Help with Frogger:

dbpbandit

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I'm working on a Frogger Cocktail game that has no audio. Everything else seems to be working fine but there is no sound. I adjusted the volume and when it's at full I can heart a faint hum but thats it. Any suggestions? Anyone repair these boards? Thanks.

-Dave
 
I'm working on a Frogger Cocktail game that has no audio. Everything else seems to be working fine but there is no sound. I adjusted the volume and when it's at full I can heart a faint hum but thats it. Any suggestions? Anyone repair these boards? Thanks.

-Dave

Does the game go into a test mode? Usually there are sounds generated during the test to help you diagnose audio issues.
 
Question, how do I get this game into test mode? The manual covers where the switches and volume are located but only in an upright version, not the cocktail. Took me a while just to find the volume knob.
 
I am also having issues with my Frogger's sound. There is none. It had worked previously, but would occasionally drop certain sound fx and/or music. Now there is just nothing. I used to be able to solve the problem by unplugging it and plugging it back in, but now, no response. It is a full-size upright cabinet.
 
I worked on this again last night, removed the PCB, removed and cleaned ribbon cable connections but still no sound. I even tried a new speaker, still nothing. Next step will be remove the PCB again and check all of the solder joints, other than that I'm at a loss. Anyone have any suggestions or know of someone who can repair these? Thanks.

-Dave
 
I worked on this again last night, removed the PCB, removed and cleaned ribbon cable connections but still no sound. I even tried a new speaker, still nothing. Next step will be remove the PCB again and check all of the solder joints, other than that I'm at a loss. Anyone have any suggestions or know of someone who can repair these? Thanks.

-Dave
 
I assume you have the 6-pin sound cable plugged into the top board on the PCB? I only ask because this is a common complaint I hear when people try to make Jamma adapters for these boards, and don't realize they need the 6-pin connector on the top connected for sound.
 
I have the Konami 36 pin version and yes it has a 6 pin audio plug on the top board. 3 wires come from that and go to the volume POT and two speakers. I'm going to check the solder joins on those pins and also check the POT with my DMM. You said it's a "common complaint" is there a "common fix" to go with that? ;^) Thanks.
 
The Konami style Frogger boards have a rather complex sound board. It is it's own self contained computer, so to say. It has it's own processor, it's own RAM, it's own ROMs, a couple (semi)custom audio chips, and a fair bit of glue logic. A lot of this stuff is socketed. Did you try reseating the socketed chips?

Edward
 
The same exact thing happened with mine. It was the single channel audio amp. Believe it's a M51516L 9 pin. You should be able to pick one up for around $5. Change it out and you should be back up and running. This said, check your power supply, it's very possible that it's too high, mine was and it fried the amp. I ended up putting in a new power supply to prevent future issues.
 
I have seen these with a broad range of problems so its not safe to say its probably this or that. I have seen bad ram, z80, ttl, amp, psg, eproms. There doesnt seem to be one common probable fail point on these, only that they do have alot of sound problems.
 
I solved my problem yesterday just by making sure all the connections tight and not loose. Pushed on a few connectors, turned the game on to check the sound, and voilà! Full sound, music and FX!
 
I haven't tried re-seating the chips yet, just pushed on them a bit. I also checked the power supply and the voltage is set correctly. I'll check the chips and if that doesn't work I'll grab a M51516L and swap it out. thanks.

The same exact thing happened with mine. It was the single channel audio amp. Believe it's a M51516L 9 pin. You should be able to pick one up for around $5. Change it out and you should be back up and running. This said, check your power supply, it's very possible that it's too high, mine was and it fried the amp. I ended up putting in a new power supply to prevent future issues.
 
I have a similar issue, keep me posted. I had sound for a few minutes and it would quit. Sometimes make a squelch when it quit. Reset the cables a few times and now no sound at all. Got red lines on the video after messing with cables. Tried restting the cables a dozen times, same issue.
 
FYI, the M51516 amp is pretty tough and doesnt go bad often. Not saying it doesnt, just not common for these. If you do need one I have them in my store.
 
Riptor - I am going to try the M51516 AMp (from your store). Is this difficult to replace? Any special tools? Soldering?
Also - do you have a replacement ribbon cable?

I noticed when I wiggle the 6 wire cable (actually 3 wires 6 pins) I do get some static feedback into the speakers, but no sound.

Thanks
 
Riptor - I am going to try the M51516 AMp (from your store). Is this difficult to replace? Any special tools? Soldering?
Also - do you have a replacement ribbon cable?

I noticed when I wiggle the 6 wire cable (actually 3 wires 6 pins) I do get some static feedback into the speakers, but no sound.

Thanks

I use a pace desoldering station so no, its not difficult to replace with the right tools. Your going to want to remove the heatsink assembly prior to desoldering the amp. That will make the job a little easier. Use a little silicone grease on the amp and mount it to the heatsink. Reinstall the heatsink/amp assembly then solder last.
I dont have the cables for the frogger boards. I have worked on alot of frogger boards and have yet to see a bad cable. I do have new ribbon cable. If the connectors are the type you can take apart you can install new cable on the old connectors.
 
Well, I checked everything and still no sound. I didn't replace the amp or the 2SC2320 transistor but I guess that's the next step, that or locate a replacement 'working' board set.
 
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