CCD-TR648E, CCD-TR748E, CCD-TR848 - Sony Movie Service Manual (repair manual). Page 127

5-37

Connect the audio system measuring instruments in addition to the
video system measuring instruments as shown in Fig. 5-3-11.

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

Mode

Playback

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

F

Adjustment Address

73

Specified Value

–7.5 ± 2.0dBs

1

0

01

01

Set the data.

2

F

73

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

3

F

73

Press PAUSE button.

4

0

01

00

Set the data.

Sets the BPF passing frequency of IC351 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 terminal of A/V OUT jack

Measuring Instrument

Distortion meter

Adjustment Page

F

Adjustment Address

74

Specified Value

The distortion rate should be minimum.

1

0

01

01

Set the data.

2

F

74

Change the data and minimize the
distortion rate.

3

F

74

Press PAUSE button.

4

0

01

00

Set the data.

Fig. 5-3-11.

Ω

Ω