Icom IC-T90A manual Connect an amme 45 a

Page 25

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

1

• Displayed frequency :

Side

Connect an amme-

0.45 A

Top

[DIAL]

POWER

 

(PE ch.)

50.000 MHz

panel

ter between a power

 

panel

 

(5V 50 MHz)

 

• Output power

: Low

 

supply

and

the

 

 

 

 

 

• Transmitting

 

 

 

transceiver.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

• Displayed frequency :

 

 

 

 

0.45 A

 

[DIAL]

 

 

(PE ch.)

53.900 MHz

 

 

 

 

 

 

 

 

 

• Transmitting

 

 

 

 

 

 

 

 

 

(5V 145 MHz)

 

 

 

 

 

 

 

 

3

• Displayed frequency :

Front

LCD display

 

DE = “00”

Top

[DIAL]

 

 

(DE ch.)

144.000 MHz

panel

 

 

 

 

panel

 

 

 

• Output power

: Low

 

 

 

 

 

 

 

 

 

• Transmitting

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

• Set the channel indicator : “PE”

Side

Connect an amme-

0.40 A

 

[DIAL]

 

 

• transmitting

 

 

panel

ter between a power

 

 

 

 

 

 

 

 

 

supply

and

the

 

 

 

 

 

 

 

 

 

transceiver.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

• Set the channel indicator : “DE”

 

 

 

 

0.45 A

 

[DIAL]

 

 

• Transmitting

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

• Displayed frequency :

Front

LCD display

 

DE = “00”

Top

[DIAL]

 

 

(DE ch.)

148.000 MHz

panel

 

 

 

 

panel

 

 

 

• Output power

: Low

 

 

 

 

 

 

 

 

 

• Transmitting

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

• Set the channel indicator : “PE”

Side

Connect an amme-

0.40 A

 

[DIAL]

 

 

• transmitting

 

 

panel

ter between a power

 

 

 

 

 

 

 

 

 

supply

and

the

 

 

 

 

 

 

 

 

 

transceiver.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8

• Set the channel indicator : “DE”

 

 

 

 

0.45 A

 

[DIAL]

 

 

• Transmitting

 

 

 

 

 

 

 

 

 

(5V 440 MHz)

 

 

 

 

 

 

 

 

9

• Displayed frequency :

Front

LCD display

 

DE = “00”

Top

[DIAL]

 

 

(DE ch.)

440.000 MHz

panel

 

 

 

 

panel

 

 

 

• Output power

: Low

 

 

 

 

 

 

 

 

 

• Transmitting

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

• Set the channel indicator : “PE”

Side

Connect an amme-

0.35 A

 

[DIAL]

 

 

• transmitting

 

 

panel

ter between a power

 

 

 

 

 

 

 

 

 

supply

and

the

 

 

 

 

 

 

 

 

 

transceiver.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

11

• Set the channel indicator : “DE”

Front

LCD display

 

DE = “60”

 

[DIAL]

 

 

• Transmitting

 

 

panel

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

12

• Displayed frequency :

Front

LCD display

 

DE = “00”

Top

[DIAL]

 

 

(DE ch.)

450.000 MHz

panel

 

 

 

 

panel

 

 

 

• Output power

: Low

 

 

 

 

 

 

 

 

 

• Transmitting

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

13

• Set the channel indicator : “PE”

Side

Connect an amme-

0.35 A

 

[DIAL]

 

 

• transmitting

 

 

panel

ter between a power

 

 

 

 

 

 

 

 

 

supply

and

the

 

 

 

 

 

 

 

 

 

transceiver.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

14

• Set the channel indicator : “DE”

Front

LCD display

 

DE = “60”

 

[DIAL]

 

 

• Transmitting

 

 

panel

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5 - 8

Image 25
Contents IC-t90a Ordering Parts IntroductionRepair Notes Sample OrderTable of Contents General SpecificationsTransmitter Frequency MHz ReceiverWFM WFMLogic Unit Inside ViewsTop view Bottom viewRF Unit AF UnitTop view Bottom view Removing the rear panel Removing the AF unit Disassembly InstructionsReceiver Circuits Circuit Description5 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 RF Unit PLL CircuitsGeneral APC CircuitPLL Circuit VCO Divider Circuit VCO and RF Units2 R3V Switch IC AF Unit IC51 Power Supply CircuitsPort Allocations Voltage LineCPU Logic Unit IC1 Dtcs CtselLCD SEG35Operation on the Adjustment Mode Adjustment ProceduresOperation on the Output Power Adjustment PreparationJIG ConnectionAD-92SMA PLL Lock Trimmer AdjustmentVCO VoltageRF Unit VCO UnitL16 L456 L19Reference Adjustment Mode AdjustmentsDial FrequencyAdjustment Mode Adjustments PH ch 53.900 MHz Transmitting 8V 145 MHz Displayed frequency Connect an amme 45 a R325 Logic UnitR365 R326Ctcss Coil DetectorTracking CP0 AF UnitIC151, pin 12 SD line L151Displayed 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 Accessories Mechanical Parts and DisassemblyChassis Parts RF Unit Logic UnitChassis Parts AF Unit VCO UnitTransistors and Fets SEMI-CONDUCTOR InformationDiodes NameTOP View Board LayoutsMC1 Microphone DUPBottom View Logic unitSP1 SQL PTTRF Unit RF unit VCO Unit AF UnitEXT.SP EXT.MICREMOTO 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