Icom IC-4008MKII service manual Board Layouts, Main Unit, TOP View IC-4008A

Page 21

SECTION 9 BOARD LAYOUTS

9-1 MAIN UNIT

TOP VIEW (IC-4008A)

C20

D2

DS1

C95

R22

R61

C15

 

R27

R74

R98

 

C53

R76

C60

 

C63

IC5

C96

C97

R26

 

Q11

 

R201

 

 

R200

 

C71

Q14

R119

Q101

R114

 

 

R115

 

Q27

 

 

 

 

D101

 

D5

 

 

 

 

 

DS2

 

 

 

C42

R25

R24

 

 

R49

 

 

 

 

C9

W3

 

 

R89

 

 

 

 

 

 

 

 

 

 

 

R90

C75

C74

 

R55

C50

 

 

 

 

 

 

 

 

 

 

R56

Q28

 

C48

C18

C49

C81

C55

C17

R23

C88

Q18

R80

C67

C62

 

R78

 

 

 

C65

Q25

 

 

R77

D4

 

 

 

C64

C57

IC6

C52

 

 

 

 

R42

 

 

 

 

C35

R43

 

 

 

 

 

 

 

R41

 

 

 

 

 

 

 

C90

R12

 

R37

 

C32

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R38

 

C80

 

C8

 

 

Q7

 

 

 

 

 

 

MC1

 

 

 

 

 

 

C31

C36

R36

R45

C34

W7

R46

C89

C7

 

R13

 

 

 

 

 

 

R202

Q3

R10

 

 

 

 

C79

 

 

R50

 

 

C4

 

 

 

 

R118

C5

 

Q6

C3

R31

R110

C25

R9

 

9 - 1

Image 21
Contents UHF FM Transceiver LPD FM Transceiver Introduction Ordering PartsRepair Notes Table of Contents ITA, ITA-1 CSA, CSA-1 Section SpecificationsCtcss Frequency List Channel Frequency ListInside Views Main UnitRF Unit Removing the Rear Panel Disasembly InstructionsRemoving the Main Unit Removing the RF UnitCircuit Description Antenna Switching Circuit RF UnitReceiver Circuits RF Circuit RF UnitPLL Circuits RF Unit Transmitter CircuitsPower Supply Circuits Voltage Line Port AllocationsCPU Main unit IC1 Entering the Adjustment Mode Section Adjustment ProceduresPreparation Required Test EquipmentDeviation AdjustmentR206 C63R50 TestOrder Description Section Parts ListRF Board Coil Eljre 18NG-F C211 4030006860 Mechanical Parts and Disassembly AccessoriesCabinet Parts Chassis Parts Unit abbreviation C Chassis PARTS, RF RF UNIT, M Main Unit SEMI-CONDUCTOR Information Transistor and FET’SDiodes Board Layouts Main UnitTOP View IC-4008A Bottom View IC-4008A R58C55 C17 R23 C18 C52 PSC Batt MOD VOL GND TOP View RF UnitBottom View FI3IC1 Block DiagramDTA144EU Voltage DiagramRF Unit 16, Kamihigashi, Hirano-ku, Osaka 547-0002, Japan 16, Kamihigashi, Hirano-ku, Osaka, 547-0002, Japan