Icom IC-T90A manual Url

Page 56

1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan

Phone :

06 6793 5302

Fax

:

06 6793 0013

URL

:

http://www.icom.co.jp/world/index.html

<Corporate Headquarters>

Communication Equipment

2380 116th Avenue N.E., Bellevue, WA 98004, U.S.A.

Himmelgeister Str. 100, D-40225 D sseldorf, Germany

Phone : (425) 454-8155

Fax : (425) 454-1509

Phone : 0211 346047

Fax : 0211 333639

URL

: http://www.icomamerica.com

URL

: http://www.icomeurope.com

<Customer Service>

 

 

 

 

Phone : (425) 454-7619

 

 

 

 

 

 

 

 

 

 

 

Crta. de Gracia a Manresa Km. 14,750

 

 

 

08190 Sant Cugat del Valles Barcelona, SPAIN

 

 

 

Glenwood Centre #150-6165

Phone : (93) 590 26 70

Fax : (93) 589 04 46

URL

: http://www.icomspain.com

Highway 17 Delta, B.C., V4K 5B8, Canada

 

 

 

Phone : (604) 952-4266

Fax : (604) 952-0090

 

 

 

URL

: http://www.icomcanada.com

 

 

 

 

 

 

A.B.N. 88 006 092 575

290-294 Albert Street, Brunswick, Victoria, 3056, Australia

Phone : 03 9387 0666 Fax : 03 9387 0022

URL : http://www.icom.net.au

146A Harris Road, East Tamaki, Auckland, New Zealand

Phone : 09 274 4062 Fax : 09 274 4708

URL : http://www.icom.co.nz

Unit 9, Sea St., Herne Bay, Kent, CT6 8LD, U.K. Phone : 01227 741741 Fax : 01227 741742 URL : http://www.icomuk.co.uk

Zac de la Plaine, Rue Brindejonc des Moulinais BP 5804, 31505 Toulouse Cedex, France Phone : 561 36 03 03 Fax : 561 36 03 00 URL : http://www.icom-france.com

6F No. 68, Sec. 1 Cheng-Teh Road,

Taipei, Taiwan, R.O.C.

Phone : (02) 2559 1899 Fax : (02)

2559 1874

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Contents IC-t90a Introduction Ordering PartsRepair Notes Sample OrderTable of Contents Transmitter SpecificationsGeneral Receiver Frequency MHzWFM WFMInside Views Logic UnitTop view Bottom viewTop view Bottom view AF UnitRF Unit Disassembly Instructions Removing the rear panel Removing the AF unitCircuit Description Receiver CircuitsRF Circuit 4 1ST Mixer and 1ST if Circuits RF, AF and VCO Units5 2ND if and Demodulator Circuits AF Unit 2ND if and Demodulator Circuit AF Amplifier Circuit AF UnitSquelch Circuitaf and Logic Units Transmitter Circuits PLL Circuits APC Circuit RF UnitGeneral APC CircuitVCO Divider Circuit VCO and RF Units PLL CircuitPower Supply Circuits 2 R3V Switch IC AF Unit IC51Port Allocations Voltage LineCPU Logic Unit IC1 Ctsel DtcsLCD SEG35Adjustment Procedures Operation on the Adjustment ModeOperation on the Output Power Adjustment PreparationAD-92SMA ConnectionJIG Trimmer Adjustment PLL LockVCO VoltageVCO Unit RF UnitL16 L456 L19Adjustment Mode Adjustments ReferenceDial FrequencyAdjustment Mode Adjustments PH ch 53.900 MHz Transmitting 8V 145 MHz Displayed frequency Connect an amme 45 a Logic Unit R325R365 R326Ctcss Tracking DetectorCoil AF Unit CP0IC151, pin 12 SD line L151Displayed frequency Connect a DC volt Maximum voltage Adjustment Adjustment Condition Operation MeterSection Parts List Order DescriptionCoil Eljre 3N9Z-F Ceramic ECJ0EB1H681K Connector AXK6S30445P Ceramic ECJ0EC1H060C Encoder Trimmer Tantalum ECST1EY474R Ceramic ECJ0EC1H2R5B Chassis Parts Mechanical Parts and DisassemblyAccessories Logic Unit RF UnitChassis Parts AF Unit VCO UnitSEMI-CONDUCTOR Information Transistors and FetsDiodes NameBoard Layouts TOP ViewMC1 Microphone DUPLogic unit Bottom ViewSP1 SQL PTTRF Unit RF unit EXT.SP EXT.MICREMOTO AF UnitVCO Unit S253S252 Block Diagram Logic UnitChassis Loop LPF HPF Drive BPF ANT FIL AMPVoltage Diagram 11 1 Logic UnitIC5 11 2 RF Unit 2SK347611 3 AF Unit BU4094BCFVURL 32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan
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