Question about Yamaha HTR-5840 Receiver

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Will not turn on, no sign of life,

Will not turn on no sign of life mains to power supply and fuse ok about 60 volts ac out

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Where is this 60V being mesured from?

Posted on May 12, 2010

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What AC voltage should you have to the board . If it is mains power then something has been fried.

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The generator produce onely 73 volts ac on the 120 volts plug and 146 volts ac on the 220 volts plug . what could be causing this problem


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My DVR 433 H-K does not power up. Already checked the 220V AC power cable. Everything OK with the cable. I suspect it is the fuse in FU01. What do you think ?


If the DVR is dead it could be the primary fuse.Typically its a 1.25Amp fuse.But remember a fuse does not blow with out provocation, there might be a short circuit else ware esp: the regulator chip.
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TV set appears to be 'dead'


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1 Answer

Tv won't turn on


I assume you do not have any red light showing on the front of the TV to indicate it is receiving power? Again assuming the your mains electric supply is functioning & the fuse in the TV plug is ok, if there are no signs of life & then most likely a fuse in the power supply may have blown. If you have a multimeter you could remove the rear of the TV & check the fuses in the power supply, if these are ok then you will need to check any supply voltages coming from the power board. If one of the fuses are open circuit, check some of the doides or transistors for any short circuits. If you are not comfortable doing this, then it would be advisible to contact a repair service centre.

Jul 28, 2009 | Televison & Video

1 Answer

AC Breaker trips and AC Fan turns slow.


Sounds like you have a bad capacitor for your squirrel cage fan , now as for the a/c unit sounds like you have a direct short in compressor to ground or leg to leg , check all wiring to make sure that it is not grounding out or melted together.

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2 Answers

No power/RCA ctc187cl


Check for 5 volts present at pins of EEPROM IC. ( 8 pin-center
front) = no 5 volts = Re-check power supply components such as AC in resistor 2.7 Ohm ?....Or 5 volts ok,then suspect EEPROM corrupted........part # 223957 ( install 8-pin socket,then re-plug in original, if that doesn't clear it, plug in
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can get it.....Let me know....T.

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1 Answer

Electricity went out in town, tv won't turn back on.


On this type of problem, the first thing I check is the AC line fuse on the power supply. Follow the Ac plug wire to the power supply board and where it plugs in, you will find the fuse. If: Then: It checks bad. Replace it. It goes out again. Call a Servicer. It is good. Check for the five volts that goes to the Main PCB. No five volts, change the power suppy (SMPS) Five volts is there, more than likely the Main needs replaced and SMPS. For a Samsung Servicer in your area: 1-800-SAMSUNG

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2 Answers

Dvd player is completely dead.


First thing to check is the power cord with it unpluged. Do you get a resistance there or is it open?? If its no reading at all then the power transformer or fuse or current limiter resistor is open. If you do get a reading then you know your power transformer primary is good. Next measure the AC volts comming from the secondary of the transformer. AC volts? Good! Now Find pin 1 or the end pins on the microprocessor. 5 volts present?? No theres your problem get a schematic and troubleshoot the power supply. Yes 5 volts? Measure the display any volts on it?? Ok im sure by now your gonna say no to one of these and like I said get a schematic and conferm all the voltages are present in the power supply. Most common dead problem in dvd/cd players is the power supply ie transformer,regulator, ic, ect, ect. Good Luck

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