Sony HCD-VP800AV Service Manual page 20

HCD-VP800AV
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) Adjustment
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 (YEDS-18) and playback the number five track.
Press the X button. (Becomes the 1track jump mode.)
4.
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
x 100=less than ±22%
Specification level:
6. Adjust RV101 so that (DC voltage) becomes 0.
7. After check, remove the lead wire connected in step 1.
20
VOLT/DIV : 200mV
TIME/DIV : 500ns
level : 1.1 ± 0.3Vp-p
oscilloscope
+
–
Center of
waveform
B
A (DC voltage)
Symmetry
Adjustment Location :
[ BD (CD) BOARD ] — SIDE B —
TP (DVC)
TP(SE)
TP(FE)
TP(TE)
RV101
TP(RFDC)
IC103
TP
(RFAC)
IC101
TP
(XPCK)