Hello everyone!

I bought an Electro Harmonix Small Stone Phase Shifter V2 from eBay in a “not working” condition. I am an intermediate solderer so thought I’d have a go at repairing it.

Plugged in to a guitar and amp the signal passes both bypassed and not. I can hear the colour switch changing the sound when the effect isn’t bypassed. I guess the LFO is kaput but before I go ordering some CA3094 ICs I thought I’d ask someone else for a second opinion.

To me the board looks clean with no unwanted bridges and no components look burned out – however the 33uF electro capacitor has a bit of it’s plastic wrapping chipped off – it doesn’t look like it’s leaked though. +VE on the board reads at 8.7V and I’ve only tried running it on a battery so far.

If someone could have a check of these readings that would be really helpful! Thanks in advance!

Pot reading of 1.2M ohms

All phase ICs reading the same with Rate pot fully clockwise:
Pin 1 – 0v
Pin 2 – 1.72v
Pin 3 – 1.79v
Pin 4 – 0v
Pin 5 – 8.5v
Pin 6 – 8.5v
Pin 7 – 0.76v
Pin 8 – 0.17v (this pin seemed to start with a reading of 1v or so and dropped down to 0.17v where it stayed)

LFO IC reading with Rate pot fully clockwise:
Pin 1 – 0.71v
Pin 2 – 4.62v
Pin 3 – 4.77v
Pin 4 – 0v
Pin 5 – 0.66v
Pin 6 – 0.17v
Pin 7 – 8.5v
Pin 8 – 4.77v

LFO IC with Rate pot at noon:
Pin 1 – 0.5v
Pin 2 – 6.5v
Pin 3 – 7v
Pin 4 – 0v
Pin 5 – 0.66v
Pin 6 – 0v
Pin 7 – 8.73v
Pin 8 – 7.05v

LFO IC with Rate pot fully counter clockwise
Pin 1 – 0.07v
Pin 2 – 6.8v
Pin 3 – 7.44v
Pin 4 – 0v
Pin 5 – 0.52v
Pin 6 – 0.v
Pin 7 – 8.74v
Pin 8 – 7.5v

REALLY GRATEFUL IF ANYONE CAN HELP!!!!