Diagrams - Sony NW-MS77DR Service Manual
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Also See for NW-MS77DR:
- Operating instructions manual (64 pages) ,
- Product support bulletin (1 page)
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NW-MS77DR
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 specified.
4
•
%
: indicates tolerance.
• C : panel designation.
• A : B+ Line.
• Power voltage is dc1.2V and fed with regulated dc power supply
from battery terminal.
• Voltages and waveforms are dc with respect to ground under no-
signal (detuned) conditions.
no mark : PLAY
• Voltages are taken with a VOM (Input impedance 10 MW).
Voltage variations may be noted due to normal production toler-
ances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production toler-
ances.
• Circled numbers refer to waveforms.
•
Signal path.
F
: PLAY
E
: CHECK OUT
j
: CHECK IN
• IC401 (microcomputer), IC451 (frash RAM) on Main board
cannot be replaced individually.
Replace it with Main board assembly for service.
• IC461, 463 (frash RAM)) on NAND board cannot be replaced
individually.
Replace it with NAND board assembly for service.
• WAVEFORMS
– MAIN BOARD –
1
IC731 8
OSCOUT
1.1 Vp-p
32KHz
VOL/DIV : 0.5 V AC
TIME/DIV : 10 µ sec
8
SECTION 5
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.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side:
(Side B)
Parts face side:
(Side A)
• Main boards is six-layer pritnted board.
However, the patterns of layer 2 to 5 have not been included in this
diagrams.
• IC401 (microcomputer), IC451 (frash RAM) on Main board cannot
be replaced individually.
Replace it with Main board assembly for service.
• IC461, 463 (frash RAM)) on NAND board cannot be replaced
individually.
Replace it with NAND board assembly for service.
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.
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