Sony HCD-DP800AV Service Manual page 21

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
BD board
TP(TE)
TP(DVC)
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
0V
level=1.3±0.6Vp-p
A
Specified level: –– × 100=less than ±22%
B
6. Adjust RV101 so that A (DC voltage) becomes 0.
VOLT/DIV : 200mV
TIME/DIV : 500ns
level : 1.45 ± 0.3Vp-p
oscilloscope
center of
waveform
B
A (DC voltage)
symmetry
Checking Location:
[BD BOARD]
DVC
RFAC
FE
SE
TE
RFDC
HCD-DP800AV
21