CDX-GT49UM/GT490U/GT490US/GT494U
CDX-GT49UM/GT490U/GT490US/GT494U
1717
For Schematic Diagrams:
Note:
• All capacitors are in PF unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in : and
1
/4 W or less unless otherwise
specifi 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
< > : CD PLAY
*
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 M:).
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
L : AUX
c : USB
• Abbreviation
AR : Argentina model
EA : Saudi Arabia model
MX : Mexican 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.)
• Waveforms
– MAIN Board –
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.
Note:
The components identifi ed by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specifi ed.
• Abbreviation
AR : Argentina model
EA : Saudi Arabia model
MX : Mexican model
1.8 Vp-p
32.768 kHz
3.2 Vp-p
7.92 MHz
1 V/DIV, 20 sec/DIV
2 V/DIV, 50 nsec/DIV
1 IC401 qd (X_OUT)
2 IC401 os (OSC_OUT)
0.05 Vp-p
4 MHz
0.05 V/DIV, 50 nsec/DIV
3 IC001 qh (XTAL1)
Ver. 1.1
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