http://www.minuszerodegrees.net/manuals/Toshi … ce%20Manual.pdf

Warlord wrote on 2021-11-11, 17:17:

http://www.minuszerodegrees.net/manuals/Toshi … ce%20Manual.pdf

I read that, but I have SXC version, and manual must be for T3200 or T3200SX, because I don't have these contrast control slides on the side 🙁

Niezgodka wrote on 2021-11-11, 15:33:

- Display. I connected the display, but either I did something wrong or it is broken, because it is very white and look like contrast need to be adjusted? Is there a contrast settings? How to change it?
I can barely see what is on the display, but is way to bright.

Probably the capacitors in the display are going bad. I had the exact same issue. After opening up the screen and checking capacitors, most of the electrolytic capacitors had leaked. They are on the PCB(s) all around the display. I had to desolder old caps, clean the PCB, and resolder new caps with similar rating and size.

Opening up the display is quite straightforward, but only up to the point where you might need to bend some metal and unsolder a few ground connections to access to the PCBs. Replacing these small electrolytic caps (the leaky ones were mostly black and round) requires good soldering skills. There are also two separate PCBs stacked on top for creating different voltages. These had also leaky cap problems and they were not stable until I cleaned them from the electrolyte. Later replaced the voltage regulators altogether with standard 2W isolated converters, for making 12V to -9V (I measured the previous one as -8V) and 12V to -12V (previous one with multiple windings) was not stable enough to measure, was just guessing. While repairing the display, I also had a random overcurrent problem and a current measurement resistor burnt with smoke. Then I added a resettable fuse in series with the resistor.

Luckily, it's always possible to connect an external VGA monitor.

The main power supply caps also leaked badly and then, for a while, the whole computer didn't work because of the capacitors. Replaced almost all low voltage caps in the power supply. High voltage caps were good, measured capacitance and ESR. Power supply and screen are working. The whole computer is working, although there are problems, like - after not being used for a week or more, it doesn't start the first time, sometimes only starts after I remove all add-in ISA cards.

I created a page about my T3200SXC: http://www.lepana.ee/tech/doku.php?id=toshiba_t3200sxc

I attach a picture that I took today to show how the capacitors look like in the display unit. Here they're black.
I've kept some of the black (I guess tantalum) caps, only replaced the leaky ones that had bad capacitance or bad ESR. Capacitance and ESR I measured with a LCR meter. Leaks are sometimes barely visible, you may notice a transparent goo around on the PCBs around the caps (not on the image).
The blue capacitors on the image are replacements that I soldered instead of the black capacitors. They're something I had, they're aluminium, so not perfect as a replacement. Ideally you would replace with tantalum with similar rating as printed, or maybe polymer caps, to avoid future leaks, but aluminium caps are good enough to see that it works now. Similar size would be a benefit also.
The picture just shows a small part of the back of the display, in this part the electrolytic capacitors were all black originally. Some (but not all) aluminium electrolytic caps on the back of the display also leaked.

Hi, i have recently find a T3200SXC .
I have change power caps, and test power supply, it work fine.
The computer start correctly , and boot on floppy disk.
The HDD note work.
The display is blank, and i change all caps.
I don t know why.
Do you know how to switch to external display ?
Thanks for your help.
Ghislain.

Ghislain wrote on 2024-08-25, 13:27:

The display is blank, and i change all caps.
I don t know why.
Do you know how to switch to external display ?

It's possible that the open/close lid switch of the display (right side of display) is not working properly or not connected. There are reports that it's sometimes not working as intended any more. Then it's possible that the small PCBs in the display are not doing the voltage conversion correctly any more (this happened to me). I replaced them with off-the-shelf DC-DC isolated power converters.

Otherwise I believe the output from external VGA connector should be active, even when the internal display is on. Try disconnecting the display cable behind the LCD unit, if rear VGA doesn't give you anything. I haven't tried this, but maybe it works.

If you want to have just any video output, find an ISA video card and use it in the top ISA slot, this will probably work.