Read Sony DCR-TRV33 / DCR-TRV33E (serv.man4) Service Manual online
6-52
DCR-TRV33/TRV33E
1. Playback Level Check
Mode
VTR playback
Signal
Alignment tape:
For audio operation check
(XH5-3 (NTSC))
(XH5-3P (PAL))
(XH5-3 (NTSC))
(XH5-3P (PAL))
Measurement Point
Audio left or right terminal of AUDIO
VIDEO jack
VIDEO jack
Measuring Instrument
Audio level meter and frequency
counter
counter
Specified Value
32 kHz mode: 1 kHz, +3.0 ± 2.0dBs
48 kHz mode: 1 kHz, +3.0 ± 2.0dBs
44.1 kHz mode:
The 7.35kHz signal level during EMP
OFF is +2.0 ± 2.0dBs.
The 7.35kHz signal level during EMP
ON is –6 ± 2 dB from the signal level
during EMP OFF.
48 kHz mode: 1 kHz, +3.0 ± 2.0dBs
44.1 kHz mode:
The 7.35kHz signal level during EMP
OFF is +2.0 ± 2.0dBs.
The 7.35kHz signal level during EMP
ON is –6 ± 2 dB from the signal level
during EMP OFF.
Checking Method:
1)
1)
Check that the playback signal level is the specified value.
2. Overall Level Characteristics Check
Mode
Camera recording and playback
Signal
400Hz, –66 dBs signal: MIC jack left
and right
and right
Measurement Point
Audio left or right terminal of AUDIO
VIDEO jack
VIDEO jack
Measuring Instrument
Audio level meter
Specified Value
–7.5 ± 3.0dBs
Checking Method:
1)
1)
Input the 400Hz, –66dBs signal in the MIC jack.
2)
Record in the camera mode.
3)
Playback the recorded section.
4)
Check that the 400Hz signal level is the specified value.
3. Overall Distortion Check
Mode
Camera recording and playback
Signal
400Hz, –66dBs signal: MIC jack left
and right
and right
Measurement Point
Audio left or right terminal of AUDIO
VIDEO jack
VIDEO jack
Measuring Instrument
Audio distortion meter
Specified Value
Below 0.4%
(200Hz to 6kHz BPF ON)
(200Hz to 6kHz BPF ON)
Checking Method:
1)
1)
Input the 400Hz, –66dBs signal in the MIC jack.
2)
Record in the camera mode.
3)
Playback the recorded section.
4)
Check that the distortion is the specified value.
4. Overall Noise Level Check
Mode
Camera recording and playback
Signal
No signal: Insert a shorting plug in the
MIC jack
MIC jack
Measurement Point
Audio left or right terminal of AUDIO
VIDEO jack
VIDEO jack
Measuring Instrument
Audio level meter
Specified Value
Below –45dBs
(IHF-A filter ON, 20kHz LPF ON)
(IHF-A filter ON, 20kHz LPF ON)
Checking Method:
1)
1)
Insert a shorting plug in the MIC jack.
2)
Record in the camera mode.
3)
Playback the recorded section.
4)
Check that the noise level is the specified value.
5. Overall Separation Check
Mode
Camera recording and playback
Signal
400Hz, –66dBs signal: MIC jack
<right> [left]
(Connect the MIC jack <left> [right]
to GND)
<right> [left]
(Connect the MIC jack <left> [right]
to GND)
Measurement Point
Audio <left> [right] terminal of
AUDIO VIDEO jack
AUDIO VIDEO jack
Measuring Instrument
Audio level meter
Specified Value
Below –40dBs (IHF-A filter ON)
< > : Left channel check
[ ] : Right channel check
[ ] : Right channel check
Checking Method:
1)
1)
Input the 400Hz, –66dBs signal in the <right> [left] terminal
of the MIC jack only.
of the MIC jack only.
2)
Record in the camera mode.
3)
Playback the recorded section.
4)
Check that the signal level of the audio <left> [right] terminal
is the specified value.
is the specified value.
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