Voltage Diagram - Icom IC-M422 Service Manual

SECTION 12 HM-150B/SW
12-1 MECHANICAL PARTS AND DISASSEMBLY
[CHASSIS PARTS]
REF. NO. ORDER NO. DESCRIPTION
W1 8900012212 Cable OPC-1249B [HM-150B]
8900013570 Cable OPC-1406 [HM-150SW]
MP1 8210020111 2715 front panel -1
[HM-150B]
8210021061 2715 front panel (C)-1 [HM-150SW]
MP2 8210020120 2715 rear panel [HM-150B]
8210021240 2715 rear panel (C) [HM-150SW]
MP3 8930060910 2715 key
MP4 8930060920 2715 PTT rubber
MP5 8930061970 2715 A-PTT holder
MP7 8930060930 2715 main seal
MP8 8930011600 2715 hanger knob
MP9 8610060951 2715 bush plate-1
2715 MIC plate
MP10 8310060990
MP11 8310061000 2715 MIC tape
MP12 8820061010 2715 A-MIC sheet
MP13 8850060960 O-ring (AY)
MP14 8930060970 O-ring (AZ)
MP15 8820001260 2715 screw 2.6 ×18 SUS
Screw BiH M4 × × 8 ZK
MP16 8810010230
MP17 8850002000 Spring washer M4 SUS
Screw PH B0 2 ×
MP19 8810010240 × 6 NI (BT)
MP20 8930061700 2715 PTT plate
Screw and washer abbreviations
B0, BT: Self-Tapping PH: Pan head
NI: Nickel SUS: Stainless
ZK: Black BiH: Bind head
MP19 (C)
MP4 (C)
MP5 (C)
MP20 (C)
MAIN UNIT
MC1 (M)
MP8 (C)
MP3 (C)
MP12 (C)
HM-150B/SW
UNIT abbreviations
MP1 (C)
[MAIN PARTS]
QTY. REF. NO. ORDER NO. DESCRIPTION
1 MC1 7700002640 MIC KUC3523-040245
1
1
1
1
1
1
1 Unit: inch
1
1
15 21
2 / 1 /
32 32
1
1
1
1
1
5
1
5
1
1
3
1
MP15 (C)
MP13 (C)
MP9 (C)
MP17 (C)
MP16 (C)
MP2 (C)
MP10 (C)
MP7 (C)
W1 (C)
(C): CHASSIS PARTS, (M): MAIN UNIT
12 - 1

12-2 VOLTAGE DIAGRAM

MIC
QTY.
1
PTT
UP
7
/
32
DOWN
H/L
MP8 (C)
MP14 (C)
MC1
KUC3523-040245
W4
C1 R1
0.022
12k
W3
S1
SKHHLP014A
W2
W1
UP ON 2.0V
DN ON 3.0V
S2 H/L ON 3.8V
SKHHAM024A
R2
6.8k
S3
SKHHAM024A
R3
15k
S4
SKHHAM024A
R4
33k
CHASSIS UNIT
W1 OPC1081 [BLK]
OPC1082 [SW]
PTT
1
MICG
2
MIC
3 to MAIN unit J4
GND
4
KEYM
5