– 13 –
E-F Balance Check
+
–
oscilloscope
(DC range)
TP (TEO)
BD board
TP (VC)
Procedure :
1. Ground main board IC701 (pin #ª) with the lead wire.
2. Connect oscilloscope to test point TP (VC) and TP (TEO) on BD
board.
3. Turned Power switch on.
4. Put disc (YEDS-18) in and press the fl button.
5. Confirm that the osilloscope waveform is symmetrical on the
top and bottom in relation to 0V, and check this level.
Traverse waveform
specified value : r
A–B
2 (A+B)
X100 = less than ± 7%
r
A+B = 300 ± 100mVp-p
level : 300
±
100mVp-p
A
B
0V
6. Remove the lead wire connected in step 1.
Focus/Tracking Gain Adjustment (RV102, RV103)
This gain has a margin, so even if it is slightly off. There is no prob-
lem.
Therefore, do not perform, this adjustment.
Please note that it should be fixed to mechanical center position when
you moved and do not know original position.
Adjustment Location :
[BD BOARD] (Conductor side)
IC102
FEI
TEI
FOK
IC101
RF
RV101
RV102
IC104
FEO
TEO
VC
PCK
GND
RV103
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