Bpf F0 Adjustment (Vc-195 Board); Monaural Audio System Adjustment (Ccd-Trv3E/Trv13E/Trv23E) - Sony Handycam CCD-TRV3E Service Manual

3. BPF f0 Adjustment (VC-195 board)

Sets the BPF passing frequency so that the AFM signal can separate
from the playback RF signal properly. If deviated. the mono/stereo
mode will be differentiated incorrectly, and noises and distortions
will increase during high volume playback.
Mode Playback
Signal Alignment tape:
For BPF adjustment
(WR5-11NS (NTSC))
(WR5-11CS (PAL))
Measurement Point Audio output terminal left or right
Measuring Instrument Distortion meter
Adjustment Page F
Adjustment Address 47
Specified Value The Main and Sub channel distortion
rate should be almost the same
(within±1%) and minimum.
Note 1: NTSC model : CCD-TRV75/TRV75PK/TRV715
PAL model : CCD-TRV45E/TRV55E/TRV65E/TRV69E
Adjusting method :
1) Select page: 0, address: 01, and set data: 01.
2) Set the Hi-Fi sound switch (menu display) to "2".
3) Select page: F, address: 47, change the data and minimize the
distortion rate.
4) Press the PAUSE button of the adjusting remote commander.
5) Set the Hi-Fi sound switch (menu display) to "1".
6) Select page: F, address: 47, change the data and minimize the
distortion rate.
7) Press the PAUSE button of the adjusting remote commander.
8) Repeat steps 2) to 7) and set the data of address: 47 so that the
distortions rates when the Hi-Fi sound switch is set to "2" and
set to "1" respectively are almost the same and minimum.
9) Press the PAUSE button of the adjusting remote commander.
10) Select page: 0, address: 01, and set data: 00.
11) Set the Hi-Fi sound switch to "STEREO".
3-7. MONAURAL AUDIO SYSTEM ADJUSTMENT
(CCD-TRV3E/TRV13E/TRV23E)
[Connecting the measuring instruments for the audio]
Connect the audio system measuring instruments besides the video
system measuring instruments as shown Fig. 5-3-25.
• Connection of Audio generator and attenuator.
Audio
generator
Attenuator
Parts cord 600 Ω :
270 (1-249-410-11) + 330 (1-249-411-11)
• Connection of Audio level meter or distortion meter
AUDIO
terminal
Parts cord 47k Ω : 1-249-437-11
5-58
600 Ω
AUDIO
terminal
Audio level meter
or distortion meter
47k Ω
Fig. 5-3-25.