Sony BKPF-L752 Benutzerhandbuch
2-2 (E)
BKPF-L752
2-2. Preparation for Adjustment
1.
Extend the DAC-38 board with a extension board.
2.
Write down the customer settings of the switch (S3) on
the DAC-38 board in following table.
3.
Set the switch S3 as follows:
Ref. No. (Address)
Setting at adj.
Customer setting
S3 (F-1)
No. 1:
OFF
OFF
No. 2:
OFF
OFF
No. 3:
OFF
No. 4:
OFF
4.
Install the main board (ADC-40 board) of the audio
A/D converter board (BKPF-L751’s audio input/
A/D converter board (BKPF-L751’s audio input/
output gain in a factory default condition) to the
interface unit.
interface unit.
Factory default condition (RV405, 406, 407, 408/
ADC-40 board):
ADC-40 board):
Each VR was completed the adjustment so as to
convert a
convert a
+4.0 dBm to _20 dB FS.
5.
Install the connector panel of the audio A/D converter
board (BKPF-L751) to the interface unit after setting
board (BKPF-L751) to the interface unit after setting
the LOOP/WORD switch to WORD CLK OUT (upper
position).
position).
6.
Turn on the power of equipment, and warm up them
for about ten minutes.
for about ten minutes.
2-2. Preparation for Adjustment
2-3. Power Supply Voltage Adjustment
2-3. Power Supply Voltage Adjustment
2-3. Power Supply Voltage Adjustment
Measuring equipment: Digital voltmeter
1.
Set the digital voltmeter as follows:
Range: AUTO
Range: AUTO
Mode: DC V
+
+
+
+
+
5 V adjustment for Analog line
2.
Connect the probe of the digital voltmeter as follows:
+: TP1/DAC-38 (G-2)
_: E7/DAC-38 (C-2)
+: TP1/DAC-38 (G-2)
_: E7/DAC-38 (C-2)
3.
Adjust the voltage on the digital voltmeter.
Adjustment point:
Adjustment point:
1RV1/DAC-38 (G-2)
Specification:
4.75
±
0.05 V dc
+
+
+
+
+
5 V adjustment for Digital line
4.
Connect the probe of the digital voltmeter as follows:
+: TP2/DAC-38 (F-2)
_: E2/DAC-38 (F-2)
+: TP2/DAC-38 (F-2)
_: E2/DAC-38 (F-2)
5.
Adjust the voltage.
Adjustment point:
Adjustment point:
1RV2/DAC-38 (F-2)
Specification:
4.75
±
0.05 V dc
±
12 V adjustment
6.
Connect the probe of the digital voltmeter as follows:
+: TP3/DAC-38 (D-3)
_: TP4/DAC-38 (D-3)
+: TP3/DAC-38 (D-3)
_: TP4/DAC-38 (D-3)
7.
Adjust the voltage.
Adjustment point:
Adjustment point:
1RV3/DAC-38 (E-2)
Specification:
+25.10
±
0.05 V dc
8.
Connect the probe of the digital voltmeter as follows:
+: TP3/DAC-38 (D-3)
_: E7/DAC-38 (C-2)
+: TP3/DAC-38 (D-3)
_: E7/DAC-38 (C-2)
9.
Check the voltage.
Specification:
Specification:
+12.55
±
0.15 V dc
10. Connect the probe of the digital voltmeter as follows:
+: E7/DAC-38 (C-2)
_: TP4/DAC-38 (D-3)
_: TP4/DAC-38 (D-3)
11. Check the voltage.
Specification:
_12.55
±
0.15 V dc
n
After adjusting the power supply voltage, be sure to
After adjusting the power supply voltage, be sure to
perform “2-4. Input/Output Gain Adjustment”.
DAC-38 Board (Side A)
S3
ON
1 2 3 4
E3
E6
E8
E1
E2
TP1
TP2
RV1
1
RV2
1
RV3
1
D3
D814
D815
D815
RV101
RV201
RV301
RV401
E4
E7
TP4
TP3