Read Sony DCR-IP45 / DCR-IP45E / DCR-IP55 / DCR-IP55E (serv.man2) Service Manual online
5-61
DCR-IP45/IP45E/IP55/IP55E
1. Overall Level Characteristics Check
Mode
Recording and playback
Signal
400Hz, –7.5dBs signal:
AUDIO L and AUDIO R terminal of
A/V jack
AUDIO L and AUDIO R terminal of
A/V jack
Measurement Point
AUDIO L and AUDIO R terminal of
A/V jack
A/V jack
Measuring Instrument
Audio level meter
Specified Value
–7.5
± 1.0dBs
Checking Method:
1)
1)
Input the 400Hz, –7.5dBs signal in the AUDIO L and AUDIO
R terminal.
R terminal.
2)
Record in the signal.
3)
Playback the recorded section.
4)
Check that the 400Hz signal level is the specified value.
2. Overall Distortion Check
Mode
Recording and playback
Signal
400Hz, –7.5dBs signal:
AUDIO L and AUDIO R terminal of
A/V jack
AUDIO L and AUDIO R terminal of
A/V jack
Measurement Point
AUDIO L and AUDIO R terminal of
A/V jack
A/V 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, –7.5dBs signal in the AUDIO L and AUDIO
R terminal.
R terminal.
2)
Record in the signal.
3)
Playback the recorded section.
4)
Check that the distortion is the specified value.
3. Overall Noise Level Check
Mode
Recording and playback
Signal
No signal:
AUDIO L and AUDIO R terminal of
A/V jack
AUDIO L and AUDIO R terminal of
A/V jack
Measurement Point
AUDIO L and AUDIO R terminal of
A/V jack
A/V 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 shorting plugs in each of AUDIO L and AUDIO R
terminal.
terminal.
2)
Record in the signal.
3)
Remove the shorting plugs.
4)
Playback the recorded section.
5)
Check that the noise level is the specified value.
