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PAL SNES 1CHIP-01/02 csync restore

bond.san

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bond.san
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06/25/14
Edit: am populating one of borti's SNES RGB Bypass Board Vers. 4.1a ( with_csync )

I will be using a PAL SCART cable, to use the existing 12V on SCART pin 8; automatically setting the TV to 4:3 aspect ratio.

borti's pcb ( for use with NTSC cable )
AV Port pin 3 = c-sync
AV Port pin 9 = not connected ( composite video )

My PAL SCART cable ( with 75ohm
AV Port pin 3 = 12V
AV Port pin 9 = c-sync
1583967697089.png

- cut trace from R43
- wire jumper cable from R43 to AV pin 9
1583967636526.png

---------------------------------------------------------------------------------------------
To use a pure h+v sync signal as opposed to the existing composite or luma signals.
Is a line driver circuit required for the current draw from a 'typical modern LCD'?

BA6592F
Icc 38 mA Vr=Vg=Vb = 0.7Vp-p
Is this the maximum current rating? does this apply to the sync output?

SONY LCD KDL-40
sony kdl input.png
1/75 = 0.0133 = 13.3 mA
Is this the correct equation for the TV's maximum input current draw?

Would anyone like to check my circuit please :)
csync restore.png

Yes I might order borti's SNES RGB Bypass Board Vers. 4.1a

mostly this is self education in 'tronics :)
 
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