Question about Panasonic SA-HE100 Receiver
When I power up it displays switch off overload, even with everything disconnected.
I was able to fix this problem by replacing a fuse. Remove the cover (7 screws). Directly behind the fan are 2 boards with 5 fuses on them. The boards are 1 over the other. The fuse I replaced was labeled F5 and on the top board with the fuse facing down on the underside of the board. This also fixes the error code F70. The fuse is 8 amp, 125 volt and not available at Radio Shack.
Posted on Jun 23, 2008
Check Connections on Output Ic,s Ic651 and
( Only if you are a Qualified Tech }
Usally these have to be replace 120.00 each approx in parts .
Labour ?? 80 to 120.00
Posted on Apr 30, 2008
HI' YOU KNOW WHAT?I HAD THE SAME PROBLEM..WHAT HAPPEN IS MY ORIGINAL FRONT SPEAKERS WIRES WERE TOO THIN,I HAD TO CHANGE TO THICK WIRES NOW IS ALL GOOD.DO THAT THEN EMAIL ME BACK AND LET ME KNOW(PRINTER572000@YAHOO.COM..GOODLUCK..
Posted on Feb 23, 2008
I had the same problem, in that the receiver would automatically shut down displaying the "overload" message. I checked the 5 fuses inside, as well as ensured that the fan was working. I was using six 4ohm speakers + subwoofer. All the speakers other than the rear center channel and subwoofer were ceiling mounted in the room.
However, I decided to check the overall impediences of each speaker line to ensure that there wasn't an issue with the speakers. It turns out that the net imediances of the four corner speakers and the front center speaker were 5.7ohms because of resistance in the long lengths of speaker wire I had. However, the impediance of the rear center speaker was only 4.7ohm -- because the speaker line was much shorter.
Thus, the quick solution: ensure that all the speaker line lenghts are the same, (to ensure that the overall imediances of all the speakers are the same). Once I did that, the receiver started working beautifully -- full loudness surround sound working fantastic.
Posted on Dec 27, 2009
First: Never power up any amp with no load. Second, if possible, test the speakers themselves with a multimeter. You should get a reading of a few ohms on each...but not a direct short nor an open. Unplug the unit from the wall and repower it. It may reset something. If this doesn't resolve the issue, you've got a repair bill.
Posted on Dec 28, 2007
Tips for a great answer:
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Overload in other unit protect error code. This will appear once the processor sense a malfunction
either on the power supply or on the load (high chance is the output IC). DIY
steps are as follow to determine where the fault is : 1. Allow the unit to cool
down for an hour. Give proper
ventilation and keep away all
obstruction from the vent to have a sufficient air flow. 2. Disconnect one at a
time the speakers, inputs, from the unit while powering it on.
If the unit back to normal again then you've confirmed that any of
the above caused the error code. If #1 is the caused, you have to check also
the exhaust fan(if installed), clean it
as much as possible, replaced if faulty. If #2 is the caused (speaker) check
the wire and speakers for short,
(input) check the RCA cord for short or replaced if necessary.
If the above simple fix didn't cure the error code, you can try
the next steps if you are an electronicsenthusiast.
Now after removing the cover, you have to concentrate first on the power supply
board. Look for bulged electrolytic capacitor. Leaky
capacitor will affect the regulation
of the supply and will
trigger the error code. Look for dry
joints. Check it also in the pre-amplifier stage, main output board where a
big heat sink is located. Next disable the output amplifier stage by
disconnecting the supply. If the unit come out, make some re-soldering on the
board, spot the cold solder and dry joints and then try to connect
again. If the error code appear again, high chance that your output IC is faulty but still to be confirmed.
Using the disoldering pump and soldering iron pull-out the output IC from the board then try
the unit. If the error code disappear, confirmed that your IC is faulty.After
trying the abovesteps-by-steps guide and
still the symptoms persist this is the time for you to send it to repair shop. Remember that your
unit has a lot of parts and only some basic steps have done, leave the expert to troubleshoot the entire unit.
Hope I helped you.
Have a nice day!
Thanks for using Fixya.
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