7
D-NE509
R608
C307
FB303
FB101
FB201
R603
R602
R622
C608
C607
C605
R621
R623
C609
R626
C613
C624
Q601
R610
R670
C304
R646
R301
TJ606
TJ603
TP654
TJ604
TP652
R662
R628
R629
C614
R630
C611
C601
R633
R632
C699
C612
R625
R624
R663
R619
R618
C308
C632
VDR308
VDR307
VDR306
S814
SOUND/AVLS
TP948
TP949
SL601
TP646
TP946
TJ201
TJ101
TJ301
J301
TP627
TP645
TP647
TP653
TP651
TJ601(RF)
TJ602(LO)
TP914
TP628
TP626
TP618
TP620
TP616
TP617
TP625
TP619
SL602
TP622
TP621
TP623
TP624
EC B
C631
L601
C610
i
TJ601 (RF)
– MAIN BOARD – (SIDE B)
3-4. SLED MO TOR ASSY (M501), OPTICAL PICK-UP, TURNTABLE MOTOR ASSY (M502)
3
5
4
sled motor assy
(M501)
1
three screws
(B1.7x4)
chassis
8
three screws
(B1.7x4)
9
turntable motor assy
(M502)
6
optical pick-up
(DAX-25E)
7
standard shaft
2
gear cover
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
CD section adjustments are done automatically in this set.
In case of operation check, confirm that focus bias.
4-1. FOCUS BIAS CHECK
1. Connect the oscilloscope between TJ601 (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 Points:
When observing the eye pattern, set the oscilloscope for AC range
and raise vertical sensitivity.
Summary of Contents for CD Walkman D-NE509
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