Adjustment Location
[BD BOARD] (Conductor Side)
RF
FOK
RV101
RV103
IC101
IC102
TEI
FEI
TEO
RV102
VC
GND
PCK
FEO
TP(TEO)
TP(VC)
oscilloscope
BD board
Procedure :
1. Connect test point TP (ADJ) on DISPLAY board to Ground with
a lead wire.
2. Connect oscilloscope to test point TP (TEO).
3. Turn Power switch on to set the ADJ mode.
4. Put disc (YEDS-18) in and playback.
5. Press the “16” button. (The tracking servo and the sledding servo
are turn off)
6. Confirm that the oscilloscope waveform is symmetrical on the
top and bottom in relation to 0Vdc, and check this level.
Traverse waveform
0V
B
A
level : 300 ± 100 mVp-p
Specified level : •
X
100=less than ± 7%
• A+B=300 ± 100 mVp-p
7. 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.
A-B
2(A+B)
IC104
IC401
R404
TP
ADJ
R405
TP
AFJ
Note : Use the widely use remote commander with 20 keys for this
check.
E-F Balance Check
[DISPLAY BOARD] (Conductor Side)
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