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Technics su g90

Sometimes it turns on and then it turns off. the fan wont turn on at all. but I know it works because I test it.

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6 Suggested Answers

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Posted on Jan 02, 2017

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SOURCE: over heating

make sure there is nothing within several inches of it to start off. if need be, use a small house fan pointed at the amp to help cool it, if all else fails and/or you don't want to hear the noise from the big fan; get a computer fan the same size as the one in the case. connect it in place of the fan that does not work(may have to cut/splice the wires). that should work. oh, check the voltage and whether the fan is AC or DC from the stereo. this makes a huge difference!!!! if the fan says "DC" DO NOT CONNECT AN AC FAN TO IT!!! the fan will short and BLOW UP!!!

Posted on May 23, 2008

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petraman7
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SOURCE: Technics su-Z750 Intergrated Amplifier stays in Standby

HI...
This happens when one or more components in the power amplifier section has failed.

The protect circuit keeps large DC voltages off the speakers.

The only thing you can check for before finding a tech is that the speakers are firmly connected at both ends. If they are ok, you need a tech

PLease rate my help if this helps

Posted on Nov 09, 2009

  • 1 Answer

SOURCE: my su g90 shuts off when i turn it up loud what do

Amplifiers get hot. The more you crank the volume up (or use extended for extended periods), the more current is required. When it gets hot, there is a fan motor (on the back), that should turn on. I believe your fan motor (brush) is worn out and therefore non-functional. Under this condition when the system overheats, it automatically changes mode to protect circuits.

Also note: if it works when you initially turn it on (cold) for a few minutes it should work fine...until it starts getting hot inside the case.

Posted on Jul 23, 2010

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SOURCE: Hello I have a Technics SU-V45A amp, it's about 18

See there is a problem with the volume conroller as it is 18 years old the controller has worn out replace the volume controller with a new one and you will be able to enjoy great sound again

Posted on Dec 05, 2010

  • 1212 Answers

SOURCE: What is the value of resistor R451 in Technics amplifier SU-Z25

If you are in the power supply, are you sure that one is used? 4xx series are power supply designations. Maybe numbers got transposed?
2 ways to approach it.
I am looking at an SUZ22 and an SUZ55, the power supplies are roughly the same. The closest component is R416 which is a 39 Ohm resistor. This supplies power to the flourescent display in a current limitng mode.

The alternate approach is where is it in the circuit? what is "downstream of it"?

If it was a larger 1 Watt or 2 Watt Try 1500 Ohms.

If it is the flourescent display, 39 ohms is most probable for manufacturer inventory purposes. If LCD, try 390.

If the preamp is downstream, it is not going to require a great deal of power, and you may be able to trace a parallel trace off the other channel to a corresponding resistor. If that has been tried and it just traces back to the same point, Try 1500 Ohms.

Also, there is symetry in the amplifier because it uses a split supply Vcc- and Vcc+ Not to mentione the symetry between right and left channels.

Posted on Jul 05, 2012

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1 Answer

I have a technics amplifiers SU-G90 After it is on for a few minutes I think something gets hot and it will go off. Any Help ?


check for bad solder connections on the amp IC's and voltage regulator - really common problem with technics amps

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Free download pdf technics su-g90 service manual


Before somebody can help you you need to give us the make and model number. You have the unit and know what it is, we don't. You can search the web and find it with the needed information.

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On my Technics SU-G90 where do I connect the subwoofer


Some amps have a single RCA socket for a powered sub. If it has not got one of these then the amp has no output for a powered sub. If so then you can only use a none powered subwoofer, which will connect via the speakers of the amp, see the subwoofer manual for how to do this.

Feb 18, 2014 | Audio Players & Recorders

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How do i turn the mute off on my su-g90 with no remote


If increasing the volume doesn't do it then you will need a remote I think. You could go for a universal if you can't get an original.

Oct 24, 2013 | Technics Audio Players & Recorders

1 Answer

How do i turn off the mute on a su-g90 with no remote


I don't know what a su-g90 is so this is a solution for most products that have a remote control. All competently designed electronics have an intelligent default or start up condition when first powered up. This means normal and most appropriate operation conditions will be in effect when you first plug it in. In your case the amplifier will be in normal operation (with no mute in effect). If you have had your amp powered up from the main power point - disconnect it for at least 5 minutes (so that it will forget its settings and reset itself) and then when you plug it back in or switch the power point on again - hopefully it will work normally. If it doesn't you might try to leave it unplugged for longer upto a day or so, and if this does not work - it is possible there is a battery back up to the device (or it runs on batteries) and a manual reset will need to be performed - this will usually be small hole in the side or underside of the item - and will be labeled reset, and a tooth pick or similar insulated pointy object is used to click the internal switch (usually a tact switch) - you would feel a click sensation.

More details of what the device is would be helpful!

Oct 24, 2013 | Technics Audio Players & Recorders

1 Answer

Technics SU-G90 reciever is on mute with no remote i dont know how it got on mute so i dont know how to turn it off


I can't find the manual but to operate certain basic functions like Power or Mute w/o a remote you walk over to it and manually operate the Power (Off/On) or turn the volume knob UP to defeat the Mute.

For a new remote:

substitute... $39 plus shipping

http://remotes.com/remotes/servlet/rs?a=gmi&smodel=SUG90&brand_pn=TECHNICS_SUG90&mode=large&uuid=A13127564179231

or

close to original... $18 (bidding)
http://cgi.ebay.com/Technics-remote-RAK-SA501P1-/160631869703?pt=Receivers_Tuners&hash=item256667d107

Aug 07, 2011 | Technics Audio Players & Recorders

1 Answer

My su g90 shuts off when i turn it up loud what do


Amplifiers get hot. The more you crank the volume up (or use extended for extended periods), the more current is required. When it gets hot, there is a fan motor (on the back), that should turn on. I believe your fan motor (brush) is worn out and therefore non-functional. Under this condition when the system overheats, it automatically changes mode to protect circuits.

Also note: if it works when you initially turn it on (cold) for a few minutes it should work fine...until it starts getting hot inside the case.

Oct 20, 2009 | Technics Audio Players & Recorders

1 Answer

Speakers cut out.


"Tapping on the unit" is the salient point that prevented me from thinking that it was a speaker impedance issue. That would indicate a solder connection problem. Unless you are qualified to work at the component level I would take your unit to someone who is as it may destroy the amplifier eventually. Steve Medley

Jan 26, 2009 | Audio Players & Recorders

1 Answer

Technics SU-G90 Amplifier from the late 80's. Unit will click off after a few minutes on. If left alone, unit sometimes clicks back on, with a loud "pop" from the speakers. Tapping the unit...


because bad connections, probably in the driver section of the endstage, dc current apears on the output and shuts down the output through the relay.
info@lustinvest.nl

Aug 25, 2008 | Audio Players & Recorders

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