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(2) Working principle: when machine is in standby state, pin 57 of MST718 outputs high level signal

To make standby control circuit \STBY signal outputs low level signal. This signal is directly connected to

pin 3 of remote control receiving board flat cable holder Cn801. This control signal inputs to base

electrode of Q801/Q802 through R804/R805 to make Q802 cutoff, Q801 is connected, the red light of bi-

color diode D801 is on, which means that machine enters standby state. After pressing POWER button,

machine enters working state, pin 3 of ,Cn801 outputs high level to make Q802 on/Q801 cutoff, the

green light of b-icolor D801 is on, which means machines enters working state. S801 is IR sensor to

receive remote control signals mainly.

3.2.2 Audio circuit

Audio processing circuit is mainly responsible for the switch, amplifying and restire of audio and

composed of audio source input selection and NICAM processing circuit, audio amplifying circuit and

mute control circuit. Audio processing circuit block diagram is shown in the figure 3.2.2.1:

Figure 3.2.2.1 Audio processing circuit block diagram

1. “Nicam” processing circuit

(1) NICAM: the core technoloy of “NICAM” is the NICAM728 technology developed by BBC.

Besides transmitting TV image and simulating mono-channel signal, NICAM TV broadcasting system also

transmits dual-channel digital coding sound signal. NICAM is famous for clear treble and deep bass with

the sound quality close to listeing to CD disk directly. In the aspect of SNR, dynamic range and channel

separation index, NICAM is far better than the current FM accompany. As TV accompany, NICAM

applies 3 kinds of working mode currently: 1) Bilingual mode: NICAM transmits dual-channel digital

sound relevant or irrelevant to the current program and transmits 3-channel sound signal together with

U117 4580

Multi-channel

audio selection

NICAM signal

processing

Ic301

STV8216

DRIN

DLIN

AVRIN

AVLIN

SCART JACK

SRIN

SLIN

AI3L

AI3R

CD4052

PC AUDIO
J103

Electronic
switch

PCLIN

PCRIN

AV_IN J105

CD4094

Vs1

Vs2

TUNER

MONOIN

SIOMAD

LSL

LSR

TDA7266

1
2

Audio output
amplifying

circuit

Audio
amplifying

Headphone
socket

- 22 -

Содержание LD1506SI-2

Страница 1: ...service manual LD2006SI 2 LD1906SI LT1900S LD1506SI 2 LD1506SI 3 LT1500S 2 LT1500S 3 LT2000S...

Страница 2: ...on LD2006SI 2 change display screen to 15 screen change power board to adapter and make the relevant changes in video main board LD1506SI 3 21903 5 41903 0 B1506 0 D1903 1 H1903 1 J1903 0 Adapter AK0...

Страница 3: ...y 4 LD1506SI 2 adopts adapter AK083 3 to supply power while LD2006SI adopts internal power board to supply power so power input end is added on video main board Remark as for inverter components and p...

Страница 4: ...refer to LT2002S Service Manual Display screen drive adopts LVDS input method and other circuits working principle is totally the same with that of LD2006SI 2 During the course of servicing please ref...

Страница 5: ...ethod 1 2 3 Current method 1 2 4 Element substitution method 1 2 5 Cutting method 1 2 6 Visualized method 1 2 7 Comparison method 1 3 Required device for maintenance Chapter Two Functions and Operatio...

Страница 6: ...nit Circuit Principle 3 2 1 Introduction to laser head 3 2 2 Servo circuit 3 2 3 Laser power control circuit 3 2 4 CD DVD conversion circuit 3 2 1 System control circuit 3 2 2 Audio circuit 3 2 3 Vide...

Страница 7: ...ion to 24CC02A Chapter Cinque PCB board Circuit diagram Section One PCB board Section Two Circuit diagram Chapter six BOM List 3 2 7 Main axis control circuit 3 2 8 Decode circuit 3 2 9 Reset circuit...

Страница 8: ...wire from the top of the surplus metal and connect to the required static electricity device The length and depth of the metal embedded under the earth should be determined according to the wettabili...

Страница 9: ...hould be broken down for test 1 2 2 Voltage method Voltage method is relatively convenient quick and accurate Set the multimeter in voltage position and test power supply voltage of the player and vol...

Страница 10: ...this method to check in high voltage parts 1 2 7 Comparison method A same good PC board is usually used to test the correct voltage and waveform Compared these data with those tested through fault PC...

Страница 11: ...Tone and sound balance adjustment and 4 preset audio settings Disc playback mode Digital video playback DVD Video Super VCD VCD compatibility MPEG 4 standard support Digital audio playback CD DA HDCD...

Страница 12: ...adjust the volume _CH button Press to switch between channels to choose menu item SOURCE button Press to choose the playback mode STANDBY button Press to switch on the device into standby mode POWER b...

Страница 13: ...rn on off the sound VOLUME button Press to adjust the volume USB DVD button Press to select USB DVD mode Button Press to skip forward Button Press to stop the playback Button Press to forward scanning...

Страница 14: ...ttings Press SETUP button to display the menu Use cursor buttons on the remote control or CH buttons on the left panel to select the item Use buttons to adjust selected parameter Use OK button for con...

Страница 15: ...to adjust the channel frequency accurately MANUAL SEARCH item enables to change channel settings AUTO SEARCH item enables to adjust channel setting automatically COLOR SYSTEM item can be changed betwe...

Страница 16: ...n the figure Select the desired menu item using the UP DOWN buttons button press the OK key for confirmation 1 For example if you wish to change the image settings you have to select the image item an...

Страница 17: ...disc another available language will be displayed 3 Image settings menu 1 TV system TV system selection Options Auto PAL NTSC Default option Auto 2 TV Format image ratio settings Options 4 3 pan scan...

Страница 18: ...the reproducing of content is performed in the order in which it is recorded on the disc 2 Equalizer spectrum analyzer Options On Off Default option Off 1 Screensaver screen saver on off Options On Of...

Страница 19: ...y not be applied to some discs Use supply sources of rated voltage otherwise the LCD TV may not function or be damaged In case of the LCD TV s occasional stops please switch the power supply off and t...

Страница 20: ...ions do not work 1 Disc is recorded incorrectly 2 Incorrect key sequence 3 Static voltage on the housing 1 Wait5 10 seconds and the device will automatically teturn to normal state 2 Repeat the operat...

Страница 21: ...rmats 12 12 Power supply Power Consumption Maximum w Power Consumption Power Saving w 65 3 Environmental consideration Operating temperature C Operating humidity Storing temperature C Storing humidity...

Страница 22: ...tible with DIVX MPEG4 format film Support PAL BG DK I SECAM BG DK L L RF signal modulating 3 1 2 Block diagram of the player 3 1 2 1 This machine is mainly composed of the following PCB semi finished...

Страница 23: ...JACK Video amplifying circuit TUNER U119 PN2020 U116 MT8606 DVD PICK_UP Ba5954 Servo drive U302 DVD FLASH U301 U303 EEPROM 24C16 U118 U117 Audio amplifying circuit 4580 U107 Electronic switch Cd4052...

Страница 24: ...ontrol pipe 2 883191 IC TDA7266SA ZIP 1 U112 Audio amplifying IC 3 882030 IC STV8216 TQFP 1 U111 NICAM processing IC 4 883189 IC MST718BE PQFP 1 U101 LCD image processing CPU 5 883323 IC AP1506Adj TO2...

Страница 25: ...m reset circuit is shown in the figure 3 2 1 1 2 Working principle this circuit is a typical low level effective reset circuit After power on 5V EXT changes from 0V to 5V and charge R282 through CE101...

Страница 26: ...rinciple 1 System control schematic diagram is shown in the figure 3 2 1 3 power control circuit STV8216 PANEL_ON control circuit Inverter components Remote control board Reset circuit Key press board...

Страница 27: ...gram for sequence of each control signal output to reset and control circuit of other module to make machine enter normal working state The process from working state to standby state when machine is...

Страница 28: ...low power consumption strong drive and flexible control 1 pin is latch end 2 pin is serial data input end 3 pin is serial clock end When 1 pin is high level the increase of 8 bit paralle output port...

Страница 29: ...processing circuit block diagram is shown in the figure 3 2 2 1 Figure 3 2 2 1 Audio processing circuit block diagram 1 Nicam processing circuit 1 NICAM the core technoloy of NICAM is the NICAM728 tec...

Страница 30: ...28 29 of STV8216 STV8216 block diagram is shown in the figure 3 2 2 2 Figure 3 2 2 2 STV8216 internal block diagram 2 Sound source input selection circuit Besides NICAM processing circuit STV8216 als...

Страница 31: ...dual bridge audio amplifier to drive loudspeaker to make sounds This IC adopts 10V power supply D122 D123 is drop diode and pin 7 is standby control pin After machine enters power on state pin 12 of...

Страница 32: ...achine is switched off Ce151 has been fully charged when power on after machine power switches off Ce151 discharges through Q118 D121 to make Q119 connected now pin 6 of TDA7266 is low level to realiz...

Страница 33: ...518 and MST718 also has video output function Output jack includes TTL LVDS modes When machine is set in DVD or DVB mode Y PB Pr signal is inputted to pin 2 6 10 of FSAV433 and then output from pin 13...

Страница 34: ...video and stereo audio output function 1 Introduction to SCART terminal SCART terminal is a standard input port in Europe In this jack circuit many dual direction diodes are adopted and act as protec...

Страница 35: ...When tuner receives NICAM signal NICAM signals output From pin 11 of tuner to STV8216 for modulating 3 Tuner pin function is shown in the following table 2 TV Tuner circuit 1 Tuner circuit is shown i...

Страница 36: ...stabilizing circuit on video main board is divided to 3 parts 1 5VEXT outputted after being voltage stabilized by Ic503 is mainly supplied for system control circuit 2 5V power outputted after being v...

Страница 37: ...his group of power is mainly used for MST718 and each control circuit and supply working power for the player when in standby working state Display screen working power control circuit display screen...

Страница 38: ...t cannot work After machine enters power on from standby STBY becomes low level Q117 cuts off to make Q116 U511 connected power inputs to audio circuit through U511S D electrode and audio circuit begi...

Страница 39: ...drop U505 is 3 3V voltage stabilizing IC 5 DVD working power voltage stabilizing circuit 1 DV33 1 8V voltage stabilizing circuit diagram is shown in the figure 3 2 5 5 Figure 3 2 5 5DV33 1 8V voltage...

Страница 40: ...turated on pin 3 of Cn103 is low level and boost board stops working After machine enters power on from standby pin 76 of mst718 INVERTERON OFF outputs low level Q102 cuts off pin 3 of Cn103 is high l...

Страница 41: ...all the time According to the symptom we can judge that power board cannot load The reason is that 12V filtering capacitor has electric leakage switch transformer has trouble or the preliminary rever...

Страница 42: ...the peripheral elements of the two channels one by one and find that VD6 15V 0 5W has been stricken through Change voltage stabilizing pipe with the same specification trouble is removed Example 4 sy...

Страница 43: ...no inductive waveform so we can make sure that boost board has not outputted high voltage Shown in the figure 3 3 1 1 use multi meter to test 12V power supply voltage of CN4 and it is normal Use multi...

Страница 44: ...witch to digital video signals to output to display screen other signals output from pin 34 as analog signals to SCART terminal through amplifying circuit to act as video output signals Use oscillogra...

Страница 45: ...trouble symptom we judge that trouble lies in tuner and peripheral elements Channel search is adjusted after the communication between IIC bus and main chip MST718 Use oscillograph to observe pin 12 o...

Страница 46: ...d 39 figure 3 3 1 3 mute circuit diagram Example 14 Example 15 symptom do not read USB Trouble description disc read is normal when in DVD state after inserting USB USB data cannot be read out Analysi...

Страница 47: ...omponents flat cable contacts well and there is no abnormality remove loader flat cable and check whether the contact position of plug and loader clasp has been oxidated Change loader but trouble stil...

Страница 48: ...mptom do not read DVD disc Trouble description in DVD state CD playing is normal DVD playing is not available and then DVD disc ejects out automatically Analysis and troubleshooting firstly check whet...

Страница 49: ...s normal Check the power supply loop from 5VEXTpower toMST718 is normal Y N Change U503 Check whether U503 pin 2 5V voltage is normal Check power board N Check power supply loop Y N Check whether stan...

Страница 50: ...and short circuit Check whether power board TC1 has310v voltage Check fuse TC1and rectifying bridge Check whether each pin voltage of U1 is normal N Check according to troubleshooting process for pla...

Страница 51: ...266 is normal Check whether TDA7266_6 pin is high level Check STV8216 and peripheral elements Check power supply loop of TDA7266 Check mute control circuit Check whether audio output pin waveform of T...

Страница 52: ...tted by U505 is normal Change U505 Check whether X101 clock is normal Check X101 C103 C104 Check whether drive output pin MST718 outputs normally Change MST718 Check whether the socket and flat cable...

Страница 53: ...no sound output N Check whether pin 23 24 audio input of U111 is normal Y Check the line between U111 and U107 Check whether CE167 CE163 has audio signal Check MT1389 Check whether pin 2 6 signal inp...

Страница 54: ...has no display and backlight cannot be on Black screen After power on whether indicator circuit working is normal Check whether CN103 pin 6 power supply is normal Check 12V power supply loop Check wh...

Страница 55: ...ignal output Y N Y N Check whether L195 L196 L198 has video signal output Check Mt1389 and peripheral elements Whether machine switches in DVD state Change machine setup N Check U106 peripheral elemen...

Страница 56: ...heck whether TUNER_CVBS signal transmits onto TVP5146 Check SCL and SDA data pin is normal Check whether tuner power and TV signalhave input and then change tuner Check the path between tuner to Mst71...

Страница 57: ...ssing OPEN button whether 101_57 is high level Check whether Q117is normal Change Q117 Check MST718 and peripheral elements Check standby indication circuit Whether U503_1 is 12v Check U503 and periph...

Страница 58: ...clock frequency is normal Check whether clock frequency is normal Check crystal oscillator resonance circuit Change STV8216 Change tuner Check the circuit between tuner SIF signal and STV8216 Flow ch...

Страница 59: ...s Change inverter and check whether it restores to be normal Whether socket has 12v voltage Check whether software version is correct Check whether display screen flat cable contact is good Check whet...

Страница 60: ...Check whether video flat cable is disconnected Check whether connecting board has rosin joint and whether socket has disconnected pin Check whether clock frequency is normal Check X101 C103 C104 Chang...

Страница 61: ...icing skills For the difference of oscillograph s type model and tuner a certain difference may exist so the servicing personnel are expected to pay more attention to check in daily operation 1 System...

Страница 62: ...3 U104_1 CE gating signal waveform diagram 4 U104_6 SCK clock signal input waveform diagram 5 U104_5 SI data input pin waveform diagram 55...

Страница 63: ...eform diagram waveform diagram when X101 is working frequency 12MHZ 7 Q1_C video signal waveform diagram for pin when machine is receiving Q1_C standard signal source in TV mode 8 U103_6 waveform diag...

Страница 64: ...waveform diagram for audio signals outputted by U114_14 pin when machine is receiving standard signal source in TV mode 11 TV video signal waveform diagram waveform diagram for video signals outputte...

Страница 65: ...outputted by pin 12 of tuner when machine is receiving TV signal in TV mode 13 U001_11 output waveform diagram of NICAM output pin 14 NICAM processing circuit clock signal waveform diagram waveform di...

Страница 66: ...15 CN1_11 display screen drive clock signal waveform diagram 16 CN1_12 display screen enable control end waveform diagram 17 CN1_12 waveform diagram of VSYNC signal outputted by MST718 59...

Страница 67: ...tputted by TTL test point is CN1_19 and test machine when setting in DVD state 20 waveform diagram of DG signal outputted by TTL test point is CN1_29 and test machine when setting in DVD state 18 CN1_...

Страница 68: ...ving standard signal source in TV mode 21 waveform diagram of DB signal outputted by TTL test point is CN1_39 and test machine when setting in DVD power on picture state 23 8216_1 waveform diagram aft...

Страница 69: ...18 19 after being processed by CD4052 STV8216 25 PANEL_ON waveform comparison diagram for STBY and PANEL_ON signal when machine enters from standby to power on 26 INVERTER waveform comparison diagram...

Страница 70: ...ress bus I 1 49 5 DQ2 Data bus I O 1 3 32 MA7 Address bus I 1 22 6 VSSQ Ground 0 33 MA8 Address bus I 0 05 7 DQ3 Data bus I O 1 2 34 MA9 Address bus I 0 04 8 DQ4 Data bus I O 1 5 35 MA11 Address bus I...

Страница 71: ...ch as a ST Wide Surround Equalizer Automatic Loudness and Smart Volume Control for television viewer comfort The STV8226 36 versions can perform additionally the SRS 3D Surround for stereo and mono si...

Страница 72: ...Not Used 4 NC Not Used 5 NC Not Used 6 NC Not Used 7 VDDC AP 3 3 V Power Supply for Audio DAC ADC 8 GNDC AP 0 V Power Supply for DAC ADC 9 AI1L A Left SCART1 Audio Input 10 AI1R A Right SCART1 Audio I...

Страница 73: ...sed 35 HPD B Headphone Detection Input Active Low 36 ADR I Hardware I C Chip Address Control 37 N C Not Used 38 N C Not Used 39 SCL OD I C Serial Clock 40 SDA OD I C Serial Data 41 N C Not Used 42 REG...

Страница 74: ...8 BUS0 B I C Bus Expander Output 2 69 IRQ B I C Status Read Request 70 N C Not Used 71 N C Not Used 72 N C Not Used 73 SIF A Sound IF Input 74 VTOP A ADC VTOP Decoupling Pin 75 VREFIF A AGC Voltage Re...

Страница 75: ...format from PC camcorders and GPS Supports YCbCr inputs from conventional video source and HDTV Supports SCART RGB Fast Blank Supports video input 480i 480p 576i 576p 720p 1080i RGB input resolution i...

Страница 76: ...n Name Pin Type Function 2 VMID Mid Scale Voltage Bypass 3 VCLAMP CVBS YC Mode Clamp Voltage Bypass 4 REFM Internal ADC Bottom De coupling Pin 5 REFP Internal ADC Top De coupling Pin 7 PRINP Analog In...

Страница 77: ...2 30 CVBS1P Analog Input Analog Composite Input for TV CVBS1 31 CVBS1M Analog Input Reference Ground for Analog Composite Input of TV CVBS1 32 CVBS2P Analog Input Analog Composite Input for TV CVBS2 3...

Страница 78: ...5 GOUT 3 LVA0M Output Green channel Output 3 LVDS A Link Channel 0 Negative Differential Data Output 94 GOUT 2 LVA0P Output Green channel Output 2 LVDS A Link Channel 0 Positive Differential Data Outp...

Страница 79: ...tput Power Good Indicator NC Internal MCU Interface with Serial Flash Memory Pin Pin Name Pin Type Function 49 SAR2 Analog Input Connect pull up resistor externally 48 SAR1 Analog Input Button control...

Страница 80: ...ore Power 46 82 VDDP 3 3V 5V Power Digital Input Output Power 1 36 45 51 69 81 111 112 114 119 126 128 GND Ground Ground 3 5 4 function introduction to CD4052 1 Description The CD4052B u107 analog mul...

Страница 81: ...o 20V to Switch Analog Signals to 20VP P VDD VEE 20V Matched Switch Characteristics rON 5W Typ for VDD VEE 15V Very Low Quiescent Power Dissipation Under All Digital Control Input and Supply Condition...

Страница 82: ...Power input 6 MUTE Mute control 14 OUT2 Audio output 7 ST BY Standby control 15 OUT Audio output 8 PW GND Ground wire 3 5 6 function introduction to FSAV433 1 Description The FSAV433 is an ultra low...

Страница 83: ...ansferred to the storage register when the strobe STR input is HIGH Data in the storage register appears at the outputs whenever the output enable EO signal is HIGH Two serial outputs Os and O s are a...

Страница 84: ...e the less positive voltage 3 X state is immaterial 4 positive going transition 5 negative going transition 6 Z high impedance off state 7 nc no change 8 O 6 the information in the seventh shift regis...

Страница 85: ...em s FM NICAM A2 Stereo signal modulating and accompanying restore and external input SCART S VIDEO composite video input mode This model is composed of power boost components power switch board main...

Страница 86: ...10 B Input MT1389 2 19 2 27 2 04 Disc data signal 11 F Input MT1389 2 07 2 44 2 03 Supplementary signal used in trace 12 GND Ground 0 01 0 01 0 Grounding 13 V20 Input loader 2 04 2 06 2 03 Reference v...

Страница 87: ...n the focus of laser beam because of factors of disc error high speed rotation and machine error it is unavoidable that laser beam focus deviates from information face to produce phenomena of orbit bo...

Страница 88: ...ectively after amplifying processing of pre amplifier inside MT1389 now signals are divided into 2 ways inside MT1389 one part through summation amplifying and subtraction circuit inside MT1389 produc...

Страница 89: ...to make objective lens move upwards and downwards 2 TRO data information is saved in disc in form of tracks When disc is rotating disc deviation will produce now laser head is required to adjust In th...

Страница 90: ...23 of MT1389 increase to make voltage of pin 6 of CN101 decrease to reach the purpose of reducing laser power to form an auto power control circuit When reading DVD disc pin 21 is detect signal input...

Страница 91: ...Note Q108 and Q109 are MOS tube 3 Key point voltage unit V is shown as the following table 84 Vcc GND GND Vcc DISC TROUT DESCEJT PICK_UP 3 2 5 Disc slot in circuit LD1506S adopts dual slot in and sea...

Страница 92: ...disc outwards When disc passes through the detecting of the photoelectric tube Q1 inside loader after disc is out to the appointed position TROUT becomes low level and disc tray out stops Note in orde...

Страница 93: ...IN DISC and OUT DISC signal to ensure the two are not high level at the same time When the two are high level input base electrode of Q130 is made to low level through Q180 on to ensure the normal wo...

Страница 94: ...that whether disc has stopped rotating 3 Working principle MT1389 has a comparator inside composed of operational amplifier in which OP is the in phase input end of operational amplifier OP is reverse...

Страница 95: ...DIN Pin 50 of MT1389 2 44 2 41 0 41 2 44 DMSO Pin 5 of D5954 1 42 1 42 VIP4 Pin 30 of MT1389 1 41 1 41 SDRAM SDCLK SDCKE DCS DRAS SWE DQM0 DQM1 DQ0 DQ15 MA0 MA11 URST PWR PRD PCE A0 A20 AD0 AD7 MT 138...

Страница 96: ...of disc reading and performs panel display at the same time of working Playback process laser head picks up disc signal from disc after servo system processing then send to decode circuit for decoding...

Страница 97: ...in normal condition at the moment of power on it decreased to 0V from 5Vgradually Q103_C is high level when in normal condition at the moment of power on it increases to 5V from 0V 3 2 10 Video circu...

Страница 98: ...plifying and filtering circuit directly output audio signals to Cd4052 and then output after sound source switch through audio switch circuit to send to stv8216 for the second selection and then outpu...

Страница 99: ...w level MT1389HD begins to read SD content and then send to Mt1389 through data line SDD0 SDD3 for decoding to revert AV signals MS card working principle is the same with that of SD card J901 J902 is...

Страница 100: ...amplifying board to main video board has trouble Change flat cable and trouble is removed Example 2 Symptom disc tray ejects out automatically Description after power on load disc and disc tray ejects...

Страница 101: ...206 output circuit and find there is only 1 4V and core voltage is abnormal 1 9V when in normal cases After changing U206 voltage is normal and trouble is removed Example 6 Symptom DVD has no image De...

Страница 102: ...k is normal Check X109 C398 C399 Check whether pin 68 reset signal of MST718 is normal Check system reset circuit Upgrade FLASH and whether machine is normal Change FLASH 3 3 2 Troubleshooting flow ch...

Страница 103: ...Check whether SDRAM works Check whether SDRAM Mt1389 has rosin joint Check SDRAM and MT1389 Weld again Change Mt1389 Y Y N N 96 A Figure 3 3 2 1 Troubleshooting flow chart for DVD has no output...

Страница 104: ...ck the line from pin 1 2 of XS301 to coil Check D5954 Whether main axis electric machine rotates Whether pin 5 of D5954 has signal input Check MT1389 pin filtering capacitor Whether D5954 Check electr...

Страница 105: ...flat cable Change 24P flat cable Whether disc rotation speed is normal Whether there is RF signal Change loader Check whether LD DVD LD CD is normal Check Mt1389 Check Q110 Q111 and socket Cn101 Chan...

Страница 106: ...mponents video output is normal Whether pin 182 183 185 of MT1389 have signal output Check whether pin 13 15 17 of U106 has signal output Check U106 and peripheral elements Check MST718 and peripheral...

Страница 107: ...figure 3 3 2 4 Trouble description when machine switches in DVD state disc read is normal image is normal no sound output and external sound input is normal Figure 3 3 2 4 Troubleshooting flow chart...

Страница 108: ...purpose to help servicing personnel to judge where trouble lies in accurately and quickly to improve servicing skills For the difference of oscillograph s type model and tuner a certain difference may...

Страница 109: ...waveform diagram of pin 9 of Xs301 B C D E F 3 DMO signal when there is main axis rotation waveform diagram of pin 37 of U201 MT1389 4 FMO signal when there is feed waveform diagram of pin 38 of U201...

Страница 110: ...signal when there is trace waveform diagram of pin 41 of U201 MT1389 6 FOO signal when there is focus waveform diagram of pin 42 of U201 MT1389 7 Waveform diagram of pin 29 when no disc in of U214 FLA...

Страница 111: ...m diagram of L229 4 Waveform diagram for audio signal 1 1KHZ analog audio signal waveform diagram you are recommended to use test disc if not the tested waveform will change at any time to affect judg...

Страница 112: ...form diagram for optical coaxial digital audio signal 1 1 1 5 Waveform diagram of audio signals not being filtered and amplified test point audio signal amplifying input end Tc241 6 27M clock signal w...

Страница 113: ...ome Theater profile It makes the MT1389 based DVD player be capable of playback MPEG 4 content which become more and more popular The progressive scan of the MT1389HD utilized advanced motion adaptive...

Страница 114: ...ADCs and DACs for digital servo control Provide 2 general PWM Tray control can be PWM output or digital output 6 Embedded Micro controller Built in 8032 micro controller Built in internal 373 and 8 b...

Страница 115: ...56 16 color RLC format OSD Automatic scrolling of OSD image 11 Audio Effect Processing Dolby Digital AC 3 EX decoding DTS DTS ES decoding MPEG 1 layer 1 layer 2 audio decoding MPEG 2 layer1 layer2 2 c...

Страница 116: ...nalog power 1 8V 252 OSP Analog output RF Offset cancellation capacitor connecting 253 OSN Analog output RF Offset cancellation capacitor connecting 254 RFGC Analog output RF AGC loop capacitor connec...

Страница 117: ...C 4 20 MIDI1 Analog input Laser power monitor input 21 MIDI2 Analog input Laser power monitor input 22 LDO2 Analog output Laser driver output 23 LDO1 Analog output Laser driver output ADC Power 2 244...

Страница 118: ...ow pass filter 239 PLLVDD3 Power Power pin for data PLL and related analog circuitry 240 LPFON Analog Output Negative output of loop filter amplifier 241 LPFIP Analog input Positive input terminal of...

Страница 119: ...uitry Micro Controller and Flash Interface 48 62 HIGHA0 In Out 4 16mA SRPU Microcontroller address 8 74 HIGHA1 In Out 4 16mA SRPU Microcontroller address 9 73 HIGHA2 In Out 4 16mA SRPU Microcontroller...

Страница 120: ...ntroller address 6 IO 61 IOA 7 In Out 4 16mA SRPU Microcontroller address 7 IO 67 A16 In Out 4 16mA SRPU Flash address 16 91 A17 In Out 4 16mA SRPU Flash address 17 63 A18 In Out 4 16mA SRPD SMT Flash...

Страница 121: ...RS232 RxD 104 UP3_1 TXD In Out 4mA SRPD SMT 1 Microcontroller port 3 1 2 8032 RS232 TxD 105 UP3_4 RXD SCL In Out 4mA SRPD SMT 1 Microcontroller port 3 4 2 Hardwired RD232 RxD 3 I2C clock pin 106 UP3_...

Страница 122: ...lock 2 Phase de modulation 211 ACLK In Out 4mA SMT Audio DAC master clock 197 ASDATA0 In Out 4mA PD SMT 1 Audio serial data 0 Front Left Front Right 2 DSD data left channel 3 Trap value in power on re...

Страница 123: ...ntroller external interrupt 2 II GPIO 216 SPDIF Output 4 16mA SR ON OFF S PDIF output 217 APLLVDD3 Power 3 3V Power pin for audio clock circuitry 218 APLLCAP Analog In Out APLL External Capacitance co...

Страница 124: ...t 193 YUV0 CIN Output 4MA SR 1 Video data output bit 0 2 Compensation capacitor 192 DACVSSC Ground Ground pin for VIDEO DAC circuitry 191 YUV1 Y Output 4MA SR 1 Video data output bit 1 2 Analog Y outp...

Страница 125: ...eo input II Version AD input port 2 III GPIO IV Microcontroller external interrupt 4 Video Interface 12 160 DACVDDC Power 3 3V power pin for video DAC circuitry 161 VREF Analog Bandgap reference volta...

Страница 126: ...1 6 In Out Non pull 1 Digital Video output C bit 0 2 GPIO 175 C_1 IO_1 RD1 7 In Out Non pull 1 Digital Video output C bit 1 2 GPIO 173 C_2 IO_2 RD1 8 In Out Non pull 1 Digital Video output C bit 2 2 G...

Страница 127: ...2 GPIO 155 RA4 In Out DRAM address 4 154 RA5 In Out DRAM address 5 153 RA6 In Out DRAM address 6 152 RA7 In Out DRAM address 7 151 RA8 In Out DRAM address 8 150 RA9 In Out DRAM address 9 149 RA11 In...

Страница 128: ...ata 3 116 RD4 In Out DRAM data 4 115 RD5 In Out DRAM data 5 114 RD6 In Out DRAM data 6 113 RD7 In Out DRAM data 7 112 IO_19 DQS0 In Out GPIO 111 DQM0 In Out Non pull Data mask 0 JTAG Interface 4 51 TD...

Страница 129: ...output I 3 5 3 Function introduction to D5954 D5954 U118 is a servo drive IC with built in 4 channel drive circuit Digital focus trace feed and main axis drive signal outputted by MT1389 is sent to D...

Страница 130: ...al input 1 4 1 41 1 4 24 CTK2 External feedback loop 2 41 2 52 2 53 25 CTK1 External feedback loop 2 51 2 52 2 53 26 VINTK Trace control signal input 1 42 1 42 1 41 27 BIAS 1 4V reference voltage inpu...

Страница 131: ...igure 3 5 5 1 Casing and pin function explanation 2 The function of 24LLC02 is to keep some setup status of machine such as system information of sound and language selection not losing after power on...

Страница 132: ...ine on table board flatly Pay attention to underlay a soft sponge spacer in display screen position to avoid scratching screen 2 Use electric screwdriver to take down the screw fixed between rear casi...

Страница 133: ...cable remove the screw that fixes video main board 9 Remove the two screws fixed in rear casing 10 Take out video main board Please note that tuner of the video main board still locks on rear casing...

Страница 134: ...nts and pay attention not to damage flat cable 16 Take out the 4 fixing bracket and 4 fixing clasps that fix display screen components and the display screen components may be taken out Now disassembl...

Страница 135: ...R9 TC2 JP2 N HS1 RT1 C3 Q1 100 240V AC IN HS2 L C1 XS1 L2 C2 B1 T3 15AL250V F1 TC1 R6 HIGH VOLTAGE CAUTION C6 C17 VD2 R20 JP1 C13 T01 TC4 VD4 L3 TC3 Chapter Cinque PCB board Circuit diagram Section O...

Страница 136: ...U1 R10 R17 R15 C8 R11 R19 C10 R13 C18 C14 R4 V1 R18 VD6 C11 RB R5 RA R16 C12 R7 C7 R2 R3 C16 5 1 2 Bottom layer of POWER Board 129...

Страница 137: ...ON HIGH VOLTAGE C34 C36 C32 CN5 CN4 C39 R38 R39 R25 T6 C38 T5 CAUTION HIGH VOLTAGE T4 CAUTION D 2 R41 R40 D6 R28 R23C31 D3 C33 R24 R29 R42 D7 R43 R44 D8 R45 D4 CAUTION CN2 CN3 C26 C28 C30 C243 C241 L2...

Страница 138: ...5 1 4 Bottom layer of Boost Board 131...

Страница 139: ...1 L233 L232 A1507 4 22 J302 C240 R335 R325 R334 L211 R323 R324 R329 C342 C344 R330 R333 R332 R331 L218 L221 L220 L219 C339 C341 R327 R328 R601 C604 C603 C605 C602 L601 L602 ROUT R602 C601 XS601 C606 G...

Страница 140: ...5 1 6 Bottom layer of Main Board 133...

Страница 141: ...4 SDO 53 SDI 52 SCK 51 GNDC 50 VDDC 49 SAR2 48 SAR1 47 SAR0 46 VDDP 45 GNDP 44 PGOOD 43 SENSE1 42 FB1 41 PWMOUT1 40 SENSE2 39 FB2 U101 MST718BE X101 12MHz R108 1M C103 20P C104 20P R407 820 CE108 220u...

Страница 142: ...02 27P C203 27P 1 2 3 4 5 6 7 8 RP105 100R L118 B221 L116 B601 L211 B221 X109 27MHz R416 100K C399 27P C398 27P CE551 220u 16V C551 104 1 GND 2 OUT 3 IN 4 TAB U521 LM1085 3 3 adj CE550 220u 16V C550 1...

Страница 143: ...H C273 221 C271 102 L122 5 6uH R289 330 R290 330 C275 104 C276 105 C277 105 C278 105 R122 75 R296 62 L809 10 C817 10p C818 SDV L8115 6uH C822 221 C821 102 L812 5 6uH C824 221 C823 102 L218 B221 C195 1...

Страница 144: ...B E C Q106 C1815 C501 104 C502 104 L136 FB CE125 470u 16V C351 104 1 GND 2 OUT 3 IN 4 TAB U513 AMS1117 3 3 C347 104 CE121 47u 16V CE122 47u 16V C348 104 L133 B601 1206 R320 4 7K R321 75 D111 1N4148 C3...

Страница 145: ...56 4 7K D109 1N4148 D108 1N4148 CE185 100u 10V R161 100 R162 100 R163 100 1 1 1 1 1 1 R138 100 R139 100 R140 100 C179 473 C180 473 R344 4 7K R343 4 7K D116 1N4148 D115 1N4148 R756 3 3K R761 0 R764 0 1...

Страница 146: ...3 Y 16 VDD 8 VSS 7 VEE U107 CD4052 C748 104 C781 4 7u 25V C782 4 7u 25V C783 4 7u 25V C784 4 7u 25V C785 4 7u 25V C786 4 7u 25V C787 4 7u 25V C788 4 7u 25V R371 1M R370 1M R369 1M R368 1M R846 10K R8...

Страница 147: ...AI1R 11 VMC1 12 GND SA 13 VMC2 14 AI2L 15 AI2R 16 VDDA 17 GNDAH 18 AO2L 19 AO2R 20 VDDH 60 59 58 CKTST 57 VDD2 56 GND2 55 GNDP 54 VDDP 53 XTO 52 XTI 51 50 49 GNDSP 48 47 GND1 46 VDD1 45 MCK 44 SYSCK 4...

Страница 148: ...2 2K R254 10K 1 S 2 S 3 S 4 G 5 D 6 D 7 D 8 D U511 Si9435DY R255 0 1206 4 IN1 7 ST BY 12 IN2 6 MUTE 1 OUT1 2 OUT1 15 OUT2 14 OUT2 13 VCC 3 VCC 9 S GND 8 PW GND 11 NC 10 NC 5 NC U112 TDA7266 1 2 D122...

Страница 149: ...2 R174 4 7K R175 4 7K 1 2 L181 B601 1A 1206 C139 104 CE155 220u 16V R181 100 R182 100 C144 101 C145 101 B E C Q121 C1815 B E C Q123 S8550D R613 10K R217 1K R218 22 1206 C206 105 R219 33K CE157 100u 16...

Страница 150: ...3 117 RD3 116 RD4 115 RD5 114 RD6 113 RD7 112 IO_19 111 DQM0 110 INT0 109 IR 108 PRST 107 ICE 106 UP3_5 105 UP3_4 104 UP3_1 103 UP3_0 102 UP1_7 101 UP1_6 100 UP1_5 99 UP1_4 98 UP1_3 97 UP1_2 96 DVDD3...

Страница 151: ...166 10u 16V CE165 10u 16V C217 104 CE162 100u 16V L194 B601 1206 C219 104 R225 100K Q126 C1815 R226 1K Q125 C1815 R227 1K R228 100K C220 101 C221 101 R229 30K R230 30K R231 10K R232 4 7K R233 10K R234...

Страница 152: ...VOLD 18 VOLD 19 PGND 20 VNFTK 21 PVCC2 30 GND2 22 PREGND 23 VINLD 24 CTK2 25 CTK1 26 VINTK 27 BIAS 28 STBY 14 VOFC 13 VOFC 12 VOSL 11 VOSL 10 PGND 9 PVCC1 8 VCC 29 GND1 7 VINFFC 6 VOSL 5 VINSL 4 VINS...

Страница 153: ...28 DATA7 13 CLOCK 10 VALID 9 SYNC 8 ERROR 62 GPO1 48 GPO0 39 GPIO1 16 GPIO0 3 RFSDA 4 RFSCL 1 VSS 6 VSS 12 VSS 14 VSS 21 VSS 25 VSS 29 VSS 37 VSS 42 VSS 45 VSS 50 AVSS_PLL 51 DVSS_PLL 53 DVSS_ADC 61...

Страница 154: ...04 C172 104 C181 102 R200 10K R201 330 R202 1 R203 1 R204 150K R205 150K R206 680K R207 0 R208 680K C182 222 C183 222 R209 10K R210 10K R211 10K C194 153 C193 153 R212 330 R213 330 1 2 R214 100 1206 R...

Страница 155: ...11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 CN1 CN50 SMT 1 1 1 1 1 1 1 1 1 R39 0 R40 0 C17 20P 1 GND 2 OUT 3 IN 4 TAB IC702...

Страница 156: ...20K R27 1K R28 1K R22 20K R29 1K R30 1K R23 20K R31 1K R32 1K R24 20K R20 10K R25 20K R26 20K IL LV C24 473 X7R R4 150K Dim R1 10K R2 10K R14 33K R15 0ohm REF R13 150K R3 10K R12 100K R11 47K REF Dim...

Страница 157: ...5A VD3 HER105 H GND C11 101 0805 R16 1 2K 0805 R4 39K 0805 R5 10uH 0805 R7 4 7K 0805 H GND H GND H GND V1 3DG1815M R18 1K 0805 VD6 15V 0 5W H GND C2 102 250V R3 4 7R 1206 R2 4 7R 1206 C7 103 200V GBU...

Страница 158: ...01 1 8R DNS C901 104 CE902 100U 16V 1 GND 2 D 3 D 4 VCC 5 GND 6 GND J902 USB 2UB 0001M000 R902 1 8R DNS C906 104 CE901 100U 16V C910 104 CE903 47U 16V L923 FB 1206 C909 104 CE904 100U 16V L924 FB 1206...

Страница 159: ...R708 0090001 SMD RESISTOR 1 16W 0O 5 0603 L8 R8 R9 R18 R19 R46 R47 R48 R207 R315 R 551 R761 R764 R28 R308 0090114 SMD RESISTOR 1 8W 0O 5 1206 R524 L206 0090272 SMD RESISTOR 1 16W 1O 5 0603 R202 R401...

Страница 160: ...816 0090223 SMD RESISTOR 1 16W 2K 5 R109 R110 0090017 SMD RESISTOR 1 16W 2 2K 5 0603 R147 R252 R253 R281 R372 R373 R377 R378 R384 R504 R505 0090183 SMD RESISTOR 1 16W 3K 5 0603 R334 R340 0090019 SMD R...

Страница 161: ...1 0310049 SMD CAPACITOR 50V 221 5 NPO 0603 C822 C824 C846 C850 0310051 SMD CAPACITOR 50V 331 5 NPO 0603 C452 C453 0310052 SMD CAPACITOR 50V 391 5 NPO 0603 C252 0310066 SMD CAPACITOR 50V 102 10 7R 0603...

Страница 162: ...6V470U 20 8 14 3 5 CE204 0260656 CD CD288H 16V470U 20 10 12 5 CE3 CE115 CE124 CE125 CE149 CE154 CE5 05 0390052 MAGNETIC BEADS INDUCTOR FB L3 L134 L136 L503 0390188 SMD MAGNETIC BEADS BGH1608B102L R309...

Страница 163: ...Q119 Q125 Q126 Q504 Q505 Q703 Q704 0780198 SMD TRIODE 2S1015 Q118 0790021 FIELD EFFECT TRANSISTOR IR7416 SOP U511 0790097 FIELD EFFECT TRANSISTOR AO4419 SO8 U511 0883191 IC 7266SA ZIP U112 0882030 IC...

Страница 164: ...SOCKET 50P 0 5mm SMD NEXT MEET WITH CLASP CN1 1940006 SOCKET 6P 2 5mm CN6 1940198 CABLE SOCKET 6P 1 0mm SMD SUBMIT MEET WITH CLASP CN107 1940390 CABLE SOCKET 22P 1 0mm SMD NEXT MEET WITH CLASP CN110 1...

Страница 165: ...0 SMD RESISTOR 1 10W 1K 5 0805 R13 R18 0090718 PRECISION SMD RESISTOR 1 10W 4 32K 1 0805 R17 0090719 PRECISION SMD RESISTOR 1 10W 12K 1 0805 R10 0090720 PRECISION SMD RESISTOR 1 10W 4 75K 1 0805 R15 0...

Страница 166: ...L 0790114 FIELD EFFECT TRANSISTOR S1260Z PLASTIC SEALED TO 220 Q1 1940045 SOCKET 2P 8 0mm 2 CN1 1940006 SOCKET 6P 2 5mm CN2 1350089 POWER SUPPLY SWITCH P6059 W VDE SW1 2300071 FUSE 3 15AL 250V WITH CA...

Страница 167: ...ILM RESISTOR 1 40O 5 R401 R405 0000185 CARBON FILM RESISTOR 1 4330O 5 R402 R406 0000188 CARBON FILM RESISTOR 1 4470O 5 R403 R407 0000195 CARBON FILM RESISTOR 1 41K 5 R408 1564583 PCB 41903 0 1050016 H...

Страница 168: ...940024 SOCKET 5P 2 0mm CN901 1940390 CABLE SOCKET 22P 1 0mm SMD NEXT MEET WITH CLASP CN902 1633754 PCB 0001097 0882923 IC EN29LV160AB 70TCP TSOP U302 0882665 IC S29AL016D70TFI02 TSOP U302 0883190 IC P...

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