E-F Balance (1 Track Jump) Check - Sony HCD-xb5 Service Manual

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E-F Balance (1 Track Jump) check

(Without remote commander)
BD board
TP (TEO)
TP (VC)
Procedure:
1. Connect oscilloscope to test point TP (TEO) on BD board.
2. Turned power switch on.
3. Put disc (YEDS-18) in to play the number five track.
4. Press the "P (Pause)" button. (Becomes the 1 track jump
mode)
5. Check the level B of the oscilloscope's waveform and the A
(DC voltage) of the center of the Traverse waveform.
Confirm the following:
A – B
× 100 = ±7 (%)
2 (A + B)
1 track jump waveform
0V
level : 500 mV ± 100 mVp-p
TE
L 13942296513
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oscilloscope
+
–
Center of the waveform
B
A (DC voltage)
symmetry
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2 9
8
Adjustment Location:
[BD BOARD] (Conductor Side)
TEO
FEO
GND
IC103
CNU102
Q Q
3 6 7 1 3 1 5
co
.
– 37 –
9 4 2 8
RF
VC
FOK
IC
IC101
I02
0 5 8 2 9 9 4 2 8
m
9 9
9 9