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
To Active ANT
0V
3.31V
R19
(HM-175GPS)
PTT OFF
ON
PTT
R51 (HM-170GP)
0
R26
10K
IC9
1 5
R27 R43
2
3 4 1
100K 10K
2
3
TC7S14FU
4
(HM-170GP:0)
R25
R56
100
R55
ERTJ0EP473J
R50 C29
0
0.022
IC2
LMV321IDCK
PTT
S1
SKHHLP014A
R13 220
4.7K
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
(HM-170GP:470P)
IC10 IC11
8 1
CK VCC OUT CD
7 2
D PR VDD
6 3
Q CLR VSS NC
5
GND Q
S-80928CNMC
TC7W74F U
Q3
2SC4116
R12
C4
1M
0.0022
R7
(HM-170GP)
R60
68K
0
5
1
4
3
(HM-175GPS)
IC14
2
1
2
3
TC7S66FU
UNR9113J
(HM-175GPS)
1.36V
0V
3.30V
3.3V
220
R23
(HM-175GPS)
R22 100
100
R21
0V
R17
(HM-170GP)
4.7K
IC13
1
2
3
SN74AHC1G04DCK
7 - 2
S02B-EH- S
SPEAKE R
2
1
J2
5
4
3.29V
10K
L5 R57
10U
10
L1
1U
5
1U (HM-170GP)
L4
4
L2
1U
Q6
3.30V
0V
SLF6025T 330M 33U
L3
Q5
6 1
D D
5 2
D D
4 3
S G
CPH6316
IC8
1 5
ON/OFF VIN
2
VSS
MP 1
3 4
VOUT EXT
S-8521F33M C
2775
4.88V
D4
MA2S111
(HM-170GP)
IC6
SN74LVC1G38DCK
5 1 5
2
R61
4 3 4
680
*; Refer to "PARTS LIST."
5V
J1
B8B-ZR-SM4-TF
SP-
1
SP+
2
Vcc
3
MIC
4
NME A
5
XTXD
6
GND
7
PTT
8
3.28V
D6
M A2S111