Question about NAD C425 Am Tuner Tuner

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Sansui G-5500 I need to find Parts for this unit. One channel needs the power amp? I had this part replaced before and I'm not sure if I got the part name right. It's the big black thing that runs the amp, there's one for each channel. Can you please help me with this? Thanks, Ed

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Re: Sansui G-5500 - NAD C425 Am Tuner Tuner Audio & Video Receivers


Posted on Mar 24, 2008

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Determine if an analog receiver has blown a channel

When you need to replace the output transistors, do them both at the same time with a matched pair. That way you won't unbalance the power supply and will be assured of the same power out is available on both channels.

Feb 18, 2016 | Sansui Audio & Video Receivers

1 Answer

Proper procedure for hook up to Au 719 sansui amp

This is an integrated amplifier so you connect both of your speakers to the speaker outputs making sure that you keep them in phase. Red or plus terminal on speaker to red or plus terminal on Amp and the same with the other channel. Then connect your input devices as they are marked on the rear of the amp. You didn't mention what devices you are trying to connect to it so give additional info if you need more help.

Mar 24, 2011 | Audio & Video Receivers

1 Answer

Sansuo qrx-5500, kenwood ka-5002 amplifier, and a self powered sub. What is the best way to hook this items together?

Depends what you want to do with those three units. Can you elaborate?

For example, what speakers will be on each?

What model of sub? I'm sure its manual would tell you how to connect it to an amp that has no specific subwoofer output.

Feb 07, 2011 | Sansui Audio & Video Receivers

1 Answer

I have a Sansui receiver Model RZ-1000. The left channel is out. Cheaper to repair? or just buy another similar on ebay?

I have this unit. It is built with disable links for each of the channels, which are easy to replace. The replacement part is only a few dollars.

Oct 11, 2010 | Sansui RZ-5200AV Receiver

2 Answers

I have a 1977 sansui 7070 right channel only starts to work when balance is all the way to the right and 80% volume, channel works in mono any Ideas

The fact that the channel works in mono mode indicates that the output amplifier section is working correctly. The problem is in the front end. This can be as simple as a bad control, or the stereo separation circuit. Without seeing the unit and testing some components inside, this will be a difficult problem to solve remotely. The expensive parts are usually in the output amp section, so this repair should not be expensive from a parts perspective. I would budget around $20 for parts and have a repair shop take a look. I work on units of this vintage all the time, and usually the problem is a failing transistor or cap in the front end. Finding it is the problem not replacing it. Look for a shop with experience with this vintage.

Keep us posted.


Sep 03, 2009 | Audio & Video Receivers

2 Answers

Old sansui amp BA-FI turn it on an it blowes the 8 amp fuse instenly

Hi again,

You might have need for the following information:
Hope this be of additional help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

Oct 30, 2008 | Audio & Video Receivers

1 Answer

Sansui synthesizer tuner T-909. Tuner keeps on going off-station and making a horrific static/hissing/white noise. Have taken a look inside, and replaced the crumbling leads into the pre-amp. There is some...

It sounds like there is a transistor that is breaking down because of heat. With the unit placed away from the amp, there is less heat. This unit needs a quick overhaul. If a tech can reproduce the problem, the use of a "freeze" spray will make finding the problem transistor easy. Figure on $5-$10 in parts plus the local labor rate for the total repair.


Sep 12, 2008 | Sansui Audio & Video Receivers

1 Answer

I own a classic Sansui intergrated amplifier (AU-717). It has a short in one channel. At low volume, the sound shorts out. I've had this unit for about 20 years now. Otherwise, it's a great product!

Hi mellemcee

Cool amp mate, and becoming collectable now to. Sansui amps from the era where the best in the world of HiFi. iT may have lost bias control to the offending channel, it may have dirty source switches, tape monitor switch, or even speaker switching. The speaker protection relay may also have a dirty contact, will usually burst back into life with a quick rotation of the vol control. Can you pin the problem down a little more with the info i have given you, try all the controls to see if it impacts on operations, you will need to fix those problems first. Low bias would make that channel sound distorted at low levels also. Is this what is happening to you??


Apr 18, 2008 | Audio & Video Receivers

1 Answer

I need a power switch for a Sansui 5000a Part number MSH501X, 125V, 3 Amp


not to sure if any help but you could try here or email them see if they can locate one for you, Vintage Sansui stereo parts & salvage units for receivers.


Mar 20, 2008 | Audio & Video Receivers

5 Answers

Marantz SR18-no sound

I have worked exclusivly on marantz recievers, for the last seven years, the loud 'pop' you heard, and smoke, was 90% that one of the amplifier channels, on the amp block, has blown, and consiquently the unit stays in protect mode. It will power up, and decode audio, and even show an f.m. stereo on the tuner, but you won't get the 'happy click' of the protection relays, until the channel is repaired. also replace the 5fd memory capacitor on the front micro board behind the front panel. If you have someone repair the channel, make sure that the tech resolders all of the connections on the molex connectors on the amp block. there are 10 of them, five male and five female, The bad solder on these are what caused the problem in the first place.

Nov 29, 2007 | Marantz SR-18EX Receiver

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