FIXED :gunforce working but only in red

PCB problems and fixes
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Hrvat9
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FIXED :gunforce working but only in red

Post by Hrvat9 »

got this gunforce locally but it’s only playing in red???
What could be the cause of this?
Also anyone know what the third set of dip switches at the top right of the board do?
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Last edited by Hrvat9 on April 25th, 2018, 10:44 pm, edited 1 time in total.
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Hrvat9
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Re: gunforce working but only in red

Post by Hrvat9 »

Just noticed at LC3 one of the capacitors(?) has been broken off. The others have cold solder cracks also. Can this part be found/anything equivalent to it ?
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Last edited by Hrvat9 on March 19th, 2018, 10:42 pm, edited 1 time in total.
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Flinnster
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Re: gunforce working but only in red

Post by Flinnster »

Yep almost certainly. I guess you have other PCBs working OK on that monitor so you know it's a board fault.

I looked into these components at one point, they are a cap and 2 resistors combined I think.
Maybe worth reflowing the pins on the ones that remain to see if you get any other colours back?

Specifically look at pins 13 (top side) and 'N' (solder side). See what components they go to.
13 does seem to go to the missing component LC3. That'll explain your lack of blue video.
Last edited by Flinnster on March 19th, 2018, 10:45 pm, edited 1 time in total.
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Hrvat9
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Re: gunforce working but only in red

Post by Hrvat9 »

Flinnster wrote:Yep almost certainly.
I looked into these at one point, they are a cap and 2 resistors combined I think.
Maybe worth reflowing the pins on the ones that remain to see if you get any other colours back?

Just did that but still only red.
LC4 is snapped flush off too on one of the resistors -_-
Cap says 101m 100v
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Re: gunforce working but only in red

Post by Flinnster »

Yeah no joy finding these components again.. hmm.. let me see if I can find schematics.
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Re: gunforce working but only in red

Post by Flinnster »

OK..

DSS310-55B EMI Filter
emi-filter.jpg
Not sure if this is even compatible:
http://www.ictr.co.kr/product/goods_det ... idx=114373
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Re: gunforce working but only in red

Post by Hrvat9 »

Flinnster wrote:OK..

DSS310-55B EMI Filter
emi-filter.jpg
Not sure if this is even compatible:
http://www.ictr.co.kr/product/goods_det ... idx=114373
Yup other pcbs work :).
I found them on eBay but in the uk with no shipping quote to Canada:( I sent the seller a message so hopefully he’ll be ok sending them across the pond
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Re: gunforce working but only in red

Post by Flinnster »

I'm sure we can sort something out if they won't 8-)
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Re: gunforce working but only in red

Post by Hrvat9 »

Flinnster wrote:I'm sure we can sort something out if they won't 8-)
:awe: :awe: :awe:
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Re: gunforce working but only in red

Post by Hrvat9 »

Got them in, soldered in and we’re in business 8-)
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Re: gunforce working but only in red

Post by Flinnster »

Waahheey! Reee-sult! :D
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Re: gunforce working but only in red

Post by Hrvat9 »

Flinnster wrote:Waahheey! Reee-sult! :D
:awe: :awe: :awe:
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Re: gunforce working but only in red

Post by Flinnster »

Just a bit of an IREM pcb fan here. Would love a Gunforce 1 + 2 someday. And an Undercover Cops when I don't need any kidneys.
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Re: gunforce working but only in red

Post by Hrvat9 »

Flinnster wrote:Just a bit of an IREM pcb fan here. Would love a Gunforce 1 + 2 someday. And an Undercover Cops when I don't need any kidneys.
I’ll sell you it! pm?
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Re: gunforce working but only in red

Post by Flinnster »

(Checks price of kidney donor market.... :awe: )
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