Yamaha DX7 Sound Problem

Opski · 29th March 2011

Hello guys!

Need your advice - recently managed to get used Yamaha DX7 in good overall condition.

All keys are working, all patches are playing, battery voltage is 2.7V (which is OK as far as I know).

Problem: each time I am pressing any key there is a short noise (clicking/flickering) occurring before the sound has been produced, thou the actual sound is not distorted.

Anyone had this problem? How to deal with it?

DAC has to be changed? Or may be one of the op-amps? Or dirty keyboard contacts? (but all keys are producing this sound)

please help

Dylz Pillz · 2nd February 2012

Just curious is you ever found a solution to this problem. I'm having the same exact issue myself. It sounds like there's some percussive effect with a little portamento on top of the presets. Ive tried adjusting the Function parameters and that hasn't helped. No one I've talked to has any idea except that the chip is messed up somehow. This is so frustrating as I'm sure you know.

acreil · 3rd February 2012

Does it happen on the initialized sounds?

protip: this erases all the patches

Post a sample.

There's a trimpot in there (VR7) that may need to be adjusted, but I don't know what it does or how to adjust it.

verve92 · 3rd February 2012

I had this issue with my Alpha Juno. Clean contacts. 10 minute job. All better.
If that doesn't work or you don't wan to open it. take it to a local electronics repair shop or music store.
It's on all sounds, right? Not envelope snap?
Best of Luck!

29th March 2011	#1
Opski Gear interested Joined: Oct 2010 Posts: 4 Thread Starter	Yamaha DX7 Sound Problem Hello guys! Need your advice - recently managed to get used Yamaha DX7 in good overall condition. All keys are working, all patches are playing, battery voltage is 2.7V (which is OK as far as I know). Problem: each time I am pressing any key there is a short noise (clicking/flickering) occurring before the sound has been produced, thou the actual sound is not distorted. Anyone had this problem? How to deal with it? DAC has to be changed? Or may be one of the op-amps? Or dirty keyboard contacts? (but all keys are producing this sound) please help

3rd February 2012	#3
acreil Lives for gear Joined: May 2010 Posts: 723	Does it happen on the initialized sounds? protip: this erases all the patches Post a sample. There's a trimpot in there (VR7) that may need to be adjusted, but I don't know what it does or how to adjust it. __________________ New 53-EDO algorithmic composition Wanted: Kurzweil K250 power pod, Motorola MC68B09E, Korg Polysix keys. youtube, soundcloud(1), soundcloud(2), bandcamp, last.fm

3rd February 2012	#4
verve92 Lives for gear Joined: Dec 2010 Location: USA Posts: 1,199	I had this issue with my Alpha Juno. Clean contacts. 10 minute job. All better. If that doesn't work or you don't wan to open it. take it to a local electronics repair shop or music store. It's on all sounds, right? Not envelope snap? Best of Luck! __________________ Synths: DSI Mono Evolver Keyboard, Arturia MiniBrute (Pre-Ordered), Yamaha DX-7, Roland SH-01 Gaia, Roland Alpha Juno 1, DSI Prophet '08, Korg Monotribe, Yamaha AN1x, Korg X-50 Guitars: Ibanez Artcore A85 JazzBox, Ibanez SZR720BB, 1989 Gibson Les Paul Standard, 1981 Gibson ES-335, 1986 Fender JapSrat. Effects: Digitech RP1000, MXR Analog Delay, MXR Analog Stereo Chorus. Amps: Fender HR Deluxe 112, Peavey KB100 Recording: Zoom HD16 Hardware Recorder, Cubase 5, Yamaha HS50m Monitors

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2nd February 2012	#2
Dylz Pillz Gear interested Joined: Feb 2012 Posts: 5	Just curious is you ever found a solution to this problem. I'm having the same exact issue myself. It sounds like there's some percussive effect with a little portamento on top of the presets. Ive tried adjusting the Function parameters and that hasn't helped. No one I've talked to has any idea except that the chip is messed up somehow. This is so frustrating as I'm sure you know.