— 8 —
6. Check the level B of the oscilliscope's waveform and the A (DC
voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ± 22%
Traverse waveform
Center of the waveform
B
level : 1.3 ± 0.6 Vp-p
0V
A (DC voltage)
7. Press the “8” button. (The tracking servo and sledding servo are
turned ON.) Confirm the C (DC voltage) is almost equal to the
A (DC voltage) is step 6.
Traverse waveform
0V
Tracking servo
Sledding servo
OFF
Tracking servo
Sledding servo
ON
C (DC
voltage)
8. Disconnect the lead wire of TP1 (ADJ) connected in step 1.
RF PLL Free-run Frequency Check
Procedure :
1. Connect frequency counter to test point (PLCK) with lead wire.
frequency counter
BD board
TP (PLCK)
2. Turn 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.
Adjustment Location :
[ BD BOARD ] — Side A —
10
1
IC103
20
11
(RF)
(FE)
(FEI)
(TE)
(PLCK)
IC101
(TEI)
(VC)
[ MAIN BOARD ] — Component Side —
CN202
CN201
TP1 (ADJ)
TP2 (AFADJ)
IC401
J301
IC801
w
w
w
.
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9
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2
8
9
4
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8
T
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L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
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9
4
2
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8
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5
1
5
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7
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Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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