Question about Panasonic SA-HE90 Receiver

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After a few moments my reciever stops working and displays F70 and says to turn off system

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FIRST IMPRESSIONS: OVERHEATING.

EXAMINE VENTS ON UNIT FOR SIGNS OF LINT/DUST/ANIMAL HAIRS; EVEN IF NONE FOUND, IF YOU CAN BLOW OUT THE UNIT WITH COMPRESSED AIR (CAREFULLY) THAT COULD HELP. MAKE SURE THERE IS OPPORTUNITY FOR AIR CIRCULATION AROUND WHERE THE UNIT IS INSTALLED.

ALSO, MAKE SURE NO FRAYED SPEAKER WIRES OR ANY OPPORTUNITY THAT SOME ARE SHORTED. PUT YOUR EAR CLOSE TO EACH SPEAKER TO VERIFY THAT SOUND IS COMING OUT AND THAT IT'S NORMAL.

IF THE WIRES ARE OK BUT THERE IS ANY SPEAKER WITH A BUZZ OR ODD SOUNDS OR DISTORTION IT'S PROBABLY A FINAL AMP STAGE IN THE UNIT; THAT SPELLS REPAIR.

YOU CAN ALSO PUT AN OHMETER ON THE SPEAKERS IF YOU HAVE ONE; THEY ALL SHOULD BE ABOUT THE SAME, BUT TYPICALLY WITH A RANGE OF ABOUT 3-16 OHMS EACH.

IF YOU CONNECT ANY SMALL BATTERY, SUCH AS A DOUBLE A, TO THE SPEAKER WIRES AFTER DISCONNECTING FROM THE UNIT YOU SHOULD HEAR POPPING SOUNDS IN THEM. IF YOU DON'T, THE SPEAKER OR THE WIRE TO IT IS DEFECTIVE.

IF ALL THIS FAILS, YOU MAY BE LOOKING AT A LIVE TECH BENCH JOB

Posted on Jan 21, 2008

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Posted on Jan 02, 2017

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SOURCE: What is F70???

F70 means Blown Internal Fuse change the internal fuse and that should solve the problem if not you may have to change the output

Posted on Jun 13, 2008

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I have panasonic sa he7. My problem is error f70 overload.There was a electrical failure in my speaker. After that reciever showed f70 overload error. Fuse is not the original one. After that every ti


You may have a speaker connected that the amplifier cannot drive. Your receiver is compatible with speakers with 6-8ohm rating, however, even though your speakers may be operating within that range they may also have low sensitivity.
With the receiver turned off, disconnect the power cord for a few minutes, reconnect and then power it back on. And while you're behind the unit, that would be the convenient moment to inspect your speaker terminals...check for cracks, evidence of arcing and any stray pieces of strand wire that can touch the chassis or other terminals. If any of those conditions exist then that can a root cause of the problem and will have to be repaired.
You must also ensure that all of the chassis vents are not blocked and the unit does not have another device on top of it that also generates heat as well. In any event, keep it cool.
After that, enter into your speaker setup menu and adjust your crossover to a higher point for whichever speaker you had the failure. This will help control the overload condition, if in fact, it is being caused by your amplifier ability to drive your current speakers.

If after all of the above is performed and the condition still exists, try speakers with compatible ohm rating but higher sensitivity.

Dec 05, 2014 | Panasonic SA-HE7 Receiver

1 Answer

My STR-DE925 reciever isn't giving me any sound. When i turn it on everything works like normal, kicks on, and there is a click; but after a few seconds the display switches from whatever input it was on...


check speaker connections.sounds like the system is trying to stop some thing more serious happening by shutting itself down.a pain yes but saves blowing something up.if no luck,then definately send in for repair

Oct 17, 2010 | Sony STR-DE925

1 Answer

I have a Norge 59F-5TXW built-in cooking over which has stopped working. When I turn it on it displays the clock and all, but the Broil will only stay on low and the Bake will not go higher than 180...


F3 may be due to a failed temperature sensor or corroded connections to it, but we also see this problem often due to a failure in the control board, which can be repaired: http://www.fixyourboard.com/boards/7601P177-60.html

Jun 23, 2010 | Ovens

2 Answers

F70 displays after about 5 min of use.


According to Technics reference manual, turn the unit off, unplug for a few, plug in, turn unit on. Consult your "dealer"(authorized repair person, i guess) if light remains on. But doesn't say what f70 means, or associated with.
Unplug and open up the unit, and check the internal fuses on the circuit board. Also check for proper speaker wire hook up. Re-seat the connections. Visibly check the speaker wire runs for shorts, cracked casing, cat/dog chewing. etc.

Hope this helps.

Apr 28, 2010 | Technics SA-DX750 Receiver

1 Answer

F70 on my reciever


Most likley it is in need of repair. I suspect the output IC. Check for bad solder connections on the IC and voltage regulators.
Remove the speakers and see if it still happens (it probably will).

Feb 11, 2009 | Technics SA-DX940

1 Answer

TECHNICS SA-DX850 F70


It could be an overload from two speaker wires crossing, check the owners manual for error codes.

Dec 22, 2008 | Pioneer VSX-818V-K Receiver

2 Answers

Kenmore HE5t washer and F70 error


yes call for service anything you do may void your warrenty

Feb 18, 2008 | Kenmore 67082 Electric Dryer

1 Answer

What is F70???


F70 means Blown Internal Fuse change the internal fuse and that should solve the problem if not you may have to change the output

Oct 30, 2007 | Technics SA-DX750 Receiver

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