MP-3 TV tuner

[Bryce]

I really don't know why amstrad made diferent tv turners boards. He can be manufacture easily a pal/secam compatible mp-3.

It was a UK computer that was aimed at Europe with notions of conquering the US and came with its own monitor anyway. PAL was used by 95% of Europe and the US was 100% NTSC, why would they spend even a cent on expanding the design to include something as obscure as secam?

Bryce.

[Token]

I have no idea of how modify my nes clon to RGB




Anyway talking about strange and impossible  options.


The pal versión is based in the an5620x chip + an5612


The secam uses a an5630x +an5612. The An5630x have switch to support pal/secam automatically. But i think he need the  an5622 to decode de pal colour between an5612 and an5630x


I really don't know why amstrad made diferent tv turners boards. He can be manufacture easily a pal/secam compatible mp-3.

I've seen that the pins are different 16 vs 24, but would it be possible to swap the an5630x with a an5620x in the french MP-3? All pins are needed?..

What I want is to use the C64.
Strangely the boot works very well, all in color on the CTM644 & french MP-3, but it turn b&w when running games. So I'm using the PAL MP-3 with RF, it's not too bad with small cable. It's a bit annoying to tune sometime..
I used a 9V battery for b&w composite, but maybe the C64 have it, or it is possible to find it somewhere on the MP-3 PCB to make an AV mod with a little AV/RF switch?

[dragon]

In priceminister at times is  possible buy a sony pal/secam adapter only for video. Is a crappy solutiom anyway.

http://www.priceminister.com/offer/buy/2438987/Sony-VMC-2102F-Transcodeur-Pal-Secam-SFR-1000K-cordons-Camescope.html


I think amstrad use the reference desing for the ics. I not sure if is easy as swap chips, The expert in hardware was bryce, maybe he know if can be transformed in pal,make a switch of something obscure alternative modification.

[Bryce]

In priceminister at times is  possible buy a sony pal/secam adapter only for video. Is a crappy solutiom anyway.

http://www.priceminister.com/offer/buy/2438987/Sony-VMC-2102F-Transcodeur-Pal-Secam-SFR-1000K-cordons-Camescope.html


I think amstrad use the reference desing for the ics. I not sure if is easy as swap chips, The expert in hardware was bryce, maybe he know if can be transformed in pal,make a switch of something obscure alternative modification.

Point me to the schematics and I'll tell you what's possible.

Bryce.

[dragon]

Point me to the schematics and I'll tell you what's possible.

Bryce.

Not exist schematic for french version, only the pal in the admnent service manual.

The observations i made i these day, was comparing pal schematics with ic reference desing from manufacturer and little look in live  french mp-3.

http://www.cpcwiki.eu/manuals/Amendment%20Service%20Manual.zip

But hey, if you want take the hardware project of made a mp-3 french accept pal/secam signals in the scart and rgb. I can send my french mp-3 to you. So you can work with the hardware and document it.

Only please tries to return me it alive after modify it,i only have one .

[Bryce]

Remind me about this again when my workload is less (around December).

Bryce.

[dragon]

Resurrecting...


I have these in standby because  monitor die.


I was lucky and find one sfr-1000 for 5e. It not appears activate av mode in the french mp-3. I have try the converter in a lcd and appear work. So I now wait for the 9v kit to patch scart scart wire.


I'n the mean time I have read such a interesting thing about the french mp-3. The scart socket appears bidirectional. It can recieve, and he can emit secam? composite from the rf signal.


https://forum.system-cfg.com/viewtopic.php?f=18&t=10216

[dragon]

Finally I have tested the french mp-3+ the sony sfr-1000 (pal secam trascodeur). Only need make a modification  to scart cable to add 150mh resistance+9v battery in pin 8 to force select av in the mp-3.I have tested with the gx4000(the gx4000 activate av signal in the mp-3)..and one  nes clone with only rca. It work very well. There is no lag appreciably when play and the image was very good.
https://www.amazon.es/photos/share/PmI3yeZIvn4RGju0H18bMF8gbWkJdJaX8UhtkLgEdgA

Picture was from nevir mastergames nvr-vi(pal nes clone) connected with rca though the Sony. And the Sony connected to the mp-3 with scart cable with the 9v battery.

The Sony only trascode if he  detects  the pal signal, it ignored any other format. If signal is  pal he trascode it to secam, if not it resend the signal thought scart out connector as it recieve it. Ntsc for example.

I'n the other hand he don't touch the sound. It output it thought the exit scart as he recieve it even if the power supply is not connected to the Sony. So is posible connect the rgb directly to the ctm and only sound to the sony.


It not appear resend the rgb thought scart out. I have tested with the snes rgb in the led tv(he read the secam signal  from the  Sony) and it output black & white image.(same as the mp-3)but the mp-3 don't have rgb enable in the mp-3 phisycally. And the led have it.

Another thing, after much search I have found a manufacturer that today made these trascorders.



https://www.globalmediapro.com/dp/A01J30/Globalmediapro-F-209PS-PAL-to-SECAM-Converter/


Its safe the rgb modification of the three wires  at electronic level?. I mean there is not conflict between the rgb signal though scart  and the rgb signal generated by the mp-3 from composite?.