Academy Audio Hi-End MUSES VCM Manuel de l'utilisateur - Page 10
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VCM Board 1
J1
CON16
J3
+15V
J4
GND
J5
+15V
C2 47uFx35V NP
J7
IN_L
HOT
C4 47uFx35V NP
J9
IN_L
COLD
J10
COM_L
C6 47uFx35V NP
J13
IN_R
HOT
C8 47uFx35V NP
J15
IN_R
COLD
J16
COM_R
Figure 8. Potentiometer Type Balanced Volume Control Application.
8.
Control Signals
Control signals from any of the dedicated Academy Audio MUSES® controllers may be applied though a
J2 flat cable connector. The connecting cable is provided with the controller board. For balanced
applications, the second VCM board receives control signals from the first board connected to the
controller. J4 connectors of the two VCM board shall have lines GND, LTH, DAT, and CLK connected with
short wires or pins as shown at Figure 5 and Figure 8.
When VCM board is used with a MCU_M board installed on top, no flat connection cable is needed. The
control signals are provided through a receptacle header installed in a J4 position.
9.
Muting Relay
According to the MUSES®72320 volume control chip datasheet, the chip is sensitive to the audio signal
applied to the inputs before the power is supplied. In this case a distorted audio may be fed through the
J2
CON16
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VCM Board 2
OPTIONAL
(SEE TEXT)
R1
MUTE
Q1
2N2222A
6.8K
R2
22K
C1
C3
R3
R4
C5
C7
R5
R6
TO MUTING RELAY
J6
OUT_L
HOT
J8
OUT_L
COLD
J11
COM_L
J12
OUT_R
HOT
J14
OUT_R
COLD
J17
COM_R