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Technics sa-gx910 receiver 8A fuse on power supply circuit board blows almost instantly when turning unit on? Is this possibly power supply gone bad? Are parts for this 1990 unit still available?

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Sounds like a bad amp ic

Posted on Nov 18, 2013

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SOURCE: Fuse locations on Technics SA-DX930

This model It does not appear to have F2 anywhere, I've checked the service manual and could not find it nor is listed in the parts list.

Posted on May 14, 2008

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What would cause new fuse to blow when powering on (Sony STR-DN1030 Receiver).


Look in the circuit board area where the power cord mates with it for capacitors that have bulging tops (instead of the flat tops that are normal). If you see even one, you need to replace all the large capacitors othe power supply section (normally around 5 or 6).

Dec 08, 2014 | Sony STR-DN1030 7.2-Ch. Wi-Fi Network A/V...

4 Answers

Fuse locations on Technics SA-DX930


Hi,

I have got a service manual for you which will help you out.Please CLICK HERE

Goodluck..

May 14, 2008 | Technics SA-DX930 Receiver

2 Answers

I have a Technics SA - DX750 Amp Everytime I turn it on I get an error message F70 and then it requests that I turn the power off. This is all it does now, so sound. How do I solve this issue I have...


Hi!

The F70 error certainly indicates a blown fuse inside.
The real problem is why the fuse is blown: there are only two possible reasons
1. there is a short circuit on the output (lines or speakers)
2. you have a blown output transistor (and that means some work and skills to replace).


To be sure, please change the fuse with a same rated fuse (buy more than one because it can blow again). Disconnect the speakers and turn the amp on. If the fuse blows again, it is sure something wrong with the output transistors. If the fuse remains ok, then please check all the wiring to the speakers.

Hope it helped.

Regards,

Bogdan

Aug 21, 2011 | Technics SA-DX950 Receiver

1 Answer

Right speaker does not work on both A and B


Before doing anything else swap the speaker connections over to make sure that the problem is in the amp and not the speaker / speaker cable.
If that doesn't solve it then it is most likely an internal fuse blown on the amplifier circuit board - they are little tiny glass ones, obtainable from most tv repair shops, but it is important to get the right power rating. Also some of these fuses are 'quick blow' (go instantly there is a fault) others are 'slow' or 'time' blow - take a second or two before they actually blow - make sure you get the right one (timed usually have the letter T next to the power rating)

Mar 22, 2011 | Technics SA-DX930 Receiver

1 Answer

Fan quit working. Is it likely the board, or the fan? Currently have a Radio Shack fan mounted; it's 120v, plugged into the AUX power on the back of the unit. It's noisy, otherwise unit works and runs...


Hi, Have got and still use a Technics SA-GX910 Dolby Amp. It had an overheating problem too due to Air temp and power drain etc and the internal fan only engaged at certain volume level. Overheating was overcome by adding another internal fan.
Your unit however might need a bit more of a fix-me-up or throw it away

Oct 09, 2010 | Technics SA-DX1040 Receiver

2 Answers

Describe your I have a technics sa ax910 turning


1 You may have a failing power supply regulating circuit in you amplifier and the fail safe circuit is trying to protect the rest of the circuit.
2. there may be a voltage overload at the primary side of the power supply circuit which in this case is causing it to shut down.

Jan 06, 2010 | Technics Audio Players & Recorders

1 Answer

Technics SA GX910 ... powers up fine, meters and displays fine ... no sound (already checked jumpers, tape moniter, mute) light on volume control not on and headphones don't work


there is a problem in the low voltage power supply internally,or the speaker protection has kicked in.
unplug all speaker wires,and if the amp comes on,there is a shorted speaker wire somewhere.

Aug 15, 2009 | Technics Audio Players & Recorders

3 Answers

Problem with Technics SA-DX850


SA-DX750 (sister Model to SA-DX850). Showing error code F70, after a few minutes running. Checking the power rails revealed +5VA and +5VD, on the Digital Circuit Board 'A', dropping to about 2V, when fault occured. F5, T1A, on the Sub-Transformer Circuit 'M', was subject to occasional blowing. The problem was traced to an intermittent break, in the printed circuit board conductor, in the vicinity of Q1702 (+5VD regulator) collector, on the Digital Circuit Board 'A'.. Repairing this cured the problem. Note that removing F5 (above), or disconnecting CN702, CN1000A or CN904B, on the Digital Circuit board 'A', also causes this error code to be displayed. Failure of the audio output ICs, IC651 & IC801, is apparently the usual reason for this error code being dsiplayed, but it is worth checking the power rails viz. +/- 25V (Fuses F3 & F4, T6.3A, on Sub-Transformer Circuit 'M') +/- 55V, +/- 14V etc.

Aug 11, 2009 | Technics SA-DX850 Receiver

3 Answers

My technics su-a900 mk2 keeps blowing the internal fuse


Sorry but it sounds like a problem with the power supply unit.
Look for any 'burnt looking' resistors on the printed circuit board and that should give you a major clue!!

Nov 22, 2008 | Technics Audio Players & Recorders

2 Answers

Technics sadx750 and says f70 and turn power off


Technics sadx750 and says f70 and turn power off

Feb 27, 2008 | Technics SA-DX750 Receiver

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