Mhz Deviation Adjustment (Vc-195 Board); Bpf Adjustment (Vc-195 Board) - Sony CCD-TRV15 Service Manual

1. 1.5 MHz Deviation Adjustment (VC-195 board)

Adjust to the optimum audio FM signal distortion.
If the adjustment is not correct, its playback level will differ from
that of other units.
Mode Playback
Signal Alignment tape:
For checking the operation
(WR5-5NSP (NTSC))
(WR5-5CSP (PAL))
Measurement Point Audio output terminal
Measuring Instrument Audio level meter
Adjustment Page F
Adjustment Address 45
Specified Value –7.5±0.5dBs
Note 1: NTSC model: CCD-TRV15/ TRV15PK/ TRV25/
TRV25PK/ TRV35/ TRV215
PAL model: CCD-TRV15E/ TRV15EP/ TRV35E
Adjusting method :
1) Select page: 0, address: 01, and set data: 01.
2) Select page: F, address: 45, change the data and set the 400Hz
signal level to the specified value.
3) Press the PAUSE button of the adjusting remote commander.
4) Select page: 0, address: 01, and set data: 00.

2. BPF Adjustment (VC-195 board)

Adjust to the optimum audio BPF characteristics of the IC.
If the adjustment is not correct, the distortion rate and S/N ratio will
worsen.
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method :
1) Select page: 0, address: 01, and set data: 01.
2) Select page: F, address: 47, change the data and minimize the
distortion rate.
3) Press the PAUSE button of the adjusting remote commander.
4) Select page: 0, address: 01, and set data: 00.
5-60
Playback
Alignment tape:
For BPF adjustment
(WR5-11NS (NTSC))
(WR5-11CS (PAL))
Audio output terminal
distortion meter
F
47
The distortion rate should be and
minimum.