BF-22 SALLEN KEY FILTER V3.3 - ASSEMBLY GUIDE – REV. NOV 17
CONTROL PCB
OPEN CONTROL BOARD BAG A
RESISTORS
Qty Valu
e
Code
Name on PCB
16
100k Brown, black, black, orange, brown
R104, R105, R108, R109, R110, R111,
R112, R113, R114, R115, R122, R123,
R126, R127, R132, R133
8
10k
Brown, black, black, red, brown
R117, R118, R120, R121, R124, R125,
R128, R129
4
1k
Brown, black, black, brown, brown
R100, R101, R102, R103
2
15k
Brown, green, black, red, brown
R116, R119
2
43k
Yellow, orange, black, red, brown
R106, R107
2
47k
Yellow, purple, black, red, brown
R130, R131
DIODES
Solder the diodes
observing their polarity
. The black or white line on the diode (which
indicates the cathode – the negative side) must match the white line on the diode symbol on
the PCB silkscreen.
Qty Value
Name on PCB
2
1N4148
D1, D2
ICs
First
place the sockets
(taking care to orientate them properly – the notch or dot on one
end of the IC should match the image on the silkscreen) and solder them into their correct
positions.
Next place the ICs in their respective sockets (again taking note of their orientation – the
notch or dot on the top of the IC must match that of the socket and silkscreen).
Qty Value
Name on PCB
2
TL074P
IC100, IC101
4
