Note For Printed Wiring Boards And Schematic Diagrams - Sony XR-4300RV Service Manual

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6-4.

NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

Note on Printed Wiring Board:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• b : 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 from
(Conductor Side) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Component Side) the parts face are indicated.
T E
L 1 3 9 4 2 2 9 6 5 1 3
w w w
.
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Note on 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
1 / W or less unless otherwise
4
specified.
• f : internal component.
• C : panel designation.
• U : B+ Line.
• Power voltage 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 : FM
( ) : MW/LW
〈〈 〉〉 : TAPE PLAYBACK
∗
: Impossible to measure
• 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
: MW/LW
L : BUS AUDIO IN
E
: TAPE PLAY
x a o u 1 6 3
y
i
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• Waveforms
– MAIN Board –
1 IC51 5 (OSCI)
2.6 Vp-p
231 ns
2 IC501 ud (X1A)
3.2 Vp-p
305 µ s
Q Q 3 IC501 od (X1)
3 7 6 3 1 5 1
5.5 Vp-p
272 ns
c o
.
17 17
2 4 2
9 8
5 0 8 9 2 4 9 8 2
m
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