Sony MHC-D7 - Page 18

E-F Balance Check
oscilloscope
(DC range)
BD board
eGCr-"—_—~
TP (TEO) ame Ue +
TP (VC) =
Procedure :
1.
“Wn PwWd
Ground main board IC701 (pin @ ) with the lead wire.
Connect oscilloscope to test point TP (TEO) on BD board.
Turned Power switch on.
Put disc (YEDS-18) in and press the [a0 button.
Confirm that the osilloscope waveform is symmetrical on the
top and bottom in relation to OV, and check this level.
Traverse waveform
Specified value: @
6.
level ; 300 + 100mVp-p
X 100 = less than + 7%
A-B
2(A+B)
@ A+B = 300 + 100mVp-p
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.
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 —
i ° FEI
Ter +?
°
GNDO
IC104 noe
o &
: °
@ FEO
Aviot 8 ove 10104
@]
RV103