Sony HCD-D790 Service Manual page 24

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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
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oscilloscope
+
–
Center of the waveform
B
A (DC voltage)
symmetry
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8
Adjustment Location:
[BD BOARD] (Conductor Side)
TP
(RF)
IC101
TP (TEO)
TP (FEO)
TP
(GND)
IC103
CNU102
Q Q
3 6 7 1 3 1 5
co
.
9 4 2 8
TP
(VC)
TP
(FOK)
IC
I02
0 5 8 2 9 9 4 2 8
m
9 9
9 9