Icom IC-F3GT, IC-F3GS service manual L405 L11

Page 55

5-2 PLL ADJUSTMENT

ADJUSTMENT

ADJUSTMENT CONDITIONS

MEASUREMENT

 

VALUE

ADJUSTMENT

 

 

 

 

 

UNIT

LOCATION

 

UNIT

ADJUST

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PLL LOCK

1

• Operating frequency:

 

MAIN

Connect a digital multi

 

1.3 V

MAIN

L11

VOLTAGE

 

400.000 MHz A

 

meter to check point

 

 

 

 

 

 

440.000

MHz B

 

LV.

 

 

 

 

 

 

470.000

NHz C

 

 

 

 

 

 

 

 

490.000

MHz D, E

 

 

 

 

 

 

 

 

• Receiving

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

• Transmitting

 

 

 

 

1.3 V B

 

L405

 

 

 

 

 

 

 

1.05 V (except B)

 

 

 

 

 

 

 

 

 

 

 

 

 

3

• Operating frequency:

 

 

 

 

3.0–4.5 V

 

Verify

 

 

430.000

MHz A

 

 

 

(A, B, C)

 

 

 

 

470.000

MHz B

 

 

 

2.0–3.7 V D

 

 

 

 

500.000

MHz C

 

 

 

2.5–4.2 V E

 

 

 

 

512.000

MHz D

 

 

 

 

 

 

 

 

520.000

MHz E

 

 

 

 

 

 

 

 

• Receiving

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

• Transmitting

 

 

 

 

3.0–4.5 V A, C

 

 

 

 

 

 

 

 

 

2.7–4.2 V B

 

 

 

 

 

 

 

 

 

2.0–3.7 V D

 

 

 

 

 

 

 

 

 

2.5–4.2 V E

 

 

 

 

 

 

 

 

 

 

 

 

A: 400–430 MHz

B: 440–470 MHz

C: 470–500 MHz

D: 490–512 MHz

E: 490–520 MHz

 

ˆ: N-type

: W-type

˜: M-type

 

 

 

 

 

MAIN UNIT

RF power meter

L405

L11

PLL lock voltage adjustment

LV

PLL lock voltage check point

Bottom view

5 - 4

Image 55
Contents VHF FM Transceivers Ordering Parts IntroductionRepair Notes Table of Contents EIA/TIA Section SpecificationsMain Unit TOP View Inside ViewsBottom View Removing the Main Unit Disassembly and Option InstructionsDisassembly Instruction Removing the Chassis PanelOptional Unit Installations Receiver Circuits Circuit DescriptionTransmitter Circuits PLL Circuit Power Supply Circuits Voltage LineOutput Expander IC IC10 Port AllocationsPreparation Adjustment Procedures¥ JIG cable Top view PLL Adjustment TXF Software AdjustmentSoftware Adjustment Main Unit Parts ListVariable Thermistor NTCCM20124AG473J-T Tantalum ECST0JY106R Chassis Unit Accessories Mechanical Parts and DisassemblyChassis Parts IC-F3GS parts Transistor and FET’S SEMI-CONDUCTOR InformationDiodes General and EIA/TIA Versions Except W/N-TYPE Board LayoutsMain Unit Bottom View MP6ETS/CEPT Version IC1MP5 VHF FI1 Convenient Parts ListDisassembly Information BC-137 Optional Desktop Charger InformasionBoard Layout Voltage DiagramOption Unit Block DiagramBU4066BCFV Voltage DiagramBand of ETS/CEPT version N-type DTA144EU Avref Vtref Toned Tonem Avcc Section Voltage DiagramPage 32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan UHF FM Transceivers IC-F4GTIC-F4GS Preparation PLL Adjustment Software Adjustment Power supply requirement APC IC3A NJM3403AV Disassembly and Option Instructions Optional Unit Installations 2ND if and Demodulator Circuits RF signal From PLL Driver Resistor R132 PLL Circuit Power Supply Circuits Voltage LinePTT Adjustment Procedures Screen Display Example DC Power Cable Connections L405 L11 Powerlo BPF T1 NJM3403AV-TE1 IC4 Resistor ERJ2GE Thermistor NTCCM1608 4LH 223KC Ceramic ECUE1H470JCQ ECEV1CA470SP Other Ceramic ECJ0EB1E471K Band MHz band MHz and H-band IC-F4GS parts DTA144 EU DTC144 EE DTC144 EU DTC144 TU DS1 LOW BandFI1 440-470 MHz Band Except W/N-TYPE Icom 470-500 MHz and High Bands B5542B C308 Q19 B5688B BC-137 Optional Desktop Charger Informasion Voltage Diagram Type Type of GEN Type of GEN and EIA/TIA version NJM3403AV M1-band of GEN and EIA/TIA version G W-type of GEN Type 2SC3585 R44 Q403 2SC5107 O Band of ETS/CEPT version N-type M1 440-470 MHz-band Page 13713IZ-C1U
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