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...
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2.2.3 Others Chapter Three Principle and Servicing The previous manual: TV part 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 3.1.7Block diagram of DVB Section Two Troubleshooting flow chart...
Chapter One About Maintenance 1.1 Safety precautions 1.1.1 Power supply When maintenance personnel are repairing DVD 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.
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.
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.
2.1 Section One TV SEGMENT 2.1.1 Features Technical Features #High quality color TFT panel(15 inch for LD1506DK, 19 inch for LD1906DK ) #Maximum resolution 1024X768 for LD1506DK,1440X900 for LD1906DK. #Built-in DVD player with Slot-in mechanism #Multisystem TV tuner with NICAM decoding...
User manual 1pcs Warranty Card 1pcs Karaoke disc 1pcs 2.1.3 CONTROLS AND FUNCTIONS (1) Panel controls and indication For LD1506DK For LD1906DK Left panel _CH+button SETUP button Press to switch between channels/to Press to switch to setup mode choose menu item.
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STANDBY button Right panel Press to switch on the device/into Disc tray standby mode. USB port POWER button EJECT button Turn on/off the power. Press to open/close the disc tray. Headphones output STOP button Microphone input 1 Press to stop the playback. Microphone input 2 PLAY/PAUSE button Front panel...
#Turn to Picture item on this page for details. STARTING SELECT ENTER RETURN SETUP (1 )Switching interfaces For LD1506DK and LD1906DK (3) Default sound settings selection #You may select one of the default sound settings: USER, MUSIC, FILM and NEWS. #You may adjust necessary parameters in the RF input device menu.
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(4 )Accompanying sound type Only some of the TV channels have stereo accompanying sound in NICAM system. #Press NICAM button to select accompanying sound. (5 ) TV settings #Press SETUP button to display the menu. #Use cursor buttons on the remote control or (8) TV setup +CH-buttons on the left panel to select the item.
(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)Sound #SLEEP item enables to set the sleep timer. Select SOUND item to adjust sound #RATIO(only for LD1906DK)item can be parameters.
2.2 Section Two DVD SEGMENT 2.2.1 Controls and functions Front panel controls For LD1506DK For LD1906DK USB port USB ports EJECT button Disc tray Press to open/close the disc tray. EJECT button STOP button Press to open/close the disc tray.
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5. HDCD: Set filter mode. (2) Audio setup #Optional settings: Off, 1X, 2X; 1.Down mix mode: this item is used to set this #Default: 1X. unit’s DOWN MIX mode to change multi channel 6. MIC Setup: audio into 2-channel audio output. This item may be used to set volume and echo #Optional settings: LT/RT, Stereo;...
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(4) Preference setup 8.Default: This item is used to restore all settings 1. TV Type: To set the output video system of this to the default value except” Parental control” and player. “ Password” in the setup menu. #Optional settings: PAL, Auto, NTSC; Default: (5) Password setup PAL.
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(2) Video setup 4.Antenna power Turn on/off antenna power supply. Optional 1.Hue: This item is used to set the hue of video settings: On. Off; Default: Off outputs. 5.Channel setup 2.Saturation: This item is used to set the This item is used to search channels, edit the saturation of video outputs.
Manual scan 1. In setup menu, select” Manual Scan”, a manual scan will be shown as follows: 2. Enter the frequency you want to scan by the number buttons, then press “OK”, the scan button seems be pressed, press “OK” again to You can set the time when the reminding scan, a scan sign: scanning will be shown on the signal should be displayed before the program...
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(2)Trouble shooting Please check probable causes of malfunction before addressing the service center. (3) Technical characteristics Karaoke - 15 -...
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#We are permanently improving the quality of our products; hence the product’s design, functionality and technical characteristics may be modified without prior notice. #We do not guarantee that all discs can be played smoothly due to the disc quality, disc recording quality and recording format.
Chapter Three Principle and Servicing The previous manual: TV part 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 INVERTER KEY1~KEY5 Key-press board ON/OFF Inverter components FCLK RESET Reset 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...
Figure 3.1.7Block diagram of DVB is shown in figure3.1.7.1: 1.LD1506DK machine consists DVB function and can demodulate DVB-T signal.LD1506DK 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:...
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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 - 22 -...
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...
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[ 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...
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[ 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...
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[ 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...
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[ Flow chart 5 ] Symptom: DVD has no sound Trouble description: when machine is set in DVD state, there is image but no sound. External input and TV sound are normal. In DVD state, playing is normal and there is no sound output Check whether CE167/CE163 Check MT1389...
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[ 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...
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[ Flow chart 7 ] Symptom: DVD has no image Description: DVD has no image but has sound. DVD has no image Whether machine switches in Change machine setup DVD state Check Check Mt1389 and whether L195/L196/L198 peripheral elements has video signal output Check Check U106 peripheral...
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[ 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...
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[ 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...
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[ 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...
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[ 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...
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[ Flow chart 13 ] Symptom: Troubleshooting flow chart of no sound for MIC (check whether MIC is on before detecting, whether player outputs sound normally). No sound for MIC Check Check Check Check MIC socket and whether pin U44_7 whether pin CN2_2 has whether U44_2 has elements from socket to U44...
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[ Flow chart 14 ]Symptom: Troubleshooting flow chart of DVB module DVB can not work normally Check whether DVD Check trouble shootingflowchart function isnormal of abnormal DVD function Whether player can switch Whether U116, U108 and other elements can work normally to DVB working mode normally Whether...
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.
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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. - 37 -...
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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. - 38 -...
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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.
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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).
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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.
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18. 8317_28: when machine is in DVD 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.
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21. INVERTER:waveform comparison diagram for STBY and ON/OFF_INVERTER signal when machine enters from standby to power-on. RP111 U116 RP110 U116 - 43 -...
Section Three Servicing and Principle The next manual: DVD part Section One Principle of the player 3.1.1 Audio circuit 1. Audio signal process block diagram is shown in the figure 3.1.1.1: 89AL DLIN U117 89AR DRIN 7266P STV8317 SOUTL SAPDIF SCART Optical SOUTR...
3.1.3 Servo circuit block diagram is shown as in the following figure 3.1.3.1: Servo circuit Switch circuit MD11 LDO2 APC circuit LDO2 A B C D E F RFO CN101 FOSO FMSO MT1389 TRSO DMSO BA5954 Main axis electric machine Feed electric machine Main axis control...
Section Two Troubleshooting flow chart 1. Troubleshooting process for ”DVD has no output” is shown in the figure 3.2.1.1: Trouble description: when switching in DVD state, there is no DVD image and loader has no action of drawing in disc. Power on and switch machine in DVD state, DVD cannot work and has no power-on image.
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Check Check whether SDRAM whether SDRAM Check SDRAM and MT1389 Mt1389 has rosin works joint Change Mt1389 Weld again Figure 3.2.1.1 Troubleshooting flow chart for “ DVD has no output ” - 49 -...
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2. Troubleshooting process for “Not read disc” is shown in the figure 3.2.2.1: Trouble description: switch machine in DVD state, load disc and machine displays that there is no disc or cannot read disc for a long time. Not read disc Whether pin 26 of D5954 Whether...
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Whether Whether Change loader disc rotation speed is there is RF signal normal Change loader Whether there is ABCDEF signal Check CN101 and flat cable Check MT1389 and its peripheral Check whether LD-DVD Check Mt1389 LD-CD is normal Check Q110, Q111 Change and socket Cn101 Change 24P flat cable...
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3. Troubleshooting process for “DVD has no video output” is shown in the figure 3.2.3.1: Trouble description: machine works normally in other state; when switching in DVD state, there is sound output but no image output. DVD video has no output Check whether video output Resume set mode...
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4. Troubleshooting process for “DVD has no sound output” is shown in the figure 3.2.4.1: Trouble description: when machine switches in DVD state, disc read is normal, image is normal, no sound output and external sound input is normal. DVD has no sound output Check whether pin 8 12V Check +A12V power...
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.
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(2). A signal waveform diagram of pin 9 of CN101(B, C, D, E, F 3. DMO signal (when there is main axis rotation) waveform diagram of pin 37 of U115 (MT1389) 4. FMO signal (when there is feed) waveform diagram of pin 38 of U115 (MT1389) - 55 -...
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5 .TRO signal (when there is trace) waveform diagram of pin 41 of U115 (MT1389) 6. FOO signal (when there is focus) waveform diagram of pin 42 of U115 (MT1389) 7. Waveform diagram of pin 29 (when no disc in) of U214 (FLASH) - 56 -...
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8. Waveform diagram of pin 38of U211 (SDRAM) 9 .Video signal waveform diagram of L229 10. 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 judgment), waveform of other channels is the same except subwoofer.
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(2). SPDIF: waveform diagram for optical/coaxial digital audio signal 11. Waveform diagram of audio signals not being filtered and amplified (test point: audio signal £ - 1 1 1 £ - amplifying input end Tc241) £ - 1 0 7 £ - 12.
Chapter Six BOM List LD1506DK(RU) SILVER TV BUTTON BOARD 41903-0 5449438 MATERIAL MATERIAL NAME SPECIFICATIONS LOCATION CODE 0000160 CARBON FILM RESISTOR 1/4W0Ω±5% R401,R405 0000185 CARBON FILM RESISTOR 1/4W330Ω±5% R402,R406 0000188 CARBON FILM RESISTOR 1/4W470Ω±5% R403,R407 0000195 CARBON FILM RESISTOR 1/4W1K±5%...
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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 LD1506DK(RU) SILVER DVD BUTTON CONTROL BOARD J1903-0 5449477 MATERIAL MATERIAL NAME SPECIFICATIONS LOCATION CODE 0570006 DIODE 1N4148...
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LOCATION CODE LIGHT TOUCH RESTORE 1340064 KFC-06-2WB L3.8 SW601~SW603 SWITCH 1564582 J1903-0 1940026 SOCKET 3P 2.0mm CN601 LD1506DK(RU) SILVER RECEIVING BOARD OF REMOTE CONTROL B1506-0 5449978 MATERIAL MATERIAL NAME SPECIFICATIONS LOCATION CODE 0090009 SMD RESISTOR 1/16W 330Ω±5% 0603 R801 0090013 SMD RESISTOR 1/16W 680Ω±5% 0603...
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OUTPUT HIGH VOLTAGE TERMINAL 、CN3 AND PCB POSITION, OUTPUT HIGH VOLTAGE 5120635 WHITE GLUE CAPACITOR C19、C21, OUTPUT TERMINAL OF INVERTER TRANSFORMER 5141825 VERSION LABEL 3.00 SQUARE WHITE LD1506DK(RU) SILVER MIC BOARD 61506-2 4941427 MATERIAL MATERIAL NAME SPECIFICATIONS LOCATION CODE 0090012 SMD RESISTOR 1/16W 560Ω±5% 0603...
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7P 2.0mm CN701 1980018 MICROPHONE SOCKET C3-6.35-24 J2,J12 1980061 EARPHONE SOCKET C3.5-01K J701 5141755 VERSION LABEL 2.00SQUARENESS WHITE LD1506DK(RU) SILVER MAINBOARD 21901-4 4941965 MATERIAL MATERIAL NAME SPECIFICATIONS LOCATION CODE 0000276 CARBON FILM RESISTOR 1/4W100Ω±5% SHAPED 10 R708 0000375 CARBON FILM RESISTOR 1/4W2.2Ω±5%...
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MATERIAL MATERIAL NAME SPECIFICATIONS LOCATION CODE 1860054 VGA SOCKER 15P VERTICAL,WITH BOLT J101 1860060 SCART SOCKET 102 STRAIGHT INSERT J102 1910163 TERMINAL SOCKET S TERMINAL D34 STRAIGHT INSERT J501 1910269 TERMINAL SOCKET 1-8.4-7 BLACK AV6-8.3-03PB2 STRINGHT INSERT 1910277 TERMINAL SOCKET J105 WITH SHIELD 24P 0.5mm SMD SUBMIT MEET WITH...
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LD1506DK(RU) SILVER SOFTWARE PROGRAM EPROM 0900404 MATERIAL MATERIAL NAME SPECIFICATIONS LOCATION CODE 0882153 LC21A SOIC U120 PROGRAM FLASH 0912124 MATERIAL MATERIAL NAME SPECIFICATIONS LOCATION CODE 0882923 EN29LV160AB-70TCP TSOP SOFTWARE PROGRAM EPROM 0900522 MATERIAL MATERIAL NAME SPECIFICATIONS LOCATION CODE 0883190 PM25LV020 SOP...
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