Reading the date codes on plastic mouldings

Does this seem likely - a centre pop dimple in the mould above

82 in 1982 and then another over 83 in 1983. Leading to raised small conical pips on the plastic. >

It sounds like the mold was first used in 1982, and still in use in

1983. they just drill a dimple in the mold every time it increments rather than changing a stamped plate on the mold, like the early days when you saw the screw heads and outlines of the plates.

--
Former professional electron wrangler.

Michael A. Terrell
Central Florida

etc.

I was looking at a Samsung combo TV / VCR today. IC date codes suggested 2003 IC manufacture. On the ps and TV EHT board was a white silkscreen printed panel presumably with date coding. Can anyone decode this one ? A left panel and right panel consisting of

1 to 6 along top and 5 dots in each column so 6 X 5 Right panel marked 7 to 12 and similar array of dots but the third one down under the 7 was missing. So I assume third week of 5 weeks of July. Central panel had marked on top of one another 02 ?? ?? 05 The queries were probably the remnant tops of numbers from scrubbed out 03 and 04 so i assume like in the plastic case 03 is scrubbed in 2003 and 04 scrubbed in 2004 but still leaving the 03 mark. So my guess being the screen printing date of mid July 2004

Then another small central panel marked J XXK XXXJ XXX An X representing a white dot and no dot in row 1 , col 1 and K J letters printed. I've no ideas about that

Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on