20 Most Recent Gemini Sound Products Gemini GPA-4000 Professional Power Amplifier Questions & Answers


One of the first things a technician does with a voltmeter it to check 'all the voltages' in a system are correct..

Even without a specific circuit diagram for the board, 'Applications Notes' for chips and seminconductors will give nominal expected voltages in a working circuit.

Remember you can burn out the meter by connecting it to any source of current when on the Ampere or Ohm settings.
Technicians usially start at a high (highest) Voltage range setting and work downwards..

Providing the maximum Voltage is not exceeded on any range, whether it is AC or DC will not damage the meter.

'Fluke' by the way are a 'top end' professional product - check the price ;)



Gemini Sound... | Answered on Nov 30, 2014


I understand your pain - was googling for similar, and came across this post, 5 years prior. My SGC Nanyo Bass Collection has just started to play silly beggars with the pots, and a bridge fault. Nowhere online seemed to have any details of the wiring, as the problem is, as you say, the fact that all of the tone and volume pots are based on a printed circuit board. If theres a nick or short on the board, its a pig to replace, and I really wouldn't like to have to wire any pots onto it. I'm currently looking at the options of ripping out the old electrics and wiring it from scratch myself. If you're still after answers, good luck!

PS - noted that none of the previous replies are relevant to this - mostly going on about the amps or a Fender guitar??!

Music | Answered on Dec 05, 2019


Hi there and cheers for examining my bio. I'm just Daryl Ibbott and I'm just residing in Arvada, CO . My own pops and good friend completed study from An In-depth & Unbaised Eat Sleep Burn Review

Music | Answered on Nov 30, 2019


Amazon
https://www.amazon.com/MT-540-Keyboard-replacement-supply-adaptor/dp/B00GQVUMEG

NewEgg
https://www.newegg.com/p/14R-02A5-01UZ4

To verify, often the voltage is stamped on the back of the keyboard, near the power jack. Should say 9V

Music | Answered on Nov 28, 2019


Try here; http://www.synthmanuals.com/manuals/technics/u90/user_manual/

Music | Answered on Nov 28, 2019


Can you please Edit or add a comment to your question, what make and model of organ is it? Have you tried it in a different AC outlet? Do any lights come on when you switch it on? Have you tried the headphone output as well as the speakers? Does it have a line output? What happens when you move the volume knob and or the swell pedal, do you hear any noise?

Music | Answered on Nov 06, 2019


Have you checked that it is not the amp that is the problem? This is a fairly common thing to have the amp heat up and the thermal protection shut it down partly. Since the bass drops, a loose connection or bad guitar cable can cause that. If the signal becomes capacitively coupled only the treble will come through and be very distorted. Try a new cable. For the guitar, open the electronics area and look for loose or broken wire.

Music | Answered on Oct 21, 2019


you found it on search on net

Music | Answered on Oct 16, 2019


The best way is to plug the send to the input then output to return of mixer

Music | Answered on Oct 11, 2019


Too many songs to be specific with your vague clue. Try Google.

Music | Answered on Oct 05, 2019


It would be nice to know what brand name and model you have there......

Music | Answered on Oct 04, 2019

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