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Name And Function Of Switch/Indicator/Etc - Sony BKPF-L752 Maintenance Manual

Audio d/a converter board
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1-3. Name and Function of Switch/Indicator/etc.

1-3. Name and Function of Switch/Indicator/etc.
1
D3
2
D814
3
D815
4
RV101
5
RV201
6
RV301
7
RV401
Switches/gain adjusting VRs (Factory default settings are indicated by a \ \ \ \ \ mark)
No. Ref. No.
Name
8 S3
Setting switch
S3-1
TEST 1
S3-2
TEST 2
S3-3
AES/EBU 1 DE-EMPHASIS
S3-4
AES/EBU 2 DE-EMPHASIS
4 RV405
CH1 GAIN
5 RV406
CH2 GAIN
6 RV407
CH3 GAIN
7 RV408
CH4 GAIN
Indicators
No. Ref. No.
Name
1 D3
POWER ( 12 V)
2 D814
AES/EBU 1 IN
3 D815
AES/EBU 2 IN
1-2 (E)
Main Board (DAC-38 Board: Side A)
Function
ON: Test mode (Factory use)
\ OFF: Normal mode
ON: Test mode (Factory use)
\ OFF: Normal mode
ON: When the de-emphasis is on for the signals input to the AES/EBU IN 1
connector
\ OFF: When the de-emphasis is off for ones
ON: When the de-emphasis is on for the signals input to the AES/EBU IN 2
connector
\ OFF: When the de-emphasis is off for ones
Adjusts the audio output level of the each channel within the range between _14 dB
(_10 dBm output) and +4 dB (+8 dBm output) at _20 dB FS input.
n
At the factory-out, they were adjusted so as to convert a digital audio signal _20 dB
FS into an analog audio signal +4 dBm.
Color
Function
Green/red
Green: A power of 12 V is normal
Red:
A power of 12 V is abnormal
Green/red
Green: When a digital audio signal is input to the AES/EBU IN 1 connector
Red:
When no signal is normally input to the AES/EBU IN 1 connector
(including the case where no signal is input)
Green/red
Green: When a digital audio signal is input to the AES/EBU IN 2 connector
Red:
When no signal is normally input to the AES/EBU IN 2 connector
(including the case where no signal is input)
8
ON
S3
1 2 3 4
BKPF-L752

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