Ibanez - PH-5 Phaser  [schematic]

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Ibanez - PH-5 Phaser

Postby swt » 12 Feb 2008, 12:37

any leads where to get it? thanks!
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Postby analogguru » 12 Feb 2008, 20:01

sorry, i have only a hand drawn (traced) schematic of the PH5, but the Ibanez PT9 schematic is nearly identical to the PH5.

http://www.freestompboxes.org/viewtopic.php?t=188

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Postby swt » 13 Feb 2008, 11:28

wow ag thanks a lot for the info and schem.
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Postby swt » 13 Feb 2008, 11:40

looks like it's got a fixed stage before and after the sweeping stages right?, so is this a 6 stage phaser?. can someone explain how that feedback works?. It's going to the - and+ inputs of the opamp...excuse my ignorance...
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Re: Ibanez - PH5 ( Phaser )  [schematic]

Postby Dirk_Hendrik » 30 Oct 2010, 17:17

http://www.dirk-hendrik.com/temp/ibanez_ph5.pdf

And C25 is a 22n. In it's own labelling as well as on the Fluke87
Sorry. Plain out of planes.

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Re: Ibanez - PH5 ( Phaser )

Postby analogguru » 30 Oct 2010, 20:03

OhOhOh.... I think we have different units.
The FETs in mine are 2SK246GR.
C25 IS marked 47n in mine (not measured).
CR1 + CR2 are (not gooped) a 100k with a 1n ceramic in parallel.
ZD1 I noted as 4V7 (ZD 2 maybe too) - I have to recheck that.

The rest appears to be the same.

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Re: Ibanez - PH5 ( Phaser )

Postby Dirk_Hendrik » 31 Oct 2010, 08:34

Nope we don't
I meant C24.
Which I had to check in turn in a PT9 since the PT9 service manual says it's a 2n cap.
right on the Fet's though ;)

Seriously interested in that discrete version of the CR's. Is that both components soldered on the same pads?

PCB-PH5-1010A
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Re: Ibanez - PH5 ( Phaser )

Postby analogguru » 31 Oct 2010, 23:18

Dirk_Hendrik wrote:Seriously interested in that discrete version of the CR's. Is that both components soldered on the same pads?

As you may know, for my friend dirk I would nearly do everything. So I did some sports and moved away more than hundred pedals for grabbing the Ibanez PH5 to take a shot of the discrete CR´s.

Here it is - from a 1996 pedal:

Ibanez_PH5_96_CR2.jpg


Also I took a picture of the C24 - yes it is 22n too:
Ibanez_PH5_96_C24.jpg


The I thought, maybe I should better control the zener-diodes, could be a mistake by me, but both are 4V7 - here is ZD2:
Ibanez_PH5_96_ZD2.jpg


Then I thought, maybe this new stuff..... so I opened one from 1991 - you can recognize this on the different resistors. But still, ZD 2 is 4V7:
Ibanez_PH5_91_ZD2.jpg


Very interesting.... and ZD1 ?
Ibanez_PH5_91_ZD1.jpg

Ooops..... It is 4V7 too..... :hmmm:

Dirk_Hendrik wrote:PCB-PH5-1010A

The 1991 pcb is marked PCB-PH5-0101A only on the component side.
The 1996 pcb is marked PCB-PH5-0101A on both, the track and component side.

BTW.... How is the prosperity of the aeroplanes ? :wink:

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Re: Ibanez - PH5 ( Phaser )

Postby Dirk_Hendrik » 01 Nov 2010, 08:11

analogguru wrote:BTW.... How is the prosperity of the aeroplanes ? :wink:
analogguru


Fine. Those work according to the maintenance manual and Parts list. No way to deviate from thoise, even if what is described makes little to no sense.
Sorry. Plain out of planes.

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Re: Ibanez - PH5 ( Phaser )

Postby xmikes » 27 Apr 2011, 21:55

I have one this pedal but "speed" control does not work. I have added resistor 1Meg from pin 2 to pin 6 on IC TL022 and it starts working. But I'm not sure what is wrong and if my fix is OK. Does anybody have similar problem? Or any ideas what is wrong? Thanks.
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