macplaxton
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Hi all,
I'm trying to fix the power supply on my 400s. It is a DG-50 REV A 2005-11-17.
Can anyone tell me the value of R28(?) and the voltage of zener ZD3?
IMG_20180830_155159 by macplaxton, on Flickr
Also, after removing ZD4 from the board to read the numbers, I noticed it was installed in reverse to the printing on the board. Anyway, I've check the capacitors and C71 and C23 were bad and I've replaced a few others as a precaution as I had spares.
IMG_20180814_145417_1CS by macplaxton, on Flickr
Relook 400s power to VFD filaments by macplaxton, on Flickr
It seems that pins 1 and 2 of the 15-way connector and +FL and -FL for the vacuum fluorescent display filaments.
Thank you.
I'm trying to fix the power supply on my 400s. It is a DG-50 REV A 2005-11-17.
Can anyone tell me the value of R28(?) and the voltage of zener ZD3?
IMG_20180830_155159 by macplaxton, on Flickr
Also, after removing ZD4 from the board to read the numbers, I noticed it was installed in reverse to the printing on the board. Anyway, I've check the capacitors and C71 and C23 were bad and I've replaced a few others as a precaution as I had spares.
IMG_20180814_145417_1CS by macplaxton, on Flickr
Relook 400s power to VFD filaments by macplaxton, on Flickr
It seems that pins 1 and 2 of the 15-way connector and +FL and -FL for the vacuum fluorescent display filaments.
Thank you.