Digital.Complex: Logicon - Digital.Complex

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#1 User is offline   aotsukisho 

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Posted 07 March 2012 - 10:08 AM

Our AC isn't working, so I took apart the logicon and resoldered it. The AC still doesn't work, but the joints inside the unit are strong for another 20 years.

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the unit still in the car. The wire is soldered into the box, and the harness itself has a detachable plug...

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removed the unit on the back of the box

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socket opening

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opening up the box

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it's like I'm back in high school electronics all over again

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very low silicon count.

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original solder job. note the solder-filled screwheads, sneaky Mazda

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I'm sure you can tell which ones are the new ones

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now to remove the unit still in the car

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with some pliers-related convincing, the pcb comes out

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Toshiba 1.5A bridge drivers for the HVAC motors

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removing the front unit

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with the faceplate off. Those are 20 year old LEDs, yessir.

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resoldered switches, desoldered LEDs

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very easy to remove

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to my pleasant surprise, 3mm LEDs snap in very nicely in the bottom of the array.

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line them all up first

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then snap in the spacer (that no longer spaces), and screw it down

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solder in the new LEDs

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soldering finished

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testing

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with the faceplate back on

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Now to address the slider LEDs

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they use an unusual form factor that simply slides into the switch

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testing the cap fitment with a standard 3mm LED in there

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need to drill out the cap slightly with 1/8" bit

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3mm LEDs in place. I needed to shave another 'flat spot' on the case for it to squeeze between the plastic prongs.

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also did an LED replacement for the backlight bulbs.

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final view in the car. Looks great.
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