Fabtek Raiden board not outputting correctly

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beatsgo
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Fabtek Raiden board not outputting correctly

Post by beatsgo »

As you may recall from the Official Cool PCB You just got, I recently purchased a workable Fabtek Raiden board. That's my second Raiden board. My first Raiden board I bought came from this forum 3 months ago however I did not have the harness, video converter, or power supply to check if it works. This month I finally got parts of my supergun to have a video check and this what was outputted.
Originally when I received it, the only issued it had was colors were off and picture alignment which maybe effected by capacitors before it was shipped here. The new problem it developed is the player and enemy sprites are displayed as blue eagle boxes on the bottom of the screen. I'm having a feeling it's either one of the ROMs gone bad or loose connection. As I said earlier, I didn't have the equipment to check on the PCB for 3 months after receiving it. Anyone got an idea what could be wrong with it?
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burgerkingdiamond
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Re: Fabtek Raiden board not outputting correctly

Post by burgerkingdiamond »

In general, always check the +5v on the Jamma edge while under load. It should be between +5v and about +5.15, and check for any damaged pins on chips or bad solder joints.
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beatsgo
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Re: Fabtek Raiden board not outputting correctly

Post by beatsgo »

burgerkingdiamond wrote:In general, always check the +5v on the Jamma edge while under load. It should be between +5v and about +5.15, and check for any damaged pins on chips or bad solder joints.
I checked the 5V pin on the board and it's getting 4.84V when the board turns on. Not good...
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rolins
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Re: Fabtek Raiden board not outputting correctly

Post by rolins »

beatsgo wrote:
burgerkingdiamond wrote:In general, always check the +5v on the Jamma edge while under load. It should be between +5v and about +5.15, and check for any damaged pins on chips or bad solder joints.
I checked the 5V pin on the board and it's getting 4.84V when the board turns on. Not good...
That's not bad thing. All of my boards read 4.6v to 4.8v on their jamma edge and they play fine.

Re-seat any socketed roms and clean the jamma edge, if you haven't done so already. One trick that still helps is when the game is ON, go around the pcb and lightly press down on random components. If holding down a component brings back the picture, then you have a weak solder joint in that spot.
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burgerkingdiamond
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Re: Fabtek Raiden board not outputting correctly

Post by burgerkingdiamond »

beatsgo wrote:
burgerkingdiamond wrote:In general, always check the +5v on the Jamma edge while under load. It should be between +5v and about +5.15, and check for any damaged pins on chips or bad solder joints.
I checked the 5V pin on the board and it's getting 4.84V when the board turns on. Not good...
so turn up the voltage on your power supply and see if it helps.
Let's Ass Kick Together!
1CCs : Donpachi (PCB - 1st loop) Dodonpachi (PCB - 1st loop) Battle Bakraid (PCB) Armed Police Batrider (PCB) Mushihimesama Futari 1.5 (360 - Original) Mushihimesama Futari BL (PCB - Original)
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