Sony BU-K4BD43, Service Manual, Page: 41 / 92

41 41
HCD-M10
SECTION 6
DIAGRAMS
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.
•
f
: internal component.
•
5
: fusible resistor.
•
C
: panel designation.
Note on Printed Wiring Boards:
•
X
: parts extracted from the component side.
• : Pattern from the side which enables seeing.
• Indication of transistor.
•
A
: B+ Line.
•
B
: 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.
CD board
No mark: CD
BD/MD DIGITAL board
No mark: MD
( ): MD PB
< >: MD REC
TC board
No mark: REC
( ): PB
Others
No mark: FM
( ): CD
< >: MD
• 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
J
: CD (ANALOG)
c
: CD (DIGITAL)
p
: PB (MD)
k
: REC (MD)
I : DIGITAL IN (OPTICAL)
d
: PB (TAPE)
a
: REC (TAPE)
• Abbreviation
HK : Hong Kong model
SP : Singapore model
KR : Korea model
AUS : Australian model
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
Note:
The components identified by mark
0
or dot-
ted line with mark 0 are critical for safety.
Replace only with part number specified.
IC151
o;
(FS4)
r
WAVEFORMS
1 IC101
ek
(RF)
2
3
IC101
ef
(FE)
(Play mode)
IC101
wh
(TE)
(Play mode)
4
– BD BOARD –
– CD BOARD –
– MD DIGITAL BOARD –
IC701
qd
XOUT
1
IC101
us
XTAO 1
1.3Vp-p
0.2Vp-p
1.6Vp-p
On track jumping
3.5Vp-p
176.4kHz
29.5
µ
s
4.0Vp-p
VOLT/DIV : 1V AC
TIME/DIV : 20 nsec
3.2 Vp-p
100 ns
VOLT/DIV : 1V AC
TIME/DIV : 40 nsec
– TC BOARD –
Q1005
C
1
16.7Vp-p
1060Hz
VOLT/DIV : 5V AC
TIME/DIV : 2
µ
sec
6-1. CIRCUIT BOARDS LOCATION
POWER board
TC board
PANEL board
BL board
BD board
JACK board
LOADING board
CD board
MD DIGITAL board
MAIN board
AMP board
TUNER unit
C
B
These are omitted.
E
Q
B
These are omitted.
C E
Q