model Main function
number
1 A1 TAF5-C2IP1RW RF tuner
2 U8 U21 TDA1517AWT Audio amplifier
3 U3 MST518 AD converter and format change
4 U2 UOC(TDA15063H) Video decode and MCU control
5 Q9 Si2311DS MOS switch
6 U11 U12 IRF7316 MOS switch
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SERVICE MANUAL LS07 chassis
7 U19 NTMS10P02 MOS switch
8 U23 LM2596-5.0 Liner voltage IC
9 U1 24LC21A EEPROM(save display parameter information)
10 U4 24LC32A EEPROM save user control information
11 U6 U20 PI5V330A Video switch
Two The function introduction of main IC
1. MST518 high integration chip
MST518 is a high performance high integration image processor which is
designed for LCD, it can support SXGA format(1280*1024).it integrates a group
of AD converter high quality format transform system OSD generator output
clock generator multiple format output display interface(support TTL LVDS
RSDS)
MST518 feature:
Have high quality Expand tranform and compress transform, can output XGA
format signal
Integrated LVDS circuit inside
8 bit high quality ADC inside
Double VGA input, Software switch
Support ITU-656 format signal input
Support H/V sync composite sync green composite sync input, and
detect automaticlly by itself
Programmable 10 bit Gamma correct, the brightness and contrast is
adjustable
8 color 256 Character OSD
Built-in DDC circuit inside
Low standby power
Support TTL double LVDS signal output, Software switch
MST518 pin function:
And CPU interface
Pin Pin name Pin function
33 HWRESET Hardware reset high voltage enable
82 CS Chip select signal of three-wire serial bus
83 SDA data signal of three-wire serial bus
84 SCL clock signal of three-wire serial bus
85 INT interrupt
98-91 AD [7:0] Parallel bus the chassis is not used
125 BUSTYPE Bus type select
Analog Interface
38 HSYNC0 Analog Horizontal sync signal input channel 0
39 VSYNC0 Analog vertical sync signal input channel 0
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SERVICE MANUAL LS07 chassis
40 HSYNC1 Analog Horizontal sync signal input channel 1
41 VSYNC1 Analog vertical sync signal input channel 1
78 RMID Scaler internal reference. voltage
79 REFP internal ADC decouple
80 REFM internal ADC decouple
75 RIN0 Analog red signal input channel 0
74 RIN0M Analog red signal input channel 0 re.grounding
voltage
73 SOGIN0 Green sync signal input channel 0
72 GIN0 Analog green signal input channel 0
71 GIN0M Analog green signal input channel 0 re.grounding
voltage
70 BIN0 Analog blue signal input channel 0
69 Analog blue signal input channel 0 re.grounding
BIN0M
voltage
66 RIN1M Analog red signal input channel 1 re.grounding
voltage
65 RIN1 Analog red signal input channel 1
64 Analog green signal input channel 1 re.grounding
GIN1M
voltage
63 GIN1 Analog green signal input channel 1
62 SOGIN1 Green sync signal input channel 1
61 Analog blue signal input channel 1 re.grounding
BIN1M
voltage
60 BIN1 Analog blue signal input channel 1
55 REXT Outside connect 390 with 3.3V
LCD Interface
145 OCLK Clock output
146 LDE enable signal
144 LVSYNC vertical sync output
143 LHSYNC Horizontal sync output
138 LVA0M LVDS output 0
137 LVA0P LVDS ouput 0+
136 LVA1M LVDS output 1
135 LVA1P LVDS ouput 1+
134 LVA2M LVDS ouput 2
133 LVA2P LVDS output 2+
128 LVA3M LVDS output 3
127 LVA3P LVDS ouput 3+
132 LVACKM LVDS clock signal ouput
131 LVACKP LVDS clock signal ouput +
26-23,18-15 RB[7:0] TTL red signal channel
14-11, 8-5 GB[7:0] TTL green signal channel
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SERVICE MANUAL LS07 chassis
4,3,154,153,150-147 BB[7:0] TTL blue signal channel
GPIO Interface
87 GOUT1/PWM1 PWM output 1
86 GOUT0/PWM0 PWM output 0
2 BYPASS Outside connect filter capacitor
29 DDC_DAT Analog interface DDC data
30 DDC_CLK Analog interface DDC clock
31 DDCROM_CLK DDC ROM clock
32 DDCROM_DAT DDC ROM data
34 XIN Crystal oscillator signal input
35 XOUT Crystal oscillator signal output
Power Pins
48, 54, 58, 77 AVDD A/D convert power supply
56 AVDD_PLL PLL power supply
36 AVDD_MPLL MPLL power supply
10, 22, 88, 99, 111,
VDDP Digital signal output power supply
129, 139, 151
19, 102, 114, 142 VDDC Digital circuit power supply
1, 9, 20, 21, 37, 42,
45, 51, 57, 59, 76,
81, 89, 100, 101, GND Digital circuit ground
112, 113, 130, 140,
141, 152
2. TDA15063H introduction:
The third-generator super integrated circuit UOC III which designed by
Philips company recently integrates with video decode 2D comb filter high
quality audio transacting technique, suitable with the European teletext
technique and suitable with US closed caption and V-chip function compatiable
with single series IC. The series of UOC III have high integraty,besides
completing the Processing of all small signal(IF signal demodulation, video
decode ,H/V signal, sound DSP),and integrate all the MCU function. it has
many Advantages ,example: the compact circuit good performance simple
craft , ect. it match with company's high performance price ratio and high
product efficiency demandings. it is suitable for 4:3 or 16:9 50/60HZ and
A100/120HZ TV system, the main characteristic below:
Multi-system IF demodulation analog video decode
Comb filter internal
Support 4:3 16:9 display format
4 CVBS or 3 Y/C input,1 CVBS output,2 YcrCb/2 RGB input
4 AV audio input,1 AV adjustable audio volume output
Volume auto level control circuit
Global FM demodulation
9
SERVICE MANUAL LS07 chassis
Picture quality enhancement of dynamic peak value control skin color
correct Gamma correct Black level extension,etc
Can turn down horizon and vertical scan part output H/V sync. signal to
Scaler
128K Flash Memory inside, support program on line
Automatic Y/C signal identify
TDA15063H pin function:
pin Pin name Pin function
1 VSSP2 Grounding
2 VSSC4 Grounding
3 VDDC4 +1.8V
4 VDDA3 +3.3V
5 VREF_POS_LSL +3.3V
6 VREF_NEG_LSL+HPL 0V
7 VREF_POS_LSR+HPR +3.3V
8 VREF_NEG_HPL+HPR 0V
9 VREF_POS_HPR +3.3V
10 XTALIN crystal oscillator input
11 XTALOUT crystal oscillator output
12 VSSA1 Grounding
13 VGUARD/SWIO Protecting voltage input or I/O
14 DECDIG DECDIG signal input
15 VP1 +5V
16 PH2LF The second grade horizontal phase lock filter
17 PH1LF The first grade horizontal phase lock filter
18 GND1 Grounding
19 SECPLL SECAM PLL decouple
20 DECBG Inside reference voltage decouple
21 EWD/AVL VDD5A voltage input
22 VDRB Tv vertical sync signal output
23 VDRA vertical sync output
24 VIFIN1 VIFinput 1
25 VIFIN2 VIFinput 2
26 VSC Outside connect vertical ramp capacity
27 IREF Re.current input
28 GNDIF IF grounding
29 SIFIN1 SIF input 1
30 SIFIN2 SIF input 2
31 AGCOUT tuner RF AGC control voltage output
32 EHTO overvoltage protection input
33 SSIF MUTE control signal input
34 AUDIOIN5L Av left track signal input
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SERVICE MANUAL LS07 chassis
35 AUDIOIN5R Av right track signal input
36 AUDOUTSL SCART/CINCH left track output
37 AUDOUTSR SCART/CINCH right track output
38 DECSDEM Track demodulator decouple
39 QSSO Deemphasis capacitor
40 GND2 grounding
41 PLLIF IF_PLL filter
42 SIFAGC Sound intermediate frequency auto gain control
43 IFVO IF demodulation video output
44 FMRO Fm broadcast output
45 VCC8V The supply voltage of Sound switch
46 AGC2SIF The second sound intermediate frequency auto gain
control
47 VP2 +5V
48 IFVO The video output of Choose channel
49 AUDIOIN4L HD signal left track audio output
50 AUDIOIN4R HD signal right track audio output
51 CVBS4/Y4 S-video luminance signal input
52 C4 S-video chroma signal input
53 AUDIOIN2L PC signal left track audio input
54 AUDIOIN2R PC signal right track audio input
55 CVBS2/Y2 AV CVBS signal input
56 AUDIOIN3L Inside DVD module left track audio input
57 AUDIOIN3R Inside DVD module right track audio input
58 CVBS3/Y3 Inside DVD module brightness signal input
59 C2/C3 Inside DVD module chroma signal input
60 AUDOUTLSL Main channel left track output
61 AUDOUTLSR Main channel right track output
62 AUDOUTHPL Earphone channel left track output
63 AUDOUTHPR Earphone channel right track output
64 CVBS/PIP CVBS/PIP output
65 SVM Scan modulate output
66 FBISO flyback input/sandcastle output or composite H/V
timing output
67 HOUT Horizontal sync signal output
68 VSScomb Grounding
69 VDDcomb +5V
70 VIN V signal input
71 UIN U signal input
72 YIN Y signal input
73 YSYNC Y signal input for Sync separate
74 YOUT Y signal output
75 UOUT U signal output
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SERVICE MANUAL LS07 chassis
76 VOUT V signal output
77 INSSW3 RGB/YpbPr insert identify signal input
78 R/PrIN3 R/Pr signal input
79 G/YIN3 G/Y signal input
80 B/PbIN3 B/Pb signal input
81 GND3 grounding
82 VP3 +5V
83 BCLIN beam current limiter input
84 BLKIN Black current input
85 RO R basic color signal input
86 GO G basic color signal output
87 BO B basic color signal output
88 VDD3 +3.3V
89 VREFAD_NEG 0V
90 VREFAD_POS +3.3V
91 VREFAD Audio ADC re.voltage
92 GNDA grounding
93 VDDA +1.8V
94 VDD3A +3.3V
95 VSSADC grounding
96 VADC +1.8V
97 INT0 Remote control signal input
98 P10/INT1 DPF clock line
99 P11/T0 DPFdata line
100 VDDC2 +1.8V
101 VSSC2 grounding
102 P04/12SWS MST reset signal
103 P03/12SCLK HD_Pc select control signal
104 P02/12SDO2 Power Amplifier standby control signal
105 P01/12SDO1 TV_DPF select control signal
106 P00/12SDII/O Turn on control signal
107 P13/T1 MST chip select signal
108 P16/SCL UOCI2C bus clock line
109 P17/SDA UOCI2C bus data line
110 VDDP +3.3V
111 P20/TPWM Red indicator light control signal
112 P21/PWM0 green indicator light control signal
113 P22/PWM1 TFT power supply control signal
114 P23/PWM2 Inside DVD module power supply control signal
115 P30/ADC0 Reserve IO port
116 P31/ADC1 Earphone insert identify signal input
117 VDDC1 +1.8V
118 VDD18 +1.8V
12
SERVICE MANUAL LS07 chassis
119 P32/ADC2 DVD key-press signal input
120 P33/ADC3 TV key-press signal input
121 VSSC grounding
122 P24/PWM3 Background control signal output
123 P25/PWM4 SAW filter control signal
124 VDDC3 +1.8V
125 VSSC3 grounding
126 P12/INT2 MST interrupt signal input
127 P14/RX MST data line
128 P15/TX MST clock line
TDA15063H inside block diagram
2 TDA9178 introduction
TDA9178 is a analog signal processor with standard YUV input and output
interface .It provid three main process function: luminance vector, color
vector and spectrum process. It can finish comprehensive picture improving
function independently. The characteristics of the TDA9178 are below:
Luminance Transient Improvement (LTI), Colour Transient
improvement (CTI)
Variable gamma control
13
SERVICE MANUAL LS07 chassis
Self-suitable black level extend control
Skin color correction, green intensity ,blue extend
Noise measurement and reduced noise process founction
Line Width Control (LWC)
TDA9178 PIN DESCRIPTION:
Pin Pin name Function
1 sandcastle input sandcastle input
2 not connected Grounding
3 ADC input 1 A/D convertor input 1
4 ADC input 2 A/D convertor input 2
5 ADC input 3 A/D convertor input 3
6 luminance input Y input
7 address selection input I2C address choose input port
8 U signal input U input
9 V signal input V input
10 test pin Grounding
11 serial clock input (I2C-bus) I2C bus clock signal
12 not connected Not connected
13 not connected Not connected
14 serial data input/output I2C bus data signal
(I2C-bus)
15 decoupling digital supply connect decouple capacitor external
16 V signal output V signal output
17 U signal output U signal output
18 ground Ground
19 luminance output Y signal input
20 supply voltage Supply power
21 SCAVEM output Scan velocity modulate output
23 not connected Grounding
24 not connected Grounding
TDA9178 inside block diagram:
14
SERVICE MANUAL LS07 chassis
3 TDA1517AWT brief:
The TDA1517ATW is an double channel class-AB power amplifier
contained in a plastic heat sink thin shrink small outline package
(HTSSOP20). The device is primarily developed for multimedia
applications.
Outside circuit is simple
Mute standby is controllable
Temperature protect circuit
Low noise switch
Constant gain
TDA1517 PIN DESCRIPTION:
Pin Pin name function
3 non-inverting input Audio input
5 supply voltage ripple rejection Bias circuit filter
8 9 Output Audio output
12 13 N.C. Not connected
15 16 supply voltage 12V power supply
17 mode select switch Work mode select
18 inverting input Reverse input terminal connect capacitor to
ground
15
SERVICE MANUAL LS07 chassis
1 2 4 6 7 GND ground
10 11 14
19 20
TDA1517 inside block diagram:
Chapter three Signal Processing Flowchart
16
SERVICE MANUAL LS07 chassis
This chapter mainly introduces analog signals process video intensify process
TV system control process TV supply system of the Europe LCD TV.
One Analog signals process
1. IF/RF process
Completed by TAF-C21P1 RF tuner, output IF signal.
The Function of RF tuner is below:
Pin symbol function
1 AGC Auto gain control voltage
2 TU The TV do not connect
3 ADD ground
4 SCL I2C bus clock
5 SDA I2C bus data
6 BM +5V power supply
7 BM +5V power supply
8 NC Not connected
9 BTL +32V power supply form 0 32V tune voltage
10 NC Not connected
11 IF IF signal output
2. Image and sound process
UOC chip receives the IF signal seperated from SAW , detect and decode.
Output RGB color analog signals from the 85 86 87 pin respectively. Output
the main channel L R audio signal from 60 61 pin. Output earphone channel L
R audio signal from 62 63 pin. additional, Part number U7,TDA9178 complete
the enhancement of quality of the picture ,by the output 74 75 76 pin Of UOC
and the input 70 71 72 pin, combined with UOC to form a loop circuit.
Further, AV S-Video YC signal of inside DVD(some types of TV have not) is
also decoded inside of UOC chip, switch internal UOC with TV input and output
a RGB color analog signal, send it to back-end process.
Two Digital signal process
The analog RGB signal output from UOC and RGB signal output from DFP are
switched and selected by a PI5V330A,input it into the 65 63 60 pin Of MST518.
The RGB signal output from computer and HD-YpbPr signal are switched and
selected by another PI5V330A,input into the 75 72 70 of MST518.This two
channel RGB signal are switched inside MST518,then AD converter, video
format transition, at last output digital color signal which is suitable for TFT drive
circuit. MST518 process the pixels ratio converting of input video signal the
image auto optimization process, then process memory buffer scaler chroma
matrix circuit chroma look-up table chroma space gain, etc. Output
corresponding standard physical resolution digital color signal and
corresponding sync, clock signal to TFT, control the TFT to display image
correctly.
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SERVICE MANUAL LS07 chassis
Three TV power supply system:
1. The supply power system of the main IC is below:
12V:the unit main power supply
+34V:RF tuner tune voltage
VCC5: stable and constant +5V power supply
VCC5A: +5V power supply software can turn off
V3_3D:UOC digital part supply power supply
V1_8V1:UOC digital part constant supply power supply
V1_8V2:UOC digital part power supply can be turned off
V2_5M:MST518 digital core supply power supply
V3_3M:MST518 supply power supply
2. The constitute and distributing of the TV
U8
12V LM2596- L3 VCC5
5.0
C188
U18 Double +32V
7805 voltage
VCC5A
PWRON
TO INVERTER
U17
12Va TO TDA9178
7808
VPO
Fi l t er
VAD
Fi l t er
U14
VPLL
LM1084_3 V3_3M Fi l t er
PWRON . 3V
VCC5_SW VDPLL
IRF7316 Filter
U11 U15
LM1117_2 V2.5M VDD
VCC5 Filter
. 5V
U13 U22
V3_3D V1_8V1
NCP1117 N 1117D
PC
Q9
NTMS10 V1_8V2
P02R
V3_3M FB39 U19
VCC5 FB40 NTMS10 VLCD
12V FB41 P02R
U23
12V LM2596- L6 TO DPF OR DVD
5.0
C294
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SERVICE MANUAL LS07 chassis
4. The main element in mainboard and location of socket and definition
25 10
A
11
N
12
8
13
14
M
K
15
7
16
B J
17
6
L 18
5 19
20
D
C 22
O 21
E
4
F
I 23
3
24
G H
2
1
19
SERVICE MANUAL LS07 chassis
Socket definition
number name Connect object Function description
1 JP1 Connect socket +12V, +12V, GNG, GND(use when inside power supply
plank JP2 not use )
2 JP2 Connect adapter +12V, GND, GND use when outside connect adapter
JP1not use
3 J8 Connect outside VGA audio
input
4 J1 Connect outside VGA input
5 J3 Connect outside HD-YpbPr
input
6 J4 Connect outside HD audio
input
7 J2 Connect outside S-video
signal input
8 J20 Connect outside AV input
9 J9 Connect inside DVD signal
input
10 J21 Connect inside DVD signal
input
11 J7 Connect inside DVD K Look circuit diagram the second pin is 3.3V
panel
12 J12 Connect earphone output
panel
13 J14 Connect speaker
14 J13 Connect speaker
15 J6 Connect TV K panel Look circuit diagram the second pin is 3.3V
16 J5 Connect remote control Look circuit diagram the fifth pin is 3.3V
17 J11 UOC debug socket
18 J10 DPF digital photo-frame
signal input
19 J17 Connect display screen AU 20",15"
TTL screen
20 J16 Connect display screen SAMSUNG 15",17"
LVDS screen
21 J22 Connect display screen LG 20",17"
TTL screen
22 J15 MST518 debug socket
23 J19 Supply DVD or DPF power Look circuit diagram the first second third pin are 3.3V
24 J18 Connect inverter +12V, +12V, poor light switch GND, DND,GND
Explain of Main element
20
SERVICE MANUAL LS07 chassis
No. name element Function description
A A1 RF tuner TAF5-C21P1RW RF input, IF output
B U2 UOC(TDA15063H) Video decode and MCU control
C U3 MST518 AD converter and format transition
D U20 PI5V330A Video switch on/off
E U6 PI5V330A Video switch on/off
F U11 IRF7316 MOS switch
G U9 LM2596-5.0 Linear voltage IC
H U23 LM2596-5.0 Linear voltage IC
I U19 NTMS10P02 MOS switch
J U21 TDA1517AWT Audio power amplifier
K U8 TDA1517AWT Audio power amplifier
L U4 24LC32A EEPROM(store user control information)
M Q9 Si2311DS MOS switch
N U12 IRF7316 MOS switch
O U1 24LC21A EEPROM(store display parameter information)
Chapter Four Typical troubleshooting flowchart and
example
1 Typical troubleshooting flowchart
1 not anything(haven't sound ,haven't picture, haven't indicator light),and not
respond key-press remote control.
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SERVICE MANUAL LS07 chassis
No answer,no key
press,no remote control
NO Is outside adapter(or inside) YES
output 12V normal?
The connection of
Mend or change Main board and key
adapter press ,remote plane is
YES reliable or not? NO
Is U13 U22 output Reset the connect
port voltage normal? lines
NO YES
Check U13 U22 Check each supply power pins
Outside circuit
voltage of U13 U22 output to
U2 are reliable or not?
YES One pin has no voltage
1 check outside parts of an
apparatus of supply power pin .
Change U2
2 check the jointing is OK or
not.
2 Have sound not picture, indicator light work normally
indicator light work,but black screen
when pressing down the power supply
key
Observe back lamp is on or off
YES NO
U13 U22 output voltage Cheeck inverter supply
is normal or not? power voltage and
connect line
NO YES
Check U13 U22 Check each supply power pin voltage
Outside circuit
which output from U13 U22 to U2 is
normal or not?
YES One pin no voltage
1 check supply power pin outside
Change U2 parts of an apparatus
2 check the jointing is OK or not
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SERVICE MANUAL LS07 chassis
3 White screen: the reason of the troubleshoot is the signal electrode
electrode haven't working voltage. The TFT is always in transparent condition,
so the whole screen is in white raster.
VLCD of screen socketJ16(J17 J22) in
main board is normal or not?
NO YES
Check Q25 U19 FB39
Check the jointing of screen socket in main
FB40 FB41, ect parts of an
board is OK or not?
apparatus
NO YES
Switch signal source,use the
oscillograph to check the signal input Patch jointing
or not
YES NO
Check PCB copper aluminium Check U2 outside circuit is normal or
connect line not ,change the fault ones.
(4) Picture abnormal color abnormal short of color
Observe the picture is different in one
condition by the mode of switch signal
source
TV AV condition picture
HD VGAcondition picture
different all appear picture different
different
C heck U and i t s
20 Check the jointing of screen
Check U and i t s
6
out si de ci r cui t , check out si de ci r cui t i s
socket J16 J17 J22 in
t he Q Q Q i s
12 14 15 main board is OK or not,the
nor m or not
al
nor m or not
al connection is OK or not
normal normal normal
Check FB1 FB2 FB3 Check U2 outside
Check the output of 85th
FB4 FB5 inductance are circuit is normal or
86th 87th pin of U2
normal or not not,change fault ones
23
SERVICE MANUAL LS07 chassis
2 The example of service
Example 1 Can't turn on the TV
Troubleshoot phenomenon: after connect power supply and turn on the
power supply ,the "changhong "logo will not appear on screen. Press the key or
use the remote control, the TV has no reflect, no display and black screen.
The process of maintenance : remove the plug of adapter output, measure
adapter output voltage is +12V,the adapter works normally. check the
connectiom with key-press panel remote control panel and mainboard. if it is
ok, the problem must be MCU not work. First check supply power of U2 chip.
Connect power supply, then measure the voltage of the 2 4 pin of
U13NTMS10P02 is 0.2V,and over-heat , the reason must be short circuit of
power supply backend You should remove the plug quickly, otherwise the
chip must be bad. Use the multimeter to measure confirm it is short circuit to
ground. the places which connect U2 with 3.3V voltage are so many, you
should disconnect and measure it one by one. when you disconnect the C68,if it
is normal,C68 grounding Short circuit.
Example 2 No picture in VGA mode
Troubleshooting phenomenon: in TV/AV mode ,the image and sound is ok,
PC (in VGA mode) is no picture, but have state icon.
The process of maintenance: first check the signal source, signal socket
plug are ok or not. Because during switch the mode, the image display
normally in non-PC mode ,it is proved that the backend image public
processing channel is ok, namely U3MST518 and backend image signal
processing circuit work normally. In PC mode, measure the arbitrary pin of
4,7,12 pin ,image date terminal of U6P15V330A by oscillograph. there are
no waveform, change U6P15V330A and the Troubleshooting phenomenon
disappear.
Example 3 No picture in VGA mode and the "signal beyond boundary" is
appeared on screen.
Troubleshooting phenomenon: no picture in VGA mode and the "signal
beyond bound" is appeared on screen. in TV/AV mode, image sound is ok.
The process of maintenance: first check the signal output from the signal
source is not standard or beyond the resolution which is supported by TFT.
except of the two cases, the phenomenon comes from the TFT display. Under
general circumstance it is caused by the abnormal of the horizon sync
impulse ,vertical sync impulse of VGA signal. Inspect the 38th 39th pin of U3
by oscillograph, find the magnitude of horizon sync impulse is below the
normal, measure the waveform of 13th pin of VGA J1 ,if it is ok, so maybe
resistance of the R23 will be largen, measure the resistance of R23 is 10K
,but the rating resistance is 1K , so it is obvious that the magnitude of
horizon sync. impulse is attenuated too large caused by value of couple
24
SERVICE MANUAL LS07 chassis
resistance R23 become large. So the pixel clock inside of the MST518 can not
vibrate, result in the A/D converter of MST518 internal can not work normally .
so appear no picture in VGA mode and "signal beyond boundary" on TFT
screen.
Example 4 Can control TV by remote control, but can not control TV by
key-press panel
Troubleshooting phenomenon: image sound is ok under any source, use
remote control to operate each function is ok, but can not control by using the
key-press panel, failure completely.
The process of maintenance: first check the socket of J6 on mainboard ,the
solder and touch of connector are ok or not. if it is ok, check the key-press
panel ,measure each resistance, find R1 open circuit, change it .
Example 5 The image is ok after turn on the TV, but left speaker has no
sound output
Troubleshooting phenomenon: the image is normal in TV mode, but the
left speaker has no sound output, using remote control to operate ,each
function is ok. use AV PC audio input ,is still no sound output.
The process of maintenance: measure the waveform from 60th pin of UOC
by oscillograph, according to signal flowchat, measure R227 R157 U8 C130
one by one, and observe the waveform is ok or not, find the back end of C130
have not waveform, change C130 and troubleshooting dissappear .
Chapter Five Spare part lists and easy damage
part list
CHD-TD170F7
Material name type module NO. Material code remark
Face frame JUJ8.074.036 8807400360J
Suspend screen JUJ8.640.017 8864000170J
Back cover JUJ8.074.037 8807400370J
base JUJ8.070.012 8807000120J
Accessories bag JUJ6.479.049 8647900490J
Mainboard Samsung
groupware JUJ6.690.032-5 8669000325J screen use
Mainboard LG screen
groupware JUJ6.690.030-11 86690003211J use
DVD drive TDR-085 59C11060850
Decode panel
groupware JUJ6.693.013 8669300130J
Remote control JUJ6.694.016 8669400160J
25
SERVICE MANUAL LS07 chassis
panel groupware
Key-press panel
groupware JUJ6.694.015 8669400150J
DVD touch film
JUJ6.618.004 8661800040J
key-press
Earphone panel
groupware JUJ6.695.002 8669500020J
Commutator
groupware JUJ6.691.007 8669100070J
DVD output
panel groupware JUJ6.693.012 8669300120J
Samsung
TFT LTM170W1-L01 68219601701 screen use
LG screen
TFT LC171W03 68211710305 use
Samsung
inverter INV17-4505 59324125010 screen use
LG screen
inverter INV17-6506 59324165060 use
Dynamoelectric
speaker Y2898-01-5W-4 56231105042
Remote control KLC5B 8201803760L
Inside power
supply module FSP084-1CD02C 67128084025
CHD-TD201F7:
Material name type module NO. Material code remark
Face frame JUJ8.074.030 8807400300J
Suspend screen JUJ8.640.018 8886400180J
Back cover JUJ8.074.033-1 8807400331J
base JUJ8.070.012 8807000120J
Accessories bag JUJ6.479.040 8647900400J
Mainboard AU screen
groupware JUJ6.690.032-3 8669000323J use
Mainboard LG screen
groupware JUJ6.690.032-8 8669000328J use
DVD drive TDR-085 59C11060850
Decode panel
groupware JUJ6.693.013 8669300130J
Remote control
panel groupware JUJ6.694.016 8669400160J
Key-press panel
groupware JUJ6.694.015 8669400150J
26
SERVICE MANUAL LS07 chassis
DVD touch film
JUJ6.618.003 8661800030J
key-press
Earphone panel
groupware JUJ6.695.002 8669500020J
Commutator
groupware JUJ6.691.008 8669100080J
DVD output
panel groupware JUJ6.693.011 8669300110J
TFT A201SN01 68219020110 AU screen
TFT LC201V02 68212010235 LG screen
AU screen
inverter INV18-605D 59324106054 use
Lg screen
inverter INV20-606A D 59324126061 use
Dynamoelectric
speaker
Y38106-01-5W-4 56231105043
Remote control
KLC5B 8201803760L
Inside power
supply module FSP084-1CD02C 67128084025
CHD-W170F7:
Material name type groupware number Material code remark
Face frame JUJ8.074.036 8807400360J
Back cover JUJ8.074.037-2 8807400372J
base JUJ8.070.012 8807000120J
Accessories bag JUJ6.479.047 8647900470J
Mainboard Samsung
groupware JUJ6.690.032-1 8669000321J screen use
Mainboard LG screen
groupware JUJ6.690.032-10 86690003210J use
Remote control
panel groupware JUJ6.694.016 8669400160J
Key-press panel
groupware JUJ6.694.015 8669400150J
Earphone panel
groupware JUJ6.695.002 8669500020J
Samsung
TFT LTM170W1-L01 68219601701 screen
TFT LC171W03 68211710305 LG screen
Samsung
inverter INV17-4505 59324125010 screen use
inverter INV17-6506 59324165060 LG screen
27
SERVICE MANUAL LS07 chassis
use
Dynamoelectric
speaker Y2898-01-5W-4 56231105042
Remote control KLC5B 8201803760L
Inside power
supply module FSP084-1CD02C 67128084025
CHD-TM201F7:
Material name type module NO. Material code remark
Face frame JUJ8.074.030 8807400300J
Back cover JUJ8.074.033-2 8807400332J
base JUJ8.070.012 8807000120J
Accessories bag JUJ6.479.038 8647900380J
Mainboard Au screen
groupware JUJ6.690.032 8669000320J use
Mainboard LG screen
groupware JUJ6.690.032-7 8669000327J use
Remote control
panel
groupware JUJ6.694.016 8669400160J
Key-press panel
groupware JUJ6.694.015 8669400150J
Earphone panel
groupware JUJ6.695.002 8669500020J
TFT A201SN01 68219020110 AU screen
TFT LC201V02 68212010235 LG screen
AU screen
inverter INV18-605D 59324106054 use
LG screen
inverter INV20-606A D 59324126061 use
Dynamoelectric
speaker Y38106-01-5W-4 56231105043
Remote control KLC5B 8201803760L
Inside power
supply module FSP084-1CD02C 67128084025
CHD-TM150F7:
Material name type module NO. Material code remark
Face frame JUJ8.074.038 8807400380J
Back cover JUJ8.074.039 8807400390J
Base JUJ8.070.015 8807000150J
Accessories bag JUJ6.479.046 8647900460J
28
SERVICE MANUAL LS07 chassis
Mainboard
groupware JUJ6.690.032-2 8669000322J
Remote control
panel groupware JUJ6.694.016 8669400160J
Key-press panel
groupware JUJ6.694.017 8669400170J
Earphone panel
groupware JUJ6.695.002 8669500020J
TFT LTM150XH-L06 68219601565
inverter INV15-474 59324104740
dynamoelectric
speaker Y2898-01-5W-4 56231105042
Remote control KLC5B 8201803760L
Adapter CHA-1204 8290800520B
Chapter Six the Parameter adjustment of factory
repairment mode Factory mode introduction:
The method of Entering into factory mode: turn down the volume to 0, press
down the key of "mute" in remote control, then press the key of "menu" in
remote control. press CH+ and CH- choose the items which need to adjust.
The method of exiting from factory mode: press the in remote control, after
exiting from the factory mode, you should turn on the TV again.
Now the introduction of the modes which are often used is below, the others are
design parameter mode, not permit to modify .
M6 The fast key is the key of "language"
IFPL Adjust the scale of picture and sound the IF signal
M6 The fast key is the key of "language"
TOP Tune AGC voltage
M13 The fast key is the key of "DVD"
DVD The switch of DVD source
DPF The switch of DPF source
M17
LOGO LOGO display or not
BLUEBACK Blue screen switch
M24
AUTO Auto revise
M25 The fast key is the key of "title"
INIT Initialization program
M28 The fast key is the key of "0"
IIC BUS OPEN Open bus
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SERVICE MANUAL LS07 chassis
CHD-TD170F7:
Material name type module NO. Material code scale remark
Face frame JUJ8.074.036 8807400360J 0.1%
Suspend screen JUJ8.640.017 8864000170J 0.1%
Back cover JUJ8.074.037 8807400370J 0.1%
base JUJ8.070.012 8807000120J 0.1%
Accessories bag JUJ6.479.049 8647900490J 0.1%
Mainboard 0.2% Samsung
groupware JUJ6.690.032-5 8669000325J screen use
Mainboard 0.2% LG screen
groupware JUJ6.690.030-11 86690003211J use
DVD drive TDR-085 59C11060850 0.2%
Decode panel 0.2%
groupware JUJ6.693.013 8669300130J
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