Help interpreting Philips / Sharp chassis marks, year of production

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dubout

Member (SA)
I have found this pretty cool boombox with built in black/white TV from Philips. When cleaning and rebelting it, I made two interesting discoveries. First, it is completely made by Sharp! There are Logos on the boards and on the speakers. Leading to my first question: Is there a Sharp equivalent to this box? I have looked at different pictures, the closest are the Sharp 5P-37 or the Tri-Mate 5000 but they don't really fit with the buttons and knobs on top and all. Just curious.

The second discovery were the markings inside the chassis with the production year, see picture. But I can't really figure out the year, only that it was produced in October. Anybody knows what these markings mean? I really would like to know when this one was made. I hate to have it right infront of me and not being able to interpret it correctly. The service manual floating around on the internet is from August 1981 by the way.

Bildschirmfoto 2023-11-06 um 12.58.54.jpgBildschirmfoto 2023-11-06 um 12.59.02.jpgBildschirmfoto 2023-11-06 um 12.59.06.jpgBildschirmfoto 2023-11-06 um 12.59.jpg
 

dubout

Member (SA)
I'm guessing that the 3rd and 4th digits are the day, 25.

Is that screen 4K?

Good lead! And yes, it's 4k via HDMI, in b/w :angelic:

So the 1st digit is the month: 10
3rd and 4th digit the day which makes absolute sense: 25
Then second digit should be the year of which they only need the last number, the factory should know in which decade they produced it: 9 as in 1979.
= 25.10.1979.

The last digit could be anything, my guess is it's related to the production process or a revision but who knows.

Good hint with the ICs, I will look next time I open it. And yes, it's the Art 60. So that would fit to the catalogue Reli posted from Spring 1980. Produced in the end of 1979, marketed Spring 1980. That makes sense to me, thank you all!
 
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