Sony CCU-D50 Service Manual page 43

2-6. SIDE TONE Adjustment
Equipment : Oscilloscope
Audio signal generator
Cord with plug (Sony part No. : 1-557-039-00)
Connection
CCU-D50/D50P front panel
Ele l ca 0000 0088/0
INTERCOM connector
Cord with plug (Sony part No. 1-557-039-00)
Red
Audio signal
Input GND generator
(1 kHz Sine wave)
Green
Oscilloscope
Output GND
* INTERCOM volume knob (on the front panel)
Mechanical center
* Input the following signal from the audio frequency
signal generator.
Signal :
Frequency: 1 kHz
Preparations
Sine wave
CCU-D50/D50P SMV1E
2-6. SIDE TONE Adjustment
Adjustment Procedures
1.
2. Test Point :
Turn @RV1001/PR-270/270A board fully counter-
clockwise (9), and adjust the output control of the
audio signal generator so that the output level "A" of
the INTERCOM connector becomes 1 V p-p.
(Oscilloscope)
INTERCOM connector (on the
front panel)
Adjustment Point : @RV1001/PR-270/270A board
Specifications : B = 430 +20 m V p-p
(Oscilloscope)
RV1001
7]
PR-270 BOARD (A SIDE)
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