Sony CDP-XE900 Service Manual page 9

QQ
3 7 63 1515 0
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
0V
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
TE
L 13942296513
8. Disconnect the lead wire of TP1 (ADJ) connected in step 1.
[ MAIN BOARD ] — Component Side —
CN302
CN301
TP1 (ADJ)
R362
TP2 (AFADJ)
EB602
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Center of the waveform
B
A (DC voltage)
level : 1.3 ± 0.6 Vp-p
Tracking servo
Tracking servo
Sledding servo
Sledding servo
OFF
ON
x ao
y
i
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8
RF PLL Free-run Frequency Check
Procedure :
1. Connect frequency counter to test point TP (XPLCK) with lead
wire.
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 —
C (DC
voltage)
Q Q
3 6 7 1 3
J301
IC305
u163
.
— 9 —
2 9 9 4 2 8
frequency counter
BD board
TP (XPLCK)
TP (XPLCK)
1 5 0 5 8 2 9 9 4
TP (TE)
IC101
TP (FEI)
IC102
m
co
9 9
2 8 9 9
IC103
TP (VC)
TP (FE)
TP (RF)