HCD-EC68/EC78
HCD-EC68/EC78
23
23
For Schematic Diagrams.
Note:
• All capacitors are in
μ
F unless otherwise noted. (p: pF)
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
speci
fi
ed.
•
f
:
internal
component.
•
2
: non
fl
ammable resistor.
•
C
: panel designation.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
•
A
: B+ Line.
•
B
: B– Line.
•
C
: adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
– CD Board –
no mark
: CD PLAY
– DECK Board –
no mark : TAPE PLAY
( ) : TAPE REC
– Other Boards –
no mark
: TUNER (FM/AM)
( ) : TAPE PLAY
< > : TAPE REC
{ } : CD PLAY
• 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
:
FM
f
:
AM
J
: CD PLAY
E
:
TAPE
PLAY
j
:
REC
i
: AUDIO IN
• Abbreviation
AR :
Argentina
model
AUS :
Australian
model
E2
: 120V AC area in E model
E3
: 240V AC area in E model
E51
: Chilean and Peruvian models
MX
: Mexican model
RU :
Russian
model
For Printed Wiring Boards.
Note:
•
X
: Parts extracted from the component side.
•
Y
: Parts extracted from the conductor side.
•
W
: indicated side identi
fi
ed with part number.
•
f
: Internal component.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
• Indication of transistor.
C
B
These are omitted.
E
Q
• Circuit Boards Location
KEY POWER board
PANEL board
DECK board (except EC68:UK)
MAIN board
HI AMP board (EC78)
LOW AMP board
PT board
REG board
JACK board
KEY CD board
CD board
B
These are omitted.
C E
Q
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.
Caution:
Parts face side:
(Conductor Side)
Pattern face side:
(Component Side)
Parts on the parts face side seen from
the pattern face are indicated.
Parts on the pattern face side seen from
the parts face are indicated.
SECTION 7
DIAGRAMS
w w w . x i a o y u 1 6 3 . c o m
Q Q 3 7 6 3 1 5 1 5 0
9
9
2
8
9
4
2
9
8
T E L
1 3 9 4 2 2 9 6 5 1 3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
