HCD-BX3, HCD-DX3, MHC-BX3, MHC-DX3 - Sony Audio Service Manual (repair manual). Page 21

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21
HCD-BX3/DX3
SECTION 7
DIAGRAMS
7-1. CIRCUIT BOARD LOCATION

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
/
4
 
W or less unless otherwise
specified.
•
¢
: internal component.
•
C
: panel designation.
Note on Printed Wiring Boards:
• X
: parts extracted from the component side.
• b
: Pattern from the side which enables seeing.
• Indication of transistor.

Note:
The components identi-
fied by mark 
!
 or dotted
line with mark 
!
 are criti-
cal for safety.
Replace only with part
number specified.

Note:
Les composants identifiés par
une marque 
!
 sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
•
U
: B+ Line.
•
V
: B– Line.
•
H
: adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
• 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.
• Signal path.
F
: FM
f
: AM
E
: PB (DECK A)
d
: PB (DECK B)
G
: REC (DECK B)
J
: CD
c
: digital out
• Abbreviation
CND : Canadian model
AUS
: Australian model
G
: German model
AED
: North European model
EA
: Saudi Arabia model
MY
: Malaysia model
SP
: Singapore model
TH
: Thai model
TW
: Taiwan model
KR
: Korea model
MX
: Mexican model
AR
: Argentina model
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
C
B
These are omitted.
E
Q
B
These are omitted.
C
E
Q
• WAVEFORMS
PANEL Board
LEAF SW Board
HEAD (A) Board
HEAD (B) Board
TRANS Board
SUB-TRANS Board
BD Board
DRIVER Board
MOTOR Board
ADDRESS SENSOR Board
MAIN Board
AMP Board
1
 T301 
4
 REC MODE
135Vp-p
81kHz
2
 IC401 
qd
 STOP MODE
3
 IC401 
qa
 STOP MODE
4.0Vp-p
16.0MHz
3.0Vp-p
32.768kHz
1
 IC601 
oa
 STOP MODE
5.2Vp-p
12.5MHz
– MAIN BOARD –
– PANEL BOARD –
1
 IC101 
yj
 
       CD PLAY MODE
6.4Vp-p
16.9344MHz
1.2Vp-p
2
 IC101 
ta
 
       CD PLAY MODE
3
 IC101 
ra
 
       CD PLAY MODE
4
 IC101 
el
 
       CD PLAY MODE
400nsec/div
approx 200mVp-p
approx 170mVp-p
– BD BOARD –

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