Velleman K7200, Manual, Page: 30 / 54

H7200-ED2-30
Also connect the mains voltage wires of the ring core transformer (for the colours
please check the box of the transformer) see figure 6.2.
The connections for the fan should remain open for the time being.
Mount the front panel on the cooling profiles for the time being by means of the
black zinc-plated M4 bolts.
Make the following connections with the toroidal transformer: (figure 6.2):
- Connect the 15V clamp (marked GREY) with the 15V connection or grey wire
of the transformer.
- Connect the 0V clamp (marked BLUE) with the 0V connection or blue wire of
the transformer.
- Connect the 0V clamp (marked YELLOW) with the 0V connection or yellow
wire of the transformer.
- Connect the 15V clamp (marked RED) with the 15V connection or red wire of
the transformer.
TESTING
Place a 220V/25W or 40W lamp over the fuse holder of the power supply. The
fuse must NOT be mounted yet.
- Turn the trimming potentiometers RV1 and RV2 (on the base board) in the
intermediate position.
- Turn the trimming potentiometers of the digital readouts (METER ADJUST)
completely to the right.
- Turn the current (current potentiometer) on maximum.
- Connect the mains with the mains plug and switch the power supply on. If
everything functions properly, the lamp should light for only a second or not at
all; if the lamp keeps lighting however, then the power supply should be switched
off and the wiring checked.
- The digital readout should now light up.
- Connect a voltmeter to the output terminals and check whether the output
voltage is adjustable between 0 and 30V. Around approximately 12V one
should hear the relay excitation.
- Switch off the power supply (remove mains plug as well).
- Connect the right transistor board connections E, B and C with the
corresponding connections of the base board by means of pieces of white, blue
and red wire. (do not forget the cable shoes) (see figure 7.0).
- Make an interconnection from one transistor board to the other.
(see figure 7.0).
- Switch the power supply back on (the lamp can now light up as well) and check
whether the output voltage is adjustable between 0 and 30V.
- Remove the mains voltage and also remove the lamp connections of the fuse
holder. Mount a 4A inert fuse in the fuse holder.
- The line voltage of the fan can now be connected. (see figure 6.2).