Sony MHC-V21D Service Manual page 36

2018/08/28 21:56:45 (GMT+09:00)
MHC-V21/V21D
Ver. 1.1
• Note for Printed Wiring Boards and Schematic Diagrams
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: 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.
Indication of transistor
C
Q These are omitted.
B E
D
Q These are omitted.
G S
Q
B C E
These are omitted.
Q
B C E
These are omitted.
Note 1: When the MOTHERBOARD board is replaced,
s p r e a d t h e c o m p o u n d r e f e r r i n g t o " N O T E
O F R E P L A C I N G T H E I C 2 0 0 2 O N T H E
MOTHERBOARD BOARD AND THE COMPLETE
MOTHERBOARD BOARD" on servicing notes
(page 7).
Note 2: When the MS-476 board is defective, exchange
the entire LOADING COMPLETE ASSY (T).
Note 3: When the complete MOTHERBOARD board
is replaced, be sure to refer to "DESTINATION
SETTING METHOD" on page 5.
MHC-V21/V21D
Note on Schematic Diagram:
• All capacitors are in μF unless otherwise noted. (p: pF)
50 V or less are not indicated except for electrolytics
and tantalums.
• All resistors are in  and
1 / W or less unless otherwise
4
specifi ed.
• 2 : nonfl ammable resistor.
• C : panel designation.
Note: The components identifi ed by mark 0 or
dotted line with mark 0 are critical for safety.
Replace only with part number specifi ed.
Note: Les composants identifi és par une marque
0 sont critiques pour la sécurité.
Ne les remplacer que par une pièce portant
le numéro spécifi é.
• 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 MΩ).
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.
: USB
L
: MIC
N
• Circuit Boards Location
PANEL board
SMPS board
MS-476 board
IR board
SPK LED board
36 36
MIC USB board
NFC board
MOTHERBOARD board
SYS SET