Velleman K4020 Mode D'emploi page 34

properly connected. If this is not the case, the amplifiers may be destroyed!
- Connect the red speaker terminal to the terminal +LS of amplifier "A".
- Connect the black speaker terminal to terminal +LS of amplifier "B".
Temporarily secure the back panel using four m4 bolts.
3) Wiring the power supply for the amplifiers (Fig. 4.1):
- Connect the red, yellow, grey and blue wires of the 2 x 30V transformer at
the back to the corresponding RED (red), YEL. (yellow), GR. (grey) and BL.
(blue) terminals of connector J1 of the right hand amplifier.
- Connect the other transformer in the same way to the left hand amplifier.
4) Wiring of the mains connection (Fig. 8.2):
NOTE: All connections must be made using 0.5mm wire.
- Connect one connection of the primary winding of the transformer at the
back to a terminal of the right hand fuse holder.
- Connect one connection of the primary winding of the transformer at the
front to a terminal of the left hand fuse holder.
- Connect the other primary windings of both transformers to the right hand
terminal of the mains connector.
- Insert a jumper between both free terminals of the left and right hand fuse
holder and also connect this jumper to the terminal of the mains switch (use
a cable lug on the mains switch!).
- Connect the other terminal of the mains switch to the left hand terminal of
the mains connector.
TEST AND CONNECTION
1) Stereo use:
- Connect a speaker (min. 4 ohms) between the +LS and -LS terminals of the
left and right hand amplifiers.
- Connect the input of the amplifiers to the output of the pre-amplifier or
another signal source capable of providing at least 1V RMS.
- Now the amplifier may be switched on and tested with music.
2) Mono use (bridged):
- Connect a speaker (min. 8 ohms) between the +LS and -LS terminals.
- The input signal should be connected to the input of amplifier "A" (normally,
this is the right hand amplifier in which the cinch connector has been
mounted).
- Now the amplifier may be switched on and tested with music.
Finally, the lid is inserted by first removing the back panel. (see fig. 7.1)
NOTE: Even without any music signal the amplifier will become relatively hot (±
60 ° C). This is normal.
H4020-ED2-34