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 Post subject: Re: Sony BA-5D/BA-5 Chassis TV RGB Mod with OSD Mix
PostPosted: Wed Nov 06, 2019 3:23 am 


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Joined: 05 Mar 2018
Posts: 958
billybob884 wrote:
maxtherabbit wrote:
I don't care for the SCART connector, but I must say that's well done


Thanks! Any particular reason against the SCART? Or a suggestion as to an alternative? I'm primarily a Genesis/MD collector/player, and the Genesis/SCART cable seemed to be the most common choice for RGB setups

I prefer the VGA connector or BNCs for RGBS. Don't like plumbing in audio in the same plug. Also don't care for the physical characteristics of the scart connector


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 Post subject: Re: Sony BA-5D/BA-5 Chassis TV RGB Mod with OSD Mix
PostPosted: Wed Nov 06, 2019 4:24 am 



Joined: 11 Oct 2019
Posts: 8
Ah, well actually I left the SCART audio unconnected inside the TV for two reasons, one is because I'm using the SegaCD base, and some people insist you get better audio directly from it rather than the pass-through to the Genesis' AV-out (though I'm not sure how true that is), and two, looking at the TV's schematic diagram, it looks like the RCA audio connectors are switch-jacks, so the audio channels get mixed to mono when there isn't a physical plug connected to force it to stereo. It should be fixable by cutting the trace between the channels, but eh, why bother if the first point is true.

As for VGA or BNCs, a cursory search didn't turn up any ready-made Genesis-out cables... but either way, the work's done and I'm not planning to re-do all now (though if you did have a product on-hand I wouldn't mind taking a look out of curiosity)


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 Post subject: Re: Sony BA-5D/BA-5 Chassis TV RGB Mod with OSD Mix
PostPosted: Wed Nov 06, 2019 3:10 pm 


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billybob884 wrote:
Ah, well actually I left the SCART audio unconnected inside the TV for two reasons, one is because I'm using the SegaCD base, and some people insist you get better audio directly from it rather than the pass-through to the Genesis' AV-out (though I'm not sure how true that is), and two, looking at the TV's schematic diagram, it looks like the RCA audio connectors are switch-jacks, so the audio channels get mixed to mono when there isn't a physical plug connected to force it to stereo. It should be fixable by cutting the trace between the channels, but eh, why bother if the first point is true.

As for VGA or BNCs, a cursory search didn't turn up any ready-made Genesis-out cables... but either way, the work's done and I'm not planning to re-do all now (though if you did have a product on-hand I wouldn't mind taking a look out of curiosity)

I have a prototype VGA dongle for genesis I'm working on, like a miniaturized version of the Dreamcast VGA box

Image


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 Post subject: Re: Sony BA-5D/BA-5 Chassis TV RGB Mod with OSD Mix
PostPosted: Thu Nov 07, 2019 4:07 am 



Joined: 21 Oct 2019
Posts: 6
Nice Work!

Is there a recap list of caps for geometry out there for this set?


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 Post subject: Re: Sony BA-5D/BA-5 Chassis TV RGB Mod with OSD Mix
PostPosted: Fri Nov 08, 2019 1:19 pm 



Joined: 11 Oct 2019
Posts: 8
The service manual has a list of all capacitors (and all components for that matter, I believe it was ~120 electrolytic caps for the KV-32FS100 ), but I don't know which specifically will aide with geometry, sorry

That does merit asking though; to anyone who has re-capped their TV, how much did it help/affect your picture geometry? The service menu settings have helped worlds for mine, but I've still got a little warping the settings won't fix (in addition to convergence issues at the corners), so I too am considering that as the next step


Last edited by billybob884 on Sun Nov 10, 2019 7:51 pm, edited 1 time in total.

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 Post subject: Re: Sony BA-5D/BA-5 Chassis TV RGB Mod with OSD Mix
PostPosted: Sat Nov 09, 2019 11:51 am 



Joined: 18 May 2017
Posts: 621
There’s actually a pretty simple way to work out which caps to change for geometry.

Look for the horizontal and vertical ICs. They will have numbers like IC501 and IC601 (it will vary from set to set). Then look for electrolytic capacitors that start with the same number, e.g. C512, c604. They will be the ones to target.
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MarkOZLAD
OSD/External RGB Mux Diagram
OSD/External RGB Mux Resistor Value Table 0.7Vp-p : 0.5Vp-p

"Imagine toggle switch OSD modding a TV in 2019" - maxtherabbit


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 Post subject: Re: Sony BA-5D/BA-5 Chassis TV RGB Mod with OSD Mix
PostPosted: Sat Nov 09, 2019 11:44 pm 



Joined: 18 May 2017
Posts: 621
Oh, and extract the list from a service manual. If the service manual is a scanned one you might have to use some free online OCR tools to get the data into a useable format.
_________________
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MarkOZLAD
OSD/External RGB Mux Diagram
OSD/External RGB Mux Resistor Value Table 0.7Vp-p : 0.5Vp-p

"Imagine toggle switch OSD modding a TV in 2019" - maxtherabbit


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 Post subject: Re: Sony BA-5D/BA-5 Chassis TV RGB Mod with OSD Mix
PostPosted: Sun Nov 10, 2019 5:21 am 



Joined: 11 Oct 2019
Posts: 8
So hunting though the diagrams, I found IC561, which I think is the vertical IC? It's labelled "V OUT" on the wiring diagram, and the part description is IC STV9379. Looking up a spec sheet, it's called a "Vertical Deflection Booster".

As for the horizontal IC... I've not had any luck there, so I put together a list of all ICs from the manual to try to search for it:

Spoiler: show
Code:
--Board A--
REF. NO.   PART NO.   DESCRIPTION
IC001   6-801-165-01   IC M306V5ME-109SP
IC002   6-701-929-01   IC BD4743G-TR
IC003   8-759-641-86   IC BR24C16F-E2
IC301   8-752-100-49   IC CXA2154AS
IC302   6-701-597-01   IC TC90A69N
IC400   6-701-753-01   IC NJW1135GK1-TE2
IC501   8-759-700-07   IC NJM2903M-TE2
IC561   8-759-696-71   IC STV9379
IC6008   6-701-752-01   IC NJM2930F05

--Board C--
IC701   8-759-803-42   IC LA6500-FA
IC702   8-759-562-43   IC TDA6108JF/N1B
IC703   8-759-701-59   IC NJM78M09FA

--Board P--
IC3301   6-701-754-01   IC M65665ASP
IC3390   8-759-701-59   IC NJM78M09FA

--Board HS--
IC1001   8-742-212-20   HYB IC SBX3081-71

--Board GK--
IC600   8-759-670-30   IC MCZ3001D
IC601   8-749-012-13   IC DM-58
IC605   8-759-450-47   IC BA05T
IC609   8-759-653-07   IC PQ09RD21
IC1405   8-759-573-40   IC TDA8580Q/N1

--Board V--
IC801   6-701-598-01   IC UPC5023CS-184

Spoiler'd to keep the page tidy


Edit:
So while the (suspected) vertical IC is actually labelled "IC", I found a transistor (Q502) on the diagram labelled "H OUT", TRANSISTOR 2SD2645-YB. A google search turns up a datasheet says it has "color TV horizontal deflection output applications", so... I guess that's the horizontal IC? The thing is, all of the capacitors attached to it are surface/film types...


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 Post subject: Re: Sony BA-5D/BA-5 Chassis TV RGB Mod with OSD Mix
PostPosted: Sun Nov 10, 2019 9:22 am 



Joined: 18 May 2017
Posts: 621
Just had a squiz at the service manual, I’d be looking at the electrolytic caps that start with C5. I normally prioritise the higher voltage ones.
_________________
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MarkOZLAD
OSD/External RGB Mux Diagram
OSD/External RGB Mux Resistor Value Table 0.7Vp-p : 0.5Vp-p

"Imagine toggle switch OSD modding a TV in 2019" - maxtherabbit


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 Post subject: Re: Sony BA-5D/BA-5 Chassis TV RGB Mod with OSD Mix
PostPosted: Sun Nov 10, 2019 9:55 pm 



Joined: 11 Oct 2019
Posts: 8
Gotcha. Well for the benefit of classicgamer007 (and myself... and anyone else with this specific TV), for the KV-32FS100, looking at only the "C5**" electrolytic capacitors makes a total of 21:
Spoiler: show

And abbreviated into a BOM list:
Spoiler: show


=============================================================================================

If you also wanted to add in all "high voltage" caps (I'm defining this as rated 100V+), the list would look like this:
Spoiler: show

And the BOM:
Spoiler: show


=============================================================================================

And if you really wanted to go whole-hog, this specific model has a total of 119 electrolytic capacitors across all 6 boards:
Spoiler: show

The BOM:
Spoiler: show

Note that neither of the two caps on board GK ("C650" & "C1450") had voltages/tolerances in the service manual table, and I don't have my set open/apart right now to check them. Both caps are connected to a line labelled "AUDIO VCC", and the VCC/VCCL pins of IC1405 (which I couldn't find a datasheet for), so I think they're filter caps for this IC...? Don't think they'd be high voltage, but I could be wrong.


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 Post subject: Re: Sony BA-5D/BA-5 Chassis TV RGB Mod with OSD Mix
PostPosted: Thu Nov 14, 2019 4:59 pm 



Joined: 25 Oct 2019
Posts: 6
Location: Ohio, USA
MarkOZLAD wrote:
SolidSpiral wrote:
Do you make your own SCART cables for your game systems as well? .


I don't like wiring scart, so no.

SolidSpiral wrote:
I saw this diagram for the SNES. (is that yellow square a 180 Ohm resistor?


Yes. It acts as a part of a voltage divider with a 75 ohm resistor that is in the TV set to drop 5V down to 1.5V for RGB Fast Switching/blanking (on factory scart sets anyway)

SolidSpiral wrote:
Is the composite video line the Csync?)


Yes. Scart standard is Composite Video as Sync. We inject csync or luma because its either what we have or because we might get cleaner images.

SolidSpiral wrote:
Or is it better to just buy them?


Completely up to you. I buy them.

SolidSpiral wrote:
I also saw a 330 Ohm resistor for the Csync line mentioned on a high end cable for sale, but that's not in the diagram above. Is that optional?


This would depend on the console. That seems like it would be attenuating 5Vp-p sync to 1Vp-p suitable for a TV. 5Vp-p is also know as TTL sync - Transistor to Transistor Logic levels are 5Vp-p. TV's want less than 1Vp-p (usually 0.3Vp-p) sync so needs resistors. Once again the resistor works with a 75 Ohm resistor in the TV to make a voltage divider.


Had another question related to this line of questioning. I found this website selling SCART cables, and they have cables that use the CSYNC signal from the MultiAV out pin 3. It sounds like this is a better(cleaner) option, but had a question. When using this cable, can I still patch into the yellow composite input on the back of the TV for sync, or do I now need to use a input that patches into the S-Video input?

Sorry still new to this and trying to learn. Is retrogamingcables a good site to buy these from?

I picked up a Toshiba 32" CF32F50 a few weeks ago, that I want to try the RGB mod out on. Had no luck finding the service manual, but found the old SAMS Photofact at the library. May see me post again on here within the next few weeks as I try to figure out how to try this out. Thanks again! :)


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 Post subject: Re: Sony BA-5D/BA-5 Chassis TV RGB Mod with OSD Mix
PostPosted: Thu Nov 14, 2019 10:49 pm 



Joined: 18 May 2017
Posts: 621
SolidSpiral wrote:
Had another question related to this line of questioning. I found this website selling SCART cables, and they have cables that use the CSYNC signal from the MultiAV out pin 3. It sounds like this is a better(cleaner) option, but had a question. When using this cable, can I still patch into the yellow composite input on the back of the TV for sync, or do I now need to use a input that patches into the S-Video input?


Composite as sync, Luma as sync or CSync can go through Composite AV port or S-Video. S-Video port only used to prevent the screen "left shift" that occurs.
_________________
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MarkOZLAD
OSD/External RGB Mux Diagram
OSD/External RGB Mux Resistor Value Table 0.7Vp-p : 0.5Vp-p

"Imagine toggle switch OSD modding a TV in 2019" - maxtherabbit


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 Post subject: Re: Sony BA-5D/BA-5 Chassis TV RGB Mod with OSD Mix
PostPosted: Thu Nov 14, 2019 10:59 pm 



Joined: 25 Oct 2019
Posts: 6
Location: Ohio, USA
Quote:
Composite as sync, Luma as sync or CSync can go through Composite AV port or S-Video. S-Video port only used to prevent the screen "left shift" that occurs.


Great! Thanks! Does the left shift always happen, or does it depend on the set?


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 Post subject: Re: Sony BA-5D/BA-5 Chassis TV RGB Mod with OSD Mix
PostPosted: Fri Nov 15, 2019 2:36 am 



Joined: 18 May 2017
Posts: 621
SolidSpiral wrote:
Quote:
Composite as sync, Luma as sync or CSync can go through Composite AV port or S-Video. S-Video port only used to prevent the screen "left shift" that occurs.


Great! Thanks! Does the left shift always happen, or does it depend on the set?


Mostly happens but yes, depends on the set.
_________________
___________________________________________________
MarkOZLAD
OSD/External RGB Mux Diagram
OSD/External RGB Mux Resistor Value Table 0.7Vp-p : 0.5Vp-p

"Imagine toggle switch OSD modding a TV in 2019" - maxtherabbit


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