Sony GV-D200E, Service Manual, Page: 120 / 166

5-30
3. IR Audio Deviation Adjustment (VC-250 board)
Mode VTR stop
Signal Video : No signal
Audio : –400Hz, –7.5dBs, Audio left
and right terminal of AUDIO/VIDEO
jack
Measurement Point AUDIO L terminal and AUDIO R
terminal of IR receiver jig
(Terminated at 47k
Ω
)
Measuring Instrument Audio level meter
Adjustment Page F
Adjustment Address 7F
Specified Value Signal level: –7.5 ± 1.0 dBs
Level difference of L and R: Below
2dB
Connection of Equipment:
Connect the measuring device as shown in the following figure,
and adjust.
Adjusting method:
Order Page Address Data Procedure
1 0 01 01 Set the data.
2 Connect the audio level meter to
the AUDIO L terminal of the IR
receiver jig.
3 F 7F Change the data and set the
400Hz audio signal level to the
specified value.
4 F 7F Press PAUSE button.
5 Connect the audio level meter to
the AUDIO R terminal of the IR
receiver jig.
6 F 7F Check that the 400Hz audio
signal level is within the
specified value. If outside, repeat
from step 2.
7 0 01 00 Set the data.
Main unit
Audio oscillator
Audio Left
(White)
Video
(Yellow)
Audio Right
(Red)
Attenuator
AUDIO/VIDEO
INPUT
IR receiver jig
AUDIO OUT
L R
Audio level meter
47k
Ω
600
Ω
600
Ω
: 270
Ω
(1-249-410-11) + 330
Ω
(1-249-411-11)
47k
Ω
(1-249-437-11)
Fig. 5-3-17.