5 - 1
SECTION 5
BOARD LAYOUTS
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C13
C14
C15
C16
C17
C18
C19
C20
C21
C23
C24
D3
EP1
IC1
IC2
IC3
J1
MC1
Q3
R1
R2
R3
R4
R5
R7
R8
R9
R13
R14
R16
R17
R19
R20
R21
R22
R23
S1
B6842C
H0
H5
H10
H15
H20
H25
H30
H35
H40
V0
V5
V10
V15
V20
V25
V30
V35
V40
V45
V50
V55
C3
C4
C6
C7
C8
C9
C10
C11
C12
C15
C16
C17
C18
C20
C28
C29
C43
C44
C51
C54
C55
C57
C58
C59
D5
D7
IC2
IC8
IC14
J1
J2
L1
L2
L3
L4
L5
MP1
Q3
Q5
Q6
R4
R5
R6
R7
R8
R12
R21
R22
R23
R25
R41
R42
R53
R55
R56
R57
R59
R60
S1
B6796D
MC1
H0
H5
H10
H15
H20
H25
H30
H35
H40
V0
V5
V10
V15
V20
V25
V30
V35
V40
V45
V50
V55
DS1
R1
B6861B
H0
H5
H10
H15
V0
V5
• MAIN-A UNIT (for HM-169, HM-174)
(TOP VIEW)
GND
SW
3.3V
LED
GND
SW
3.3V
LED
• SW UNIT (for HM-170GP HM-175GPS only)
(TOP VIEW)
• MAIN-B UNIT (for HM-170GP HM-175GPS)
(TOP VIEW)
SP+
1
SP−
2
SP1 (CHASSIS)
W1 (CHASSIS)
SP–
SP+
VCC
MIC
GND
PTT
SP–
SP+
VCC
MIC
NMEA
XTXD
GND
PTT
