Commodore C386SX-LT

Resources

Wiki – no wiki page exists for this machine
classicomputer.de

Please compare with Commodore C286-LT.

Internals

Motherboard

2MB Memory Module

LCD Screen

Sanyo LCM-5474

Backlight Power Inverter Module

Hard Drive

43MB Toshiba MK1122FC is HDD type 17 in BIOS.

Floppy Disk Drive

TEAC FD-335HF 063-U

LED Panel

Keyboard

BIOS

BIOS entry key combination is CTRL-ALT-ESC pressed after the system booted.

Power Supply

The original BIOS battery is AA-size 3.6V Lithium battery. It can be easily replaced with popular 1/2AA size 3.6V LiSOCl2 batteries.

The power supply is pretty unusual and hard to replace. The pinout is described on the picture below. My laptop had the capacitors on the power supply board leaked. This caused the voltage to the LCD screen go out of the original range and turning the contrast wheel to the maximum contrast level provided voltage that actually killed the portions of the LCD panel – hence the dark vertical line on it.

If there is no need to charge the battery, it is possible to connect only +12V voltage and ground pins, for example from a router power supply that was described on the Atari SF314 FDD page. The power plug is Mini DIN 6-pin and is generally available today to purchase.

Battery

My computer came with no battery. For information about battery and its replacements, please see post about Commodore C286-LT. It is exactly the same in both models.

Reassembly

5 thoughts on “Commodore C386SX-LT

  1. Hey Pawel, I just got my hands on the same machine. Mine is faulty, power supply sounds like it took a lighting hit. Do you have any schematics for it?

    Like

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