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Dittegetnamn | Page 5 | When electronic stuff makes noise

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The latest stuff done

Generalmusic (GEM) S2R with battery problem

A friend of mine found a GEM S2R. Dead. Battery (internal NiCd) was completely dead and some leakage had occoured. A new NiMH was installed but the unit was still dead. Well, not completely dead. Some strange things appeared on the LCD, as shown in the video below.

I will probably have to clean the are on the mainboard around the battery and replace some IC´s.

The area around the battery is shown in the picture below. The blue-green powder is from the leaky battery.

GEM-S2R-battery-leaked-LCD-chips.jpg

Great links:

Thread at Gearslutz

Schematics, manual and sound-disks

Someone visiting the abandoned GEM factory

Keyboard controller connector on the Ensoniq SQ-80

Inspired by some EPS 16 Plus repair, I took some time to clean the connector of the keyboard controller (scanner) on my Ensoniq SQ-80. The SQ-80 is used as sequencer and master keyboard. Some system errors has occured, time to clean!

If you own an Ensoniq synthesizer or sampler: Take time and clean this connector.

It´s also really easy to take the unit apart. Just take some photos or notes on how everything is connected and then there is no problem getting it back into one piece.

Ensoniq SQ80 keyboard controller card.jpg

Above is the controller card. You can spot the big bad connector at the bottom. The brown one. Below is a picture with another view of the same part. Just remove the controller card and clean with anti-oxidation spray.

Ensoniq SQ80 keyboard controller card connector.jpg

Putting everything back together my SQ-80 powered up with no working display! Argh! But there was sound and all the buttons worked just fine. After some coffee and thinking the error was spotted. When cranking up the lid on the SQ-80, a part of the connector to the display was slightly jolted out of it´s position. Look at the blue wire in the picture below. After pushing it back into place, the display said hello!

Ensoniq SQ80 display connector power.jpg

The Linn 32 track midi sequencer recorder

A friend of mine had this unit in the closet. When powered on, no life at all and no diskdrive mounted. After a short repair the unit started up, even without any diskrive mounted.

How is it to use?

Well, fast! Simple yet powerful. Easy to handle. A lot of sync and trig possibilities to interface with both new and old gear. No need for reading the manual, just start to record and sequence.

Linn 32 track midi sequence recorder.jpg

The missing diskdrive and workarounds

The problem with not having any diskdrive is not really an issue. The unit itself got internel memory and battery. And if you would like to save the sequences, tape interface is available. So, just connect it to the soundcard in the computer and start saving. The diskdrive seems to be a Sony OA-D32W-11. This unit could possibly be replaced by HxC floppy emulator. Of course, a diskdrive could be obtained by Forat.

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