DCR-HC51E, DCR-HC52, DCR-HC52E, DCR-HC53E, DCR-HC54, DCR-HC54E (serv.man4) - Sony Movie Service Manual (repair manual). Page 46

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DCR-HC51E/HC52/HC52E/HC53E/HC54/HC54E_ADJ
3-5.
AUDIO  SYSTEM  ADJUSTMENTS
[Connecting the measuring instruments for the audio]
Connect the audio system measuring instruments in addition to
the video system measuring instruments as shown in Fig. 6-3-6.
Fig. 6-3-6
Audio
oscillator
Attenuator
600 Ω
600 Ω (270 Ω (1-249-410-11) +330 Ω (1-249-411-11))
Main unit
Main unit
47 k Ω
47 k Ω: 1-249-437-11
Audio level meter or
distortion meter
TV monitor
A/V R
 jack
Pattern generator 
Video output
 (75 Ω)
A/V R
jack
(L)
(R)
Video
Audio (L)
Audio (R)
In Recording (CAMERA mode)
In Playback (PLAY/EDIT mode)
Audio
Video
Audio
1.
Playback Level Check
Mode
Playback (PLAY/EDIT mode)
Signal
Alignment tape:
For audio operation check
(XH5-3 (NTSC))
(XH5-3P (PAL))
Measurement Point
Audio left or right terminal of A/V R
jack
Measuring Instrument
Audio level meter and frequency
counter
Specified Value
32 kHz mode: 1 kHz, + 3.0 
± 2.0 dBs
48 kHz mode: 1 kHz, + 3.0 
± 2.0 dBs
44.1 kHz mode:
The 7.35 kHz signal level during EMP
OFF is +2.0 
± 2.0 dBs.
The 7.35 kHz signal level during EMP
ON is 
−6 ± 2 dB from the signal level
during EMP OFF.
Note 1: 0dBs = 0.775Vrms
Note 2 :NTSC model: DCR-HC52/HC54
PAL model: DCR-HC51E/HC52E/HC53E/HC54E
Checking Method:
1) Check that the playback signal level is the specified value.
2.
Overall Level Characteristics Check
Mode
Recording (CAMERA mode) and
playback (PLAY/EDIT mode)
Signal
400 Hz, 
−7.5 dBs signal:
Audio left and right terminal of A/V R
jack
Measurement Point
Audio left or right terminal of A/V R
jack
Measuring Instrument
Audio level meter
Specified Value
–7.5 
± 3.0 dBs
Note : 0dBs = 0.775Vrms
Checking Method:
1) Select page: 7, address: 05, and set the bit value of bit 7 to  “1”.
2) Input the 400 Hz, –7.5 dBs signal in the audio left and right
terminal of A/V R jack.
3) Record the signal.
4) Remove the input signal.
5) Playback the recorded section.
6) Check that the 400 Hz signal level is the specified value.
7) Select page: 7, address: 05, and set the bit value of bit 7 to  “0”.
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