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• 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.
•
: Pattern from the side which enables seeing.
• Waveforms
IC901 9 (E1), q; (E2)
1
12.4 Vp-p
40.8 µs
5 V/DIV, 20 µ s/DIV
Q908, 909 (Drain)
2
26.8 Vp-p
40.8 µs
10 V/DIV, 20 µ s/DIV
SECTION 3
DIAGRAMS
Note on Schematic Diagram:
• 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
/
W or less unless otherwise
4
specified.
•
f
: internal component.
• 2 : nonflammable resistor.
• C : panel designation.
• A : B+ Line.
• B : B– Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from BATT and REMOTE IN cords.
• Voltages and Waveforms are dc with respect to ground
under no-signal conditions.
no mark : Power on
• 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
: AUDIO
• IC Block Diagram
IN901 µPC494GS
16 15
14
13
12 11
10
9
REG.
REF.
ERROR
ERROR
OSC
0.1V
2
3
5
6
7 8
1
4
9
9
XS-AW81P5
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