HCD-EP50
19
19
L901
FM FREQUENCY
COVERAGE
L902, TC901
FM TRACKING
3.4
0.8
3.2
3.2
3.2
3.2
3.2
0.8
3.2
3.2
(EXCEPT AEP, UK, CH)
0.047
0.047
0.047
0.047
0.001
1SS133T
FM OSC
L902
FM RF
0.047
0.047
0.001
B. P. F.
1 2 3
0.001
FM OSC
BUFFER
0.001
0.047
0.047
0.047
0.047
0.047
1SS133T
0.047
1
5
4
i
i
i
i
GND
i
OSCO
i
VCC
GND
GND
IF OUTPUT
i
RF INPUT
i
VT
IC901
FM RF AMP/MIX/OSC
(INCLUDED IN MAIN BOARD)
3
6-5.
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
6-6.
SCHEMATIC DIAGRAM – FM TUNER Section –
•
See page 28 for IC Block Diagram.
Note on Printed Wiring Board:
•
W
: indicates side identified with part number.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
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.
•
C
: panel designation.
•
A
: B+ Line.
•
H
: adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
(
) : AM
{
} : CD PLAY
[
] : TAPE PLAY
<
> : RECORD (ISS 1)
〈〈
〉〉
: RECORD (ISS 2)
∗
: Impossible to measure
• 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
: TAPE PLAY
a
: RECORD
J
: CD PLAY
• Abbreviation
AR
: Argentina model
CH
: Chinese model
CND : Canadian model
HK
: Hong Kong model
MX
: Mexican model
SP
: Singapore model
Note:
The components identi-
fied by mark
0
or dotted
line with mark
0
are criti-
cal for safety.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque
0
sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce por tant le numéro
spécifié.
