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Hello guys, my SMS is having some sort of saturation problem and i don't know what component could be faulty.

I use an AV cable and this fault started after a few minutes playing, but now its there all the time.

Pictures atached.

WP_20170116_003[1].jpg (2.29 MB)

saturation1

WP_20170116_004[1].jpg (1.92 MB)

saturation2

nuclear7 wrote

Hello guys, my SMS is having some sort of saturation problem and i don't know what component could be faulty.

I use an AV cable and this fault started after a few minutes playing, but now its there all the time.

Pictures atached.

Try replacing electrolytic capacitor C46 on video line.

If your TV has S-Video input you can try improve picture quality adding a S-Video output.
And if you don´t use RF there is an issue caused by original circuit which cause some interference in picture which can be fixed removing just one resistor (R36).

http://esraelneto.com.br/hardware/sms_tt_s-video_v2a.php

Thank you neto, it fixed!
But since my CRT TV broke, the image is horrible in my LCD using the AV cable...

Is there anything i can get to have a fairer image quality without doing the S-video mod? I don't even own a S-video TV anymore.

nuclear7 wrote

Thank you neto, it fixed!
But since my CRT TV broke, the image is horrible in my LCD using the AV cable...

Is there anything i can get to have a fairer image quality without doing the S-video mod? I don't even own a S-video TV anymore.

The other mods require a RGB monitor
http://esraelneto.com.br/hardware/sms_tt_rgb.php
Or
If you want to improve composite video quality changing video encoder from MC1377P to CXA1645P
http://esraelneto.com.br/hardware/sms_tt_cxa1645.php

Well my SMS is not fixed..
After about 10 minutes playing the screen starts to blink/flash to and from the weird colors of the pictures.
What else could it be?

nuclear7 wrote

Well my SMS is not fixed..
After about 10 minutes playing the screen starts to blink/flash to and from the weird colors of the pictures.
What else could it be?

Check the variable resistor VR101 (100K) and ceramic capacitor C31 (100nF) near the video encoder MC1377P.

Author	Message
nuclear7 Joined: 05 Feb 2017 Posts: 3	SMS Tec-Toy (Brazil) Video Problem (help) Posted: Sun Feb 05, 2017 2:53 am
nuclear7 Joined: 05 Feb 2017 Posts: 3	Hello guys, my SMS is having some sort of saturation problem and i don't know what component could be faulty. I use an AV cable and this fault started after a few minutes playing, but now its there all the time. Pictures atached. WP_20170116_003[1].jpg (2.29 MB) saturation1 WP_20170116_004[1].jpg (1.92 MB) saturation2

Neto Joined: 04 Dec 2016 Posts: 44 Location: Guarulhos - SP - Brasil	Posted: Sun Feb 05, 2017 2:57 pm
	nuclear7 wrote Hello guys, my SMS is having some sort of saturation problem and i don't know what component could be faulty. I use an AV cable and this fault started after a few minutes playing, but now its there all the time. Pictures atached. Try replacing electrolytic capacitor C46 on video line. If your TV has S-Video input you can try improve picture quality adding a S-Video output. And if you don´t use RF there is an issue caused by original circuit which cause some interference in picture which can be fixed removing just one resistor (R36). http://esraelneto.com.br/hardware/sms_tt_s-video_v2a.php

nuclear7 Joined: 05 Feb 2017 Posts: 3	Posted: Mon Feb 06, 2017 11:46 pm
nuclear7 Joined: 05 Feb 2017 Posts: 3	Thank you neto, it fixed! But since my CRT TV broke, the image is horrible in my LCD using the AV cable... Is there anything i can get to have a fairer image quality without doing the S-video mod? I don't even own a S-video TV anymore.

Neto Joined: 04 Dec 2016 Posts: 44 Location: Guarulhos - SP - Brasil	Posted: Tue Feb 07, 2017 2:47 am
	nuclear7 wrote Thank you neto, it fixed! But since my CRT TV broke, the image is horrible in my LCD using the AV cable... Is there anything i can get to have a fairer image quality without doing the S-video mod? I don't even own a S-video TV anymore. The other mods require a RGB monitor http://esraelneto.com.br/hardware/sms_tt_rgb.php Or If you want to improve composite video quality changing video encoder from MC1377P to CXA1645P http://esraelneto.com.br/hardware/sms_tt_cxa1645.php

nuclear7 Joined: 05 Feb 2017 Posts: 3	Posted: Fri Feb 10, 2017 1:16 am
nuclear7 Joined: 05 Feb 2017 Posts: 3	Well my SMS is not fixed.. After about 10 minutes playing the screen starts to blink/flash to and from the weird colors of the pictures. What else could it be?

Neto Joined: 04 Dec 2016 Posts: 44 Location: Guarulhos - SP - Brasil	Posted: Sat Feb 11, 2017 12:48 am
	nuclear7 wrote Well my SMS is not fixed.. After about 10 minutes playing the screen starts to blink/flash to and from the weird colors of the pictures. What else could it be? Check the variable resistor VR101 (100K) and ceramic capacitor C31 (100nF) near the video encoder MC1377P.

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