grundig: Satellit 500 version setup

20-Sept-2022: I have updated this article, following my acquisition of a Sat 500 unit.

According to the service manual with P/N 72010-711.31 - Printed in Germany 1189, the design uses a set of diode bridges to set between the International, Professional and Italian versions.

Where Bridge = 1 means diode installed

The above table was created based on the Service Manual P/N 72010-711.31 mentioned before, where the Receiver PCB having the Diodes Bridges shows the P/N 19352-434.01/4B(02).

It seems that later productions of this radio model uses updated versions of the Hardware and Firmware, where the Diode Bridges setup can be different from the original production.

This is the case with my radio unit, a INT version, using a Receiver PCB with a later P/N 19352-434.01/2L(05) revision.

Here the INT version uses the setup:  B3 = 1, B2 = 1, B1 = 1, B0 = 0, so the bridge B2 (D508) setup is set differently from the original setup listed above.

I confirmed this setup change in my radio unit, by entering the Testmode mode, and saw the Version = INT and the diodes bridges setup = 1110.

After opening the radio to inspect the PCB, I saw that all four diodes are installed, but the diode D506 (bridge B0) was cut at the cathode leg. 

 

According to the service manual, the Test Mode also shows the current Bridge Diodes setup corresponding to the model version. To invoke the Test Mode, turn off the radio, type in the code 050251, press STORE to see the version, then press STORE again to see the Diodes Bridges.

 

 

 

 

 

 

Later Receiver PCB version p/n 19352-434.01/4B(03) P-19352-147.94  19352-434.01/3L)05), some components dated as of 1991, using 3-Lamp (2-lamp on LCD display, 1-Lamp on Keyboard), where the Testmode shows version = INT and the diodes bridges setup = 1110.

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