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E-F Balance Check
BD board
TP (TEO)
TP (VC)
Procedure :
1. Connect test point TP (ADJ) on Main board to Ground with a lead
wire.
2. Connect oscilloscope to test point TP (TEO).
3. Turned Power switch on.
4. Put disc (YEDS-18) in and playback.
5. Confirm that the oscilloscope waveform is symmetrical on the
top and bottom in relation to 0Vdc, and check this level.
Traverse waveform
0V
TE
L 13942296513
A-B
X 100=less than ± 7%
Specified level : •
2(A+B)
• A+B=300 ± 100 mVp-p
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 problem.
Therfore, 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.
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http://www.xiaoyu163.com
oscilloscope
A
B
level : 300 ± 100 mVp-p
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Adjustment Location :
[BD BOARD] (Conductor Side)
RF
RV101
IC101
RV103
FEO
TEO
RV102
VC
IC104
GND
[MAIN BOARD] (Conductor Side)
Q Q
3
6 7
1 3
1 5
IC701
TP701
(ADJ)
co
.
9 4
2 8
FOK
IC102
TEI
FEI
PCK
0 5
8
2 9
9 4
2 8
m
9 9
9 9
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