Does the MDAC's internal PSU PCB upgrade replace the need/benefit of the MPAX or would it still be required to provide additional improvement or would you gain all the benefit by just fitting the MPAX, when it becomes available?
The Upgrade PSU card in the MPAX can only be use with the MPAX as its a five input / output Current to voltage converter.
What is involved with replacing/upgrading the internal PSU PCB for somebody who is reasonably competent.
1. Removing the 8 screws holding the Front and Rear panels of the MDAC together. (on some units these are so tight it can take significant time to remove them - one unit I recently worked on damaged 4 Torx tool bits!!!)
2. Partially remove front panel, unplugging the Flex Foil cable to the front panel. Once unplugged fulry remove front panel.
3. Slide-out Main PCB / PSU PCB with Rear panel (sliding out rearwards). As you slide out the PCB's, note how they are held within "Grooves" in the MDAC extrusion, when reassembling you will need to insure that both the Mainboard and PSU PCB slide back, held within these "Grooves / rails"...
4. Undo the two screws holding the PSU PCB to the rear panel.
5. Unplug the power connector from the PSU PCB to the Mainboard PCB
6. Remove power switch cap (Black or silver) from original PSU PCB and fit to the new upgrade PSU PCB
7. Reassemble the MDAC in reverse order, but fitting the replacement PSU PCB. (Do not forget to reconnect the power connector cable from PSU board to Mainboard + front Panel flex-foil cables).
8. Upload the new software to the MDAC via USB...
Can the Mainboard performance tweak only be done if the MDAC is sent to Czech Rep?
Yes the Mainboard upgrades can only be performed in Czech Rep. as we have to replace SMD components, carefully add Wiring modifications and test on an FFT analyser.
What is the cost for the DIY option (if possible/practicable) or for sending back to the Czech Rep for you to do in-house?
No Discount for the MPAX package - but you save on the cost of shipping. The Mainboard upgrades are extra - I'm thinking GBP199 without the MPAX, GBP 100 extra with the MPAX... Lets see what JTC and SQ think about the performance of the Mainboard upgrade without MPAX) - figures will be crossed here!...
What would be the position with the remaining warranty?
We take on the warranty obligations for the MDAC "package"
John