EDIROL UA-25 schematic?

[spamunkulus]

I need a schematic for the EDIROL UA-25.
There is a problem in the power supply area.
there is power at the USB connector but not
at the input of the LT1111 converter(IC35).
The board is not easy to trace.

Thanks!

[Jazz P Bass]

Highly doubt that you will 'find' a schematic for that unit.

If the USB jack has power but the LT1111 converter does not, look for a surface mount fuse from the jack to the ic.
It may be open.

LT1111 Step Up.pdf

[spamunkulus]

Highly doubt that you will 'find' a schematic for that unit.

If the USB jack has power but the LT1111 converter does not, look for a surface mount fuse from the jack to the ic.
It may be open.

[ATTACH]38893[/ATTACH]

I dont see a fuse but a P-Mosfet 2SJ325
The gate is not driven. The "on" signal is missing.

My request at ROLAND service did not lead to a schematic.
Is Roland especially uncomfortable in that regard?
. . . .
Digitech sent me immediately a schematic for a dead Whammy 4 Pedal.
That was nice.

[spamunkulus]

Problem solved:

it was a corrupted driver.
The driver must work correctly, otherwise the 2 Fets for the power conversion chips
get no "on" signal. The interface was completely ok though.