CCD-TRV128 (serv.man2) - Sony Movie Service Manual (repair manual). Page 39

6-37

Before performing the audio system adjustments, check that the
data of page: 0, address: 10 is “00”.
If not, select page: 0, address: 10, and set data “00”.

Connect the audio system measuring instruments in addition to
the video system measuring instruments as shown in Fig. 6-3-11.

Main unit

47 k

Ω

47 k

Ω

: 1-249-437-11

Audio level meter

or distortion meter

TV monitor

A/V OUT 

jack

Video

Audio

Set the BPF passing frequency of IC801 so that the AFM signal
can separate from the playback RF signal properly. If deviated,
the noises and distortions will increase during high volume play-
back.

Mode

VTR playback (PLAY/EDIT mode)

Signal

Alignment tape

For BPF adjustment
(WR5-11NS (NTSC))
(WR5-11CS (PAL))

Measurement Point

Audio terminal of A/V OUT jack

Measuring Instrument

Distortion meter

Adjustment Page

C

Adjustment Address

30

Specified value

The distortion rate should be
minimum.

 Check that the data of page: 0, address: 10 is “00”.

Order Page Address Data

Procedure

1

0

01

01

2

C

30

Change the data and minimize
the distortion rate.

3

C

30

Press PAUSE button.

4

0

01

00

Adjust to the optimum 1.5 MHz audio FM signal deviation.
If the adjustment is not correct, its playback level will differ from
that other units.

Mode

VTR playback (PLAY/EDIT mode)

Signal

Alignment tape

For checking operation
(WR5-5NSP (NTSC))
(WR5-5CSP (PAL))

Measurement Point

Audio terminal of A/V OUT jack

Measuring Instrument

Audio level meter

Adjustment Page

C

Adjustment Address

2F

Specified value

–7.5 

± 2.0 dBs

Check that the data of page: 0, address: 10 is “00”.

Perform “BPF f

0

 Adjustment” before this adjustment.

Order Page Address Data

Procedure

1

0

01

01

2

C

2F

Change the data and set the
400 Hz audio signal level to
the specified value.

3

C

2F

Press PAUSE button.

4

0

01

00