Busted phase45 LFO and what the funk happened to it?

[nordine]

Folks, so, I borrowed my phase45 to a friend and he returned it non-functional  

After fiddling around a bit I found a fat capacitor (DC filtering) and both ICs fried, so I took them away (edit: AND replaced the ICs), then the LFO light lit up, but didn't show any LFO activity..... so I thought if both ICS and a capacitor were busted, other capacitor might be as well dead, so I took the LFO capacitor (103) out to see if was the one... but I got nothing... the light stays there, no LFO'ing

Btw, the phase section and audio path is fine, its just the dead LFO

Questions;
What on earth happened to the pedal?
How can I get the LFO back?

Thanks a lot!

[frequencycentral]

Sounds like it got reverse polarity. The polarity protection diode is probably burnt out too. The electrolytic timing cap for the LFO is probably blown too. It's 10uF, the +ve side is connected to the speed pot lug 3, the -ve side is connected to ground.

[nordine]

Sounds like it got reverse polarity. The polarity protection diode is probably burnt out too. The electrolytic timing cap for the LFO is probably blown too. It's 10uF, the +ve side is connected to the speed pot lug 3, the -ve side is connected to ground.

hi 

yeah, i thought about reverse polarity too... theres no polarity protection diode lol... thats why the ICS got caught

you mean the LFO smoothing 10uf cap?... the timing cap is 103, as far as i know
ill take out all caps surrounding the LFO area... ..damn, ill prolly damage the board 

[frequencycentral]

Sounds like it got reverse polarity. The polarity protection diode is probably burnt out too. The electrolytic timing cap for the LFO is probably blown too. It's 10uF, the +ve side is connected to the speed pot lug 3, the -ve side is connected to ground.

hi  

yeah, i thought about reverse polarity too... theres no polarity protection diode lol... thats why the ICS got caught

you mean the LFO smoothing 10uf cap?... the timing cap is 103, as far as i know
ill take out all caps surrounding the LFO area... ..damn, ill prolly damage the board  

The 10uF is THE timing cap. The 103 does have a small effect on the speed range of the LFO, but is mainly there to soften the changearound from upward sweep to downward sweep. If you remove the 103 the LFO will still work, though the speed range will change slightly, and you will notice a click at the LFO peaks and troughs.

...and worth adding a 1N4001 across the power rail before you lend it out again!

[nordine]

you´re right, will took it out too!

[nordine]

wasnt the caps, well maybe

but it was mainly.... unsoldered stuff 

FIXED!