Question about Harman Kardon AVR 100

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AVR 110 turns on and then off right away

AVR 110 turns on and then after 1-2 seconds clicks back off. Checked all fuses I could find inside (5) and they all are intact.

FIrst couple of times this happened unit would stay on for 5 minutes then shut off. I would push power button and then picked up the front of the unit a couple of inches and dropped it. This banged it into working.

Does anyone have any idea as to what this could be???

Thanks!!

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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SOURCE: Harman Kardon AVR 120 turns off by itself after normal work for about 1 min

Do you get an indication on the display where the point of failure might be? It would show up on the LCD speaker diagrams just before shutting off.

Posted on Dec 28, 2007

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robotek
  • 1512 Answers

SOURCE: unit wont turn on

.Hi jepenny

The board you are looking at is the standby cct and power switching PCB. It sounds like that is working, so you have probably lost power to the transformer primary or the transformer is open circuit. Check for blown fuses and replace with exact same type and rating.

Be sure to unplug at the wall before touching any internals!!

If you can find no blown fuses, the power transformer may have failed. Good luck, get back to me here is you need any more advice. Thanks for using "FixYa"

regards
Graeme

Posted on Feb 18, 2008

SOURCE: will no turn on

i HAVE THE SAME PROBLEN. CAN ANYONE HELP PLEAZZZZZ!!!!!!!

Posted on Mar 19, 2008

alank44
  • 4 Answers

SOURCE: Harman Kardon AVR 146 shuts off after 10 seconds by itself

wrong ohm speakers

Posted on Mar 13, 2009

  • 4 Answers

SOURCE: Humming sound(speakers)when HK AVR 3550 is powered up?

yea try use in a monster power strip it clears al of that up it is picking up noise from all the wires

Posted on Apr 02, 2009

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1 Answer

Fender passport


Not necessarily sometimes the transformer go South but TEST the fuse with a multitester and make sure it is intact. If it stays dead then give it burial except you know of somebody that tinker with it

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Toshiba 57H81 Flashing Red Power Light, Blown Fused F850+F852


Solved by resoldering some solder joints!!!!!!!
********
Toshiba Model 57H81 Rear Projection TV - Purchased 11-09-2001

Problem: Toshiba 57H81 Flashing Red Power Light, No Picture/Sound, Blown Fuses F850 + F852

Symptoms January, 2009:

  • Upon turning on set I got flashing red power light and nothing else.
  • Removing plug for one minute and plugging in results in:
    • Audible click, steady red power light for 2 seconds then slow flashing red light
    • Pushing power button results in steady red for about 2 seconds then slow flashing red light, no other set activity
  • Removing power cord for several hours and plugging back in made no change
    • Audible click, steady red for about 2 seconds then slow flashing red light
  • Possible related note: Over past several months occasionally the entire screen would flicker momentarily and at other times be problem free for weeks.
  • Fuses F850 and F852 found blown

Repairs Made:
  • PD0074 DEF/CON Power Board
    • There are two main power supply capacitors in this set. They are C-809 and C-810. One their negative lead on the printed circuit board re-soldered leads and nearby contacts. I’m told that because the factory left out a printed circuit board eyelet, the connection will come loose over time. When I called Toshiba customer service they said there was a known solder joint problem causing blinking red light.
    • Replaced blown fuses F850 and F852.
      • I actually installed a fuse panel on the inside of the cabinet and routed the fuse connections here instead of ordering the special fuses and replacing them on the circuit board.
      • Had to use a 5 Amp SLO-BLOW for F850. Fast blow does not survive power up. Get the red blinking light.
      • Used a fast blow 2 Amp for F852.
  • PD0073 SIGNAL Board
    • Re-soldered Q751 + Q752 STK392-110 Convergence Amps
    • Re-soldered adjacent pads that looks suspicious

Total Cost to Repair about $10
  • Twelve hours of my time over three days to research issue, disassemble set, make repairs, add fuse panel.
  • Already owned Service Manual and Circuit diagrams from a different 2004 repair.
  • Less than ten dollars at Radio Shack for fuses and fuse panel. Already had wires, etc.
  • Some solder. Already owned de-soldering tools, etc.
  • Visited both local authorized Toshiba factory service repair facilities. One said repair would have to include replacing Q751 + Q752 STK392-110 Convergence Amps with ST392-180, and realigning set for a total of $500+ and it would be more if they had to order a power board. NO THANK YOU! Other shop said $65 for site visit and $30 to make an estimate that could be applied to repair.

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1 Answer

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Unplug the receiver first, then take off the top and follow the A/C cord into the unit. It should go right to the fuse, or it will go to the transformer and then the fuse. It should be a glass fuse for this unit, about an inch or so long and in a cylinder shape with metal tabs on each end. You can usually tell if it is good just by looking at it. If the glass area looks a little black it is bad, if it is clear you need to look very close and see if the filament inside is intact and not broken or separated at any point. A clear fuse can still be bad, that's why you need to look close. If the filament is in good shape, it is probable good.

If you replace the fuse and then plug it back in and turn it on, and then it blows the fuse again, please do not keep trying to turn it on or put in a higher rated fuse. It will only damage the unit further. You will need to have it checked by a service technician, it probably has a blown channel and replacing the fuse over and over again will only damage more parts.

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Your unit was probably damaged in shipping. Denon is a nice unit! Do you hear any clicks when you hit the power button??? You should hear two relay clicks. You should hear the power relay click at power on and 3 to 5 seconds later you should hear the speaker protection relay click if your audio amp section is ok. If you hear both relays click then your display circuit is at fault. Open the unit and look for breaks on the front pcb (behind the display) and on the main board in the power section ( where the fuses are ).
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barneyluc

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