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E-F Balance Check
-—~ Page 14 —
oscilloscope
BD board
a"
pay TP (TEO) o
TP (VC) ©
Procedure:
1, Connect test point TP703 (ADJ2) on Main board to Ground with
a lead wire.
. Connect oscilloscpe to test point TP (TEO)
. Turned Power switch on.
. Put disc (YEDS-18) in and playback.
. Confirm that the oscilloscope waveform is symmetrical on the
top and bottom in relation to 0Vdc, and check this level.
AR
WN
Traverse waveform
OV
level: 300+ 100 mVp-p
A-B
2 (A + B)
*
A+B=300+ 100 mVp-p
Specified level:
x 100 = less than + 7%
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.
Adjustment Location:
[BD BOARD] — Component Side —
Oo
Ea OHeG
[MAIN BOARD] — Conductor Side —
.
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