Klaas Robers wrote:I should make a photograph of the disturbed picture as it is now, just for reference.
Steve Anderson wrote:Progress indeed. 6 out of 16 chips defective is an unusually high percentage, and grouped together in generally one area of the array. The hard part may be getting replacements.
I've downloaded the datasheet for them, they're unusual in that they're in 22-pin DIP packages - I've never come across 22-pin devices before. 20-pin, yes, 24-pin, yes, but never 22.
Correct, the 411s invert the data, you write a 1, a 0 comes out...odd again (See datasheet).
Steve A.
Steve Anderson wrote:Yes, I might be too, if it were not for the fact they don't ship to Thailand. It says. "No power to unit." Probably just needs the rear breaker pushing in, or something simple in the power supply. What all that 'stuff' is on the left-hand side of the front panel is...anyone's guess. It also is a 115V/60Hz unit, possibly plugged into 240V. This could have also fried many of the chips as well as the PSU.
So not only would the PSU need fixing in addition to fried semi's but conversion to 240V/50Hz and EU standard SSTV. You really want to (need to) have one to accept one in this potentially bad condition. If I were to buy it and if I could fix it I would make it switchable between EU and US line/frame rates and 120/128 lines (if possible).
I think I would wait until a better example came along, i.e. I would pass on this one...even at their asking price...
Steve A.
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