Arcade Collecting > Miscellaneous Arcade Talk
How to start finding board and monitor problems?
D_Zoot:
Wiring color I got right out of the schem link you posted.
Wire color "lingo" generally runs along the lines of "R" = red, "O" or "Org" = orange... and so forth and so on....
It's possible I mistook some abbreviations on the schem, it is a pdf scan... I'll look at it again...
D
unclet:
I will look again when I get back from vacation but I was unable to find any letters "R" or "O" , etc... If I saw any letters then I would have figured they meant colors. Perhaps I looked at the wrong PDF page number......
Anyway, gotta finish packing .... leaving for vacation in 9 hours..... I will be looking forward to your reply when I return ......thanks for the effort...
unclet:
Ok, back from vacation ........ I am ready to play around with this machine again so if you have any other recommendations on how to continue please let them be known .....thanks
unclet:
D_Zoot:
Ok, I had time to relook at the power supply and found the page with the letters which represent colors. I mapped all of the colors of the wires which I have and compared them to the documented page information. I found a few differences (noted below in BOLD). Anyway, when I retested the wires based on the colors I have, I received all V-Ac and V-Dc readings like you mentioned.
The V-Ac readings I received are as follows:
White/Green wire and Yellow/Black wire = 13.9V (which is ~12.0V)
Yellow wire and Black wire = 19.0V (which is ~16.5V)
Yellow wire and Orange/Black = 10.3V (which is ~9.0V)
Yellow wire and Red/White wire = 10.3V (which is ~9.0V)
Yellow wire and Grey wire = 19.0V (which is ~16.5V)
The V-Dc readings I received are as folllows:
Orange/Red wire and White wire = 5.0V (exact)
Orange/Red wire and White/Brown wire = 13.0V (which is ~12V)
Orange/Red wire and Black/Green wire = -5.0V (exact)
Do these readings mean my power supply is fine? Any ideas what to test next and how?
unclet:
Ok, I found/replaced a missing 1.5Amp fuse for the monitor and now the monitor tube light up. The image displayed is just solid white though.
I friend sent me some pictures of his Space Encounters cabinet and I was able to see that the coin door present in the cabinet did have a slam switch attached to the back of it. I do not have coin mechs or a slam switch on my cabinet .... all I have is the metal door front attached to the cabinet with no actual coin door parts behind it. There is also a molex connector which is just hanging around from the wiring harness which is suppose to be used to connect to a fully functioning/populated coin door.
Anyway, do you think since my cabinet is wired for a slam switch and knowing I do not have the actual slam switch present on my cabinet, then I might need to connect the two wires together which were intended for use as a slam switch? Is this a cause of my troubles? Also, paigeoliver mentioned that maybe since the coin mech switches are not present then this might result in the game not booting ......
Basically, should I tried simply connecting all the coin mech switch wires to each other simulating that a coin mech is there? Also, do I do the same with the slam-switch wires?
IMPORTANT FINDING?: I just verified my power supply board still was producing the 5V, 12V and -5V as stated in my previous posting .... and it does as long as the "Main PCB Plug" (see labelled photo) IS NOT plugged into the Main PCB.
When the "Main PCB Plug" IS plugged into the Main PCB, I get the following readings:
Orange/Red wire and White wire = 5.0V-Dc
Orange/Red wire and White/Brown wire = -56V-Dc
Orange/Red wire and Black/Green wire = -110V-Dc
Is this change in the V-Dc readings explainable when the plug is plugged into the board?
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