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1-4. Name and Function of Switch/Indicator/etc.
1-4. Name and Function of Switch/Indicator/etc.
1
COR2
2
RV4
3
D1
COR3
4
COR1
5
RV3
Switches/shorting plugs (Factory default settings are indicated by a \ \ \ \ \ mark)
No. Ref. No. Name
7 S1
AUDIO 1 600 Z
8 S2
AUDIO 2 600 Z
4 COR1
AUDIO 2 GAIN
1 COR2
AUDIO 1 GAIN
6 COR3
MONAURAL/STEREO Selects monaural or stereo mode of the analog audio signal input/output.
Indicator
No. Ref. No. Name
3 D1
POWER
Gain adjusting VR
No. Ref. No. Name
5 RV3
AUDIO 2 FINE VR
2 RV4
AUDIO 1 FINE VR
n
At the factory-out, the gain adjusting VRs were adjusted to 0 dB. (the standard level +4 dBm)
1-2 (E)
6
7
8
S1
S2
MO
ST
Main Board (ADA-55 Board: Side A)
Function
Selects the input impedance of the signal input to the AUDIO 1 connector.
OFF:
20 kZ
\ ON:
600 Z
Selects the input impedance of the signal input to the AUDIO 2 connector.
OFF: 20 kZ
\ ON:
600 Z
Selects an input/output gain of the signal input to the AUDIO 2 connector.
(Valid only when COR3 is set to ST.)
+8 dB
+4 dB
Selects an input/output gain of the signal input to the AUDIO 1 connector.
+8 dB
+4 dB
MO (Monaural): The signal input to the AUDIO 1 connector is distributed to eight outputs
\ ST (Stereo):
The each signal input to the AUDIO 1 and AUDIO 2 connectors is distributed to
four outputs
Color
Function
Green/red
Green: A power supply of 12 V is normal
Red:
A power supply of 12 V is abnormal
Function
Adjusts the gain of the signal input to AUDIO 2 connector within the 2 dB range.
Adjusts the gain of the signal input to AUDIO 1 connector within the 2 dB range.
\0 dB
_4 dB
\0 dB
_4 dB
_8 dB
_8 dB
BKPF-L753A
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