Icom IC-PW1 - Service Manual

Other manuals for Icom IC-PW1

Service Manual Addendum201 pages

Instruction Manual24 pages

Questions and Answers

C
Cynthia KramerJul 31, 2025
Why is the output power too low on my Icom Amplifier?
- T
  Taylor ScottJul 31, 2025
  There could be several reasons for low output power: 1. Check that the antenna input and output are connected properly. 2. Ensure that the [ALC adj] is correctly adjusted. 3. Verify the linear amplifier circuit is turned ON by pushing [AMP/PROTECT] (the indicator should be green). 4. Make sure you've selected an antenna suitable for the operating frequency. 5. Tune the antenna manually by pushing [TUNER] for 2 seconds. 6. If the protection circuit activates and a band indicator blinks, stop the exciter’s transmission, then push [AMP/PROTECT] to deactivate the protection circuit.
H
Helen HallAug 5, 2025
What to do if the protection circuit activates frequently on my Icom Amplifier?
- J
  Joy JosephAug 5, 2025
  If the protection circuit activates during short periods of operation, consider the following: * Check that the antenna SWR is not more than 3:1. Adjust the antenna if needed. * Ensure the antenna tuner is turned ON by pushing [TUNER]. * Make sure the amplifier has good air circulation. * Verify that the [ALC adj] is properly adjusted.
T
Tiffany SalinasAug 12, 2025
How to fix low sensitivity on Icom Amplifier?
- J
  Jonathan BriggsAug 12, 2025
  Low sensitivity can occur due to: * The antenna not being connected properly. Reconnect the antenna connector. * Selecting an antenna for another band. Choose an antenna suitable for the operating frequency. * The antenna not being properly tuned. Manually tune the antenna by pushing [TUNER] for 2 seconds.
P
Paul NguyenAug 18, 2025
What to do if Icom Amplifier power does not come on?
- B
  Bruce MorrisAug 18, 2025
  If the power does not come on when you push the [POWER] switch: * Check the cable connection and connection cable pins for any faults. * Check if the circuit breaker is turned OFF. If it is, determine the cause and then turn the circuit breaker ON.
J
jeremysimmonsAug 25, 2025
Why isn't the operating band changing automatically on my Icom Amplifier?
- C
  Christina RayAug 25, 2025
  If the operating band does not change automatically, it could be due to: * A faulty cable connection. Check the connection and connection cable pins. * An improperly programmed CI-V setting. Set the CI-V address correctly.

Summary

IC-PW1 Specifications

General Specifications

Covers frequency range, duty cycle, connectors, power, dimensions, and weight.

Linear Amplifier Specifications

Details output power, driving power, and spurious emissions.

Antenna Tuner Specifications

Specifies output matching range, tuning accuracy, input power, and insertion loss.

Circuit Description

Linear Amplifier Circuits

Explains exciter input, power splitter, amplifier, combiner, and filter circuits.

Antenna Tuner Circuits

Details matching, detector, and motor control circuits for the tuner.

Protection Circuits

Covers general protection, ALC, and driving power detection circuits.

Temperature Detector Circuit

Describes the heatsink temperature detection and control mechanism.

Driving Frequency Detector Circuit

Explains input power level detection for frequency band selection.

Power Supply Circuits

Lists various voltage lines and their descriptions within the unit.

Port Allocations

Details pin assignments for expander ICs and shift registers.

Adjustment Procedures

Preparation for Adjustment

Lists required test equipment and connection setup for adjustments.

PA and Front Unit Adjustment

Outlines procedures for adjusting idling current and meter maximum points.

Main Unit Adjustment

Details adjustments for SWR detector, tuner basis voltage, and power settings.

Semi-Conductor Information

Transistor and FET Information

Lists transistors and FETs with their symbols and inside views.

Diode Information

Lists diodes with their symbols and inside views.

Board Layouts

ANT-SW Unit Board Layout

Shows the layout and connections for the ANT-SW board.

C-NET Board Layout

Displays the layout and connections for the C-NET board.

L-NET Board Layout

Shows the layout and connections for the L-NET board.

H-NET Board Layout

Displays the layout and connections for the H-NET board.

Splitr Unit Board Layout

Shows the layout and connections for the SPLITR unit.

PA Unit Board Layout

Displays the layout and connections for the PA unit.

Main Unit Board Layout

Shows the layout and connections for the MAIN unit.

Block Diagram

Voltage and Wiring Diagrams

Overall Wiring Diagram

Overall wiring diagram connecting various units and signals.

Splitter, PA, and Combiner Units Diagrams

Detailed circuit diagram for splitter, PA, and combiner units.

Filter Unit Circuit Diagram

Circuit diagram for the filter unit, showing band-specific filters.

PA Unit Circuit Diagram

Circuit diagram detailing the power amplifier units.

Front Unit Circuit Diagram

Circuit diagram for the front unit, including controls and indicators.

Main Unit Circuit Diagram

Circuit diagram for the main unit, showing complex control and processing logic.

Tuner Unit Circuit Diagram

Circuit diagram for the tuner unit, including antenna switching and tuning control.

Icom IC-PW1 Specifications

General

Tuning Method	Automatic
Input Impedance	50 Ω
IMD	Less than -30 dB
Type	HF Linear Amplifier
Frequency Range	1.8-30 MHz
Power Output	1000 W PEP
Input Power	100 W
Power Supply	AC 100 V
Mode	SSB, CW, AM, FM
Cooling	Forced Air Cooling