Westcott FJ400 User manual



FJ400 AC/DC Strobe

User Manual



V1.0000

10/22/2019

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Contents
Introduction 3
Components (Included) 3
FJ400 Strobe: Overview 4
FJ400 Strobe: LCD Display & Menus 5
FJ400 Strobe: Warnings 6
FJ400 Strobe: Firmware Updates 7
Installing the Firmware 7
FJ400 Strobe: Getting Started 8
Charging the FJ400 AC/DC Lithium Polymer Battery 8
Attaching the FJ400 AC/DC Lithium Polymer Battery 8
Removing the FJ400 AC/DC Lithium Polymer Battery 8
AC Power Operation 8
DC Power Operation 8
FJ400 Strobe: Mounting 9
Mounting to a Light Stand 9
FJ400 Strobe: Attaching & Removing Modifiers 9
Connecting a Bowens Speedring & Modifier 9
Removing a Bowens Speedring & Modifier 9
Attaching an Umbrella-Based Modifier 9
Removing an Umbrella Based Modifier 9
FJ400 Strobe: Wireless Control 10
FJ400 Strobe: Exposure Modes 10
Enabling ‘TTL’ Mode Operation [Requires FJ2-Xm or compatible trigger] 10
Enabling ‘Manual’ Mode Operation 10
FJ400 Strobe: SYNC Functions 11
Enabling ‘Normal’ Sync 11
Enabling ‘HSS (High-speed Sync)’ 11
Enabling ‘Freeze Sync’ 11
Freeze Sync Flash Durations 11
FJ400 Strobe: Advanced Functions 12
Mask Function 12
Delay Function 13
Continuous Capture 13
FJ400: Menu [Expanded Look] 13
1

Menu Screen #1 13
Menu Screen #2 14
Menu Screen #3 14
Menu Screen #4 14
Menu Screen #5 14
Menu Screen #6 15
FJ400 Battery: Performance and Care 15
FJ400 Performance & Sleep Modes 15
FJ400 LED Battery Status Indicators 15
FJ400 Charging & Life Expectancy 16
FJ400 Strobe: Technical Specifications 16
Warranty Information 18
Legal Information 19
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2

Introduction

Thank you for purchasing the Westcott FJ400 Strobe. The FJ400 and FJ-X2m Wireless Flash Trigger

(sold separately



) are a photographer’s dream combination. The performance of the FJ400 is one of the

industry’s first compact, portable 400 watt-second strobes that is capable of recycling in less than

one-second at full-power so you don’t miss the shot. It offers the most full-power flashes at 480 bursts to

extend those on-location shoots when AC power isn’t an option and it has accurate color temperatures

throughout its entire 9-stop output range. When paired with the FJ-X2m Wireless Radio trigger, you can

say, “Goodbye,” to the need for multiple brand-specific triggers. The FJ400 and FJ-X2m have you

covered with its multi-brand compatibility. This versatile unit offers everything required by professional

photographers today to achieve lighting success - including TTL, HSS, Continuous Capture, Freeze

Function, and so much more. Enjoy!

Components (Included)

●FJ400 Strobe

●FJ400 AC/DC Lithium Polymer Battery

●AC Power Adapter & Cord

●Frosted Diffusion Dome

●Magnetic Reflector (Bowens, 5.5")

●Magnetic CC Gel Set

●Magnetic Diffusion

●USB-C to USB-A Cable

●Rapid Box Switch Insert (Bowens)



 

3

FJ400 Strobe: Overview



4

FJ400 Strobe: LCD Display & Menus



5

FJ400 Strobe: Warnings

Caution

●IMPORTANT: During operation, the flash tube, LED modeling lamp, and select components of

the FJ400 strobe temperatures will increase. Please use caution while using to avoid serious

burns or injuries.

●Use only with the Westcott FJ400 AC/DC Lithium Polymer Battery and/or AC Power Adapter and

Cord.

●Do not touch glass diffusion dome, flash tube, LED modeling lamp, or metal reflector after

immediate use to avoid potential injury.

●Never leave unattended around children and/or pets.

●Keep away from fire, water, and moisture.

●Do not submerge in water.

●Avoid drastic temperature changes before, during, or after use.

●Avoid direct skin contact with the flash tube and LED modeling lamp when replacing the flash

tube.

●Always remove the FJ400 AC/DC Lithium Polymer Battery from the FJ400 Strobe during

travel/storage to avoid accidental operation which could lead to overheating or permanent

damage.

●Do not overtighten tilter bracket tension knob or umbrella tension screw.

●Ensure the FJ400 is securely mounted before use.

●Only use compatible modifiers and accessories and ensure they are securely attached to the

FJ400 Strobe before use.

●Do not attempt to modify any Westcott products. Contact Westcott for assistance.

●The operating temperature range is 32-104°F(0-40°C).



Dual-Stage Heat Protection

The FJ400 is equipped with self-monitoring cooling fans to ensure safe operation. It is also equipped

with an automatic shutoff feature. In the rare event that the strobe has reached an unsafe operating

temperature, the screen will display OH (overheat). Once the unit has cooled, the OH will disappear from

the screen and it will then be safe to continue operation.

 

6

FJ400 Strobe: Firmware Updates

The FJ400 strobe is designed with a USB-C port to allow for firmware updates only. Future firmware

updates will result in performance enhancements, modified menu options, and improved menu layouts. It

is strongly suggested that you visit fjwestcott.com/4700 to confirm your strobe has the latest firmware.

Installing the Firmware

1. Visit fjwestcott.com/4700 and scroll to the Support section. Find and download the latest

firmware ZIP file.

2. Unzip the file and open the extracted folder.

3. Read the Changelog file.

4. Save the .BIN file to your computer.

5. Ensure the FJ400 is off and cooled before removing the battery from the strobe.

6. Connect the USB-C cable to the FJ400 and then to your computer.

7. Common operating systems will present the strobe as an external drive device.

8. Locate the firmware file on your computer and drag the file to the FJ400 (external device).

9. Once the file has been completely copied to the FJ400, eject the FJ400 from the computer.

10. Remove the USB-C cable from the FJ400 and reattach the battery.

11. Press the power button on the FJ400 to initiate the firmware update.



IMPORTANT

●It’s recommended that the firmware update installation process be completed only when the

connected computer’s power level is ≥ 50%. Loss of power of any type during this process could

render the FJ400 inoperable and require professional repair.

●Removing the USB-C cable from the FJ400 without properly ejecting the FJ400 from your

computer could render the strobe inoperable and require professional repair.

●Depending on the operating system and the applications running, copying the firmware from your

computer to the FJ400 may take a few minutes and/or halt the copying process. Should this

happen, close the copy progress window and try again. Further copying issues may require the

computer to be restarted.

 

7

FJ400 Strobe: Getting Started

Charging the FJ400 AC/DC Lithium Polymer Battery

The battery can be charged separate of the FJ400 or while attached to the FJ400. In both instances,

connect the power cord to the AC Adapter, connect the AC Adapter’s barrel plug to the battery AC

receptacle, and connect the power cord into a power outlet.

Attaching the FJ400 AC/DC Lithium Polymer Battery

Attach the FJ400 Battery to the strobe by aligning the silver connection points on the rear of the strobe

to the holes on the silver strips located on the back of the battery and slide the battery down until it locks

into place.

Removing the FJ400 AC/DC Lithium Polymer Battery

Ensure the FJ400 is OFF by long-pressing the Power | Model button until the LCD screen turns off. Then,

slide the release lock located on top of the battery away from the strobe, gently press the battery up and

away from the strobe to remove.

AC Power Operation

1. Ensure the battery charge level is ≥ 25%.

2. Ensure the battery is securely attached to the FJ400.

3. Plug the power cord into the AC Adapter.

4. With the strobe powered off, connect the AC Adapter’s barrel plug to the battery’s AC receptacle.

5. Plug the power cord into a dedicated power outlet.

6. Turn the strobe ON by pressing and holding the Power | Model button until the start-up screen

appears.

DC Power Operation

1. Ensure the FJ400 battery has been fully charged.

2. Ensure the battery is securely attached to the FJ400.

3. Turn the strobe ON by pressing and holding the Power | Model button until the start-up screen

appears.



 

8

FJ400 Strobe: Mounting

Mounting to a Light Stand

1. Rotate the tilter bracket’s handle counterclockwise until the light stand receptacle is

perpendicular to the strobe body.

2. Loosen the tension knob located lower on the tilter bracket.

3. Insert the light stand spigot into the FJ400’s 5/8"-16 mm tilter bracket receptacle.

4. Tighten the tension knob to secure the strobe to the light stand.

FJ400 Strobe: Attaching & Removing Modifiers

Connecting a Bowens Speedring & Modifier

1. Ensure the strobe is turned OFF and has cooled for five minutes.

2. Grasp the speedring attached to the modifier and align its three square mounting blocks with the

openings located on the face of the strobe.

3. Insert the speedring and turn clockwise until the speedring locks into place.

Removing a Bowens Speedring & Modifier

1. Ensure the strobe is turned OFF and has cooled for five minutes.

2. Grasp the speedring attached to the modifier.

3. Slide the strobe’s speedring release away from the modifier.

4. Rotate the modifier’s speedring counterclockwise until its three square mounting blocks align

with the openings. Pull the modifier away from the strobe to release.

Attaching an Umbrella-Based Modifier

1. Ensure the strobe is turned OFF and has cooled for five minutes.

2. Grasp the umbrella’s shaft and slide into the strobe’s umbrella receptacle.

3. Tighten the tension screw to secure the umbrella-based modifier (up to 8mm shaft).

Removing an Umbrella Based Modifier

1. Ensure the strobe is turned OFF and has cooled for five minutes.

2. Loosen the umbrella tension screw.

3. Grasp the umbrella’s shaft and gently slide the umbrella out of the FJ400 umbrella receptacle.



NOTE:

●Never force entry or removal of speedring, umbrellas, or modifiers.

●Use caution during the removal of modifiers to not damage the flash tube.

●Octagonal umbrella shaft may not fit into the FJ400 umbrella receptacle.

9

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