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LED COLOUR TV MAINTENANCE MANUAL MODEL: HLS78D-I CHASSIS(MSD6486) (take PCB for example:JUC7.820. 00192431-1) Please read this manual carefully before maintenance...
Chapter3 Main chip functions and the introductions of power supply ..................5 3-1 Main IC and functions of HLS78D-I .......................... 5 3-2 Pin function description of HLS78D-I chip and description of power supply ............6 3-2-1 MSD6486 recommended operating power conditions ..................6 3-2-2 Pin function of R842 ............................
Chapter1 Safety and notes 1-1 Installation notes (1) Please don't beat or rub, scratch the surface of the LED screen heavily, don’t touch it with your hand casually. (2) When the screen is dirty, please clean it with absorbent cotton or cotton cloth slightly. (3) Please clean it timely when water or other viscosity pollution fall, which may make the LED face or color change.
dismantle, we can take some photos of the line route for the comparison of installing. (4)After check and maintenance, please assure that there is no foreign body in the machine when install. 1-5 High-voltage warning The high-voltage of the LED screen is generated by the power supply board, without attention to exposure to the high voltage, one may meet a serious electricity shock.
Audio output IR input WIFI input ATTENTION: 1.HDMI support to 1080P; Chapter3 Main chip functions and the introductions of power supply 3-1 Main IC and functions of HLS78D-I No. Item no. Model Main function R842 Tuner output IF signal MSD6486...
UE11:LDO-3.3VS UM1: MSD6486 UA1:RT9108 UT2: R842 UE2: DC-DC 5V to 1.5V UB1:PF7911B UE5:LDO-3.3VA UE8: DC-DC UP1: NCP1251A 12V to 1.1V UM4:NAND FLASH 3-2 Pin function description of HLS78D-I chip and description of power supply 3-2-1 MSD6486 recommended operating power conditions...
3-3 Brief introduction of power supply AC input AC100-240 Use for LED backlight power supply 50/60HZ Chapter4 MSD6486 Power Block Diagram, main board power supply systems, main board interface definition and the waveform of key points This chapter mainly introduce the chassis frame diagram, power supply system, interface definition and each key point’s wave shape.
4-1 MSD6486 Power Block Diagram 4-2 Power supply system Power board has one kind of output voltage: +12VSTB. 4-2-1 Pin voltage of the voltage adjuster on the main board item No. UE11 output voltage TUN_3.3V 3.3VA 3.3VS 1.5V 1.1V TUN_3.3V 3.3VS 1.5V 3.3VA...
4-2-2 Interface definition 5V_WIFI WIFI_DM WIFI_DP GND WOW WIFI_RST L+ L- R- R+ 5VS GND IR-IN LED-R Chapter5 Software upgrade instructions Software upgrade method:Use a U disk including the upgrade program directly upgrade 1)Download the bin file:To the root directory of your USB device (Do not change the filename "MstarUpgrade.bin");Then insert the USB device to USB interface of TV set.
9、3). When update finished, TV will automatically shut down and then boot. Then Set default the TV: Setting--->Option->Restore Factory Default. Chapter6: Classical accident maintenance procedures and examples 6-1 The thinking of don’t boot The power is not connected. 6-2 Common problems for your reference To speed you to diagnose and solve problems, the following common problems are offered for your reference.
There is no audio signal input or audio No sound cable is not connected correctly Connect the audio cable correctly VGA picture display with improper The color temp is adjusted incorrectly by Readjust the color temp, or select color user the original color setting HDMI source, with snow pixel of The signal source is not normal...
Chapter7 Factory mode parameter setting instructions and notes 7-1 Enter into the factory mode Switch on TV set, and make it works normally: Press【SETTING】key on the remote control. Press number keys “3”、 “1”、 “3、 “8” on remote control to enter password. Finish entering the factory mode. If you want to quit the factory mode, Please.
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RESET ALL RESET SHOP Non-linear MODE Contrast OSD0 OSD25 OSD50 OSD75 OSD100 OverScan Input Source Left Crop Right Crop Up Crop Down Crop SSC Setting SSC MIU MIU0 Span(0.1KHz) MIU0 Step(0.01%) MIU1 Span(0.1KHz) MIU1 Step(0.01%) SSC LVDS LVDS Span LVDS Step LVDS Swing Others UART BUS...
IP is Error! CH_HLS78D-iU_V1.0001_LED32UE3000(P)Ui(T)_C320X16-E11-H(G01) Chapter8 Instructions of HLS78D-I module Circuit Schematic Diagram 8-1 Clear NAND FLASH, and set the parameters after upgrading according to the upgrade instructions. 8-2 Check each channel/source to see if the image and sound are normal.
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