Sony ICF-SW40 - Explanation of IC Terminals

SECTION 4
EXPLANATION OF IC TERMINALS
[C201 uPD17072GB-527-1A7 (SYSTEM CONTROL, LCD DRIVE)
KSI Timing signal output, for key matrix.
BAR/ROD Antenna select switch. (“H” : Ferrite-Rod “L” : Telescope)
BAND (FM/AM) Band select switch. (“H” : AM, “L” : FM)
Mute signal output. (“L” : MUTE)
Audio power ON. (“H” : Audio ON)
PWER AUDIO
~ POWER TUNER.
Destination select signal output. (“H” : output)
R
—
w
10.25M
EMCODER-DATA
SEG CONT B
SEG CONT A
3
”n
n A) 7
Ww
16
17
PLL signal output.
20. | VCOL(LW/MWw/sW)
1 VCOH (FM)
AM VCO input
N
Connected to the regulator circuit capacitor. (PLL)
3 VDDI (2V IN)
Power supply 2V
Connected to the liquid crystal oscillator.
x
< Q
x 0
AGEL I
an
VDDS
VDD3
CAP1
CAP2
VDD4
COMO
COMI
COMZ2
* COM3
Power supply for liquid crystal display drive
Liquid crystal display common signal output
\o
Oscillator 75kHz iquid crystals
pas
iS)
FM VCO input.
Ww
Ww a
Wl WwW] Ww WIN NIN
5
8