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Title: Frogger sound help please Post by: Meanstreak05 on May 20, 2016, 12:54:29 pm Hi I am having problems with my Frogger I looked up other threads on here I have checked my voltages , changed the volume pot I keep having the same humming coming out of the speaker. I am having trouble finding info on my pcb also the number is 834-0084 on the main board the video is 834-0074 I have a Frogger manual but that pcb is not listed in my books it skips my number and goes to 834-0085 . the heat black sink that's by the edge connector gets really hot to the touch I didn't know if this was normal I didn't know if this helped but the numbers on my stickers were p/n:700-0069-00 please help me out thank you
Title: Re: Frogger sound help please Post by: P-feif on May 20, 2016, 03:20:37 pm Hopefully the schematics you're looking for are here...
http://www.arcade-museum.com/game_detail.php?game_id=7857 Title: Re: Frogger sound help please Post by: Meanstreak05 on May 20, 2016, 04:32:03 pm No I looked on there also thank you though
Title: Re: Frogger sound help please Post by: TheGuru on June 14, 2016, 07:05:08 am On Frogger the sound is generated on the top board.
Assuming the AMP is getting 12v, wet your finger and touch the underside of the PCB where the amp is multiple times. Touch all of the pins and somewhere you will hear a pop sound. If no pop the AMP IC may be bad or the electrolytic caps that connect the AMP IC output pin to the edge connector pin (which goes to the speaker) may be bad. If you hear a pop, re-seat the ROMs and/or replace the sockets. If that doesn't help you have a RAM/CPU or logic fault. The PCB is pretty easy to fix. Do this in order (on the top board).... Clean 18-pin edge connector both sides Re-seat ROMs Replace sockets Replace RAM Replace Z80 Find logic fault |