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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.
r
WAVEFORMS
– BD BOARD –
– CD BOARD –
– MD DIGITAL BOARD –
VOLT/DIV : 1V AC
TIME/DIV : 20 nsec
VOLT/DIV : 1V AC
TIME/DIV : 40 nsec
– TC BOARD –
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