Icom IC-M87 Service Manual page 8

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SECTION 2
• LOGIC UNIT
Bottom view
*: Located under side of this point.
IN/EXT microphone switch
(Q461, Q462: UN911H)
Microphone amplifier
(IC471: NJM2904V)
AF mute
(IC481: TC4W66FU)
S5V regulator
(Q561: 2SA1588)
M5V regulator
Q551: 2SB1132
Q552: XP6501
Q553: DTC144EU
• MAIN UNIT
Top view
Antenna switching circuit
D131, D151: 1SV307
D152: MA77
RF amplifier
(Q165: 3SK294)
Power amplifier
(Q111: RD07MVS1)
Pre-drive amplifier
(Q101: RD01MUS1)
T5V regulator
(Q323: 2SA1588)
R5V regulator
(Q322: 2SA1588)
V5V regulator
(Q321: 2SA1588)
VCO circuit
1st Mixer
(Q191: 3SK299)
AF mute
(IC281: TC4W66FU)
INSIDE VIEWS
Bottom view
2 - 1
AF mute circuit
Q441* : 2SC4116
Q442* : CPH3403
Q443 : CPH3403
Q444 : DTC144EU
EEPROM
(IC591*: HN58X2416TI)
CPU
(IC661: µPC780316GC-511-9EB)
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