Sony CDX-L450V Service Manual page 47

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
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
specified.
• % : indicates tolerance.
• : internal component.
f
• C : panel designation.
Note: The components identified by mark 0 or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.
• 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 MΩ).
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.
• : parts mounted on the conductor side.
x
• : Through hole.
a
• : 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.
• ( ) : Refer to page of Supplement-1.
• (( )) : Refer to page of Service manual.
SERVO BOARD CN1
3 3
• Waveforms
- Servo Board -
(MODE: CD PLAY)
1 / W or less unless otherwise
4
-
CDX-L450V
1
4.4Vp-p
16.9344MHz
IC1 wd (XTAL)
2
3Vp-p
22.7µsec
IC1 ts (PACK)
3
1.2Vp-p
uj (RFO)
IC1
4
0V
Approx. 1Vp-p
IC1 oa (FEO)
5
0V
Approx. 400mVp-p
IC1 od (TEO)
Main Board -
1
3.8Vp-p
32.768kHz
(XT2)
IC801 ej
2
5Vp-p
8.38MHz
(X2)
IC801 r;