Read Sony CCD-TRV63 / CCD-TRV66 / CCD-TRV66PK Service Manual online
5-43
3. IR Audio Deviation Adjustment (VC-214 board)
Mode
VTR recording
Signal
Audio signal :
400Hz, –7.5dBs : L or R of AUDIO
400Hz, –7.5dBs : L or R of AUDIO
terminal
Video signal :
Color bar signal : VIDEO terminal
Color bar signal : VIDEO terminal
Measurement Point
AUDIO L terminal and AUDIO R
terminal of IR receiver jig
(Terminated at 47k
terminal of IR receiver jig
(Terminated at 47k
Ω
)
Measuring Instrument
Audio level meter
Adjustment Page
F
Adjustment Address
67
Specified Value
Signal level: –7.5 ± 2.0 dBs
Level difference of L and R: Below 2dB
Level difference of L and R: Below 2dB
Connection of Equipment
Connect the measuring device as shown in the following figure,
and adjust.
Connect the measuring device as shown in the following figure,
and adjust.
Adjusting method:
1)
1)
Select page: 0, address: 01, and set data: 01.
2)
Connect the audio level meter to the AUDIO L terminal of the
IR receiver jig.
IR receiver jig.
3)
Select page: F, address: 67, change the data and set the 400Hz
audio signal level to the specified value.
audio signal level to the specified value.
4)
Press the PAUSE button of the adjustment remote commander.
5)
Connect the audio level meter to the AUDIO R terminal of the
IR receiver jig.
IR receiver jig.
6)
Check that the 400Hz audio signal level is within the specified
value. If outside, repeat from step 2).
value. If outside, repeat from step 2).
7)
Select page: 0, address: 01, and set data: 00.
(75
Ω
)
600
Ω
Video
L
R
Audio
AUDIO OUT
L
47k
Ω
47k
Ω
(1-249-437-11)
600
Ω
(270
Ω
(1-249-410-11) + 330
Ω
(1-249-411-11))
Pattern generator
Audio oscillator
Main unit
Attenuator
Audio level meter
VIDEO OUT
R
IR receiver jig
Fig. 5-3-18.
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