Vectronics VEC-422K - Manual (Page 13)

VEC-422K Owner's Manual SCA Decoder Kit
11
Locate the three 100K-ohm resistors (brown-black-yellow). Install and solder at
the following locations:
! ! 13."R2 100K-ohm resistor (brown-black-yellow)
! ! 14. R7 100K-ohm resistor (brown-black-yellow)
! ! 15. R9 100K-ohm resistor (brown-black-yellow)
Non-polarized capacitor installation:
Important Note: Monolithic capacitors have superior radio-frequency operating
characteristics, but the lead welds may fail if the device is over-stressed during
installation or removal. For this reason, never use force to seat a monolithic cap
into the PC board. If the spacing isn’t right, pre-form the leads to the correct
spacing before inserting into the board.
Incorrect
Ooops! Correct
Locate the two 120-pF monolithic capacitors (121). Install and solder at the
following locations:
! ! 1."C2 120-pF monolithic capacitor (121)
! ! 2."C9 120-pF monolithic capacitor (121)
! ! 3."Locate the 470-pF monolithic capacitor (471), install and solder at C1.
Locate the three .001-uF monolithic capacitors (102). Install and solder at the
following locations:
! ! 4."C6 .001-uF monolithic capacitor (102)
! ! 5."C10 .001-uF monolithic capacitor (102)
! ! 6."C12 .001-uF monolithic capacitor (102)
! ! 7."Locate the .0022-uF monolithic capacitor (222). Install and solder at
C11.
! ! 8."Locate the .0047-uF monolithic capacitor (472). Install and solder at
C4.
Locate the two .01-uF monolithic capacitors (103 or .01). Install and solder at
the following locations:
! ! 9."C3 .01-uF monolithic capacitor (103 or .01)