Question about Technics SA-EX500 Receiver

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Technics tuner amplifier sa-eh750 makes crunching noise and f61 comes up on desplay

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I want to change the language on technics hi fi sa/eh750 to english

Posted on Jun 01, 2010

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The make of the amplifier is Technics stereo tuner amplifier and the model No is...


Quite often a receiver or amplifier will show the message "protection" or "protector". Other times, the unit will return to the standby mode and possibly blink the standby light. This is a protective mode that causes the shutdown of the unit to "protect" it from further damage.

Most modern electronics contain additional circuits that monitor the state of the unit. If a problem is detected, the unit is shutdown and a message of some type is displayed as detailed above. This is done to prevent further damage to either the unit itself or any external speakers or equipment.

Lets determine whether the problem is internal or external:
1) Disconnect any external equipment (speakers are the most common).
2) Power off the unit.
3) Turn it on again (this will reset the protection circuit)

If the protection message clears, the external equipment is the likely cause. Crossed speaker wires is the most common cause. If the unit continues to display the protection message, then the problem is internal and the unit will require service.

The most common internal cause is a failure of the output transistors. These can be easily replaces by an experienced service tech. Some units have complete amplifier sections contained within amp-pacs or large ICs often called STKs. They are so called because the generic part numbers for tehm are often STK-xxx. Panasonic uses large ICs with part numbers that start with SVI as well. If you are experienced with audio repair, a simple check of the transistors and the voltage regulators within the same circuit can often reveal teh cause of the problems.

Hope this helps,

Dan

on Dec 30, 2010 | Audio Players & Recorders

1 Answer

What errore code f61 means on technics sa eh750 amplificator?


Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it '*****'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Aug 04, 2011 | Audio Players & Recorders

1 Answer

I need a manual for a SA EH750 stereo system


You can download the service manual from here:

http://elektrotanya.com/technics_sa-eh750.pdf/download.html

Please wait until the page is appeared fully then click on this place:

Get Manual
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allowed a day

and the downloading will begin.
Thanks.
gylacz

Jul 15, 2011 | Technics Audio Players & Recorders

1 Answer

I have got the technics SH-EH550 UNIT, but i want to utilise the suround sound functions of the SH-EH750 unit on my system. is it just a case of unplug the EH550 unit and replace that with the EH750 unit...


Hi,
As you stated technics SH-EH550 UNIT can be replaced with SH-EH750 unit ,
Since this unit has the main power Amplifier with suround sound functions in it,you do not need the other units unless you do not plan to use..

Hope this helps!..if more help requires pls let me know.

Jul 07, 2011 | Audio Players & Recorders

7 Answers

Panasonic SA VK550 - F61 eror


Hi, i had the same problem with a panasonic player, when you see the code F61 in the screen it is because the audio output IC is defective,change that and the set will work perfectly. hope it work.

Feb 05, 2008 | Panasonic SC-AK33 CD Shelf System

2 Answers

F61


i had the same problem with the error code f61.There are 2 fans,1 external and 1 internal and were both working but were very clogged up with dust thus working harder.Try cleaning them both it worked for me on the SA-HT 990 model

Jan 10, 2008 | Panasonic sa-ht800V Home Theater Audio...

1 Answer

Cuts out


Check your speakers. your speaker may be defective

Dec 17, 2007 | Technics SUV500 2-Channel Amplifier

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