– 10 –
E-F Balance (1 Track Jump) Check
+
–
BD board
TP (TE)
TP (VC)
oscilloscope
(DC range)
Procedure :
1. Connect oscilloscope to test point TP(TE) on BD board.
2. Turned Power switch on.
3. Put disc (YEDS-18) in to play the number five track.
4. Press the “
P
(Pause)” button. (Becomes the 1 track jump mode)
5. Check the level B of the oscilloscope’s waveform and the A (DC
voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ±22%
0V
Center of the waveform
A (DC voltage)
level : 1.3
±
0.6 Vp-p
1 track jump waveform
symmetry
B
RF PLL Free-run Frequency Check
Procedure :
1. Connect frequency counter to test point (PLCK) with lead wire.
+
–
frequency counter
BD board
TP (PLCK)
2. Turned Power switch on.
3. Put disc (YEDS-18) in to play the number five track.
Confirm that reading on frequency counter is 4.3218MHz.
Adjustment Location :
1
5
10
11
15
20
1
5
10
14
28
25
20
15
[BD BOARD] (Side B)
TE
FE
RF
VC
PLCK
TEI