Connection, Jig, AD-92SMA | Icom IC-T90A guide

• CONNECTION

Standard signal generator to the antenna connector 0.1 V to 32 mV

( 127 dBm to 17 dBm)

CAUTION:

DO NOT transmit while an SSG is connected to the antenna connector.

to [MIC]

Audio generator

JIG

+

FM

deviation meter

Attenuator

40 dB or 50 dB

RF power meter 0.1 10 W/50

Frequency

counter

to [SP] jack

1/8" (3.5 mm)

3-conductor plug

AD-92SMA

Optional SMA BNC adaptor

Power supply

11 V / 3 A

5 - 2

Image 19

Icom IC-T90A manual Connection, Jig, AD-92SMA

Contents

IC-t90a Sample Order IntroductionOrdering Parts Repair Notes Table of Contents General SpecificationsTransmitter WFM ReceiverFrequency MHz WFM Bottom view Inside ViewsLogic Unit Top view RF Unit AF UnitTop view Bottom view Removing the rear panel Removing the AF unit Disassembly Instructions Receiver Circuits Circuit Description 5 2ND if and Demodulator Circuits AF Unit 4 1ST Mixer and 1ST if Circuits RF, AF and VCO UnitsRF Circuit Squelch Circuitaf and Logic Units AF Amplifier Circuit AF Unit2ND if and Demodulator Circuit Transmitter Circuits APC Circuit PLL CircuitsAPC Circuit RF Unit General PLL Circuit VCO Divider Circuit VCO and RF Units Voltage Line Power Supply Circuits2 R3V Switch IC AF Unit IC51 Port Allocations CPU Logic Unit IC1 SEG35 CtselDtcs LCD Preparation Adjustment ProceduresOperation on the Adjustment Mode Operation on the Output Power Adjustment JIG ConnectionAD-92SMA Voltage Trimmer AdjustmentPLL Lock VCO L19 VCO UnitRF Unit L16 L456 Frequency Adjustment Mode AdjustmentsReference Dial Adjustment Mode Adjustments PH ch 53.900 MHz Transmitting 8V 145 MHz Displayed frequency Connect an amme 45 a R326 Logic UnitR325 R365 Ctcss Coil DetectorTracking L151 AF UnitCP0 IC151, pin 12 SD line Displayed frequency Connect a DC volt Maximum voltage Meter Adjustment Adjustment Condition Operation Order Description Section Parts List Coil Eljre 3N9Z-F Ceramic ECJ0EB1H681K Connector AXK6S30445P Ceramic ECJ0EC1H060C Encoder Trimmer Tantalum ECST1EY474R Ceramic ECJ0EC1H2R5B Accessories Mechanical Parts and DisassemblyChassis Parts AF Unit VCO Unit Logic UnitRF Unit Chassis Parts Name SEMI-CONDUCTOR InformationTransistors and Fets Diodes DUP Board LayoutsTOP View MC1 Microphone SQL PTT Logic unitBottom View SP1 RF Unit RF unit VCO Unit AF UnitEXT.SP EXT.MICREMOTO S253S252 Logic Unit Block Diagram Loop LPF HPF Drive BPF ANT FIL AMP Chassis 11 1 Logic Unit Voltage Diagram IC5 2SK3476 11 2 RF Unit BU4094BCFV 11 3 AF Unit URL 32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan