Strikers 1945 2 buzzing sound

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Hrvat9
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Strikers 1945 2 buzzing sound

Postby Hrvat9 » May 9th, 2017, 2:13 am

Any anyone tell me what cap is missing here?(bottom left, its C13) It's hard to tell from internet pics so if someone could look at their board and let me know that would be awesome :) I have all sound effects but music is just buzzing, definitely related to my missing cap in the sound area
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Last edited by Hrvat9 on August 22nd, 2017, 2:15 am, edited 1 time in total.
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Re: Strikers 1945 2 missing big cap

Postby Hrvat9 » May 9th, 2017, 2:54 am

Finally found a pic, 25v 2200uf at c13. Can anyone confirm these values?
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Re: Strikers 1945 2 missing big cap

Postby invzim » May 9th, 2017, 10:43 pm

I got a Strikers 1945 III, essentially the same, and it has a cap with specs:
2200uF 25V , 85 degrees C, diameter is about 16.5mm and height 25mm. For posterity, the manufacturer is TOSHIN KOGYO (TK).

You can replace it with a part that has higher temperature and voltage rating.
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Re: Strikers 1945 2 missing big cap

Postby Hrvat9 » May 11th, 2017, 5:38 am

invzim wrote:I got a Strikers 1945 III, essentially the same, and it has a cap with specs:
2200uF 25V , 85 degrees C, diameter is about 16.5mm and height 25mm. For posterity, the manufacturer is TOSHIN KOGYO (TK).

You can replace it with a part that has higher temperature and voltage rating.


Thank you for that :):):) time to cap this sucker
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Re: Strikers 1945 2 missing big cap

Postby AeroCityMayor » June 26th, 2017, 7:05 pm

Sorry for the necrobump but I'm posting more for future searchers ;)

That is in fact the correct cap but it doesn't really do a great deal. I have never seen on actually fully connected/soldered into position on any of my Psikyo pcbs.

HTH

Cheers,

Ralph.
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Re: Strikers 1945 2 missing big cap

Postby Hrvat9 » June 28th, 2017, 5:48 am

AeroCityMayor wrote:Sorry for the necrobump but I'm posting more for future searchers ;)

That is in fact the correct cap but it doesn't really do a great deal. I have never seen on actually fully connected/soldered into position on any of my Psikyo pcbs.

HTH

Cheers,

Ralph.


Really? My game would just hum and buzz before I put that cap in. The sound is super low now, still hums and the amp gets really hot but I at least hear the game play music and sound effects so hopefully a recap in the sound section will fix it. Or is something else making the amp heat up like that ?
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Re: Strikers 1945 2 missing big cap

Postby neocps1 » June 28th, 2017, 7:30 am

the amp gets hot when there is oscillation. this is often due to bad caps or bad solders
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Re: Strikers 1945 2 missing big cap

Postby Hrvat9 » June 29th, 2017, 5:32 am

neocps1 wrote:the amp gets hot when there is oscillation. this is often due to bad caps or bad solders


Perfect thAnks for the answer:). Got the caps today. First thing tomorrow they're going in :awe:
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Re: Strikers 1945 2 missing big cap

Postby neocps1 » June 29th, 2017, 6:19 am

hope you can fix it !
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Re: Strikers 1945 2 missing big cap

Postby Hrvat9 » August 22nd, 2017, 2:13 am

Finally got to this, changed the caps and still annoying buzzing game music and sound effects playing , amp still gets hot
Reflowed some of the chips in the sound area and still buzzing, hot amp

What do I do :(?
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Re: Strikers 1945 2 buzzing sound

Postby JackieHarris » August 22nd, 2017, 3:41 pm

I don't have a solution, but this might be of interest: I had the same issue with a Strikers 1945 II board - buzzing, distorted sound - and VectorGlow replaced all the electrolytic caps and the sound amp, and it STILL didn't fix the problem!

The only other possibilities were replacing the op amp or the Yamaha sound chip, but the only place known to source them would be from another Strikers board! So we gave up at that point.

I hope you find the answer! Please tell me if you do ;)
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Re: Strikers 1945 2 buzzing sound

Postby Sunder » September 1st, 2017, 2:30 pm

hey can you post a picture of the board again? Both solder and component side, high res. Let me try and help here.
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Re: Strikers 1945 2 buzzing sound

Postby Hrvat9 » September 2nd, 2017, 9:33 pm

Sunder wrote:hey can you post a picture of the board again? Both solder and component side, high res. Let me try and help here.


Will do!
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Re: Strikers 1945 2 buzzing sound

Postby Sunder » September 4th, 2017, 5:16 pm

Yeah, let me know. I seriously would like to help here, sounds actually like some simple termination or short issues. Op amp going hot is a big indicator. Even if the Op amp needs replacing you can usually just bypass that and find another solution for that.
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Re: Strikers 1945 2 buzzing sound

Postby Hrvat9 » January 8th, 2018, 3:30 am

Sunder wrote:Yeah, let me know. I seriously would like to help here, sounds actually like some simple termination or short issues. Op amp going hot is a big indicator. Even if the Op amp needs replacing you can usually just bypass that and find another solution for that.



Finally dug this out of storage , Here you go
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Re: Strikers 1945 2 buzzing sound

Postby Hrvat9 » January 8th, 2018, 3:32 am

Pic 2
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Re: Strikers 1945 2 buzzing sound

Postby Spork » January 10th, 2018, 8:25 pm

Don't these Psikyo boards almost always have a little buzz?
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Re: Strikers 1945 2 buzzing sound

Postby Sunder » January 10th, 2018, 11:55 pm

Yeah they do, but he mentioned it being buzzy music.
Hrvat9, I can't tell much with those close up pictures, would probably need a high res of the whole board.
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Re: Strikers 1945 2 buzzing sound

Postby Hrvat9 » January 11th, 2018, 4:48 am

Sunder wrote:Yeah they do, but he mentioned it being buzzy music.
Hrvat9, I can't tell much with those close up pictures, would probably need a high res of the whole board.


Okay I’ll get one for you tomorrow
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