[Amps] Advance A1500 48VOLT switched mode PSU

[Jonathan white]

  Dear Team
Has anyone got any info on this power supply.
I have been given this and a 500w wide band  hf amp.
This was part of a QRO commercial hf TX.My neighbor, made the unit  as 
part of the development of the TX ,and each amp had an Advance A1500 
supplying it.
my problem is It is assumed to work,but with volts applied no work.,on 
the front pannel are two multi-way connectors that went to a 
controller,so we think that these are the keys to provoke this psu to work.
The psu  is in good condition with no obvious signs of distress.
If it cant be made to work I will remove the capacitors diodes and 
anything else useful and make a "conventional" psu..
Advance themselves were swallowed up years ago,they were based in 
Bishops Stalford,Herts UK.

                               Regards
                                             Jon