Audio System Adjustments (Dcr-Hc39E); Playback Level Check; Overall Level Characteristics Check - Sony DCR-HC39E Service Manual

3-5. AUDIO SYSTEM ADJUSTMENTS
(DCR-HC39E)
[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. 6-3-9.
In Recording (PLAY/EDIT mode)
Pattern generator
Video output
(75 Ω)
Audio
oscillator
Attenuator
600 Ω (270 Ω (1-249-410-11) +330 Ω (1-249-411-11))
In Playback (PLAY/EDIT mode)
Main unit
A/V OUT
Audio (L)
jack
Audio (R)
Video
DCR-HC39E/HC41/HC42/HC42E/HC43/HC43E
Video
Main unit
L
600 Ω
A/V OUT
R
jack
Audio level meter or
distortion meter
47 k Ω
47 k Ω: 1-249-437-11
TV monitor
Fig. 6-3-9

1. Playback Level Check

Mode
Signal
Measurement Point
Measuring Instrument
Specified Value
Checking Method:
1) Check that the playback signal level is the specified value.

2. Overall Level Characteristics Check

Mode
Signal
Measurement Point
Measuring Instrument
Specified Value
Checking Method:
1) Select page: 7, address: 01, and set data: 94.
2) Select page: 7, address: 04, and set data: 0E.
3) Select page: 7, address: 00, set data: 01, and press the PAUSE
button.
4) Select page: 7, address: 02, and check that the changes to "01".
5) Input the 400 Hz, –7.5 dBs signal in the audio left and right
terminal of A/V OUT jack.
6) Record the signal.
7) Remove the input signal.
8) Playback the recorded section.
9) Check that the 400 Hz signal level is the specified value.
10) Select page: 7, address: 01, and set data: 94.
11) Select page: 7, address: 04, and set data: 0F
12) Select page: 7, address: 00, set data: 01, and press the PAUSE
button.
13) Select page: 7, address: 02, and check that the changes to "01".
6-55
Playback (PLAY/EDIT mode)
Alignment tape:
For audio operation check
(XH5-3P)
Audio left or right terminal of A/V
jack
Audio level meter and frequency
counter
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.
Recording and playback (PLAY/
EDIT mode)
400 Hz, −7.5 dBs signal:
Audio left and right terminal of A/V
OUT jack
Audio left or right terminal of A/V
OUT jack
Audio level meter
–7.5 ± 3.0 dBs