Vectronics VEC-1120K - Manual (Page 22)

VEC-1120K/1130K/1140K/1180K Instruction Manual
20
threads. Immediately screw shafts together until snug and allow glue
to set. (Do not over-tighten or threaded portion of the shaft extension
will break!)
Important Note: To perform alignment and tests, you will need knobs on the
control shafts for the tuning capacitor and gain control. These knobs are not
included in your direct conversion receiver kit. However, Vectronics makes a
customized enclosure for your kit (VEC-1100KC), which includes knobs.
! ! 22. Install knobs on the shafts of the Gain control R1 and Tuning capacitor
C19.
! ! 23. Set tuning capacitor C19 fully clockwise, and tighten the knob set
screw with the knob indicator at the 9 o’clock position.
! ! 24. Set the gain control fully counter clockwise, and tighten the knob set
screw with the knob indicator at the 7 o’clock position.
Your kit is finished, and it’s time to take a well-earned break! When you come
back, be sure to give your work a close “quality control” (QC) inspection before
moving on.
QC Inspection:
! ! 1. All board locations should have components installed.
Note: capacitor C4 is only used in the VEC-1120.
! ! 2. Check all solder connections, looking for unwanted solder bridges or
solder “splashes”. Shine a bright light on the solder-side of the PC
board, and keep a sharp eye for dull or poorly flowed solder joints. If
the solder has adhered to the component leads, it will form a shiny
“cone”; a “donut” like solder connection may indicate a poor
connection.
! ! 3. Resolder solder joints that look suspect.
! ! 4. Watch for parts installed in the wrong spot! These errors must be
corrected before attempting to align or use the kit.
Now that assembly and inspection is completed, you’re ready to begin the testing
and alignment phase of construction.