Read Sony CMT-ED1 / HCD-ED1 / HCD-ED1A Service Manual online
– 12 –
P
r
o
c
e
d
u
r
e
:
1. Connect oscilloscpe to test point
TP (TE) on BD boar d.
2. Turn P ower s witc h on.
3. Put disc (YEDS-18) in to pla
3. Put disc (YEDS-18) in to pla
y the n umber five trac
k.
4. Press the “P (Pause)” button. (Becomes the 1 trac
k jump mode)
5. Confirm that the oscilloscope wa
veform is symmetrical on the
top and bottom in relation to 0Vdc, and check this level.
1 track jump waveform
E-F Balance (1 Track Jump) Check
(Without remote commander)
(Without remote commander)
Specified le vel: • x 100 = less than
±
7%
• 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 mar
gin, so e ven if it is slightl
y 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.
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)
Adjustment Location:
[BD BOARD] — Component Side —
–
+
oscilloscope
BD board
TP (TE)
TP (VC)
TP (VC)
A
B
0V
LEVEL : 300
±
100 mVp-p
RF
RV101
RV103
TEO
VC
FEO
RV102
TEI
FEI
FOK
IC101
IC104
GND
PCK
IC102
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