Sony MEX-BT39UW Manuale di servizio - Pagina 23
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THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
For Printed Wiring Boards.
Note:
• X : Parts extracted from the component side.
• Y : Parts extracted from the conductor side.
•
W : Indicates side identifi ed with part number.
•
: Internal component.
f
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side:
Parts on the pattern face side seen
(SIDE B)
from the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(SIDE A)
the parts face are indicated.
• Indication of transistor.
C
Q
These are omitted.
B
E
• Abbreviation
CND : Canadian model
EA
: Saudi Arabia model
MX
: Mexican model
RU
: Russian model
MEX-BT39UW/BT3900U/BT3950U
For Schematic Diagrams.
Note:
• All capacitors are in μF 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
specifi ed.
•
: Internal component.
f
• C : Panel designation.
Note:
Note:
The components identi-
Les composants identifi és
fi ed by mark 0 or dotted
par une marque 0 sont
line with mark 0 are criti-
critiques pour la sécurité.
cal for safety.
Ne les remplacer que par
Replace only with part
une pièce portant le nu-
number specifi ed.
méro spécifi é.
• A : B+ Line.
• Power voltages is dc 14.4V and fed with regulated dc
power supply from ACC and BATT cords.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : TUNER (FM)
(
) : TUNER (AM or MW)
<
> : CD PLAY
*
: Impossible to measure
• Voltages are taken with VOM (Input impedance 10 MΩ).
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.
: AUDIO
F
: TUNER
f
J
: CD PLAY
p : Bluetooth
: USB
c
: MIC
N
: AUX IN
L
a
: BUS AUDIO IN
• Abbreviation
CND : Canadian model
EA
: Saudi Arabia model
MX
: Mexican model
RU
: Russian model
• Circuit Boards Location
KEY board
– Front panel –
• Waveforms
– MAIN Board –
IC501 qa (XOUT)
1
2.9 Vp-p
30.5 s
1 V/DIV, 20 s/DIV
IC501 qd (OSCOUT)
2
3.5 Vp-p
126 ns
2 V/DIV, 50 ns/DIV
IC001 qh (XTAL1)
3
0.05 Vp-p
250 ns
0.05 V/DIV, 50 ns/DIV
23
23
MEX-BT39UW/BT3900U/BT3950U
SERVO board
SWITCH board
BT board
MAIN board
ANTENNA board
– Main unit –