20 Most Recent Technics SA-AX720 Receiver Questions & Answers

try emailing them.

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Purchase an AC line filter /. surge protector. Also , do you have the system connected to a Grounded AC plug ( one that has 3 holes?)

Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on; or it may turn on but produce no audio to the speakers.

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 'nekkid'. 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.

Connect the 6-channel analog outputs of the AC500 to the 6-channel analog inputs on the AX720 using 3 RCA cable pairs.

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Digital sources will enter the AC500 and be converted to 5.1 analog output.

Be advised, that input on the receiver will not allow any internal DSP manipulation. WYSIWYG.

According to my Technics SA-R210 manual to UNMUTE without the remote....do the following......PRESS BOTH THE VOL UP & DOWN CONTROLS & THE LOUDNESS SWITCH ON THE UNIT AT THE SAME TIME......Not sure it will work for your model but that is what it shows for The Technics SA-R210 model, so it should be pretty much the same

The Ohm rating is a less accurate and rather misleading reference for gauging how compatible it will be for the performance nature of a given amplifier; it is best to pay closer attention to the sensitivity rating.
That being said, the amount of load on an amplifier will increase as the signal frequency is decreased. So disabling any bass boost, loudness controls or adjusting on an equalizer the lower frequencies to a lesser amount will help remedy this.

my 812 amp is not working stand by is blinking please help me

Hi.

The buzzing sound alone may have been caused by a bad grounding, or a contact, but the clicking noise makes me think that there may be a faulty component, and that the click is coming from the protection circuit inside the receiver.

Test the unit on a different socket, unplugging any other connection.

Double check speakers and all connector. Even a short caused by a copper fibre on any of the connector will cause same problem.

If there is nothing evident in connections, and if connecting to a different socket does not help, then there is an internal fault.

In that case the unit must be tested thouroughly by a technician.

Since the repair won't be less than $80 ( could be more if troubleshooting takes time), you may decide to replace the unit, rather than repairing.
Here a broken unit for spares: SA-AX720 stereo Receiver tuner, amplifier -100 watt.

If you want a second hand Technics to fill the gap in a technics rack, check the links below.Technics Sa-4046
Technics Sa-gx100
Receiver Sa-ex110
Technics Sa-500

Call Technics and ask a quote on repair, sometimes the manufacturer can also offer a deal, exchanging older unit for a discount on new one, even out of warrany. Asking does not cost anything.

Do not forget to leave feedback.

Thanks.

The overload indication tells us that there is a problem in the final stage of the amplifier section. This model uses an AMP-PAC or large amplifier IC (part number RSN-3305) which is now defective. If you can solder, try resoldering the pins on this IC. Sometimes a poor solder connection can cause a voltage offset that will be detected as a fault and shutdown the system like this. If the resoldering fails, the IC will need to be replaced. Parts cost will be in the $75-$95 range.

Dan

You can download them, depending where you are, I have one!

quick solution is to go down to radio shack and get a small amp.  They have them for under a $100.00 bucks. The connection is from the mini jack to stereo RCA's for greatest ease and flexibility.  You can also go to a good music shop like Guitar Center and see what they have used.

I too have a Technics SA-GX100 and it's rated at 2 x 40W @ 8 Ohms. I have the Technics SB-2840 floor model speakers hooked to it, which are rated at 200W Music Input - 8 ohms. It sounds very nice just to be a 40W receiver.