Boss ACA Power FIX?

[sevenisthenumber]

I have a few old Japanese boss pedals and i want to make them run on a new power supply instead of ACA. How is this done?
Any info on this is greatly appreciated.

[wampcat1]

you'll probably need to jumper a diode and resistor. Which one? We'd have to see the schematic.
bw

[sevenisthenumber]

its the OD-1.

When i turn it on, it takes like 2 sec to come on and im assuming its this issue???

[geir_helgi]

There's this trick:

Powering ACA pedals with a PSA power supply
Powering the older pedals designed for 12V DC input with either a newer ACA or PSA adapter will not work very well. The voltage drop over the resistor and diode will prevent the pedal from getting enough power and its LED will usually only glow faintly. The solution is to use a daisy chain and plug in another pedal designed for the newer ACA or PSA adapter. The lead between the two pedals will short the resistor diode pair and the pedal will receive full power.

Depending on the mains voltage there are 4 were versions of the ACA adapter. ACA-100, ACA-120, ACA-220 and ACA-240. The number denotes the mains voltage that the adpapter should be plugged into. The 9V version of the ACA adapter has a G appended at the end of its name. Pictured is the ACA-120G which is the version sold in the USA.

http://bossarea.com/other/aca.asp


I have an old Boss LM-2 Limiter and it's ACA, it's daisy chained with a Boss DD-6 and a DD-3 -it works!
You just have to turn on a newer pedal first

[twangquack]

I did this to an early Japanese GE-7 but I don't have the schematic in front of me ... of course you'd need the schematic to determine what needs to be done for each particular pedal. As I recall (in the GE-7), the blue wire needed to be unsoldered from the board (connection between power plug and board) and re-soldered to the same location on the board as the yellow wire ... this is all from memory and may not apply (obviously) to all of these early Boss pedals. But it may help if you have a Japanese GE-7.


You might check here for the necessary schematic:
http://www.freeinfosociety.com/electronics/schempage.php?cat=1

[sevenisthenumber]

i recall seeing in Brain Wamplers book i think about jumping a resistor and a diode in older sd-1's??  I cant remember.......