20
Note :
Clear RF signal waveform means that the shape “
◊
” can be clearly
distinguished at the center of the waveform.
E-F Balance (1 Track jump) Check
Procedure :
1. Connect oscilloscope to TP (TEO) and TP (VC).
2. Turned Power switch on.
3. Load a disc (YEDS-18) and playback the number five track.
4. Press the
X
button. (Becomes the 1 track jump mode.)
5. Confirm that the level B and A (DC voltage) on the oscilloscope
waveform.
6. After check, remove the lead wire connected in step 1.
RF signal waveform
VOLT/DIV : 200mV
TIME/DIV : 500ns
level : 1.45
±
0.3Vp-p
TP(TEO)
TP(VC)
BD board
oscilloscope
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
Adjustment Location:
[BD BOARD]
(Conductor Side)
TP (RF)
TP (VC)
IC103
IC101
TP (TEO)
TP (FE0)