Icom IC-T90A manual Adjustment Mode Adjustments

Page 23

ADJUSTMENT MODE ADJUSTMENTS (Continued)

•The following adjustment must be performed at “ADJUSTMENT MODE”.

•The adjustment channel indicators (PL, DL, PH, DH, PE, DE) need to change from “DH” channel indicator to use “0” or “.” keys.

 

 

 

 

 

MEASUREMENT

 

 

ADJUSTMENT

ADJUSTMENT

ADJUSTMENT CONDITION

 

VALUE

POINT

 

 

 

 

 

 

 

 

 

UNIT

LOCATION

 

 

UNIT

ADJUST

 

 

 

 

 

 

 

 

 

OUTPUT

11

• Displayed frequency :

Front

LCD display

 

DH = “00”

Top

[DIAL]

POWER

 

(DH ch.)

440.000 MHz

panel

 

 

 

 

panel

 

(11 V 440 MHz

 

• Output power

: Low

 

 

 

 

 

 

 

Low power)

 

• Transmitting

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

12

• Set the channel indicator : “PH”

Side

Connect an amme-

1.1 A

 

[DIAL]

 

 

• Transmitting

 

 

panel

ter between a power

 

 

 

 

 

 

 

 

 

supply

and

the

 

 

 

 

 

 

 

 

 

transceiver.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

13

• Set the channel indicator : “DH”

Top

Connect

an

RF

0.5 W

 

[DIAL]

 

 

• Transmitting

 

 

panel

power meter to the

 

 

 

 

 

 

 

 

 

[ANT] connector.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

14

• Displayed frequency :

Front

LCD display

 

DH = “00”

 

[DIAL]

 

 

(DH ch.)

450.000 MHz

panel

 

 

 

 

 

 

 

 

• Output power

: Low

 

 

 

 

 

 

 

 

 

• Transmitting

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

• Set the channel indicator : “PH”

Side

Connect an amme-

1.1 A

 

[DIAL]

 

 

• Transmitting

 

 

panel

ter between a power

 

 

 

 

 

 

 

 

 

supply

and

the

 

 

 

 

 

 

 

 

 

transceiver.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

16

• Set the channel indicator : “DH”

Top

Connect

an

RF

0.5 W

 

[DIAL]

 

 

• Transmitting

 

 

panel

power meter to the

 

 

 

 

 

 

 

 

 

[ANT] connector.

 

 

 

 

OUTPUT

 

 

 

 

 

 

 

 

 

1

• Displayed frequency :

Top

Connect

an

RF

5.0 W

Top

[DIAL]

POWER

 

(PL ch.)

50.000 MHz

panel

power meter to the

 

panel

 

(8V 50 MHz

 

• Output power

: High

 

[ANT] connector.

 

 

 

 

High power)

 

• Transmitting

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

• Displayed frequency :

 

 

 

 

5.0 W

 

[DIAL]

 

 

(PL ch.)

53.900 MHz

 

 

 

 

 

 

 

 

 

• Transmitting

 

 

 

 

 

 

 

 

 

(8V 144 MHz

 

 

 

 

 

 

 

 

 

3

• Displayed frequency :

Top

Connect

an

RF

5.0 W

Top

[DIAL]

High power)

 

(PL ch.)

144.000 MHz

panel

power meter to the

 

panel

 

 

 

• Output power

: High

 

[ANT] connector.

 

 

 

 

 

 

• Transmitting

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

• Displayed frequency :

 

 

 

 

5.0 W

 

[DIAL]

 

 

(PL ch.)

148.000 MHz

 

 

 

 

 

 

 

 

 

• Transmitting

 

 

 

 

 

 

 

 

 

(8V 440 MHz

 

 

 

 

 

 

 

 

 

5

• Displayed frequency :

Top

Connect

an

RF

5.0 W

Top

[DIAL]

High power)

 

(PL ch.)

440.000 MHz

panel

power meter to the

 

panel

 

 

 

• Output power

: High

 

[ANT] connector.

 

 

 

 

 

 

• Transmitting

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

• Displayed frequency :

 

 

 

 

5.0 W

 

[DIAL]

 

 

(PL ch.)

450.000 MHz

 

 

 

 

 

 

 

 

 

• Transmitting

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5 - 6

Page 22 Page 24
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Page 22 Page 24
Contents IC-t90a Sample Order IntroductionOrdering Parts Repair NotesTable of Contents Transmitter SpecificationsGeneral WFM ReceiverFrequency MHz WFMBottom view Inside ViewsLogic Unit Top viewTop view Bottom view AF UnitRF Unit Removing the rear panel Removing the AF unit Disassembly InstructionsReceiver Circuits Circuit DescriptionRF 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 APC Circuit PLL CircuitsAPC Circuit RF Unit GeneralPLL Circuit VCO Divider Circuit VCO and RF UnitsVoltage Line Power Supply Circuits2 R3V Switch IC AF Unit IC51 Port AllocationsCPU Logic Unit IC1 SEG35 CtselDtcs LCDPreparation Adjustment ProceduresOperation on the Adjustment Mode Operation on the Output Power AdjustmentAD-92SMA ConnectionJIG Voltage Trimmer AdjustmentPLL Lock VCOL19 VCO UnitRF Unit L16 L456Frequency Adjustment Mode AdjustmentsReference DialAdjustment Mode Adjustments PH ch 53.900 MHz Transmitting 8V 145 MHz Displayed frequency Connect an amme 45 a R326 Logic UnitR325 R365Ctcss Tracking DetectorCoil L151 AF UnitCP0 IC151, pin 12 SD lineDisplayed frequency Connect a DC volt Maximum voltage Meter Adjustment Adjustment Condition OperationOrder Description Section Parts ListCoil Eljre 3N9Z-F Ceramic ECJ0EB1H681K Connector AXK6S30445P Ceramic ECJ0EC1H060C Encoder Trimmer Tantalum ECST1EY474R Ceramic ECJ0EC1H2R5B Chassis Parts Mechanical Parts and DisassemblyAccessories AF Unit VCO Unit Logic UnitRF Unit Chassis PartsName SEMI-CONDUCTOR InformationTransistors and Fets DiodesDUP Board LayoutsTOP View MC1 MicrophoneSQL PTT Logic unitBottom View SP1RF Unit RF unit EXT.SP EXT.MICREMOTO AF UnitVCO Unit S253S252 Logic Unit Block DiagramLoop LPF HPF Drive BPF ANT FIL AMP Chassis11 1 Logic Unit Voltage DiagramIC5 2SK3476 11 2 RF UnitBU4094BCFV 11 3 AF UnitURL 32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan
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