Sony CDX-L450V - Fm/am Compact Disc Player, Руководство по обслуживанию

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3 3
CDX-L450V
TABLE OF CONTENTS
1. Printed Wiring Boards –CD Mechanism Section– .................. 4
2. Schematic Diagram –CD Mechanism Section– ...................... 6
3. Printed Wiring Boards –Main Section– ................................... 7
4. Schematic Diagram –Main Section (1/2)– .............................. 8
5. Schematic Diagram –Main Section (2/2)– .............................. 9
6. Electrical Parts List ................................................................ 11
7. Exploded Views ..................................................................... 16
7-1. Chassis Section .................................................................. 16
7-2. CD Mechanism Section (1) ............................................... 17
7-3. CD Mechanism Section (2) ............................................... 18
7-4. CD Mechanism Section (3) ............................................... 19
TEST DISC
This set can playback CD-R disc. The following test disc should be
used to check the capability.
• CD-R test disc TCD-R082LMT (Part No. J-2501-063-1)
EXTENSION CABLE AND SERVICE POSITION
When repairing or serving this set, connect the jig (extension cable)
as shown below.
• Connect the Main board (CNP701) and the Servo board (CN1)
with the extension cable (Part No. J-2502-062-1).
MAIN BOARD CNP701
SERVO BOARD CN1
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
for schematic diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in
Ω
and 1 /
4
W or less unless otherwise
specified.
• % : indicates tolerance.
•
f
: internal component.
• C : panel designation.
• A : B+ Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
f
: AM
J
: CD
for printed wiring boards:
• X : parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
x
: parts mounted on the conductor side.
•
a
: Through hole.
• : Pattern from the side which enables seeing.
(The other layer’s patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B)
pattern face are indicated.
Parts face side: Parts on the parts face side seen from the
(Side A)
parts face are indicated.
Note: The components identified by mark
0
or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.
• ( ) : Refer to page of Supplement-1.
• (( )) : Refer to page of Service manual.
— Main Board —
1
2
32.768kHz
IC801 ej (XT2)
3.8Vp-p
5Vp-p
8.38MHz
IC801
r; (X2)
• Waveforms
— Servo Board —
(MODE: CD PLAY)
1
2
3
IC1
ts (PACK)
IC1 uj (RFO)
1.2Vp-p
4
Approx. 1Vp-p
IC1 oa
(FEO)
0V
5
Approx. 400mVp-p
IC1 od
(TEO)
4.4Vp-p
16.9344MHz
IC1 wd
(XTAL)
3Vp-p
0V
22.7µsec