Audio Level Adjustment - Sony BVS-A3232 Maintenance Manual

4-3-2. Audio Level Adjustment

Equipment Required
• Audio signal generator: Sony Tektronix SG505 or equivalent
• Audio-level meter: Sony Tektronix AA501A (Audio analyzer) or equivalent
• Extension board (EX-351, Sony part No. : J-6185-310-A)
Setting Before Adjustment
• Setting the audio signal generator
1. Set the audio signal generator as follows:
Output impedance ........ 600 Ω
FLOATING/GND ........ FLOATING
Frequency ..................... 1 kHz
2. Connect an audio signal generator.
3. Set the output level of an audio signal generator to +4 dBm (1.228 V).
Audio signal generator
OUTPUT
CT
• Setting Input and Output Channels
All output channels must select the same input (IN 1) then adjust each output channel.
Connect a remote control unit, control terminal and peripheral devices. Set all channels so that the IN 1
feeds the OUT of all channels. (Refer to the supplied installation manual for software.)
Audio signal generator
+
OUTPUT
–
CT
BVS-A3232
Audio-level meter
+ +
– –
600Ω
GND
INPUT
connector
INPUT
BVS-A3232
IN 1 OUT 1
OUT 2
OUTPUT
·
connector
·
·
4-3. MX-82 Board
Audio-level meter
+
INPUT
–
600Ω
GND
4-7(E)