Sony DSX-A50BT, Service Manual

Page: 16 / 40

DSX-A50BT
DSX-A50BT
16 16
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.
•
f
: Internal component.
• : Pattern from the side which enables seeing.
(The other layers’ patterns are not indicated.)
• Waveforms
– MAIN Board –
For Schematic Diagrams.
Note:
• All capacitors are in
—
F 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.
• 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 (detuned) conditions.
no mark : TUNER
• 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.
F
: AUDIO
f
: TUNER
d : USB
E : AUX
a
: Bluetooth
N
: MIC
• Abbreviation
IND
: Indian model
Caution:
Pattern face side:
(Conductor Side)
Parts face side:
(Component Side)
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.
• Indication of transistor.
C
B
These are omitted.
E
Q
2
IC101
qa
(OSCOUT)
1 V/DIV, 50 ns/DIV
126 ns
3.5 Vp-p
1 IC101
9
(XOUT)
1 V/DIV, 20
P
s/DIV
30.5
P
s
2.5 Vp-p
3 IC501
1
(BST),
2
(LX)
5 V/DIV, 1
P
s/DIV
2.4
P
s
18.2 Vp-p
4 IC501
8
(SYNC)
1 V/DIV, 1
P
s/DIV
2.4
P
s
3.3 Vp-p
5 IC201
ug
(X12OUT)
1 V/DIV, 50 ns/DIV
83 ns
3.2 Vp-p
qa IC901
rf
(OSC)
1 V/DIV, 10
P
s/DIV
28.4
P
s
2.6 Vp-p
– KEY Board –
• Abbreviation
IND
: Indian model
Note: When the MAIN board in this unit is replaced, the destination
setting is necessary. Refer to “NOTE THE MAIN BOARD OR
SYSTEM CONTROLLER (IC101) REPLACING” (page 4).
Note: When the MAIN board in this unit is replaced, the destination
setting is necessary. Refer to “NOTE THE MAIN BOARD OR
SYSTEM CONTROLLER (IC101) REPLACING” (page 4).
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.