Sony ICF-C121 Service Manual page 7

5-2. SCHEMATIC DIAGRAM
• IC Block Diagram
IC1 CXA1019S
30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
AM IF DET AGC
TUNING
METER
AF POWER AMP AM FE FM IF
FM
DISCRIMINATOR
FM FE
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
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 / W or less unless otherwise
4
specified.
• ¢ : internal component.
• C : panel designation.
Note:
Note:
Les composants identifiés par
The components identi-
une marque ! sont critiques
fied by mark ! or dotted
line with mark ! are criti- pour la sécurité.
cal for safety. Ne les remplacer que par une
Replace only with part piéce por tant le numéro
number specified. spécifié.
– 9 –
• U : B+ Line.
• H : adjustment for repair.
• Voltages are dc with respect to ground under no-signal
(detuned) conditions.
no mark : FM
( ) : AM
∗
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F : FM
f : AM
– 10 –
ICF-C121