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HCD-DX90
QQ
3 7 63 1515 0
Note: Clear RF signal waveform means that the shape "◊" can be
clearly distinguished at the center of the waveform.
RF signal waveform
E-F Balance (1 Track jump) Check
BD board
TP (TEO)
TP (VC)
Procedure:
1.
Connect oscilloscope to TP (TEO) and TP (VC) board.
2.
Turned Power switch on.
3.
Load a disc (YEDS-18) and playback the number five track.
Press the gG button. (Becomes the 1 track jump mode.)
4.
5.
Confirm that the level B and A (DC voltage) on the oscilloscope
waveform.
1 track jump waveform
TE
L 13942296513
0V
level=1.3±0.6Vp-p
x 100=less than ±22%
A
Specification level:
B
6.
After check, remove the lead wire connected in step 1.
RF PLL Free-run Frequency
Procedure :
1.
Connect frequency counter to test point (XPCK) with lead wire.
BD board
TP (XPCK)
2.
Turned Power switch on.
3.
Put the disc (YEDS-18) in to play the number five track.
Confirm that reading on frequency counter is 4.3218MHz.
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.
20
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VOLT/DIV : 200mV
TIME/DIV : 500ns
level : 1.45 ± 0.3Vp-p
oscilloscope
+
–
Center of
waveform
B
A (DC voltage)
Symmetry
frequency counter
+
–
x
ao
y
i
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8
Adjustment Location:
[BD BOARD] (Conductor Side)
(AGCCON)
12
TP
IC103
(TEO)
24
TP
(FEO)
TP
(FEI)
TP
(VC)
TP
(RF)
Q Q
3
6 7
1 3
u163
.
2 9
9 4
2 8
TP
TP
(XPCK)
1
21
20
1
40
IC101
41
80
61
60
TP
(DGND)
1 5
0 5
8
2 9
9 4
m
co
9 9
2 8
9 9
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