Overall Noise Level Check; Overall Separation Check - Sony Handycam DCR-PC1 Service Manual

4. Overall Noise Level Check

Mode Camera recording and playback
Signal No signal: MIC jack left and right
(Insert a shorting plug in the MIC
jack)
Measurement Point AUDIO/VIDEO/HEADPHONES
OUT terminal, R- and L-channels
(across 47 kΩ load)
Measuring Instrument Audio level meter
Specified Value Below –45 dBs
(IHF-A filter ON, 20 kHz LPF ON)
Checking Method:
1) Insert a shorting plug in the MIC jack.
2) Record in the camera mode.
3) Playback the recorded section.
4) Check that L- and R-ch noise level of the AUDIO/VIDEO/
HEADPHONES terminal is the specified value.

5. Overall Separation Check

Mode Camera recording and playback
Signal No signal: MIC jack <left>, [right]
1kHz, –66 dBs signal: MIC jack
<right> [left]
Measurement Point Audio <left> [right] terminal of
AUDIO/VIDEO/HEADPHONES
OUT (across 47 kΩ load)
Measuring Instrument Audio level meter
Specified Value Below –40 dBs (IHF-A filter ON)
< > : Left channel check
[ ] : Right channel check
Checking Method:
1) Short the MIC jack <left> [right] terminal with GND using a
jumper.
2) Input the 1kHz, –66 dBs signal in the <right> [left] terminal of
the MIC jack.
3) Record in the camera mode.
4) Playback the recorded section.
5) Check that the signal level of the <left> [right] terminal of
AUDIO /VIDEO HEADPHONES is the specified value.
5-45
ARRANGEMENT DIAGRAM FOR ADJUSTMENT PARTS
VC-210 BOARD (SIDE A)
20
13
24
12 CN2904
25
IC202
19
1
36
37 42
VC-210 BOARD (SIDE B)
S2201
2
1
5-46