iMac 20" PSU 661-3350 - WT7515 Supervisor chip problem

[Fedguy]

Does anyone know whereto buy the dreaded WT7515 chip?

thx

[Fedguy]

Re: WT7515 chip buy?

AC/Bel 661-3350
iMac G5 20"
First left green LED comes on Logic board but when you push the power button nothing happens. I have 20v and 5v on the connector.

We traced the voltages on the WT7515 which has the 5v sense in but no 5V out

[Toasty]

Re: WT7515 chip buy?

What is the API number on the board? e.g., API 3PC96

Do you have the datasheet for the chip?

The chip is a OC/OV/UV supervisor.

What repairs, if any, have you done to the supply?

Check Q1 (1P) transistor on the HOT side near the TOPSwitch device. Look for a discolored band running down the middle of the chip.

Toast

[Fedguy]

Re: iMac 20" PSU 661-3350 - WT7515 Supervisor chip problem

Has anyone found a supplier yet for the WT7515?

[Toasty]

Re: iMac 20" PSU 661-3350 - WT7515 Supervisor chip problem

Not yet.

This is why I asked the questions above. You may not have a problem with the chip.

Toast

[Toasty]

Re: iMac 20" PSU 661-3350 - WT7515 Supervisor chip problem

eBay