Phoenix Gold eq

[vincegironda]

Hi all I have a Phoenix Gold eq2125 which isn't powering on. Could the Sg2525a be at fault? The input voltage is reading 3.5v DC.

 

[Perry Babin]

Where are you reading 3.5v?

 

[vincegironda]

Pin 9 3.08v
Pin 13 3.84v
Pin 15 3.83v
Pin 16 2.27v

 

[Perry Babin]

Follow the circuit back from 13-15 to find the transistor feeding those pins.

I'm assuming that the supply voltage feeding the B+ and remote are 12v.

 

[vincegironda]

13 and 15 lead back to a ZTX 749 PNP transistor, there's 12.3v DC at the first leg and 3.8v DC at the leg connected to pin 13 and 15

 

[Perry Babin]

To know if it's defective, you need to post the voltage on all 3 terminals.

 

[vincegironda]

Thanks Perry, it was defective. I replaced it with another PNP and it's working again.