Sony CDX-GT450U, Service Manual

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CDX-GT50UMS/GT450U/GT457UE/GT500U/GT500US/GT505U
CDX-GT50UMS/GT450U/GT457UE/GT500U/GT500US/GT505U
17 17
• Waveforms
– MAIN Board –
For Schematic Diagrams.
Note:
• All capacitors are in μ F unless otherwise noted. (p: pF) 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
speci fi ed.
•
f
: Internal component.
• C : Panel designation.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
• A : B+ Line.
•
B
: B– Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
(
) : AM or MW
< > : CD PLAY
* : Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 M Ω ).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
J
: CD
F
: FM
f
: AM or MW
L
: AUX
c : USB
• Abbreviation
RU
: Russian model
AR : Argentina model
EA : Saudi Arabia model
MX : Mexican model
IND : Indian model
For Printed Wiring Boards.
Note:
• X : Parts extracted from the component side.
• Y : Parts extracted from the conductor side.
•
a
: Through hole.
• : Pattern from the side which enables seeing.
(The other layers’ patterns are not indicated.)
• Abbreviation
RU
: Russian model
AR : Argentina model
EA : Saudi Arabia model
MX : Mexican model
IND : Indian model
Caution:
Pattern face side:
(SIDE B)
Parts face side:
(SIDE A) Parts on the pattern face side seen
from the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
2.9 Vp-p
32.768 kHz
3.5 Vp-p
7.92 MHz
1 V/DIV, 20 ȝ sec/DIV
2 V/DIV, 50 nsec/DIV
1
IC501
qa
(XOUT)
2
IC501
qd
(OSCOUT)
0.05 Vp-p
4 MHz
0.05 V/DIV, 50 nsec/DIV
3
IC001 qh (XTAL1)
Note: The components identi fi ed by mark 0 or dotted
line with mark
0
are critical for safety.
Replace only with part number speci fi ed.