Sony BKPF-L752, Maintenance Manual

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1-2 (E)
BKPF-L752
D3
S3
ON
D814
D815
RV101
RV201
RV301
RV401
3
2
1
4
5
6
7
8
1 2 3 4
1-3. Name and Function of Switch/Indicator/etc.
Main Board (DAC-38 Board: Side A)
Switches/gain adjusting VRs (Factory default settings are indicated by a \ \
\ \ \
mark)
No. Ref. No. Name Function
8
S3 Setting switch
S3-1 TEST 1 ON: Test mode (Factory use)
\
OFF: Normal mode
S3-2 TEST 2 ON: Test mode (Factory use)
\ OFF: Normal mode
S3-3 AES/EBU 1 DE-EMPHASIS 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
S3-4 AES/EBU 2 DE-EMPHASIS 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
4
RV405 CH1 GAIN Adjusts the audio output level of the each channel within the range between _ 14 dB
5
RV406 CH2 GAIN ( _ 10 dBm output) and + 4 dB ( + 8 dBm output) at _ 20 dB FS input.
6
RV407 CH3 GAIN n
7
RV408 CH4 GAIN 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.
Indicators
No. Ref. No. Name Color Function
1
D3 POWER (
±
12 V) Green/red Green: A power of
±
12 V is normal
Red: A power of
±
12 V is abnormal
2
D814 AES/EBU 1 IN 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)
3
D815 AES/EBU 2 IN 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)
1-3. Name and Function of Switch/Indicator/etc.