Ibanez BPL Bi-Stage Phaser and Ibanez PH10 Bi-Mode Phaser

All about modern commercial stompbox circuits from Electro Harmonix over MXR, Boss and Ibanez into the nineties.

Ibanez BPL Bi-Stage Phaser and Ibanez PH10 Bi-Mode Phaser

Postby floris » 06 Feb 2018, 19:48

I have both Ibanez Phasers currently opened up, saw no topic on these pedals, so I took some pictures.

The Ibanez BPL Bi-Stage Phaser and Ibanez PH10 Bi-Mode Phaser have the same circuit and PCB.
Only the potentiometer types are different, values are the same.

Schematic:
Ibanez_PH10_Schematics.png


Ibanez BPL Phaser
2018-02-06 18.51.46.jpg


Ibanez PH10 Phaser
2018-02-06 18.48.39.jpg
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floris
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Re: Ibanez BPL Bi-Stage Phaser and Ibanez PH10 Bi-Mode Phase

Postby floris » 06 Feb 2018, 19:56

Picts of the Ibanez PH10 Phaser PCB:

2018-02-05 20.27.08 - klein.jpg


2018-02-05 20.27.40.jpg


2018-02-05 20.29.24.jpg


2018-02-05 20.29.52.jpg


2018-02-05 20.27.25.jpg


2018-02-05 20.28.19.jpg
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Re: Ibanez BPL Bi-Stage Phaser and Ibanez PH10 Bi-Mode Phase

Postby floris » 06 Feb 2018, 20:02

After adjusting the Width trim-pot, VR4 1k Ohm, I found that the maximum range of the Width could be a bit larger so that the Phaser can "move" from more low to more high.
For this I changed R66 82k Ohm resistor, that is in series with the Width pot, on the potentiometer PCB that holds the LFO, into a 62k Ohm resistor.
Then I adjusted the Width trim-pot again.

2018-02-06 17.59.36.jpg
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