Read Sony ICF-SW35 Service Manual online
– 10 –
SECTION 4
DIAGRAMS
4-1. IC PIN DESCRIPTION
• IC201 uPD17072GB-017-1A7 (SYSTEM CONTROL, LCD DRIVER)
Pin No.
Pin Name
I/O
Pin Description
1
CS
O
EEPROM CS control output
2
POWER
O
Power supply (for signal ) start output H: Radio ON L: Radio OFF
3
BAR/ROD
O
Antenna switch output H: BAR ANTENNA L: ROD ANTENNA
4
MUTE
O
MUTE output H: MUTE OFF L: MUTE ON
5
AM/FM
O
Band switch signal output H: SW, MW, LW L: FM
6 – 9
KS0 – 3
O
Key source output
10 – 13
KR0 – 3
I
Key return input
14
INITIAL
O
9K/10K read output
15
NORMAL/FINE
I
Frequency step switch input H: FINE L: NORMAL
16
H/L
O
SW filter switch signal output H: SW L: FM, MW. LW
17
10.25
O
Attenator output
18
GND
—
GND
19
EO
O
Tuner PLL error output
20
VCOL (LW/MW/SW)
I
VCO (SW/MW/LW band) input
21
VCOH (FM)
I
VCO (FM band) input
22
REG0
—
Capacitor terminal (regulator circuit)
23
VDD
—
Power supply terminal (+2.7 V)
24
XOUT
O
Oscillation output (75 kHz)
25
XIN
I
Oscillation input (75 kHz)
26
REG1
—
Capacitor terminal (regulator circuit)
27
REGLCD0
—
LCD driving power supply terminal
28, 29
CAPLCD0, 1
—
LCD driving power supply terminal
30
REGLCD1
—
LCD driving power supply terminal
31 – 34
COM0 – 3
O
LCD drive common output
35 – 49
LCD0 – 14
O
LCD drive segment output
50, 51
VDET1, 2
I
Reducing voltage information input
52
BEEP
O
Beep output
53
TUNE
I
Receive information input
54
HOLD
I
Hold input
55
SCK
O
Serial clock output
56
DI/DO
I/O
Serial data input/output
Click on the first or last page to see other ICF-SW35 service manuals if exist.