Rec Matrix L+R Check (Au-149 Board); Mhz Deviation Adjustment - Sony Handycam Video 8 CCD-TR606E Service Manual

4. REC matrix L+R check (AU-149 board)
Mode Record
l. 400Hz, -7.5 d8s
Audio input terminal (left)
No signal:
Signal
Audio input terminal (right)
2. No signal:
Audio input terminal (left)·
400Hz, -7.5 d8s:
Audio input terminal (right)
Measurement Point Pin@ofiC801
Measuring Instrument Oscilloscope
The level difference when the signal
is input to only the left tenninal and
Specified Value when the signal is input to only the
right terminal should be 0 ± 20
mVp-p.
Note: When measuring the signal level of Pin@ of IC801, wait
for more than 1 minute after signal input before
measuring. (To regulate the AGC.)
Checking method:
Order Page Address Data Procedure
Input the 400Hz, -7.5 d8s signal only to the left audio
input terminal. (Insert the shorting plug to the right
audio input terminal.)
2
Read the 400Hz signal level of Pin @of IC801, and
note it down. (Approximately 400 mVp-p)
3
Input the 400Hz, -7.5 d8s signal only to the right
audio input terminal. (Insert the shorting plug to the left
audio input terminal.)
4 Check that the 400Hz signal level of Pin @of IC801 is
(the value noted down at step 2) ±20 mVp-p.
-248-
Conditions
Input signal to left channel
only
Input signal to right channel
only
5. 1.5 MHz deviation adjustment
Mode Playback
Alignment tape:
Signal For checking operations
(WR5-5CSP)
Measurement Point Left or right audio output terminal
Measuring Instrument Oscilloscope, level meter
Adjustment
Adjustment Address 78 (1.5 DEV)
Specified Value -7.5
±
0.5 d8s
Adjusting method:
Order Page Address Data
Procedure
1 00 01 Releasing of protect.
2 D 78 Change the data with the PLAY and STOP buttons, and
adjust the 400Hz signal level to the specified value.
3 D 78 Press the PAUSE button.
-249-
Conditions
WR5-5CSP playback mode