Icom IC-F7000 service manual PA and Filter Units Adjustment

Page 26

5-3 PA AND FILTER UNITS ADJUSTMENT

ADJUSTMENT

ADJUSTMENT CONDITIONS

MEASUREMENT

VALUE

ADJUSTMENT

UNIT

LOCATION

UNIT

ADJUST

IDLING

1

• Operating frequency

: 12.2350 MHz

Rear

Connect

an ammeter

2.0 A

PA

R6304

CURRENT

• Mode

: J3E

panel

(10 A) between an

(For drive

• Apply no audio signal to the [MIC] con-

external power supply

FETs)

nector.

and the transceiver.

• Disconnect J6702.

• Preset R6304 and R6412 on the PA

unit to max. counter clockwise.

• Preset R6515 on the PA unit to max.

clockwise.

• Connect a dummy load or RF power

meter to the [ANT] connector.

• Transmitting

(For final

2

• Transmitting

0.7 A

R6412

transistors)

• After adjustment, connect J6701 to the PA unit.

SWR

1

• Operating frequency

: 22.0000 MHz

Rear

Connect an RF power

90 W

Audio

Output

DETECTOR

• Mode

: J3E

panel

meter to

the

[ANT]

gen-

level

• Connect the CP7332 (FOR line) on

connector.

erator

the FILTER unit to ground.

2

• Connect an audio

generator to the

FIL-

Connect

a DC

volt-

Minimum level

FIL-

C7275

[MIC] connector and set as:

TER

meter to

the

check

TER

Frequency

: 1.5 kHz

point, CP7331.

Level

: OFF

• Transmitting

• After adjustment, disconnect CP7332 (FOR line) on the FILTER unit from ground.

5 - 5

Image 26

Contents Service Manual AUS IntroductionOrdering Parts Repair Notes OTHTable of Contents Specifications RC-26 Remote Controller ‘ General SP-25 External Speaker ‘ GeneralUnit mm inch 37 1 15 Section Inside Views RC-26IC-F7000 TOP View IC-F7000 Bottom ViewAbout External Reference Signal Input ‘ in Case of Using External Reference Signal‘ in Case of Using Internal Reference Signal ‘ ConnectionDSP Unit Circuit DescriptionReceiver Circuits DSP Circuit DSP Receiver Circuit Main and DSP UnitsAGC Circuit DSP and Main Units AF Amplifier Circuit DSP and Main UnitsTransmitter Circuits RF Filter Circuit RF Circuit MAIN, PA, PLL Units and DRIVER Board PLL Circuits LCD Circuit Display and Connect Boards Reset Circuit Display Board3 2ND LO and Reference Oscillator Circuits PLL Unit Microphone Circuit Display BoardDisplay Board RC-26 Voltage Line Power Supply CircuitsPA Unit Voltage Line PLL Unit Voltage LineOutput Expander IC for the PLL Unit Main Unit IC3602 Port AllocationsOutput Expander IC for the PLL Strobe Main Unit IC3601 6 D/A Converter IC Main Unit IC3606 Output Expander IC for Bandpass FIL- Ters Main Unit IC3604Output Expander IC Main Unit IC3603 Front CPU Port Allocations RC-26, Display Board IC8201 Required Test Equipment Adjustment ProceduresPreparation ConnectionEntering the Adjustment Mode Operating on the Adjustment ModePLL PLL Unit AdjustmentLPL Lock VoltagePLL Unit TOP View PA and Filter Units Adjustment PA Unit TOP View PLL Unit Bottom ViewReceiver Adjustments RC-26 Front Panel L209 PresettingMain Unit TOP View Transmitter Adjustments IC-APC VOL DialSection Parts List Main UnitMain Board Resistor ERJ3GE JPW Resistor ERJ12YJ0R00U R3332 7030003640 ECEV1CA471P Tantalum ECST1AY335R PLL Unit ADM202EARNResistor ERA3YEB Mylar PA Unit DSP Unit DSP Board VARISTOR-2 Board Driver BoardVARISTOR-1 Board Front Unit Display BoardConnect Board Rear BoardHM-146 Main Unit Chassis Parts Mechanical Parts and DisassemblyFront Parts MIC UnitAccessries Connect Board AccessoriesFront Parts DS DSP Board Chassis PartsMIC Unit DR Driver BoardDiodes SEMI-CONDUCTOR InformationTransistor and FET’S Connect Board TOP View Board LayoutsTOP View Rear Board TOP ViewBottom View MIC Unit Bottom View Connect Board Bottom View Rear BoardDisplay Board TOP View Bottom View Display Board DSP Board TOP View Bottom View DSP Board J9901 J9902J2051 Bottom View Main Unit PA Unit Bottom View PA Unit PLL Unit Bottom View PLL Unit Driver Board TOP View VARISTOR-1 Board Bottom View Driver Board Section Block Diagram Voltage Line TX Line RX Line Common LineWiring Diagram IC-F7000Voltage Diagrams 12-1 RC-26 and HM-146Main Unit Explanatory notes Main PA Unit PLL Unit JPW-ERJ3GE DSP Board