This is at the very bottom of my priority list, but I have an arcade unit that's been awol for the past six months. I was looking to pay someone to take a look, but if someone on this board can point me in the right direction I might be able to fix it myself.
The video is all screwy, blotches of color, flashing every couple of seconds. I don't know if it's the monitor or the video feeding it.
Post by Casethecorvetteman on Feb 21, 2014 23:48:57 GMT -5
Nah its the board not the monitor. Show me a pic of what its doing. It sounds like its doing the startup test sequence over and over, if its a mostly green screen.
Do you have a UniBIOS in there?
First thing, try it with no game cart, if it comes up to crosshatch, clean the cart and cart slot terminals, try it again, if still no go test the voltage on the JAMMA edge, just the 5v connection, 12v is not important and only feeds the audio amplifier. The game will run without 12v present. With a game in and running, you should aim for about 5.1-5.15v at the JAMMA edge, if it drops too low below 5v itll reset due to lack of voltage to the P-ROMs.
Yes, mostly green. It goes black every 2-3 seconds, mostly green.
I think I remember getting the crosshatch pattern when I took out the cartridge (six months ago). I tried a few different carts, none worked, used some compressed air on the slot terminals. What would you recommend to use to clean them with?
Post by Casethecorvetteman on Feb 23, 2014 6:44:05 GMT -5
That is the bootup test screen. The game is not starting.
What does it do with no cart?
Use isopropyl alcohol to clean the cart contacts. Its quite normal on NEO-GEO to have this issue, ive got 2 home consoles and a few MVS boards, about 120 carts, sometimes even new old stock sealed ones need a clean before they will work.
What voltage is on the 5v when it does this?
I think the battery on that board you have is the later version that wasnt an issue for leaking, id have to see a pic of the board cause i cant remember what the 1F looks like. Post a pic of the board with no cart, specifically look around the battery for corrosion.
Calendar error is either a bad Clock/Calendar chip (VERY unlikely), a bad 32.768khz crystal (likely) or no +5v on the chip when powered up (VERY likely). The "no +5v" is caused by corrosion on the board from a leaky battery. Crystal can just be a dead crystal or one killed by a leaking battery. I've also see that message come from gouged traces on the bottom of the board. Calendar Error is also known as "Stuck on Green Screen" when starting. Both signify a calendar problem.
In my case it was a dead battery. I desoldered the old rechargeable battery, desoldered a resistor for the recharging circuit and installed a coin battery holder and battery. Fortunately it wasn't the crystal or the calendar chip. Total time of repair: about 15 minutes.
zjjxhzf: hello Gabor i am DLP projectorColor wheel is not accurate，setup memory， the phase angle cant setting for the color wheel ，must use service code.
Sept 19, 2017 1:31:25 GMT -5
mastertech: Hi stranger. Guess you spent your summer cruising on that street bike.
Sept 17, 2017 21:43:54 GMT -5
nashou: Hey everyone, just saying hi ! Hvent been here for a while hope you're all doing well !!
Sept 17, 2017 19:19:25 GMT -5
mastertech: Parts for repair are no longer available.
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mayavi: my pioneer elite VSX-92TXH it freezes until I unplug and then it won't power on until maybe 10 minutes. came to know that its a common problem in this model. any help would be much appreciated......
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jaredjaric: Thanks so much Hulio :), your expertise is very much respected
Aug 20, 2017 9:25:37 GMT -5
Admin: james: you need to post in the thread where your problem is being discussed.
Aug 9, 2017 19:51:54 GMT -5
james: Yes Sir All wiring was connected.
Aug 9, 2017 7:46:15 GMT -5
Admin: I have uploaded a copy of the SM to the digital projector section.
Jan 10, 2017 20:21:56 GMT -5
ducki: sorrry for my bad english ....(google translate
Jan 10, 2017 17:44:21 GMT -5
ducki: I have the same defect as a cp-x4021n you but can not start it ... I did the same trials with ic202 pc102 and still do not like, I make short pin 1 and 2 of the pc102 and PJ light (orange) goes off ... you can help me with a service manual for this PJ? TNX
Jan 10, 2017 17:43:46 GMT -5
jlb12: pwr switch off = 2(0.0) 3(11.7) 6(.04) 7(.04)
Dec 13, 2016 23:27:03 GMT -5
jlb12: No Problem. Thank you for all your help.
Dec 13, 2016 0:20:40 GMT -5