I recently finished my install of the UAV Rev D plus audio companion board in my rev 14 2600 woody NTSC version and it all looks great. Huge improvement over RF especially since my adapter had seen better days.
Anyways, I noticed there isn't a write up for the 4-switch 2600s yet, so hopefully this post can help bring some of the pieces from this forum together.
Things to note:
- Basic board is used for install.
- Jumpers are NOT needed. Those are for configuring the Plug-In board socket pins.
- This version 2600 has a TIA chip, not a CD4050.
- The pinout has changed from Rev C to Rev D. The only diagram I found illustrating the pinouts referenced Rev C, So I have included an updated version for the Rev D board. This tripped me up initially!
- The pinout is also printed on the UAV boards soldermask as another reference. Follow that over any conflicting references you may find.
***First picture is the board I am working with (rescued Atari from what appears to be a pretty rough life):
Installing the UAV
Here are the pinouts that I am using along with the wirecolors used in my later picture:
- TIA pin 2 --- UAV Sync (White/Brown stripe)
- TIA pin 5 --- UAV LUM1 (Orange)
- TIA pin 7 --- UAV LUM3 (Green)
- TIA pin 8 --- UAV LUM2 (Blue)
- TIA pin 9 --- UAV Color in (Brown)
- UAV 5V and Ground are taken from commonly used locations in other 2600 4 switcher installs as shown in later pictures.
- UAV C (composite output) --- Center pin of composite RCA jack (White/Brown stripe)
- UAV G (composite ground) --- Ground pin of composite RCA jack (White/Green stripe)
- TIA pin 6 lifted --- From my understanding, Rev 1-15 do not have a color burst circuit so this is normally not necessary, but my board had an added 680 ohm resistor soldered from pin 6 to pin 9. I lifted a leg of the resistor and pin 6 of TIA.
***Second picture is the updated pinouts I used. Hopefully this is large enough to read.
***Third picture is the board after it is wired
Connecting the Audio Companion Board(AC Board)
- 4-switcher uses 4 connections on the AC Board. 5V, GND, iA, and Out
- The board is designed to straddle a surface mount component on the board, I chose to vertically mount mine across a resistor close to the RF output jack. You can probe around the board and find your own location if you like, just find a sold GND and 5V connection.
- Since I didn't get a good picture of my AC Board, giving the wire colors referenced in the picture below should give you an idea of how I have it installed.
- 5V - taken directly from Atari Board
- GND - taken directly from Atari Board. Brown wire connected to same point and ran to GND tabs of audio RCA jacks
- Out - Green wire going to center pin of both RCA jacks
- iA - (White/green stripe) I pulled from a close resistor that directly traces to TIA pins 12 and 13. These pins are tied together on the circuit board and is the sole tap for audio out. Location shown in picture.
***Fourth picture is my installed AC Board:
***Fifth picture are the final connections running to my RCA output jacks:
And that is it! I hope this can be helpful to someone that is installing into one of these machines, and if anyone finds any mistakes with this post, please correct me.
Thanks for reading, and good luck.