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My first TI console repair!


wolhess

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3 hours ago, dhe said:

Given my recent bad experience with ChinaRam, I believe a basic TL866 programmer is worth the money, just for it's ability to check ram!

It would seem the forging bad chips has become a really industry in China.

Is the TL866 able to test the 4116? I didn‘t see this in the manual or in the chip-list.

I have a TL866.

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22 minutes ago, wolhess said:

Maybe I will test to change the Elkos!

A good idea!

Advice: Turning the rotary potentiometer in the PHA2037 more to the left sets the color saturation higher.

Before you do anything, make photos to see how it looked before.

Edited by Sid1968
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  • 4 weeks later...
On 4/20/2020 at 10:32 PM, wolhess said:

For me the best picture currently is with a PHA 2036 and the Sony LCD TV. 
 

But I will try some other configurations in the Next days.

 

I have a PHA 2037 (RGB Modulator) too and I bought a line doubler OSSC from https://videogameperfection.com/products/open-source-scan-converter/

 

So I have some possibilities.

 

The best will be a FA18A mk2, when it is available.

I agree,

 

After lots of tests with different monitors and video converters the solution for me has been to use the PHA 2036. Here are the steps:

 

1) Luminance signal thorugh VGA converter on LCD monitor

MkXmGNq.jpg

 

2) Components cable on LCD monitor

BDWWWXb.jpg

 

3) Components to VGA converter on TRC monitor

fCmAUzq.jpg

 

4) Internal components to RGB converter

r0fci5A.jpg

Eliasce.jpg

 

5) PHA 2036 on LCD monitor

g7OVdXH.jpg

 

I'm really surprised of the quality image obtained with only the RF modulator, it seems composite video instead. Thank you @Flottmann1 ?

 

Next step will be to open the PHA2036 and try to get the video signal before the modulator and see what happens. I hope to have a little bit better quality. We will see...

 

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The best solution: composite video.

I thought it would just be soldering an RCA to the video signal before to enter into the modulator as happens with the ZX-Spectrum but the PHA 2036 that I have is the one with a plastic case, not a metallic one and it has been a little more entertaining. Basically I have installed an adapter circuit and now I already have composite video. Without obviously becoming RGB signal, the change from RF to composite is noticeable.

 

The adpater circuit

UIUKfWv.jpg
 

The "modulator" with audio/video outputs

xHaltG7.jpg
 

Video signal on TV

JB4zPbO.jpg
 

 

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  • 4 weeks later...

Hi, My beige TI console is broken, No Power and the 0.200A fuse in the transformer is also broken.

 

I replaced the transformer but immediately the second transformers fuse is broken.

 

I think the power supply board is defective.

 

So my question is, can I replace the power supply board of the beige console with a power supply board from a silver/black console?

 

Here are the pictures of the both power supplies:

 

The PS of the beige console:

 

IMG_3232.thumb.JPG.c7823217d8be769cea41106401a0b187.JPG

 

 

The PS of the black/silver console:

 

IMG_3233.thumb.JPG.7ac56e45828f71f9b21105e925c9471a.JPG

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On 5/17/2020 at 1:47 PM, Papalapa said:

The best solution: composite video.

I thought it would just be soldering an RCA to the video signal before to enter into the modulator as happens with the ZX-Spectrum but the PHA 2036 that I have is the one with a plastic case, not a metallic one and it has been a little more entertaining. Basically I have installed an adapter circuit and now I already have composite video. Without obviously becoming RGB signal, the change from RF to composite is noticeable.

 

The adpater circuit


...

The "modulator" with audio/video outputs


...

Video signal on TV


...

 



It seems like the you enjoyed my online tutorial? :) 
http://www.ti99iuc.it/web/index.php?pagina=mod_proj1&artid=121&_GUIDA: MODULATORE PAL MOD. PHA2030/2036 - MODIFICA RCA/SCART - (PLASTIC CASE)#.XuS6bUUzaUk

Edited by ti99iuc
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