4-1.Ic Block Diagrams - Sony ICF-C273 Service Manual

4-1. IC Block Diagrams
IC1 CXA1019M
30 29 28 27 26 25 24 23
AM IF DET AGC
AF POWER AMP
AM FE
FM
DISCRIMINATOR
FM FE
1 2 3 4 5 6 7 8
IC51 LC7213M-TLM-E
20 19 18 17
FILTER
REFERENCE PHASE DETECTOR
DIVIDER CHARGE PUMP
UNLOCK
DETECTOR
SWALLOW COUNTER
1/16. 1/17 4 BITS
12 BIT PROGRAMBLE
DIVIDER
OCB DATA SHIFT REGISTER
I/F
1 2 3 4 5 6
22 21 20 19 18 17 16
TUNING
METER
FM IF
9 10 11 12 13 14 15
16 15 14 13 12 11
POWER
ON
RESET
1/2
UNIVERSAL
LATCH CONTROLER
7 8 9 10
Note:
• 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.
f
Note: The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.
• Voltages are dc with respect to ground under no-signal
conditions.
no mark : FM
( ) : AM
• 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
e : AM
11 11
ICF-C273
Note:
• X : parts extracted from the component side.
• : internal component.
f
•
: Pattern from the side which enables seeing.