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I have a Technics Integrated Amplifier SU-G70. It plays great, but keeps switching from CD to Tuner. It will play for about five minutes in each mode and switch back and forth. What do you that the problem is.

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If you feel comfortable doing so, (and it is no longer under warranty) pull off the case and make sure there are no loose wires, or no wires touching.

If this unit was recently purchased, I highlyl advise taking it bakc ot the placeof purchase for replacement or repair. Also, if there are any internal or external fuses, make sure none of them are blown, and make sure this is being plugged into a surge protector, and not just a wall outlet.

carsandcomps,

Guru, Premium Expert @ Fixya.com

Posted on May 29, 2010

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I have a technics hifi su-ch900 everytime I play a cd or cassette or have the tuner the sound cuts out when its slightly loud, on low volume its fine. I have checked the cables and they are correctly...


I found a link to a CH900 that switched off completely.
If you are not a technician, please don't open the amplifier.
But I think it will be a simple repair. It is not the same problem, but it looks a little simelar.

http://www.electronicspoint.com/technics-su-ch900-switching-off-t53309.html

Also found a service manual, but not complete. Still here is the link

http://elektrotanya.com/technics_su-ch900.pdf/download.html

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I had the same issue.the contacts on selector switch is dirty.All u need to get a good contact cleaner and spray the selector rod( remove knob first with preamp facing up), the liguid will find leak into selector and clean contacts.
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Well it sounds like your amplifier IC's are working correctly since you are hearing that pop. I have the same amplifier and every 10db increment it pops. Have you tried every input? Possibly try starting at a low volume, plug an RCA plug into CD or any other input, and touch the center prong of the other end of the cable. You should get a 60hz hum if your in the USA, otherwise it will be 50-55hz. Regardless it should make noise.

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hi,
For connecting these to your amplifier you need 4 Stereo RCA Cable.
1.Connection for cd:
Take one of the RCA cable connect the one end (red/white) jack to the line out of your cd and connect the other end (red/white) to the CD input of Your amplifier.
2. Connecting the tunner:
Take one of the RCA cable and connect the one end (red/white) jack to the line output of you Tuner and connect the other end (red/white) to the TUNER input of your amplifier.
3. Connectiong the tape deck:
Now you have two RCA cable. Take one of the RCA cable and connect the one end (red/white) jacks to the PLAY out of the Tape deck and connect the other end (red/white) to the TAPE 1 play input of your amplifier.
Now connect the last RCA cable. Connect the one end (red/white) jack to the record input of the TAPE deck And connect the other end (red/white) to the TAPE 1 Record input of your amplifier.(this connection will help you to record to tape from cd or tuner. if you are not interested in recording then you can avoid this connection.)

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ok

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1 Answer

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