Sony CCD TRV16 Service Manual - Page 138

IR Audio Deviation Adjustment VC-215 board

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3. IR Audio Deviation Adjustment (VC-215 board) Mode Signal Measurement Point Measuring Instrument Adjustment Page Adjustment Address Specified Value VTR recording Audio signal : 400Hz, -7.5dBs : AUDIO terminal Video signal : Color bar signal : VIDEO terminal AUDIO terminal of IR receiver jig ( Terminated at 47kΩ) Audio level meter F 67 Signal level: -7.5±2.0dBs Connection of Equipment Connect the measuring device as shown in the following figure, and adjust. Adjusting method: 1) Select page: 0, address: 01, and set data: 01. 2) Connect the audio level meter to the AUDIO terminal of the IR receiver jig. 3) Select page: F, address: 67, change the data and set the 400Hz audio signal level to the specified value. 4) Press the PAUSE button of the adjusting remote commander. 5) Select page: 0, address: 01, and set data: 00. Pattern generator VIDEO OUT (75 Ω) Main unit Video Audio oscillator Attenuator 600 Ω Audio 600 Ω (270 Ω (1-249-410-11) + 330 Ω (1-249-411-11)) Fig. 5-3-20. IR receiver jig AUDIO OUT Audio level meter 47kΩ 47kΩ (1-249-437-11)

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3. IR Audio Deviation Adjustment (VC-215 board)
Mode
VTR recording
Signal
Audio signal :
400Hz, –7.5dBs : AUDIO terminal
Video signal :
Color bar signal : VIDEO terminal
Measurement Point
AUDIO 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±2.0dBs
Connection of Equipment
Connect the measuring device as shown in the following figure,
and adjust.
Adjusting method:
1)
Select page: 0, address: 01, and set data: 01.
2)
Connect the audio level meter to the AUDIO terminal of the IR
receiver jig.
3)
Select page: F, address: 67, change the data and set the 400Hz
audio signal level to the specified value.
4)
Press the PAUSE button of the adjusting remote commander.
5)
Select page: 0, address: 01, and set data: 00.
Fig. 5-3-20.
Pattern generator
Audio oscillator
VIDEO OUT
(75
Ω
)
Attenuator
600
Ω
600
Ω
(270
Ω
(1-249-410-11) + 330
Ω
(1-249-411-11))
Video
Main unit
Audio
IR receiver jig
AUDIO OUT
Audio level meter
47k
Ω
47k
Ω
(1-249-437-11)