![background image](http://html.mh-extra.com/html/icom/ic-m304/ic-m304_service-manual_612754028.webp)
12 - 1
SECTION 12
HM-164B/SW/G
MP8(C)
MP14(C)
W1(C)
MP2(C)
MP17(C)
MP16(C)
MP19(C)
MP4(C)
MP5(C)
MP20(C)
MC1(M)
MP3(C)
MP12(C)
MP7(C)
MP1(C)
MAIN UNIT
MP9(C)
MP6(C)
MP13(C)×5
MP15(C)×5
• CHASSIS PARTS LIST
REF
ORDER
DESCRIPTION
QTY.
NO.
NO.
W1
8900012212 OPC-1249B
[Black]
1
8900013570 OPC-1406
[Super White]
1
8900012502 OPC-1285B
[Gray]
1
MP1
8210023240 2995 FRONT PANEL
[Black]
1
8210023250 2995 FRONT PANEL (A)
[Super White]
1
8210023660 2995 FRONT PANEL (B)
[Gray]
1
MP2
8210020120 2715 REAR PANEL
[Black]
1
8210021240 2715 REAR PANEL (C)
[Super White]
1
8210020380 2715 REAR PANEL (B)
[Gray]
1
MP3
8930060910 2715 KEY
[Black], [Super White]
1
8930061150 2715 KEY (A)
[Gray]
1
MP4
8930060920 2715 PTT RUBBER
[Black], [Super White]
1
8930061160 2715 PTT RUBBER (A)
[Gray]
1
MP5
8930061970 2715 A-PTT HOLDER
1
MP6
8930060940 2715 RUBBER
[Black], [Super White]
1
8930061810 2715 RUBBER (A)
[Gray]
1
MP7
8930060930 2715 MAIN SEAL
1
MP8
8610011600 2715 HANGER KNOB
1
MP9
8930060951 2715 BUSH PLATE-1
1
MP10
8930060990 2715 MIC SHEET
1
MP11
8930061000 2715 MIC TAPE
1
MP12
8930070800 2715 VENT SHEET
1
MP13
8930060960 O-RING (AY)
5
MP14
8930060970 O-RING (AZ)
1
MP15
8820001260 2715 SCREW 2.6X18 SUS
5
MP16
8810010230 Screw BiH M4X8 ZK
1
MP17
8850002000 SPRING WASHER M4 SUS
1
MP19
8810010240 Screw BT B0 2X6NI
2
MP20
8930061700 2715 PTT PLATE
1
S3
MC1
W2
1
C
W1
S4
2
C
1
1
2
2
3
3
4
4
5 5
1
R
R3
R2
R4
L4
12k
470p
0.022
0.22u
0.22u
6.8k
15k
33k
S2
S1
L3
[PTT]
[
Y
]
[
Z
]
[HI/LO]
PTT
MICG
MIC
GND
KEYM
W1 (CHASSIS)
UP ON 2.0V
DN ON 3.0V
HI/LO ON 3.8V
M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side)
S.=Surface mount
• MAIN UNIT PARTS LIST
REF
ORDER
DESCRIPTION
M.
H/V
NO.
NO.
LOCATION
L3 6180003720
COL
SP0203-R22K-PF
0.22U
L4 6180003720
COL
SP0203-R22K-PF
0.22U
R1 7010007590
RES
RD1/4S
123JTA
R2 7010007600
RES
RD1/4
682JTA
R3 7010007610
RES
RD1/4
153JTA
R4 7010007620
RES
RD1/4
333JTA
C1
4030018660 S.CER C1608 JB 1H 223K-T
B
36.85/70.8
C2
4030018670 S.CER C1608 CH 1H 471J
MC1 7700002640
MIC KUC3523-040245
S1 2260002780
SW
SKHHLPA010
S2 2260002790
SW
SKHHAMA010
S3 2260002790
SW
SKHHAMA010
S4 2260002790
SW
SKHHAMA010
W1 9027150010
WIR
71/98/010/X98/X98
W2 9027150010
WIR
71/98/010/X98/X98
62.5 (2
15
/
32
)
UNIT; mm (inch)
88 (3
15
/
32
)
42 (1
21
/
32
)
5.5 (
7
/
32
)
Screw abbreviations
A, B0, BT: Self-tapping PH: Pan head
ZK: Black NI-ZU: Nickel-Zinc SUS: Stainless
• EXPLODED VIEW
• VOLTAGE DIAGRAM
• DIMENTIONS
• REPLACEMENT UNIT
ORDER NO.
UNIT NAME
Optional product
Optional product
Optional product
HM-164B
[Black]
HM-164SW
[Super
White]
HM-164G
[Gray]
M304 A3.indd 16-17
12/27/2006 12:28:25 PM