Wersi CD 600, Инструкция по сборке

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AM 320-01-808
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9. EF 40 (Effects and Routing)
On this board the 5 slave channels Bright, Mellow,
WV 1, WV 2 and VCF are collected and amplified.
The Mellow-channel (Bright off) is routed directly
via IC 5 to the two summing OPAMPs (IC 9) after
cutting off its higher frequencies. Nearly the same is
done with the Bright-channel; however, the cut-off
frequency of this lowpass filter (IC 4) is higher than
the one of the Mellow-channel. Also, the Mellow-
channeI is distributed evenly to the left (Organ 1) and
the right (Organ 2) channels via R 56 and R 57, while
the Bright-channel is louder on the right channel than
the left one via R SB and R 62.
The two Wersivoice stages are identical:
By two switches in the input stage the WV channel
can be switched to Bright. If desired, you can add
some noise with T 3 and IC 12 (or T 4 and IC 11
respectively); the envelope of the noise is determined
by the control voltages VOLPW1 or VOLPW2.
In the case of WV1, the VCF signal may also be
added via R 14/C 69.
With the switch (IC B and IC 7) following the
OPAMP
(IC 3 and IC 2) the WV signal can be routed to an external
Leslie (W1 -LES, W2-LES) or the PC Board WV 30.
The output signal of the Wersivoice which is present at pin
C 4 or pin C 5 of plug PL 1 is routed individually to the
organ channels left and right with the switches IC 13 or IC
14.
The VCF channel from the slaves can be switched with
Bright on or off via analog switch IC 6 by control VCF/BR.
It can also be switched via IC 6 by DISTON to the
distortion stage IC 15, or directly to the VCF module (IC
17) via IC 1 and C 1. When the latter is the case, noise can
also be added by IC 10 via T 1.
The quality and frequency of the VCF IC SSM 2045
(IC 17) is adjusted with the control voltages VCF/F and
VCF/Q.
The VCF is equipped with a 2-pole filter and a 4-pole filter
output, which can be selected with switch IC 18.
Then you have the possibility of routing the VCF signal to
the channel switch IC 20 or to WV 1; IC 20 will split up
the signal for the left and right organ channels.