Sony MHC-V44D, Service Manual, Page: 37 / 62

MHC-V44D
MHC-V44D
37 37
Note on Schematic Diagram:
• All capacitors are in μ F unless otherwise noted. (p: pF)
50 V or less are not indicated except for electrolytics
and
tantalums.
• All resistors are in
Ω
and 1 /
4
W or less unless otherwise
speci
fi
ed.
•
2
: non
fl
ammable resistor.
•
C
: panel designation.
• Note for Printed Wiring Boards and Schematic Diagrams
•
A
: B+ Line.
•
B
: B– Line.
•
H
: Adjustment for repair.
• Voltage 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
Ω ).
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 (ANALOG)
L
: USB
J
: AUDIO (DIGITAL)
N
: MIC
• Abbreviation
AR :
Argentina model
AUS : Australian model
E4 : African model
E12 : 220-240 V AC area in E model
E93 : 240 V AC area in E model
LA9 : Latin-American model
MY : Malaysia model
RU : Russian model
TH : Thai model
Note on Printed Wiring Board:
•
X
: parts extracted from the component side.
• : parts extracted from the conductor side.
• : Pattern from the side which enables seeing.
(The other layer’s patterns are not indicated.)
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.
Note:
The components identi
fi
ed by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number speci
fi
ed.
• Abbreviation
AR :
Argentina model
AUS : Australian model
E4 : African model
E12 : 220-240 V AC area in E model
E93 : 240 V AC area in E model
LA9 : Latin-American model
MY : Malaysia model
RU : Russian model
TH : Thai model
C
B
These are omitted.
E
Q
t Indication of transistor
D
G
These are omitted.
S
Q
B
These are omitted.
C E
Q
B
These are omitted.
C E
Q
Note 1:
When the DAMP board is replaced, spread the
compound referring to “NOTE OF REPLACING
THE IC2002 and IC2003 ON THE DAMP BOARD
AND THE COMPLETE DAMP BOARD” on
servicing notes (page 5).
Note 4:
When the SMPS board is replaced, spread the
bond referring to “BOND FIXATION OF ELECTRIC
PARTS” on servicing note (page 7).
Note 3:
When the DAMP board is replaced, spread the
bond referring to “BOND FIXATION OF ELECTRIC
PARTS” on servicing notes (page 7).
Note 2:
When the SMPS board is replaced, spread the
compound referring to “NOTE OF REPLACING
THE IC965, Q908 AND Q909 ON THE SMPS
BOARD” on servicing notes (page 6).
Note 5:
When the MS-476 board is defective, exchange
the entire CDM90 ASSY.
Note 6:
When the complete MOTHERBOARD board
is replaced, refer to “NOTE OF REPLACING
MOTHERBOARD BOARD OR BLUETOOTH
MODULE OR RC-S730 (WW) BOARD” on page 6.
Ver. 1.1