Logic Unit - Icom IC-M302 Service Manual

11-3 LOGIC UNIT

J2
NMEA+ NMEA+
1
B4B–ZR–SM3–TF
NMEA– NMEA–
2
ICF3 ICF3
3
4
DIM MAX: 12.4V Q2
R21
2SB1132 R
27
HVS
R22
27
5V
Q4 R23
Q3
27
2SC4116 BL
2SC4116 BL
R24
39 k
5V 5V
IC2
R35 PC357N6T IC3
220
TC7S14FC
1 5
2
3 4
D3
R37
DA204K
15 k
5V
Q6 DTC114TU
R38
1 k
C18
0.01
5V
IC4
BR24L32FV–W
1 8
A0 VCC
2 7
A1 WP
3 6
A2 SCL
4 5
VSS SDA
IC5
BD5242FVE–TR
1 5
5V
VOUT VDD
2
SUB
3 4
CT GND
5V
4.20V
2.80V
1.40V
HVS
5V
1
P67/AN7
KEYM 2
P66/AN6
TXDET 3
P65/AN5
SQLV 4
P64/AN4
5
P63/SCLK22/AN3
PCK 6
P62/SCLK21/AN2
PDATA 7
P61/SOUT2/AN1
WXDEC 8
P60/SIN2/AN0
9
P57/ADT/DA2
10
P56/DA1
11
CP4 P55/CNTR1
BEEP 12 IC1
P54/CNTR0
PSTB 13
P53/RTP1 M37560MFA–303GP
14
P52/RTP0
15
P51/PWM1
16
P50/PWM0
17
P47/SRDY1
18
P46/SCLK1
19
P45/TXD
20
P44/RXD
21
P43/TOUR
DSCDEC 22
P42/INT2
UNLK 23
P41/INT1
24
P40
25
P77
R61 100 k
HVS HVS
R62
10 k
5V 5V
R54
6.8 k
R65
1 M
X1
CR–769
7.9872 MHz
IC6
NJM2904M
R: 3.95V
5V
DS1
IS08251E00V0
HVS
5V 5V
5V
75 SEG14
SEG13
74 SEG13
SEG14
73 SEG12
SEG15
72 SEG11
SEG16
71 SEG10
SEG17
70 SEG9
P30/SEG18
69 SEG8
P31/SEG19
68 SEG7
P32/SEG20
67 SEG6
P33/SEG21
66 SEG5
P34/SEG22
65 SEG4
P35/SEG23
64 SEG3
P36/SEG24
63 SEG2
P37/SEG25
62 SEG1
P00/SEG26
61
P01/SEG27
60
P02/SEG28
59
P03/SEG29
58
P04/SEG30
57
P05/SEG31
56
P06/SEG32
55
P07/SEG33
54
P10/SEG34
53
P11/SEG35
52
P12/SEG36
51
P13/SEG37
RMUTE
H/L
SQLC
PTTC
S1 S2 S3 S4 S5 S6 S7
SCAN CH/WX CH16 DN UP DSC DTRS
11 - 3
CP2
HVS SP–
CP1
SP+
SP+ SP+
30
SP– SP–
29
BEEP BEEP
28
BPLVL BPLVL
27
SQLV SQLV
26
HVS HVS
25
24
5V 5V
23
5V 5V
22
DSCENC DSCENC
21
WXDEC WXDEC
20
RMUTE RMUTE
19
DSCDEC DSCDEC
18
PTTC PTTC
17
RCV RCV
16
PTT PTT
15
SEND SEND
14
KEYM KEYM
13
TMUTE TMUTE
12
SQL SQL
11
TXDET TXDET
10
SQLC SQLC
9
H/L H/L
8
BPF BPF
7
PSTB PSTB
6
PCK PCK
5
PDATA PDATA
4
UNLK UNLK
3
GND GND
2
GND GND
1
BPLVL
RCV
SEND
TMUTE
RMUTE
H/L
SQLC
PTTC
J1
30FLT–SM1–TB