Read Sony DCR-HC1000 / DCR-HC1000E (serv.man4) Service Manual online
6-56
DCR-HC1000/HC1000E
1. Playback Level Check
Mode
Playback (PLAY/EDIT)
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
AUDIO/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.
Note:
NTSC model : DCR-HC1000
PAL model
PAL model
: DCR-HC1000E
Checking Method
1)
1)
Check that the playback signal level is the specified value.
2. Overall Level Characteristics Check
Mode
Recording and playback
(PLAY/EDIT)
(PLAY/EDIT)
Signal
400Hz, -7.5dBs signal:
Audio left and right terminal of
AUDIO/VIDEO jack
Audio left and right terminal of
AUDIO/VIDEO jack
Measurement Point
Audio left or right terminal of
AUDIO/VIDEO jack
AUDIO/VIDEO jack
Measuring Instrument
Audio level meter
Specified Value
-7.5 ± 3.0dBs
Checking Method
1)
1)
Input the 400Hz, -7.5dBs signal in the audio left and right
terminal of AUDIO/VIDEO jack
terminal of AUDIO/VIDEO jack
2)
Record the signal.
3)
Remove the input signal.
4)
Playback the recorded section.
5)
Check that the 400Hz signal level is the specified value.
3. Overall Distortion Check
Mode
Recording and playback
(PLAY/EDIT)
(PLAY/EDIT)
Signal
400Hz, -7.5dBs signal:
Audio left and right terminal of
AUDIO/VIDEO jack
Audio left and right terminal of
AUDIO/VIDEO jack
Measurement Point
Audio left or right terminal of
AUDIO/VIDEO jack
AUDIO/VIDEO jack
Measuring Instrument
Audio distortion meter
Specified Value
Below 0.4% (200Hz to 6kHz BPF ON)
Checking Method
1)
1)
Input the 400Hz, -7.5dBs signal in the audio left and right
terminal of AUDIO/VIDEO jack
terminal of AUDIO/VIDEO jack
2)
Record the signal.
3)
Remove the input signal.
4)
Playback the recorded section.
5)
Check that the distortion is the specified value.
4. Overall Noise Level Check
Mode
Recording and playback
(PLAY/EDIT)
(PLAY/EDIT)
Signal
No signal:
Audio left and right terminal of
AUDIO/VIDEO jack
Audio left and right terminal of
AUDIO/VIDEO jack
Measurement Point
Audio left or right terminal of
AUDIO/VIDEO jack
AUDIO/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)
Connect the audio left terminal of AUDIO/VIDEO jack to GND
using a jumper wire.
Connect the audio right terminal of AUDIO/VIDEO jack to
GND using a jumper wire.
using a jumper wire.
Connect the audio right terminal of AUDIO/VIDEO jack to
GND using a jumper wire.
2)
Record the signal.
3)
Remove the jumper wires.
4)
Playback the recorded section.
5)
Check that the noise level is the specified value.
5. Overall Separation Check
Mode
Recording and playback
(PLAY/EDIT)
(PLAY/EDIT)
Signal
400Hz, -7.5dBs signal:
Audio <right> [left] terminal of
AUDIO/VIDEO jack
No signal:
Audio <left> [right] terminal of
AUDIO/VIDEO jack
Audio <right> [left] terminal of
AUDIO/VIDEO jack
No signal:
Audio <left> [right] terminal of
AUDIO/VIDEO jack
Measurement Point
Audio <left> [right] terminal of
AUDIO/VIDEO jack
AUDIO/VIDEO jack
Measuring Instrument
Audio level meter
Specified Value
Below -40dBs
< > : Left channel check
[ ]
[ ]
: Right channel check
Checking Method
1)
1)
Input the 400Hz, -7.5dBs signal in the audio <right> [left]
terminal of AUDIO/VIDEO jack.
Connect the audio <left> [right] terminal of AUDIO/VIDEO
jack to GND using a jumper wire.
terminal of AUDIO/VIDEO jack.
Connect the audio <left> [right] terminal of AUDIO/VIDEO
jack to GND using a jumper wire.
2)
Record the signal.
3)
Remove the input signal, and remove the jumper wire.
4)
Playback the recorded section.
5)
Check that the signal level of the audio <left> [right] terminal
is the specified value.
is the specified value.
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