BBK LT1516D Service Manual

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LT1516D(RU)

Service Manual

Model version:M1B1V2.10

M1B2V2.10

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Page 1 LT1516D(RU) Service Manual Model version:M1B1V2.10 M1B2V2.10...
Page 2: Table Of Contents
Catalog Chapter One About Maintenance 1.1 Safety precautions 1.1.1 Power supply 1.1.2 Precautions for antistatic 1.1.3 Precautions for display screen 1.1.4 Precautions for laser head 1.1.5 About placement position 1.2 Maintenance method 1.2.1 Electric resistance method 1.2.2 Voltage method 1.2.3 Current method 1.2.4 Element substitution method 1.2.5 Cutting method 1.2.6 Visualized method...
Page 3 2.8 Others Chapter Three Principle and Servicing Section One Principle of the player 3.1.1 System control principle 3.1.2 OVerall wiring diagram 3.1.3 Block diagram of the player 3.1.4 Audio circuit 3.1.5 Power circuit 3.1.6 Video circuit 3.1.7 Block diagram of DVB Section Two Troubleshooting flow chart Section Three Waveform diagram...
Page 4: Chapter One About Maintenance
Chapter One About Maintenance 1.1 Safety precautions 1.1.1 Power supply When maintenance personnel are repairing TV , he should pay special attention to the power with 220V 800V AC and 330V DC which will cause hurt and damage to persons! 1.1.2 Precautions for antistatic Movement and friction will both bring static electricity which causes serious damages to integrated IC.
Page 5: Precautions For Laser Head
1.1.4 Precautions for laser head 1. Do not stare at laser head directly, for laser emission will occur when laser head is working, which will Hurt your eyes! 2. Do not use wiping water or alcohol to clean laser head, and you may use cotton swab. 1.1.5 About placement position 1.
Page 6: Visualized Method
1.2.6 Visualized method Directly view whether abnormalities of collision, lack of element, joint welding, shedding welding, rosin joint, copper foil turning up, lead wire disconnection and elements burning up among pins of Elements appear. Check power supply of the machine and then use hands to touch the casing of part of elements and check whether they are hot to judge the trouble spot.
Page 7: Chapter Two Functions And Operation Instructions
Chapter Two Functions and Operation Instructions 2.1 Features Technical Features #High quality color TFT panel #Maximum resolution 1366x768 for LT1516D. #Multisystem TV tuner with NICAM decoding #Biuilt-in stereo audio system #Composite video ,audio input #Component, RGB/SCART and VGA video input...
Page 8: Controls And Functions
2.3 CONTROLS AND FUNCTIONS 2.3.1 Panel controls and indication Left panel STANDBY button SETUP button Press to switch to setup mode Press to switch on the device/into _VOL+button standby mode. Press to adjust the volume. Headphones output _CH+button POWER button Turn on/off the power.
Page 9: Connection And Starting
-VOL+ buttons Y Cb(Pb) Cr(Pr) PC AUDIO IN Press to decrease/increase volume. Meant for PC stereo audio output EPG button connection. To display the program guide valid in DVB COAXIAL OUT mode. Meant for multi-channel sound playback. FAV button In DVB mode, open favourite channel list. AUDIO VIDEO IN Used for external signal source connection.
Page 10 2.5.4 Accompanying sound type Only some of the TV channels have stereo accompanying sound in NICAM system. #Press NICAM button to select accompanying sound. 2.5.5 TV settings #Press SETUP button to display the menu. 2.5.8 TV setup #Use cursor buttons on the remote control or Select TV SETUP item to adjust channels.
Page 11: Pc Monitor Mode
2.5.9 Function You may select LANGUAGE, TRANSPARENCY, SLEEP and RATIO. #LANGUAGE item enables to select the OSD language. #TRANSPARENCY item enables to adjust transparency of OSD. 2.6.2 Sound #SLEEP item enables to set the sleep timer. Select SOUND item to adjust sound #RATIO item can be changed between 16:9 and parameters.
Page 12: Dvb Function Settings Selection
2.7 DVB FUNCTION SETTINGS Turn on the TV. Press SOURCE button to change source to DVB, then you can enjoy the rich and colorful contents of Digital Video Broadcast! 2.7.3 DVB-T setup In DVB mode, press SETUP button, then The DVB-T Setup Page is composed of five press button to choose DVB item, the DVB parts: Area, Time Zone, parental Age, Antenna...
Page 13 2. Enter the frequency you want to scan by the 5.Channel setup number buttons, then press “OK”, the scan This item is used to search channels, edit the button seems be pressed, press “OK” again to channel list or your favourite channel list. View scan, a scan sign: scanning will be shown on the program guide information, etc.
Page 14: Others
Password Mode: To set whether parental control function needs a password, optional setting: On, Off; Default: On. Password: To change the password of the parental control function, default:000000 You can set the time when the reminding signal should be displayed before the program starts.
Page 15 2.8.3 Technical characteristics #We are permanently improving the quality of our products; hence the product’s design, functionality and technical characteristics may be modified without prior notice. - 12 -...
Page 16: Chapter Three Principle And Servicing
Chapter Three Principle and Servicing Section One Principle of the player 3.1.1 System control principle System control schematic diagram is shown in the figure 3.1.1.1: U104 SCART JACK PS25LV010 KEY1~KEY5 Key-press board INVERTER ON/OFF Inverter components RESET Reset circuit U101 IC-MST718MCU Remote control board PANEL_ON...
Page 17: Overall Wiring Diagram
3.1.2 OVERALL WIRING DIAGRAM EARPHONE BOARD H1506-1 PANEL 1210554 SVA150XG04TB 15 TFT 4941497 CN701 CN111 +12V +12V Brightness BLON MAIN BOARD 21901-4 4942100 J501 CN106 CN105 figure 3.1.2.1 overall wiring diagram - 14 -...
Page 18: Block Diagram Of The Player
3.1.3 Block diagram of the player figure 3.1.3.1 Block diagram of the player - 15 -...
Page 19: Audio Circuit
3.1.4 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 3.1.4.1: 89AL DLIN U117...
Page 20: Video Circuit
Figure 3.1.7Block diagram of DVB is shown in figure3.1.7.1: 1.LT1516D machine consists DVB function and can demodulate DVB-T signal.LT1516D does not consist this circuit.DVB part of this machine adopts PN2020AT+MT8606 and other elements. Block diagram of DVB part is shown as follows:...
Page 21 2.Block diagram of DVB receiving circuit is shown in igure 3.1.7.2: NONIN SIOMAD STV8317F IF_GAIN Feedback Cirduit TUNER MST718BU PN2020AT TUNSDA_D1 TUNSCL_D1 - 18 -...
Page 22: Section Two Troubleshooting Flow Chart
Section Two Troubleshooting flow chart [ Flow chart 1 ] Trouble symptom: standby light is not on Trouble description: connect with power, standby indicator light is not on, machine has no response and buttons have no function. Machine not power on Whether 12V voltage Check power adapter...
Page 23 [ Flow chart 2 ] Symptom: power not on Trouble description: test after machine power on, standby indicator light is not on and +12V power outputted by power adapter is abnormal. Power not on Check Check Check whether filtering whether power whether 12v capacitor TC3/TC4 has board Cn2...
Page 24 [ Flow chart 3 ] Symptom: no sound Description: there is image, but no audio output. All input source has no sound output Check whether pin 34/36 Check STV8317 and of STV_8317 has signal peripheral elements output Check whether power Check power supply loop supply of power amplifier TDA7266...
Page 25 [ Flow chart 4 ] Symptom: white screen Description: screen is white and indicator on. White screen Check Check Check whether U15_37 whether u502_D whether u502_G pin is Change MST718 (PANEL_ON) is low voltage is normal low level level Change U502 Check Check Q505 and peripheral whether Q505_C is...
Page 26 [ Flow chart 5 ] Symptom: DVB has no sound Trouble description: when machine is set in DVB state, there is image but no sound. External input and TV sound are normal. In DVB state, playing is normal and there is no sound output Check whether CE167/CE163 Check MT1389...
Page 27 [ Flow chart 6 ] Symptom: black screen Trouble description: after power on, screen has no display and backlight cannot be on. Black screen After Check according to power on, whether troubleshooting flow of indicator circuit working “Machine cannot power on” is normal Check whether CN103 pin 6...
Page 28 [ Flow chart 7 ] Symptom: DVB has no image Description: DVD has no image but has sound. DVB has no image Whether machine switches in Change machine setup DVB state Check Check Mt1389 and whether L195/L196/L198 peripheral elements has video signal output Check Check U106 peripheral...
Page 29 [ Flow chart 8 ] Symptom: TV cannot search channels Description: channel cannot be searched. T V cannot search channels Check Check whether tuner power whether tuner and TV signal have input has TUNER_CVBS and then change tuner signal output Check whether TUNER_CVBS Check the path between...
Page 30 [ Flow chart 10 ] Symptom: player not power on Description: switch on power, indicator light is not on and buttons have no function. Player not power on After After pressing POWER pressing OPEN Check MST718 and button, whether panel button, whether 101_57 peripheral elements working indicator light...
Page 31 [ Flow chart 11 ] Symptom: screen image flickers Description: screen image flickers and sound is normal. Screen image flickers Check whether screen Check whether software flickers under other version is correct signal source Judge whether it is the Check whether display screen back ground light that flat cable contact is good flashes...
Page 32 [ Flow chart 12 ] Symptom: colour has distortion Description: picture colour has distortion. Colour has distortion Check whether the TTL Check whether clock Check X101/C103/C104 output signal of frequency is normal MST718 is normal Change MST7118 Check whether 3*8bit Check the path between digital signal of MST718 and Cn1...
Page 33 [ Flow chart 14 ]Symptom: Troubleshooting flow chart of DVB module DVB can not work normally Whether player can switch Whether U116, U108 and other elements can work normally to DVB working mode normally Whether DVB can receive TV signal normally Check whether Check lines pin7/8 of tuner...
Page 34: Section Three Waveform Diagram
Section Three Waveform diagram This section collects signal waveform diagram of audio, video and each unit circuit with the 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 exist, so the servicing personnel are expected to pay more attention to check in daily operation.
Page 35 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. - 32 -...
Page 36 6. MST718 clock signal waveform 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 diagram of SCL in IIC bus. - 33 -...
Page 37 9. U103_5:waveform diagram of SDA in IIC bus. 10. TV audio signal waveform diagram: 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 outputted by U114_12 pin when machine is receiving standard signal source in TV mode.
Page 38 12. U114_12:waveform diagram for video signals outputted by pin 12 of tuner when machine is receiving TV signal in TV mode. 13. U114_11:output waveform diagram of NICAM output pin. 14. NICAM processing circuit clock signal waveform diagram: waveform diagram when :X301 is working (frequency 27MHZ).
Page 39 15. Waveform of clock signal outputted by MST718 in LVDS output mode. MST718_101). 16. Waveform of digital signal outputted by MST718 IN LVDS output mode. MST718_99). 17. 8317_34:waveform diagram after the audio signals from tuner are processed by STV8317 and then output from pin 34/36when machine is receiving standard signal source in TV mode.
Page 40 18. 8317_28: when machine is in DVB state, audio signals outputted by Mt1389 output from pin 18/19 after being processed by STV8317. 19. PANEL_ON: waveform comparison diagram for STBY and PANEL_ON signal when machine enters from standby to power-on. STBY 20.
Page 41 21. INVERTER:waveform comparison diagram for STBY and ON/OFF_INVERTER signal when machine enters from standby to power-on. RP111 U116 RP110 U116 - 38 -...
Page 42 U114_7 U114_7 U114_8 U119 - 39 -...
Page 43: Chapter Four Disassembly And Assembly Process
Chapter Four Block Diagram of Play Disassembly and Explosion - 40 -...
Page 44 TB 3×8H black nickel(trigonodont) 4000686 self-tapping screw TB 3×8H black nickel(trigonodont) PCB semi-manufactured 4942009 B1903-2 LD1916DK(RU) product 3005945 front case LT1516D(RU) black with cover board 3073597 remote control lens LT1903 transparent 1210554 display screen component M156B1-L01 15 inches TFT 3872296 screen block LT1500S(RU)
Page 45: Chapter Cinque Pcb Board & Circuit Diagram
Chapter Cinque PCB Board&Circuit Diagram Section One PCB Board 5.1.1 TOP layer of Main Board(21901-4)4942100 - 42 -...
Page 46 5.1.2 Bottom layer of Main Board(21901-4)4942100 - 43 -...
Page 47: Section Two Circuit Diagram
Circuit Diagram Section Two 5.2.1 Main Board. - 44 -...
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Page 63: Chapter Six Bom List
Chapter Six BOM List LT1516D(RU)SILVER REMOTE CONTROL 5472265 MATERIAL MATERIAL NAME SPECIFICATIONS LOCATION CODE 0090147 SMD RESISTOR 1/10W 1Ω±5% 0805 R801 0310048 SMD CAPACITOR 50V 151±5% NPO 0603 C802,C803 0630010 EMISSION PIPE LTE-4206 LED801 0700001 SMD DIODE LS4148 D801~D803 0780085...
Page 64 MATERIAL MATERIAL NAME SPECIFICATIONS LOCATION CODE 0000390 CARBON FILM RESISTOR 1/6W270Ω±5% THREAD COIL NAUGHT 0020005 3W0.39Ω±5% INDUCTOR RESISTOR 0090046 SMD RESISTOR 1/10W 470Ω±5% 0805 0090050 SMD RESISTOR 1/10W 1K±5% 0805 R13,R18 0090057 SMD RESISTOR 1/10W 4.7K±5% 0805 0090072 SMD RESISTOR 1/10W 39K±5% 0805 0090171 SMD RESISTOR...
Page 65 MATERIAL MATERIAL NAME SPECIFICATIONS LOCATION CODE 05700149 DIODE HER107 BELT VD3,VD2,VD7 0570085 TVS DIODE P6KE200A 0620004 LIGHT-EMITTING DIODE Φ3 GREEN LED1 0670011 SILICON BRIDGE GBU805 Y336 0680089 SCHOTTKY DIODE MBR20100CTON TO-220 SMD VOLTAGE REGULATOR 0700123 15V±5% 1/2W DIODE 0780197 SMD TRIODE C1815 SMD FIELD EFFECT 0790051...
Page 66 10×10×8.5 DOUBLE-FACED,HARD UNDER PCB BOARD 5232540 INSULATED PAD 19×13.2×0.3 HOLE ф3.2 5232541 INSULATED SPACER SET HOLE ф3 WHITE 080 5237134 TEFLON CASING Φ1.3 LT1516D(RU)SILVER EARPHONE BOARD H1506-1 4941497 MATERIAL MATERIAL NAME SPECIFICATIONS LOCATION CODE 0090135 SMD RESISTOR 1/8W 100Ω±5% 1206 R701,R702 0260200 CD11C 16V47U±20%5×7 2...
Page 67 VERSION LABEL 3.01 SQUARE WHITE 5236304 SOFT SPONGE SPACER Φ8×Φ5×7 SINGLE-FACED,HARD DUAL COLOR LIGHT EMITTING DIODE 5238189 SOFT SPONGE SPACER 6×6×2.5 DOUBLE-FACED SOFT LT1516D(RU)SILVER MAIN BOARD 21901-4 4942100 MATERIAL MATERIAL NAME SPECIFICATIONS LOCATION CODE 0000276 CARBON FILM RESISTOR 1/4W100Ω±5% SHAPED 10...
Page 68 MATERIAL MATERIAL NAME SPECIFICATIONS LOCATION CODE 0090028 SMD RESISTOR 1/16W 33K±5% 0603 R374,R411,R219 0090034 SMD RESISTOR 1/16W 100K±5% 0603 R225,R228,R404,R416,R216 0090106 SMD RESISTOR 1/16W 4.7Ω±5% 0603 R406 0090109 SMD RESISTOR 1/16W 1MΩ±5% 0603 R108,R307 0090114 SMD RESISTOR 1/8W 0Ω±5% 1206 R524,L206,R749 0090125 SMD RESISTOR...
Page 69 MATERIAL MATERIAL NAME SPECIFICATIONS LOCATION CODE 0100034 SMD RESISTOR NETWORKS 1/16W 0Ω±5% 0603×4 8P RP108~RP111 CE120,CE185,CE1,CE2,CE4,CE162,CE1 64,CE175,CE202,CE301,CE402,CE404,C 02605579 C11T 16V100U±20%6×12 2.5 BELT E405,CE420,CE618,CE112~CE113,CE15 CE204,CE115,CE124,CE125,CE149,CE1 02605589 C11T 25V470u±20%10×16 5 BELT 54,CE505,CE507 CE7,CE5,CE108,CE129,CE150,CE155,C 02605839 C11T 16V220U±20%6×12 2.5 BELT E550,CE551,CE503 02606869 C11T 25V220U±20%8×12 C5 BELT CE123,CE151 02607869 C11C 16V22U±20%4×7 C2.5 BELT...
Page 70 MATERIAL MATERIAL NAME SPECIFICATIONS LOCATION CODE 0310201 SMD CAPACITOR 50V 153±10% 7R 0603 C417 C35~C42,C210,C212,C216,C249,C263,C 0310234 SMD CAPACITOR 16V 105 +80%-20% Y5V 0603 276~C281,C377,C416,C206 0310326 SMD CAPACITOR 50V 121±5% NPO 0603 C208,C211,C214,C215,C372~C375 0310362 SMD CAPACITOR 16V474 +80%-20% Y5V 0603 C413,C667 0310389 SMD CAPACITOR 10V 106 +80%-20% Y5V 0805...
Page 71 MATERIAL MATERIAL NAME SPECIFICATIONS LOCATION CODE 0390286 SMD INDUCTOR 5.6uH±10% 1608 L122,L123,L811~L812,L822~L825 0390287 SMD MAGNETIC BEADS 19Ω/100mHZ±25% 1608 L108~L110,L712~L714,L816,L820 0390300 SMD MAGNETIC BEADS 600Ω/100MHZ±25% 1608 L14,L15,L10,L111~L114,L191 L1,L101,L103,L115,L132,L133,L144,L188, 0390301 SMD MAGNETIC BEADS 600Ω/100MHZ±25% 3216 L189,L194,L200,L202,L17,L203~L204 0390355 SMD INDUCTOR 4.7UH±10% 1608 L405 0390385 SMD INDUCTOR 22uH±10% 2012...
Page 72 MATERIAL MATERIAL NAME SPECIFICATIONS LOCATION CODE 0882655 74HC4053D SOP 0882472 AZ1084S-3.3 TO-263 U521 0882485 AZ11173.3 SO223 U505,U513,U508 0882644 MT1389FE/HD(HD EDITION) QFP U115 0882756 HE4094BT SOP U102 0882883 FS433 TSSOP U106 0883069 AZ11171.8 SO223 U1,U3,U509 0883122 PN2020AT QFP U119 0883166 8606 LQFP U116 0883189 MS718BE PQFP...
Page 73 4210185 MACHINE-TAPPING SCREW BM 3×8H BLACK IC7266 PREFORM SCREW 5120803 SOLIDIFY SILICON RUBBER GO-1715-1 8317,718 HEAT RADIATION SHEET 5143212 VERSION LABEL E.01 SQUARENESS,WHITE LT1516D(RU)SILVER TV BUTTON BOARD 41903-0 5449438 MATERIAL MATERIAL NAME SPECIFICATIONS LOCATION CODE 00001609 CARBON FILM RESISTOR 1/4W0Ω±5%BELT...
Page 74 MATERIAL MATERIAL NAME SPECIFICATIONS LOCATION CODE 5140257 VERSION LABEL 2.0 SQUARE LT1516D(RU)SILVER INVERTER COMPONENTS @5INV1516-0 4942069 MATERIAL MATERIAL NAME SPECIFICATIONS LOCATION CODE 0090003 SMD RESISTOR 1/16W 10Ω±5% 0603 R23,R24 0090014 SMD RESISTOR 1/16W 1K±5% 0603 R37,R38 0090023 SMD RESISTOR 1/16W 10K±5% 0603...
Page 75 OUTPUT HIGH VOLTAGE TERMINAL CN2、CN3 AND PCB PLACES, OUTPUT 5120635 WHITE GLUE HIGH VOLTAGE CAPACITOR C19， C21， INVERTING TRANSFORMER OUTPUT TERMINAL 5141757 VERSION LABEL 2.02 SQUARE WHITE LT1516D(RU)SILVER SOFTWARE PROGRAM EPROM 0900525 MATERIAL MATERIAL NAME SPECIFICATIONS LOCATION CODE 0882153 LC21A SOIC...
Page 76 SOFTWARE PROGRAM EPROM 0900524 MATERIAL MATERIAL NAME SPECIFICATIONS LOCATION CODE 0883190 PM25LV020 SOP U104 - 73 -...

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