Sony HDV HVR-Z7E, Service Manual, Page: 328 / 507

6-138
HVR-Z7J/Z7U/Z7N/Z7E/Z7P/Z7C
10. INPUT1 MIC WIND Filter Check
Mode CAMERA mode
Signal 100 Hz, –50 dBu signal:
XLR terminal (INPUT1)
Measurement Point Audio L terminal of A/V OUT jack
Measuring Instrument Audio level meter, Oscilloscope
Specified value –13 dBs
±
2 dB
(INPUT1 WIND OFF)
Specified value –22 dBs
±
2 dB
(INPUT1 WIND ON)
Note 1:
0 dBu = 0.775 Vrms/balance
Note 2: 0 dBs = 0.775 Vrms
Switch setting
1) INPUT1 switch ................................................................ MIC
Checking method:
1) Set the INPUT1 WIND (AUDIO SET menu: XLR SET) to
“OFF”.
2) Input 100 Hz, –50 dBu signal in the XLR terminal (INPUT1).
3) Check that the 100 Hz signal level is the specified value.
4) Set the INPUT1 WIND (AUDIO SET menu: XLR SET) to
“ON”.
5) Check that the 100 Hz signal level is the specified value.
6) Set the INPUT1 WIND (AUDIO SET menu: XLR SET) to
“OFF”.
11. INPUT2 MIC WIND Filter Check
Mode CAMERA mode
Signal 100 Hz, –50 dBu signal:
XLR terminal (INPUT2)
Measurement Point Audio R terminal of A/V OUT jack
Measuring Instrument Audio level meter, Oscilloscope
Specified value –13 dBs
±
2 dB
(INPUT2 WIND OFF)
Specified value –22 dBs
±
2 dB
(INPUT2 WIND ON)
Note 1: 0 dBu = 0.775 Vrms/balance
Note 2: 0 dBs = 0.775 Vrms
Switch setting
1) INPUT2 switch ................................................................ MIC
Checking method:
1) Set the INPUT2 WIND (AUDIO SET menu: XLR SET) to
“OFF”.
2) Input 100 Hz, –50 dBu signal in the XLR terminal (INPUT2).
3) Check that the 100 Hz signal level is the specified value.
4) Set the INPUT2 WIND (AUDIO SET menu: XLR SET) to
“ON”.
5) Check that the 100 Hz signal level is the specified value.
6) Set the INPUT2 WIND (AUDIO SET menu: XLR SET) to
“OFF”.
12. Microphone Power Supply Check
Mode CAMERA mode
Signal No signal
Measurement Point XLR terminal (INPUT1, INPUT2)
+ probe: pin
2
,
3
– probe: pin
1
Measuring Instrument Digital voltmeter
Specified value A = 1 V or less
B = 46.0
±
3.0 V
Checking method:
1) Connect the + probe of digital voltmeter to the pin
2
on the
INPUT1.
2) Check that the DC voltage (A) satisfies the specified value.
3) Connect the + probe of digital voltmeter to the pin
3 on the
INPUT1.
4) Check that the DC voltage (A) satisfies the specified value.
5) Set the +48V switch (INPUT1) to “MIC+48 V”.
6) Connect the + probe of digital voltmeter to the pin
2 on the
INPUT1.
7) Check that the DC voltage (B) satisfies the specified value.
8) Connect the + probe of digital voltmeter to the pin
3
on the
INPUT1.
9) Check that the DC voltage (B) satisfies the specified value.
10) Set the +48V switch (INPUT1) to “LINE”.
11) For the INPUT2, perform checking in the same manner.