Hey all,
when measureing (9.22v) at tip, i get some weird voltages, i'll just write the weird ones.
(I have only a 5k6 instead of a 5k1 on R5)
(1uf film capacitors)
(1n4004 instead of 1n4001)
(using ICL7660SCPA charge pump)
IC1:
1 5.83
2 5.86
Ic2:
4 Positive voltage
8 8.81v
Ic3:
pins 4 and 5, positive voltages
I'm writing these from the top of my head, but that was weird to me when testing.
I'll write down later the weird ones for sure.
I suspect C17 as a faulty capacitor, could that be the case ?
For the 1uf capacitors i'm using all film, so they are bipolar, no real difference with the + and - there.
zener diode is in the right direction.
also 1n4004 diodes are in the right direction.
same with the 1n34a diodes.
all ics are in the right direction also.
I will up pics later.
What version of the board? Your own etching, or a bean? Single-sided/double-sided?
Pics should help. And please list voltage readings for all pins, not just the weird ones.
bean board
ic1:
5.90
5.90
2.65
0
9.12
8.50
5.89
5.92
ic2:
5.71
6.07
5.88
6.39
7.85
7.15
5.93
5.88
ic3:
9.12
9.12
0
6.40
9.12
8.52
8.25
6.40
The charge pump appears to be malfunctioning or something is making it not operate correctly.
this is funny and odd
i've had 3 BAD charge pumps, all from different sources.
4th ones a charm i guess.
i didn't think it was the cause cause i replaced between them 3 times.
ERRR
annoying :(