Rcf 4pro 8003 as

[Sakor]

Hi,
Urgently needed schematic diagram (service manual) for RCF 4PRO 8003 AS monitor speaker.
Thanks in advance and Best regards.
Alex

[doctor]

Hi,
Urgently needed schematic diagram (service manual) for RCF 4PRO 8003 AS monitor speaker.
Thanks in advance and Best regards.
Alex

4PRO 8003-AS active subwoofer contains DIGIPRO 1000 module
(power amp and power supply) manufactured by DB Technologies.

Schematics of this module are DB Technologies proprietary information,
and manufacturer refuses to distribute it even to authorized distributors.

The only way to fix this device is a board replacement.

[paleeman]

Hi.
I have some experience with these modules, I've repaired dozens of them with 100% success. Unfortunately, no schematics are available for this product, but every single component is available at various shops. (except, of course, the pre-programmed microcontroller)

[paleeman]

Check this out....

[adrianpintea2022]

Hello did you managed to repair the input board or to find a schematic? I have a problem with one board. It oscillates in the speaker with no signal and when I touch one of the 3 buttons it makes a "boom" in the speaker. I changed all the ICs MC33079 and nothing changed.

[sugeda]

https://music-electronics-forum.com/...b-technologies

[adrianpintea2022]

Sorry but I don't have a problem on the amp PCB. I tested with another input and it works fine. The schematic from DIGIPRO 1000 does not include the schematic of the input board....