dCS Verdi Transport. How to change the voltage

[vadimgal]

I removed the socket with jumpers and tried to trace the pins.
Pin 7 and P4 connected with N. To trace the LINE is more complicated . The race from L is going through filter and to FBC40S DRAIN ( which is close to SMD capacitor) and no any other connections.
PIN 9 is connected to 6 pins ( primary trafo winding) socket ONLY.
Thanks.

 

[chrisng]

Can you check if pins 0 and 2 are connected to LIVE?

Red lines are 100V jumper setting, yellow lines are pcb copper trace. Please check if the drawing is correct.

 

[vadimgal]

Yellow lines are correct ones . Neutral line is correct and going to N incoming POWER socket. Line ( white L on your picture) is coming to C12 and C13 capacitors and to MOSFET-2 DRAIN.
On the board are two MOSFETs. The LINE from the POWER socket is coming to SCHAFFNER filter and to MOSFET-1 DRIAN,

 

[chrisng]

Thanks, it seems the 120V jumper setting in post#20 is logical. But I don't know if there any modifications to the active circuitry involved other than swapping jumpers.

However, I just realizes the dcs Verdi is a US$11k transport!!! It's not illogical to spend $600 for a voltage conversion through factory authorized service.

 

[vadimgal]

600us plus the shipping and taxes will come to 1000$ . This used Transport cost 3000 $ on the market .
dCS support in US is sucks .They are liars .
Should I try to to change the jumpers setting as you suggest in post # 20?

 

[chrisng]

Have you tried the dcs.community forum?

If you want to try the 120V jumper setting, this is my suggestion:

1. Before changing mains voltage, measure transformer secondary voltage.
2. Use a DBT with a 40 or 60W incandescent bulb when you first time power up the Verdi with 120V mains. Better yet, Plug in a "kill a watt" to monitor the Voltage, Ampere and Wattage on the Verdi.
3. The transformer secondary voltage should be very close or similar before and after voltage conversion.

Good luck!

 

[chrisng]

Line ( white L on your picture) is coming to C12 and C13 capacitors and to MOSFET-2 DRAIN.
On the board are two MOSFETs. The LINE from the POWER socket is coming to SCHAFFNER filter and to MOSFET-1 DRIAN,

I believe the two FBC40S Mosfet are just acting as a relay, with the control signal coming from the 73A optocoupler. This explains why LIVE is connected to Mosfet-1 and Mosfet-2 to pins 0 and 2.
The 120V jumper settings I suggested in post #20 should work! However, in addition to the main transformer, there can be another power supply for standby and IR remote control.

Before doing the voltage conversion, check to make sure there aren't any small control transformer (for standby/IR receiver) somewhere in the Verdi that also need to be converted from 100V to 120V.

This is an example of an Accuphase transport:

 

[vadimgal]

Thank you very much ! I will double check .