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Ensoniq® SQ-2 Disassembly
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To change the Ensoniq SQ-2's battery, first take off the keyboard's bottom cover, seen here.

Remove ALL the bottom screws except those that attach the feet.

 

Ensoniq SQ-2 Bottom Cover

Once the cover is removed, you'll see the Main Printed Circuit Board, which holds the backup battery.

Under The Hood

We need to flip over this board so we can de-solder the battery from the underside.

The first step is to unplug two connectors from the Main board.

Ensoniq SQ-2 Main PCB

Gently rock the two, multi-pin connectors, seen here, off of their matching header pins.

Notice that the backup battery is near the 10-pin connector.

Miniature Connectors

Next, remove five hex nuts from the rear panel jacks seen here.

A 9/16" hex nut driver is helpful.

Hex Jack Nuts

Then, remove one screw (right) from the rear panel.  It attaches to a PCB mounting brace.

Rear-panel PCB Screw

Ensoniq® SQ-2
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