From - Wed Sep 11 23:17:05 1996 Newsgroups: rec.games.video.arcade.collecting Path: masters0.news.internex.net!newshub.internex.net!newshub1.internex.net!viper.inow.com!newsfeed1.aimnet.com!www.nntp.primenet.com!nntp.primenet.com!netcom.com!spsycho From: spsycho@netcom.com (Brad Beerman) Subject: Re: tech: Frogger Volume Message-ID: Sender: spsycho@netcom10.netcom.com Organization: NETCOM On-line Communication Services (408 261-4700 guest) X-Newsreader: Forte Free Agent 1.0.82 References: <513l1p$f5m@news.sentex.net> Date: Wed, 11 Sep 1996 07:19:20 GMT Lines: 58 rburwell@granite.sentex.net (Rebecca Burwell) wrote: >I noticed that my Frogger board does not have a volume pot on the sound board. >Any ideas on where the sound volume gets regulated? I figure it's got >something to do with the 6 pin connector near the audio amp. Also, what >resistance needs to be used? Here's an article I saved from a while ago about the connection. I did not write this, only copied and pasted it. I thank the original author for taking the time to write this and hope he doesn't mind me posting it... From: woodcock@bnr.ca (Gregg Woodcock) Newsgroups: rec.games.video.arcade.collecting Subject: Frogger; wiring up the sound potentiometer... Date: 17 Dec 1995 06:19:42 GMT Organization: Bell-Northern Research; Richardson, Texas, USA How to add sound to your Frogger board by Gregg Woodcock. If you do not hook up an external potentiometer, you will have no sound from your Frogger PCB. There is a small .100" MTA connector on the top board that has six pins. The 6-pin connector "6P" in the lower-left corner of the upper, smallest PCB is where the volume control goes. Reading from left to right on the top of the PCB and the potentiometer (with the pins of the pot pointing down), starting at 1 the pinout is: pin 2 of 6P goes to pin 1 of the potentiometer (black wire) pin 4 of 6P goes to the pin 2 (wiper) of the potentiometer (white wire) pin 6 of 6P goes to the pin 3 of the potentiometer (red wire) In one of the connection diagrams, they show a two-conductor shielded wire. The shield is used for the pin 6 to potentiometer connection (pin 6 is ground, so this gives you some shielding). In another diagram, they list the wire colors and none of them are indicated as shileded. In another diagram, the potentiometer value is lised as "200K" but this is WRONG! In yet *another* diagram, the correct potentiometer value is listed as 200 Ohms. What I do is mount a regular knob-type potentiomter (i.e. not the mini PCB-mount type) on that gigantic heat sink connected to IC2 (NOTE: be *very* careful that you do not drill "past" the metal and into one of the chips below. If you are at all doubtful that you can pull this off, remove the heat sink from the board to drill it).