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E-F Balance (1 Track Jump) Check
BD board
TP (TE)
TP (VC)
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%
1 track jump waveform
0V
level : 1.3 ± 0.6 Vp-p
oscilloscope
(DC range)
+
–
Center of the waveform
B
A (DC voltage)
symmetry
RF PLL Free-run Frequency Check
Procedure :
1. Connect frequency counter to test point (PLCK) with lead wire.
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 :
[BD BOARD] (Side B)
PLCK
– 10 –
frequency counter
+
–
10
5
1
11
15
20
TE
FE
RF
VC
TEI
14
10
5
1
20
15
25
28
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