Question about Hitachi 61SDX01B 61" Rear Projection Television

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No audio, no video

My house got hit by lightning, even though I had a surge protector it affected my TV. The fuse on the power supply circuit board is good. It has several LED's illuminated on the power supply circuit board, but the rest of the TV shows no sign of power getting to it. Need a suggestion, thank you.

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  • antevi Sep 26, 2007

    On the Power Supply Board all LED's come on, but there is one LED (D913) that only blinks twice, with less intensity the second time, after that initial blinking it never comes on.
    On one of the main boards (DPOX Deflection P.W.B.)there is another LED (DP37) that never comes on, and it is near the IC STR F6629B, any suggestions.

  • antevi Oct 08, 2007

    This is what I have done so far, I change the convergence IC's STD 392-110. No help.

    For troubleshooting purpose, I removed the bigger black jumper from the middle boards, then I turn TV on and I get audio just fine. Should I still change E993, D911, & C917 ?, since they are related to audio.
    I will try changing them, but I noticed D911 is actually a part of ED91, its set up on top, I would imaging I will desolder from the top, not from the circuit board.

  • antevi Oct 09, 2007

    LED DP37 (red) on the live section of deflection board does not come on.
    LED DP29 (GREEN) on the cold section of deflection board does not come on.
    LED D913 on power supply board blinks only twice when I turn the TV on and then it remains off.
    Fuse E993 is good. Should I still change D911 and C917 ?

  • antevi Oct 10, 2007

    service manual, troubleshooting section leads me to check voltage at pin 4 of IP01, and it should be between 14V and 18V. I have less than 3 volts at pin 4 of IP01. So, with this scenario, then it leads me to check zener diode DP04, resistors RP02 and RP03, and capacitor CP05.
    The resistors are good. I do not know about the capacitor or the zener diode.
    The capacitor CP05 is no longer available, I can not get it any where. I hope it is good.
    I also replaced the IC STR F6629B (IP01), but no help.



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Can you find out what Led is not on or which comes up and goes out? Most of these sets have convergence problems. Or Power Regulators.

Posted on Sep 23, 2007

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  • Lashawn Robinson Oct 08, 2007

    Audio Rear and Center 29V Regulator SW+29V indicated by D913 (DP-06 and DP07 Only)
    The Audio Rear and Center 29V supply is generated from pin (16) of T901. This output is protected by E993, rectified by D911 and filtered by C917. This supply is routed to the Rear Audio Output IC IS16 and Center Audio Output IC IC15.
    This voltage is what illuminates the Green Visual Trouble Shooting LED, D913. So change E993, D911, and C917 first.

  • Lashawn Robinson Oct 09, 2007

    Yes E993 is a fuse, you can check it, D911 is a diode, it can leak and not show up when testing, I read again what you said at first and second and want to get it straight. Now what LED's are lit? And which goes out? This could mean that there is a problem in that area, but not enough to cause the set to stop working. My mistake, check the fuse though, let me know again the ones that stay on.

  • Lashawn Robinson Oct 10, 2007

    OK,DP37 Indicating Vcc applied to the Power Supply Driver IC IP01 Colored RED
    This LED indicates any of three different scenarios,Is there B+ (Vcc) available to the Deflection Power Supply Driver IC? LED will be ON. Is the B+ (Vcc) available to the Deflection Power Supply Driver IC missing? LED will be OFF.
    Is the Set in Shut Down? LED will be OFF.
    As can be see, there are two different scenarios that can cause DP37 to be off, (1) Missing Start up voltage for the Driver IC and/or (2) the Deflection Power Supply is in Shut Down.



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Whenever a power outage occurs, quickly power off (or better, unplug) any/all computers, TVs,
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