Hello again,
I plugged in an old Ibanez PT 9 Phaser pedal i had given to me, and it just squeals at me. Sounds like a guitar that's feeding back.
Wheather i step on the switch or not, it just squeals. The "on" light is always on too.
I've pulled it apart and everything 'seems' to be inplace. Any tips on where i could start?
Thanks.
EDIT
turning the knobs does modulate the sound (as much as you can witha squealing noise)
Pressing the on/off switch does turn the light on and off (but it still squeals regardless)
A wire IS missing from one of the input or output jacks (i pulled it apart and didnt label which is which)
ok the wire that is missing is for the battery ground, no biggy.
I should mention that the pedal used to work, i played through it before, it was just a little fuzzy and noisy. Now no signal gets through and all i get is a loud squeal.
I have a dead one on the bench now. Sure a lot of stuff in there!!!! I'm poking around some more, just thought I'd post since I have the same unit...
Anyone savy with these?
John
So where should i start? Grab a multimeter and start checking everything?
Resolder everything? Start replacing bits one by one? Which components first?
Honestly ive got a squealing box.... it can only be half broken right?
Have a look at http://geofex.com/fxdebug/fxdebug.htm (http://geofex.com/fxdebug/fxdebug.htm)
In the absence of a schemo, I would clean it up, replace all the electro caps, and resolder the joints. If it still squealed, I would locate and open up the feedback pot.
Oooo at a glance this schematic for a PT909 is the same as far as i can tell. Pots, wire colours etc. The ICs are different tho
http://www.freeinfosociety.com/electronics/schematics/audio/ibanezpt909.pdf
But what can i do now i couldnt do without it?
So after i resolder every joint, and replace all the caps, what can i do next?
I got the same problem with my phaser PT-9,,,,how did you solve this problem? It is not working an screamingin any position
thank you for you help
yo
France
up
any idea....thanks
deedeeramone,
I don't know if you realize that you can click on a member's name to see when they last posted.
Fr_3_aK made 20 posts with the last one being September 2006.
That was 6 years, 7 months, and 19 days ago!
To put it in other terms:
346 weeks and 1 day.
or..2,424 days.
or..58,152 hours.
or..3,489,120 minutes.
If you are waiting on a reply from him.....it may be a while! I don't believe he's an active member any longer. ;)