Hey MSXers! Looking for some guidance. Started making my own RGB cables recently to hook up to my PVM. Looked forum post on here for pinout using this:
Mitsubishi (Japan), National/Panasonic (except the FS-A1WSX), Sakhr, Sony and Yamaha computers + Sanyo MSX2/2+ computers
These computers use DIN 45326 type A. This is the official RGB pinout for the MSX, described in the MSX-Datapack and shown in the following table. It was used on Mitsubishi (Japan), National/Panasonic (except the FS-A1WSX), Sakhr, Sony and Yamaha computers and Sanyo MSX2/2+ computers
Pin Name Description SCART Connection
1 GND Ground To all SCART ground pins
2 AUDIO Audio To SCART pin 6
3 AV AV Control (+4.5V to +5V) To SCART pin 8
4 SYNC CSync 0.3Vpp / (CVBS on some machines) To SCART pin 20
5 YS Fast switch (+3V or +5V) To SCART pin 16
6 R Red signal To SCART pin 15
7 G Green signal To SCART pin 11
8 B Blue signal To SCART pin 7
Note: The Ys pin is used to superimpose the MSX image on the receiver. But on most MSX models this pin has just a fixed voltage. It's a data pin, so do not use it as Vcc.
Have it all hooked up and was not getting any blue signal. Red and Green are coming out but no blue. I scoped pin 8 and sure enough I am not getting anything. Red and Greed have activity and a 15khz signal. I took the computer down but have not removed the motherboard from the bottom shell yet. Any suggestions or do you know where I should look? I serviced the HIC board when I first got the machine it was in immaculate condition. Composite signal works just fine. Doesn't the HIC board handle video for the system? Should I look there first and see if I screwed it up doing the recap?
Thanks for any suggestions and help you can offer!
Now I need to remake my original rgb cable since I suspected that was the fault initially haha.