9
D-NE500/NE506CK
TP644
RP642
TP640
TP639
TP636
TP635
TP633
TP632
TP631
TP610
TP701
R641
C608
C603
R608
R611
C616
C604
R620
R610
C615
R606
R618
C614
R605
R616
C613
R631
TP648 TP646
FB603
FB602
FB301
C610
C623
FB606
C609
VDR603
C625
R613
R103
TP627
TP623
TP621
TP622
TP626
TP630
R203
R315
R630
R314
C311
R625
R614
R603
R602
R609
C611
R615
R612
C605
R604
R624
R623
C621
R628
61
90
91
30
120
IC601
1
60
31
TP301
TP629
TP625
TP302
TP102
TP610
– MAIN BOARD (SIDE B) –
CD SECTION
CD section adjustments are done automatically in this set.
In case of operation check, confirm that focus bias.
FOCUS BIAS CHECK
1. Connect the oscilloscope between TP610 (RF) and GND on
main board.
2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01)
3. Press the
N
X
button.
4. Confirm that the oscilloscope waveform is as shown in the
figure below. (eye pattern)
A good eye pattern means that the diamond shape ( ) in the
center of the waveform can be clearly distinguished.
• RF signal reference waveform (eye pattern)
Test Point:
When observing the eye pattern, set the oscilloscope for AC range
and raise vertical sensitivity.
RF level :
0.45
±
0.1 Vp-p
VOLT/DIV : 20 mV (10 : 1 probe in use)
TIME/DIV : 500 nS
SECTION 4
ELECTRICAL ADJUSTMENTS
Summary of Contents for CD Walkman D-NE500
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