Velleman K7200, Manual

Page: 29 / 54

H7200-ED2-29
front panel.
- Now the adhesive tape and the protective film on the other side and adhere this
side also on to the front panel.
- Mount the +(red) and -(black) connection terminals.
- Mount the power switch.
- Mount the base board and the digital readout on the front panel as shown in
figure 5.0.
Assemble the buttons on the potentiometers:
(for small buttons the potentiometer axes may have to be shortened)
- Small button with red cap for current limitation (CURRENT
LIMIT)
- Large button with blue cap for coarse (COARSE) voltage regulation.
- Small button with blue cap for fine (FINE) voltage regulation.
WIRING
- Connect the points VS, COM and CS (see board annotation in manual) of the
readout by means of wire (thin additionally supplied pieces of wire of 0.5mm) of
about 10cm with the corresponding point on the power supply board. (figure 6.0)
- Connect the two free clamps of the rectifier with the clamps AC of the base
board (use two pieces of white wire). (figure 4.2)
- Connect the + clamp of one of the smoothing elcos (clamp 1) with the + clamp
(next to the AC clamps) of the base board (use a piece of red wire). (figure 4.2)
- Connect the - clamp of one of the smoothing elcos (clamp 5) with the - clamp
(next to the AC clamps) of the base board (use a piece of blue wire). (figure 4.2)
- Connect the red output terminal with the OUT + screw clamp (red wire) and the
black output terminal with the OUT - screw clamp (blue wire) (figure 6.2)
- The connection with the transistor boards should remain open for the time
being.
- Connect with the thin wires the points VA, Gm and GB of the readout with the
2X6V transformer, Gm reaches the middle contact (0) of the transformer, VA and
VB reach the two 6V clamps (figure 6.1).
Assembling the toroidal transformer (2X15V 300VA) see figure 4.0:
-Put a rubber mat on the bottom plate and position the transformer on it. Put a
rubber mat on the transformer and then the metal fixing plate; then fix all parts
with bolt and nut.
- Connect the power plug, the fuse holder and the power switch (use cable
shoes for connecting the power switch!) as shown in figure 6.2.Connect the
small 2X6V transformer (between 0 and 125V or between 0 and 220V
depending on the mains voltage) see figure 6.2.