Icom HM-169 Service Manual page 14

• MAIN-B UNIT (for [HM-170GP], [HM-175GPS])
SKQLLCE012
CP5
S2
D_GND
1
CP6
SW
2
CP7
J1
3.3V
3
CP8
LED
4
DS1
UY1113F-TR
SW UNIT
Q4
XP1501
R37
10K C26 1
2.72V
MICROPHONE
MMZ1005Y102CT
MC 1
EP1
AM-627P
2.11V
1.36V
SKHHLP014A
To Active ANT
0V
3.31V
R13
R19 4.7K
(HM-175GPS)
PTT OFF
PTT ON
R51 (HM-170GP)
0
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R26
10K
IC9
1 5
R27 R43
2 IC10
3 4 1
100K 10K CK
2
D
TC7S14FU 3
Q
4
GND
TC7W74F U
(HM-170GP:0)
R25
R56
100
1M
R55
ERTJ0EP473J
5
1
R50
C29
3
0
0.022
2
IC2
LMV321IDCK
PTT
S1
220
R23
220
(HM-175GPS)
R22
R21
J5
1 2
3 4
BOOT NMEA TX
5 6
7 8
XRESET NMEA RX
9 10
11 12
13 14
15 16
AXK816145YG
3.22V
0V
1s
S02B-EH- S
(HM-170GP:470P)
IC11
8 1 5
VCC OUT CD
7 2
PR VDD
6 3 4
CLR VSS NC
5
Q
S-80928CNMC
Q3
2SC4116
R12
10K
C4
R7 0.0022
(HM-170GP)
R60
68K
0
4
(HM-175GPS)
IC14
1 5
2
3 4
TC7S66FU
Q6
UNR9113J
(HM-175GPS)
1.36V
0V
3.30V
3.3V
Q5
6
5
4
IC8
100
1
ON/OFF
2
VSS
3
100 VOUT
S-8521F33M C
4.88V
D4
0V
MA2S111
R17
(HM-170GP)
4.7K
IC13
1 5 1
2 2
3 4 3
SN74AHC1G04DCK
7 - 2
SPEAKE R
2
1
J2
3.29V
5V
L5 R57
J1
10U
10
B8B-ZR-SM4-TF
SP-
1
SP+
2
Vcc
L1 3
MIC
4
NME A
1U 5
XTXD
6
GND
7
PTT
8
1U (HM-170GP)
L4
L2
1U
3.30V
0V
3.28V
SLF6025T 330M 33U
L3
1
D D
2
D D
3
S G
CPH6316
5
VIN
MP 1
4
EXT
2775
D6
M A2S111
(HM-170GP)
IC6
SN74LVC1G38DCK
5
R61
4
680
*; Refer to "PARTS LIST."