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21
HCD-DP700
Note:
Clear RF signal waveform means that the shape “
◊
” can be
clearly distinguished at the center of the waveform.
RF signal waveform
E-F Balance (1 Track jump) Check
Procedure:
1.
Connect oscilloscope to TP (TE) and TP (DVC) board.
2.
Turned Power switch on.
3.
Load a disc (LUV-P01) and playback the number nine track.
4.
Press the
bB
button. (Becomes the 1track jump mode.)
5.
Confirm that the level B and A (DC voltage) on the oscilloscope
waveform.
1 track jump waveform
6.
Adjust RV101 so that A (DC voltage) becomes 0.
RF signal waveform
VOLT/DIV : 200mV
TIME/DIV : 500ns
level : 1.45
±
0.3Vp-p
level=1.3
±
0.6Vp-p
symmetry
A (DC voltage)
center of
waveform
B
0V
1 track jump waveform
Specified level: ––
×
100=less than
±
22%
B
A
Checking Location:
[BD BOARD]
TP(TE)
TP(VC)
BD board
oscilloscope
DVC
RFAC
FE
SE
TE
RFDC