Sony HCD-DP700 - S-Curve, RF Level, and E-F Balance Checks

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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
oscilloscop
e
DVC
RFAC
FE
SE
TE
RFDC