Sony MDX-C7900, Руководство по обслуживанию

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MDX-C7900/C7900R
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– 44 –
– 45 – – 46 –
5-9. PRINTED WIRING BOARD – PANEL Section –
• Semiconductor
Location
(Conductor Side)
Ref. No. Location
D802 B-12
D803 B-12
D804 B-12
D806 B-6
D807 B-6
D808 C-12
D819 B-2
Q801 B-5
Q802 B-5
Q803 B-5
Q804 B-5
Q805 B-2
• Semiconductor
Location
(Component Side)
Ref. No. Location
D811 C-3
D812 B-3
D813 A-4
D814 A-2
D815 B-1
D816 C-2
D817 A-11
IC801 B-8
Q806 C-4
Q807 B-1
Note on Printed Wiring Board:
• X : parts extracted from the component 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.
5-10. SCHEMATIC DIAGRAM – PANEL Section – • See page 46 for Waveform.
Note on Schematic Diagram:
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
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
specified.
• 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 (AMBER Illumination)
(
) : FM (GREEN Illumination)
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
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.