Sony HCD-DX70 - E-F Balance (1 Track jump) Check

19
HCD-DX70
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 (TEO) 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.
VOLT/DIV : 200mV
TIME/DIV : 500ns
level : 0.65 ± 0.15Vp-p (RFDC)
1.1 ± 0.4Vp-p (RFAC)
oscilloscope
BD board
TP (TEO)
TP (DVC)
+
–
DVC
Center of
waveform
B
Symmetry
A (DC voltage)
level=1.0±0.5Vp-p
Checking Location:
[BD BOARD]
DVC
RFAC
RFDC
FEO
TEO