Firmware file for Marantz NR1501 needed

[Daniel Larsson]

Hi all,

I picked up a Marantz NR1501 that the seller said did not produce any audio, but was starting up just like normal. This was indeed the case and the hunt for damaged components started.
After confirming all voltages and replacing all caps on this godforsaken HDMI-board I finally got sound from the AUX input, but all digital inputs are still dead.

The service menu shows no DSP version so I desoldered IC1604 that should have the serial flash DSP firmware on it and made two dumps that turned out identical.
The content of these seems to be useless as far as I can tell and I would like to flash the chip with a proper firmware to see if that fixes the issue, or at least compare what I have to a proper one from a unit that works.

Hoping someone has a firmware file and can share it as I am out of options here and this seems to be the issue 😊

(attaching my two reads if that is of interest for anyone)

Regards,
Daniel

[dobrykamil]

Also, replace C1604 if you haven't done it yet.

[dobrykamil]

Also, replace C1604 if you haven't done it yet.

[Daniel Larsson]

Also, replace C1604 if you haven't done it yet.

Thank you soooo much, you are a life saver!
Will flash the IC first thing tomorrow and report back.

C1604 including all other 30 something electrolytic capacitors are replaced.

[Daniel Larsson]

Flashed the new firmware to IC1604, resoldered it and it works perfect!

Service menu finally shows DSP version and HDMI audio from PS5 works flawless.

Again, a huge thanks for providing the firmware.

[dobrykamil]

Flashed the new firmware to IC1604, resoldered it and it works perfect!

Service menu finally shows DSP version and HDMI audio from PS5 works flawless.

Again, a huge thanks for providing the firmware.

Happy days! I'm glad I could help.