– 9 – – 10 – – 12 –– 11 –
4-2. BLOCK DIAGRAM
• Signal path.
F: FM, TV
f: AM
E: PB
WM-FX277/FX467/FX467ST
Pin No. Pin name I/O Descliption
1 XOUT O Crystal oscillator output (75kHz).
2 TEST2 – Not used (Ground).
3 PA3 I Key input.
4 PA2 I Key input.
5 PA1 I Key input.
6 PA0 I Key input.
7 PB3 O Key output.
8 PB2 O Key output.
9 PB1 O Key output.
10 LOCAL/DX – Not used (OPEN).
11 HOLD I HOLD switch input. “H”: ON, “L”: OFF
12 LOCAL SW – Not used (OPEN).
13 TV (H) – Not used (OPEN).
14 BAND O Band select signal output.
15 SD I Tuning signal detect input.
16 COMP I Comparator input.
17 N/R SW I N/R switch input.
18 BACK UP I Back up voltage input.
19 AMP ON O Power ON/OFF signal output.
20 BEEP O Beep signal output.
21 BATT CHECK I Back up cancel input.
22 BATT REF I A/D reference voltage input.
23 –––––––––– – Not used (Ground).
24 VSS – Ground terminal.
25 RADIO ON O Radio ON signal output.
26 MEGA BASS O MEGA BASS ON signal output.
27 MUTE O Mute ON signal output.
28 TAPE I Tape ON input.
29 PRE CTL O Preamplifier control output.
30 MOTOR CTL O Motor control output.
31 ID I Destination select input.
32-44 S1-13 O LCD segment output.
45-48 COM1-4 O LCD common output.
49-52 DBR1-4 – LCD power supply.
53 RESET I Reset input (Fixed “H”).
54 TU VCC – Not used (OPEN).
55 VDD – Power supply.
56 FM IN I FM input.
57 AM IN I AM input.
58 VSS – Ground terminal.
59 E.O O Error output.
60 LPF IN I LPF input.
61 LPF OUT O LPF output.
62 LPF GND – Ground terminal.
63 TEST 1 – Not used (Ground).
64 X IN I Crystal oscillator input (75kHz).
SECTION 4
DIAGRAMS
4-1. EXPLANATION OF ICTERMINALS
IC702 LC72348W-CFX1705 SYSTEM CONTROL
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w
w
.
x
i
a
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1
6
3
.
c
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Q
Q
3
7
6
3
1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
