[Circuit Diagram for Phihong PSM36W-201 Power Supply?]

One follow-up pice of information that may be useful:

 

This particular model of the iGroove is an early example and it would seem it relies solely on the Firewire port to charge the iPod. It is therefore not compatible with the newer iPods, as these only charge through the USB connection.  

 

It also concerns me a little that the iGroove puts out 18v on this Firewire connection, when the spec for it is 12v. Although I think the early forms of Firewire had a bigger tolerance, so maybe its ok.

[Circuit Diagram for Phihong PSM36W-201 Power Supply?]

Just in case it is useful to someone:

 

I have fixed the PSU. Never did find a circuit diagram, but it was a simple fault in the end.  The smoothing electrolytic capacitor for the 3843 chip was dried out. Replacing this component brought the supply back to life.

 

Fairly easy fix if your competent with a soldering iron.

[Circuit Diagram for Phihong PSM36W-201 Power Supply?]

Hi,

 

Has anybody got a copy of the circuit diagram for one of these supplies?  Mine has failed.

 

It looks like a pretty straightforward design using the 3843 PWM chip, but a diagram would still be very helpful.

 

Thanks.