Ibanez - PH-5 Phaser  [schematic]

All about modern commercial stompbox circuits from Electro Harmonix over MXR, Boss and Ibanez into the nineties.
Post Reply
swt
Breadboard Brother
Posts: 113
Joined: 07 Sep 2007, 17:52
Has thanked: 4 times
Been thanked: 13 times

Post by swt »

any leads where to get it? thanks!

analogguru
Old Solderhand
Posts: 3283
Joined: 26 Jun 2007, 14:58
Been thanked: 110 times
Contact:

Post by analogguru »

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

analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.

swt
Breadboard Brother
Posts: 113
Joined: 07 Sep 2007, 17:52
Has thanked: 4 times
Been thanked: 13 times

Post by swt »

wow ag thanks a lot for the info and schem.

swt
Breadboard Brother
Posts: 113
Joined: 07 Sep 2007, 17:52
Has thanked: 4 times
Been thanked: 13 times

Post by swt »

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...

User avatar
Dirk_Hendrik
Old Solderhand
Posts: 4249
Joined: 03 Jul 2007, 09:44
Location: Old Amsterdam
Has thanked: 221 times
Been thanked: 832 times
Contact:

Post by Dirk_Hendrik »

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.

http://www.dirk-hendrik.com

analogguru
Old Solderhand
Posts: 3283
Joined: 26 Jun 2007, 14:58
Been thanked: 110 times
Contact:

Post by analogguru »

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.

analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.

User avatar
Dirk_Hendrik
Old Solderhand
Posts: 4249
Joined: 03 Jul 2007, 09:44
Location: Old Amsterdam
Has thanked: 221 times
Been thanked: 832 times
Contact:

Post by Dirk_Hendrik »

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
Sorry. Plain out of planes.

http://www.dirk-hendrik.com

analogguru
Old Solderhand
Posts: 3283
Joined: 26 Jun 2007, 14:58
Been thanked: 110 times
Contact:

Post by analogguru »

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:

analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.

User avatar
Dirk_Hendrik
Old Solderhand
Posts: 4249
Joined: 03 Jul 2007, 09:44
Location: Old Amsterdam
Has thanked: 221 times
Been thanked: 832 times
Contact:

Post by Dirk_Hendrik »

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.

http://www.dirk-hendrik.com

xmikes
Posts: 8
Joined: 17 Mar 2009, 23:25
Location: Czech Republic

Post by xmikes »

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.

Post Reply