Icom IC-M604A Service Manual - Page 7

HM-157 Optional product, DS1: A0119 - ic

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Page 7 highlights

2-2 HM-157 (Optional product) • TOP VIEW LCD (DS1: A0119) • BOTTOM VIEW CPU (IC1: MPD789405AGK-A30-9EU) Data buffer circuit Reset IC (IC7: S-80928CNMC) 5V regulator (IC5: TA78L05F) MIC amplifier (IC4: NJM2125F) System clock (X1: CSTCC4.91MG) Dimmer circuit 8V regulator (IC6: TA7808F) Volume IC (IC3: M62429FP) AF/MIC switch (IC9: TC4W53FU) AF amplifier (IC2: TA7368F) 2 - 2

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2-2 HM-157 (Optional product)
• TOP VIEW
LCD
(DS1: A0119)
• BOTTOM VIEW
CPU
(IC1: PD789405AGK-A30-9EU)
Data buffer circuit
System clock
(X1: CSTCC4.91MG)
8V regulator
(IC6: TA7808F)
Dimmer circuit
Reset IC
(IC7: S-80928CNMC)
MIC amplifier
(IC4: NJM2125F)
5V regulator
(IC5: TA78L05F)
Volume IC
(IC3: M62429FP)
AF/MIC switch
(IC9: TC4W53FU)
AF amplifier
(IC2: TA7368F)
2 - 2