Author Topic: Phaser is screaming at me. Ibanez PT 9  (Read 3408 times)

Fr_3_aK

Phaser is screaming at me. Ibanez PT 9
« on: September 13, 2006, 07:17:10 AM »
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.

Fr_3_aK

Re: Phaser is screaming at me. Ibanez PT 9
« Reply #1 on: September 13, 2006, 08:09:49 AM »
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)

Fr_3_aK

Re: Phaser is screaming at me. Ibanez PT 9
« Reply #2 on: September 13, 2006, 09:01:51 AM »
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.

John Lyons

Re: Phaser is screaming at me. Ibanez PT 9
« Reply #3 on: September 13, 2006, 01:48:30 PM »
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

Basic Audio Pedals
www.basicaudio.net/

Fr_3_aK

Re: Phaser is screaming at me. Ibanez PT 9
« Reply #4 on: September 14, 2006, 12:06:34 PM »
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?

R.G.

Re: Phaser is screaming at me. Ibanez PT 9
« Reply #5 on: September 14, 2006, 01:13:17 PM »
Have a look at 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.
R.G.

In response to the questions in the forum - PCB Layout for Musical Effects is available from The Book Patch. Search "PCB Layout" and it ought to appear.

Fr_3_aK

Re: Phaser is screaming at me. Ibanez PT 9
« Reply #6 on: September 15, 2006, 03:27:41 AM »
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?
« Last Edit: September 15, 2006, 03:48:45 AM by Fr_3_aK »

Fr_3_aK

Re: Phaser is screaming at me. Ibanez PT 9
« Reply #7 on: September 22, 2006, 10:06:33 AM »
So after i resolder every joint, and replace all the caps, what can i do next?

deedeeramone

Re: Phaser is screaming at me. Ibanez PT 9
« Reply #8 on: April 09, 2013, 05:02:06 PM »

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

deedeeramone

Re: Phaser is screaming at me. Ibanez PT 9
« Reply #9 on: April 10, 2013, 03:03:09 PM »
up

any idea....thanks

armdnrdy

Re: Phaser is screaming at me. Ibanez PT 9
« Reply #10 on: April 10, 2013, 04:59:42 PM »
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.  ;)
I just designed a new fuzz circuit! It almost sounds a little different than the last fifty fuzz circuits I designed! ;)