E-F Balance CheckAdjustment Location
Note :Use the widely use remote commander with 20 keys for this
[BD BOARD] (Conductor Side)
check.
oscilloscope
BD boardRF
FOK
RV101
TP(TEO)
TP(VC)
IC101IC102
TEI
Procedure :RV103
FEO
1. Connect test point TP (ADJ) on DISPLAY board to Ground with
TEOFEI
a lead wire.
2. Connect oscilloscope to test point TP (TEO).RV102
3. Turn Power switch on to set the ADJ mode.VC
4. Put disc (YEDS-18) in and playback.
5. Press the O16� 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.
IC104
PCK
Traverse waveform
GND
A
0V
B
[DISPLAY BOARD] (Conductor Side)
level : 300 ? 100 mVp-p
A-B
Specified lev Xel : Y 100=less than ? 7%
2(A+B)
IC401
Y A+B=300 ? 100 mVp-p
7. Remove the lead wire connected in step 1.
R404R405
Focus/Tracking Gain Adjustment (RV102, RV103)
TP
This gain has a margin, so even if it is slightly off.TPAFJ
ADJ
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.
N 10 N |
ACEC
