Sony BKPF-L753A - Manual (Page 12)

2-2 (E)
BKPF-L753A
2-2. Preparation of Adjustment
2-3. Input/Output Gain Adjustment
2-3. Input/Output Gain Adjustment
Measuring equipment: Audio level meter
1. Set the output of the generator to +4.0 dBm, 1 kHz.
(0 dBm = 0.775 Vrms)
CH1 adjustment
2. Connect the audio signal generator to the input of CH1
connector.
3. Connect the audio level meter to one output of CH1
connector.
4. Check that COR2 (A-1) is set to 0 dB.
If not, set it to 0 dB.
5. Adjust the CH1 output level on the audio level meter.
Adjustment point:
1RV4/ADA-55 (A-2)
Specification: 4.0
±
0.1 dBm (at 600 Z load)
CH2 adjustment
6. Connect the audio signal generator to the input of CH2
connector.
7. Connect the audio level meter to one output of CH2
connector.
8. Check that COR1 (A-3) is set to 0 dB.
If not, set it to 0 dB.
9. Adjust the CH2 output level on the audio level meter.
Adjustment point: 1RV3/ADA-55 (A-3)
Specification: 4.0
±
0.1 dBm (at 600 Z load)
S1
S2
COR2
COR1
MO
RV4
RV3
D1
RV1
RV2
COR3
S T
+
8
+
4
0 _
4
_
8
+
8
+
4
0 _
4
_
8
1
1
ADA-55 Board (Side A)
2-2. Preparation of Adjustment
1. Extend the ADA-55 board with a extension board.
2. Write the customer settings of the shorting plugs
(COR1, COR2, and COR3) and switches (S1, and S2)
on the ADA-55 board down in following table.
3. Set their shorting plugs and switches as follows:
Ref. No. (Address) Setting at adj. Customer setting
COR1 (A-3) 0 dB
COR2 (A-1) 0 dB
COR3 (C-2) ST (STEREO)
S1 (D-1) ON (600 Z )
S2 (D-2) ON (600 Z )
4. Turn on the power of equipment (the signal generator,
audio level meter, and interface unit PFV-L1 or
PFV-L10), and warm up them for about ten minutes.
5. Attach the 600 Z resister for termination to the audio
level meter.