RGB video cable for Sony Hit Bit MSX2 HB-F9P?

By OX

Resident (33)

Аватар пользователя OX

11-04-2016, 04:16

Hi, I need to get this machine up and running on a scart LED tv, it has a separate 8 pin DIN output for RGB video.
I am unable to locate the pinout for this port but wonder if it the same standard as this - https://www.retrogamingcables.co.uk/msx-turbo-rgb-av-scart-c...
Also, the cable shown does not mention if it has any resistors on the RGB lines as most modern LCD screens are very sensitive to the higher impedance of video signals on older equipment.
Does anyone on here know what the ideal cable would be for this system and would someone be able to supply me with one please?

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By RetroTechie

Paragon (1563)

Аватар пользователя RetroTechie

11-04-2016, 09:22

8 pin DIN -> SCART cable

From personal experience, a cable -properly- wired like that can be used for Sony HB-F700, HB-F9P, HB-F1, Sanyo Wavy PHC-70FD(2), Turbo-R and probably a few more MSX2/2+ machines.

Whether that cable you linked above qualifies as such? From the description I'd say it should... Reading that description better, it says pin 3 on the DIN not connected? That's not right, should be wired to SCART pin 8 (status RGB).
On most monitors that wouldn't make a difference. With a TV it could mean you have to manually select RGB input rather than having the TV switch to RGB as soon as you power on the MSX. Or that cable is wired as it should be, and description isn't accurate..?

OX wrote:

Also, the cable shown does not mention if it has any resistors on the RGB lines as most modern LCD screens are very sensitive to the higher impedance of video signals on older equipment.

??? Analog RGB video signals are standardised as 0.7V peak-peak when passed through a suitable cable, loaded with 75 Ohm impedance (on the monitor side!), and have been so for many decades. This goes both for SCART and VGA. MSX2 machines don't have any issues in this regard that I'm aware of. Image problems usually result from defects, bad cables/connectors, or monitors that are picky about signal timing (maybe your LCD screen is one of those?).

Ehm.. going a bit off-topic here. Basically: if you include series resistors in a cable like the above, then you are causing signals to go out of spec (so don't!).

I could supply a suitable cable, but shipping UK->UK will probably work out cheaper for you than shipping NL->UK. ;)

By OX

Resident (33)

Аватар пользователя OX

11-04-2016, 14:16

Thanks RetroTechie, The TV has a single scart connector input but there is no ability to select any RGB functionality directly, just the scart input. It is RGB enabled but I'm sure I have had problems before either due to the source not providing a switching voltage or not being wired, think this was on a ZX Spectrum +2 so I'm sure you are correct about pin 3 to scart pin 8.

By OX

Resident (33)

Аватар пользователя OX

12-04-2016, 02:21

RetroTechie wrote:

I could supply a suitable cable, but shipping UK->UK will probably work out cheaper for you than shipping NL->UK. Wink

How much would that cost RetroTechie?

By valkyre

Champion (441)

Аватар пользователя valkyre

12-04-2016, 08:24

It is reasonably easy to make your own lead up. What are you like with a soldering iron?

By RetroTechie

Paragon (1563)

Аватар пользователя RetroTechie

13-04-2016, 00:04

OX wrote:

How much would that cost RetroTechie?

Best I can do is € 10,- for the cable + shipping. Otherwise I might not be left with anything for the trouble... Wink Shipping costs can be found here: PostNL packages NL -> UK (I think I'd go for the cheapest option of € 9, that's without track & trace).
Total is kind of pricey imho. Sadly not many options to obtain custom cables like this. :(
If you decide to go for this: to exchange details please send a PM or mail me at: alwinh # dds dot nl.

valkyre wrote:

It is reasonably easy to make your own lead up. What are you like with a soldering iron?

+1. All you'd need is an 8p DIN plug, 21p male SCART connector, and suitable cable. You could snip off the ends of an old VGA cable for this.

By OX

Resident (33)

Аватар пользователя OX

14-04-2016, 00:25

Well looks straight forward enough from diagrams so I'm going to have a go at building one.

By Hans41

Expert (71)

Аватар пользователя Hans41

25-07-2016, 19:52

Hello all,

I apologize if this has been asked before, but I soldered an 8p rgb cable and it works. Improved image quality from my Sony hb-f9p on my ancient lcd tv.

But, there is some interference apparently, cause the screen moves/skips a litte vertically.

Any idea what the cause of that might be ? There are no short circuits, afaik.

Thank you !

By Hans41

Expert (71)

Аватар пользователя Hans41

25-07-2016, 20:02

...skips a littLe...

By valkyre

Champion (441)

Аватар пользователя valkyre

25-07-2016, 20:22

@ ox. If you are struggling there is a company here in the UK that will make your lead for you.