After the alteration of the indication characteristics a new adjustment of the offset is necessary, if e.g.
the
lowest
LED in the
bargraph meter is not off without input signal.
4.2
Offset adjustment of the bargraph meter
The DC voltage must be minimized with the offset trimmer of the according IC without input signal (measure with
multimeter!): below +I- 5mV.
Indication
PCB
IC Pin Offset trimmer
Average Peak
Master Left 821 90182206
114
7
14 R234
Master Right 821 91
114
7
14 R234
Master
B
821 92 11 4
7
14 R234
5.
Aux OUTput without MIC signals
If the AUX OUT is to be used for monitoring the music and the DJ switches the MIC signal to Master BIAUX OUT
(Master B
=
other rooms) feedback can occur.
For this case the MIC signal can be disconnected from the AUX OUT signal internally.
For this purpose the code jumper on the 3-pole plug connector
J1 on pcb 82192 adjacent to VR3 must be altered
into the dashed position!
6.
Alteration of the MONO OUTPUT to SUB OUTPUT
-
Activation of the integrated low-pass filter
After the coding has been altered, the MONO OUTPUT only delivers
signals with frequencies below 100 Hz which makes
subwwfer operation easy.
The two coding jumpers of the 3-way plug connectors J2 and J3
(*)
at the pcb 82191 (Master A right) must
be
changed (to the non- marked position).
*)
Near bus connector CN1
To Next Page
Loading...
