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PG13
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17. Install D1, the red LED.
18. Now here comes a really critical install. Install C3, one of the 3300 or
4700uF electrolytic capacitors. PAY CLOSE ATTENTION TO
ORIENTATION! Usually the negative side of the capacitor is indicated with
a stripe and large negative (-) symbols. This is the side that will mount
away from the positive indicator we show on our PC boards. Hook these
babies up the wrong way and you are in for a catastrophic failure!
19. Install C4, the other 3300 or 4700uF electrolytic capacitor. Again pay
close attention to orientation. These large capacitors help “smooth” out the
DC supply to get rid of most of the 60Hz and 120Hz that remains from the
rectification process of D2-D5. These also reduce the hum that would be
present when you draw arcs from the high voltage.
20. Install HS1 into the holes provided. DO NOT SOLDER YET!
21. Take Q1, (marked TIP31C) and push the three leads into the holes
provided for it. Push the part down until the heatsink tab hole of the
transistor lines up with the center hole of HS1.
22. Using one of the 4-40 x 1/4” screws and a 4-40 lock nut, secure the tab
of Q1 to the heatsink. Tighten the screw securely so that the tab of the
transistor is flush to the heatsink.
23. Making sure the heatsink is flush to the board, solder the two tabs of
the heatsink.
24. Solder the three leads of Q1.
25. Install HS2 into the holes provided. DO NOT SOLDER YET!
26. Take Q2, (marked TIP31C) and push the three leads into the holes
provided for it. Push the part down until the heatsink tab hole of the
transistor lines up with the center hole of HS2.
27. Using the other 4-40 x 1/4” screw and a 4-40 lock nut, secure the tab of
Q2 to the heatsink. Tighten the screw securely so that the tab of transistor
is flush to the heatsink.
28. Making sure the heatsink is flush to the board, solder the two tabs of
the heatsink.
29. Solder the three leads of Q2.
30. Install one of the U cores into one side of the transformer.
31. Holding the U core in with a finger, tilt the board up so the U core
installed is facing downward.
32. Install one of the 0.25 mm spacers in each side of the core holes.
These need to be sitting flat against the installed U core so we can install
Содержание PG13
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