Monitor up and running but small issues

Joined
Dec 9, 2006
Posts
15
Well success at last , I eventually got that 27 inch Sony monitor working due to the fact the wiring diagram I got off the net was totally wrong with the pin out locations . After removing the rear monitors input circuit board and checking the pins configuration on the board ( thank god they were labled )I knew I've been had by false info . I hooked the the Jamma board to the Sony's rear RGB multi pin input ( looks exactly like a 34 pin floppy drive connector). Now picture comes up but a small issues I now have to deal with .
The image isn't 100% , I don't know if it's the fault of the 48 in 1 games board or my monitor . All images produced on screen has small lines going through them ( game playable but reminds me of the old Atrai graphics) As I don't have another Jamma board I can't really test to see if it's the fault of the multi games board .
Oh well not a major problem but more of a teething one at that.
Here is the wiring diagram of how I connected up the RGB Multi Pin plug.
1 bridged with 33
2 bridged with 29
GND pins bridged 4, 8, 9, 10, 11, 12, 13, 16,
25 to Jamma RED
26 to Jamma Green
27 to Jamma Blue
30 to Jamma Sync.

Here is the full wiring diagram for the multi pin plug.

Pin Description
1 +5V power supply
2 +5V power supply
3 Audio (R) input GND
4 GND
5 Remote control GND
6 Composite video output GND
7 Audio (L) input GND
8 Red Return (GND)
9 Green Return (GND)
10 Blue Return (GND)
11 GND
12 Blanking input Return (GND)
13 H.sync Return (GND)
14 N.C.
15 V.sync Return (GND)
16 GND
17 N.C.
18 N.C.
19 N.C.
20 Audio (R) Input
21 Mode Select
22 N.C.
23 Composite Video Output
24 Audio (L) Input
25 Red Input
26 Green Input
27 Blue input
28 N.C.
29 Blanking Input
30 H.sync or composite sync
31 V.sync
32 N.C.
33 RGB/NORMAL mode select
34 Audio Select
 
Last edited:
Joined
Dec 9, 2006
Posts
15
Well I've come to the conclusion that the problem is in the output of the Jamma CGA . I am currently building a circuit to Convert VGA from the 48 in 1 Jamma board to RGB monitor and have ordered the components today , so when I complete the board I will post my findings on how it went. Regards Electroman2006
 

werejag

Galford's Poppy Trainer
Joined
May 3, 2005
Posts
2,626
i did ask you if you was sure.

also why so many of the same thread
 
Joined
Dec 9, 2006
Posts
15
werejag said:
i did ask you if you was sure.

also why so many of the same thread
Hi , You did ask in my other thread if it supports Jamma Video which I said yes . Now with the fault with the graphics it doesn't mean it won't support it , it means there is a teething problem but I'm not bothered to pursue it any longer . I'm now following the VGA side and building a VGA to RGB + composite sync converter to see if this works and if it doesn't I'll go back and try to fix the original fault. I'm the type of person who like to try different avenues because if you don't try how are you ever going to learn about it . The reason I posted it in another thread is that I would like to get opinions from other techs to see what they think and to start a new thread with my question upfront ( but I also had to explaining what was done so they would know ) would be better than to leave it at the bottom of another large thread that you have to read for it's entirety to get to the same question. ( Gee I hope that made sense as it's 3am and I'm tired and ready for bed . ) Regards Electroman2006
 
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