Categories: viewtech

viewtech VJ-3 3.9mm Video Borescope User Manual

viewtech VJ-3 3.9mm Video Borescope


Please read this user manual carefully before operation.


  1. Do not use or store in a place with explosives, a strong magnetic field or combustible gas.
  2. Unauthorized dismantling or modification of this borescope voids the warranty.
  3. Make sure the power is turned off before putting the instrument into the carrying case.
  4. Never touch the lens/LED module during or immediately after use. Contact may cause burns.
  5. If smoke or abnormal noise is detected, stop using and turn off the borescope immediately.
  6. Do not look directly look at the light from the end of the insertion tube. It is extremely bright and can cause eye damage.
  7. If any abnormality is noticed during operation, stop using and turn off the borescope immediately.


  1. Only use this borescope within the approved operating temperature range.
  2. DO NOT over-torque, bend, twist, or fold the insertion tube. Doing so could damage the articulation control wire assemblies and/or electrical wiring.
  3. Only use the power adapter provided by ViewTech.
  4. DO NOT yank or attempt to forcefully remove the insertion tube if it becomes stuck inside the equipment being borescoped. When extracting the insertion tube from the inspection area:
    a. Be sure that the bending section (distal tip of the insertion tube) is straight. Use the joystick to remove any angle before attempting removal.
    b. If the insertion tube becomes stuck during removal, gently rotate the joystick until it becomes loose again.
  5. After use, center the joystick in order to straighten the bending section prior to storage. The borescope should always be stored with the bending section straight (do not force the bending section with your fingers – always use the joystick to adjust and straighten the bending angle.)
  6. NOTE the following regarding the tip of the insertion tube, which is the most delicate part of this video borescope:
    a. Do not impact the tip of the insertion tube while inserting or maneuvering inside the equipment being borescoped.
    b. Manipulate the joystick gently. Rapid movement of the joystick while borescoping may cause abrupt impact with the machinery and result in damage to the camera/LED module.
  7. If the lens is dirty or greasy, it may be cleaned by wiping with alcohol.
  8. DO NOT force the joystick! If there is unusual resistance to joystick movement while conducting an inspection, it is because there is physical resistance inside the inspection area. Trying to force the joystick in this situation will result in damage to the articulation control wires, the joystick assembly or to the equipment being inspected.
  9. DO NOT impact, press or scratch the LCD monitor.
  10. DO NOT cover the unit with a plastic bag or other similar protective covering during use. It may cause the unit to overheat and damage the internal circuitry.
  11. DO NOT use or store the borescope in a high temperature, high humidity or high radiation environment.


Follow the instructions below for battery care and proper charging, to prevent leakage, overheating, smoke, explosion, electric shock and burns.


  1. Only use batteries and chargers specially designed for this borescope: 18650B battery with PCB-protection (button top).
  2. Be sure the battery is placed into the slot in the correct direction (+ /–).
  3. Do not carry or store the battery where it may collide with metal objects.
  4. Always keep the batteries away from fire or other sources of intense heat, as it will cause an explosion.
  5. Do not attempt to open or modify batteries, as this could lead to an explosion or fire.
  6. Do not immerse the battery in liquid of any kind.
  7. Do not charge the battery near an open flame, as it could lead to an explosion or fire.
  8. Do not drop, puncture, impact or apply pressure to the battery as it could lead to an explosion or fire.


  1. Use only 3.6V lithium batteries, model 18650B with PCB-protection (button top).
  2. Submit a repair request immediately in case of battery leakage, discoloration, deformation or abnormal condition.
  3. Clean immediately with tap water if your skin or clothing comes into contact with a leaking battery.
  4. Keep the battery charger free of any covering during charging.
  5. Do not charge the battery in the vicinity of flammable gas or materials.


  1. Do not use or store the battery or borescope in a high-temperature environment, such as direct sunlight, closed cars or near heating equipment.
  2. The battery will heat up during prolonged operation. Do not remove immediately after use, as this could cause burns.
  3. Keep battery and borescope out of the reach of children.
  4. Do not touch the battery electrodes with wet hands.
  5. Fully charge the battery before use and after extended use.
  6. Remove the battery from the borescope if the scope will not be used for more than 30 days, otherwise, it may cause damage to the borescope, fire or personal injury.


  1. This is a high-output battery. Please use the battery properly or it may cause damage from leakage or excessive heat. Always check the orientation/polarity and load it into the chamber correctly.
  2. Battery performance will decrease as the ambient temperature drops. Performance will be restored once the ambient temperature rises.
  3. Recycle the battery in accordance with the local regulations at the end of its useful life.
  4. Recommended temperature range for this lithium ion battery is:
    Discharging (in use): 0°C to 40°C (32°F to 104°F)
    Charging: 0°C to 40°C (32°F to 104°F)
    Storage: -10°C to 50°C (14° to 122°F)
  5. Using, charging, or storing the battery at a temperature out of the above range will reduce the battery’s performance and service life.
  6. Be sure to remove the battery from the borescope for long term storage.


Insertion Tube Outer Diameter
Exterior Material
Chemical Compatibility
Articulation Range
Optics Field of View
Depth of Field
Illumination Method
Illumination Output
Base Unit Display Monitor
Articulation Control
Joystick Lock
Brightness Control
Stand-by Time
Display Resolution
Internal storage
Data I/O ports
Operating Method
Menu Functions and Options User Interface
File Management
Image Control
Image Format
Video Format
Angle of Bend
Operating Limits Run Time
Operating Temp. Base Unit
Operating Temp. Insertion Tube
Recommended Storage Temp.
Protection Grade
2.2mm 2.8mm 3.9mm 6.0mm
1.0m, 1.5m 1.0m, 2.0m 1.5m, 1.5m ST,3.0m,
3.0m ST
1.5m, 3.0m, 5.0m, 8.0m
Tungsten Easy Glide, crush-resistant
Water, machine oil, heating oil, diesel, 3.5% saline concentrate


360° around, 140±10° backward 360° around, 180±10° backward 360° around, 160±10° backward
120° ± 10° 84° x 84° 90° x 72°: 120° 80° x 60°: 100°
3.0mm – 50.0mm
4 Super high-intensity white LEDs 6 Super high-intensity white LEDs
≤ 4,000lux ≤ 6,000lux ≤ 20,000lux
3.5’’ IPS anti-glare LCD
Thumb-actuated mechanical 360° Omni-directional rocker
Manual reset/Auto reset
6-step LED brightness adjustment
Photo taking, video recording, brightness adjustment
5 hours
640 x 480 640 x 480
(Short Tip) 400×400)
640 x 480
16 GB SD Card | 10,000 photos, 8 hours video
SD card, HDMI out, micro-USB
One 18650 Li-ion battery
One handed, portable
13.0” x 12.0” x 4.5”
2.2 lbs. / 1.0 kg
Drop down operating menu
Photo and video recording, playback, thumbnail preview, delete, card formatting
Image rotation, live freeze, zoom in/out
JPEG/JPG/PNG (optional date and time stamp)
AVI (optional date and time stamp)
Upgrade via SD card
120 – 180°C
English (En), Spanish (Es), French (Fr)
≤ 2.5 Hours ≤ 4 Hours
14 – 122°F (-10 – 50°C)
-4 – 140°F (-20 – 60°C)
14 – 104°F (-10 – 40°C)


1 VJ-3 video borescope
2 18650 Li-ion battery (1 plus spare)
3 18650 Li-ion battery charger
4 Micro USB cable
5 AC power adapter
6 Mini HDMI to HDMI cord
7 16GB SD card + card case
8 SD card reader
9 User manual


The VJ-3 mechanical articulating video borescope is a nondestructive visual testing instrument with integrated optics, illumination, image processing and joystick-actuated steering. It is used for the remote visual inspection of machinery, equipment and components. The VJ-3 facilitates the visual recording and photo documentation of an inspection of parts and areas of vital equipment that are otherwise inaccessible or that would require great effort and expense to access directly. The VJ-3 consists of two modules integrated into one system: the insertion tube with distally mounted camera/ LEDs, and the base unit with control panel, LCD monitor, power source and all
necessary circuitry.
The VJ-3 is available from the factory in a variety of configurations suitable for different tasks, with optional insertion tube lengths and diameters, as well as different light wavelengths: white, infrared, or ultraviolet.
The video signal from the VJ-3 can be viewed on the integrated LCD display or on an external television.


The camera can be used to observe the crack, rust and foreign substances inside. It is widely used in the production and detection procedures of modern core industries like aviation, automobile, ship, electrical engineering, chemistry, electric power and so on. The high-brightness LED lighting technology as applied allows the illumination to be more than 10,000 Lux. With the general graphic processor technology, the camera has the best color restoration ability and photo-sensibility for better color restoration and definition.

  • Fig. 4-1 VJ-3 Articulating Video Borescope


  1. Camera/LED module
  2. Insertion Tube
  3. On-Off/Charging indicator
  4. Return/Photo/Video/Image Playback/Switch
  5. Left adjustment key
  6. Right adjustment /Video Playback key
  7. Camera/Video key
  8. Down Key
  9. Up key
  10. Menu key
  11. On/Off button
  12. Camera/Video key
  13. Headset jack
  14. HDMI video output interface
  15. SD card slot
  16. Micro USB




  • Before carrying, check the case, handle, and buckle to ensure the case is entirely closed. The case cover may be accidentally opened when lifting if the buckle is not fully closed.
  • Always use the provided case to protect the VJ-3 borescope.
  • Only remove the instrument from the case when the cover is completely open. This prevents accidents caused by the cover closing unexpectedly.
  • Do not operate the borescope from within the case. The case cover may close unexpectedly and pinch the hand.

Removing the instrument from the case

  • Place the case horizontally on a flat and stable surface before opening.
  • Start by gently removing the insertion tube from the case.
  • Once the insertion tube is removed, use your other hand to remove the base unit.


Using your thumb and forefinger, press the two buttons on the sides of the battery chamber at the base of the handle. Pull gently to remove the battery compartment from the handle. (See Fig. 6-2) (as shown in Fig. 6-3).


Push the compartment cover down gently with the thumb to open the battery compartment.


Load the 18650B Li-ion battery according to the indications on the positive and negative electrode.


  • The battery cannot be placed in reverse polarity.
  • Only one 18650B Li-ion battery is required.
  • When needed, replace battery with a new 18650B Li-ion battery with PCB-protection circuit.


  1. Connect the AC power adapter that is included with your kit to the unit’s micro USB battery recharging port.
  2. Plug the AC power adapter into a standard wall outlet.
  3. The battery is charging when the On/Off Charging Indicator light is red. Charging is finished when this indicator light is green.


  • Use only the supplied AC power adapter for recharging the battery—input of 100-240 V (50/60 Hz) AC, output of DC5V 2A, with micro USB interface
  • Use of an adapter that does not comply with the above specifications can cause fire, electrical shock or severe damage to the battery and/or borescope, and will void the warranty.
  • The power adapter provided with this product is not waterproof. It may cause electric shock if it comes into contact with water.


  1. Load the 18650B Li-ion battery into the battery charger with the positive end toward the top of the charger.
  2. Plug the charger into a standard wall outlet.
  3. The charging is finished when the charger shows 100% or the voltage shows 4.2V.


  • Ensure the battery is correctly loaded into the charger.
  • The charger has built-in circuitry to prevent over-charging, however the batteries should be removed from the charger and placed back into the carrying case or the borescope after they are fully charged.


  1. Camera/LED module
  2. Insertion Tube
  3. On-Off/Charging indicator
  4. Return/Photo/Video/Image Playback/Switch
  5. Left adjustment key
  6. Right adjustment /Video Playback key
  7. Camera/Video key
  8. Down Key
  9. Up key
  10. Menu key
  11. On/Off button
  12. Camera/Video key
  13. Headset jack
  14. HDMI video output interface
  15. SD card slot
  16. Micro USB

The Menu button is used to display the main menu. When pressed from within the Menu it serves as a selection or confirmation key.

The Up Key is used to go to a previous page within the menu.

The Down key is used to turn to the next page.

The Camera/Video key is used to take photographs in camera mode, or to start/stop a recording in video mode.

The Right Adjustment/Video Playback key is used to adjust the status or function within menus. It is used as play key while in image play- back mode.

The Left Adjustment key is used to adjust the status or function in the menus.

The Back/Photo/Video/Image Playback/Switch key is used to switch between modes. There are four modes; Photo, Video, Image Playback and Video Playback. It is used to execute ‘Return’ in the menu.

The ON-OFF key is used for startup and shutdown.


  1. Press the Menu key in any mode to enter the main menu, press the Down key to select system settings (see Fig. 7-3).
  2. . The system settings menu has seven settings; language, date/time, auto shutdown, date stamp, format, factory setting and firmware upgrade.

This menu option is used to set the display language on the borescope. You can select from: English (En), Simplified Chinese (Simplified), Traditional Chinese, German (De), Spanish (Es), French (Fr), Russian (RU), Japanese (JP), or Korean (Kr).

This menu is used to adjust the time (see Fig. 7-4) and the date. To make changes, press the Back/Camera/Video/Image Playback/Switch key to switch options, press the Up key or Down key to adjust the date. To confirm, press the Menu key . To return to the previous menu press the Back/Photo/Video/Image Playback/Switch key .

This menu option is used to adjust the automatic shutdown, which is used to conserve battery life if the borescope is not in use for a specified period of time. The options are 1 min, 3 min, 5 min, or OFF.

This menu option allows you to adjust the date stamp placed on the upper right corner of photos and video. Options available are OFF, Date, or Date and Time (see Fig. 7-5).

This Menu option will format the SD card. All data will be removed from the card and cannot be restored. Select “Yes” on each screen of the Format menu to format the SD card. Do not pull out the SD card during formatting.

This will restore all system data to the factory setting. After restoring to the factory setting through the option in the menu, select Yes to restore it to the factory setting.

Can be used to update the system software.


  • When in Photo or Video mode, press the Up key or Down key to access the On Screen Left Function Menu. (Fig. 7-6)

This menu contains nine different function settings. The settings are LED brightness, exposure, special effect, zoom-in, freeze, grid, rotation, aspect ratio and white balance.

This setting adjusts the brightness of the LEDs. Press Up key or Down key to access LED Brightness setting. Adjust the brightness of the LEDs by pressing the Right Adjustment/Video Playback key or Left Adjustment key .

  • There are 6 levels for the LED brightness represented by the icons which are:

This setting adjusts the overall brightness of the image. Press the Right Adjustment/Video Playback button to make the displayed image brighter or the Left Adjustment button to make it darker.

This option is used to adjust the color of static images currently displayed and recorded.

  • Options are Normal, Black and White, Inverted Colors. The icons displayed for each setting are:


  1. When selected, Images can be digitally magnified by 1x (up to 4x) with each press of the Right Adjustment/Video Playback key .
  2. To restore the displayed image to it’s original size, press the Right Adjustment/Video Playback key repeatedly until the normal zoom is restored.
  3. While zooming the screen will display the values of magnification with icons:


  1. When inspecting in real-time, press Freeze to create a still the image on the screen. To defreeze, press the Right Adjustment/Video Playback key to restore the screen to a real-time image display .


  • Do not move the insertion tube when the image is frozen as there will be no live display of the movement and damage could occur to the unit.


  1. An on-screen grid can be displayed. This guide is designed to provide a visual reference for the size of objects on screen.
  2. Options: Thick, None, Thin, or Medium represented by the icons which are:


  1. When a real-time image is displayed, it can be flipped or rotated by pressing the Right Adjustment/Video Playback key .
  2. There are four options when rotating. Normal, Flipped, upside down, and flipped upside down. The icons are:

This setting sets the display scale, 4:3 or 3:3 .

The displayed image’s white balance can be manually adjusted or automatically adjusted by the borescope to ensure the best color reproduction.

Auto white balance : This setting automatically detects the color temperature of the photographed object and makes color adjustments.

Manual white balance : To set the manual white balance. At the site of use, take a white piece of paper and place it 6-12 inches in front of the camera module, filling the entire screen. This will set the color temperature for the borescope camera.


To display the real-time borescope image on an external monitor connect the HDMI cable to the display and the HDMI port on the borescope.


Before turning on the borescope:

  1. Insert the SD card, otherwise all image capture and video recording functionality will be inoperative.
  2. Check the lens for any dirt, grime or debris. Clean as necessary, using the cleaning swabs provided, being careful not to flex the bending section while doing so.

Press the on-off button (see Fig. 8-1) near the top corner of the base unit. The borescope will power up and the LCD will display the real-time image captured by the camera/LED module.


Inserting the insertion tube
Make sure the insertion tube and bending section are straight before starting the inspection.

DO NOT attempt to articulate the bending section with the joystick while the insertion tube is coiled, as this will result in breakage of the articulation control wires.

  • After the insertion tube enters the inspection port, adjust the brightness as necessary and use the LCD monitor to see the internal view.
  • Manipulate the joystick as needed in order to steer the insertion tube and camera/LED module to the inspection target.

STOP IMMEDIATELY if the joystick control mechanism does not respond to normal inputs or any abnormality occurs during operation. Move the joystick to the center position and carefully extract the insertion tube from the inspection area.


  1. Move the joystick to the center/neutral position.
  2. Withdraw the insertion tube slowly, being careful to hold on to it with one hand so that it does not drop after it exits the inspection access port.


  • Do not remove the insertion tube when the bending section is at an angle. Doing so could damage the bending section and/or the equipment being inspected.
  • If the insertion tube becomes stuck during the extraction, gently rotate the joystick until it becomes dislodged, and then pull the insertion tube out. Never yank or forcefully remove the insertion tube.

Still images and video can be recorded during live view mode and are stored on the SD card.


  1. Open the rubber cover on the left side of the base unit.
  2. Insert the SD card into the slot with the card’s notch pointed toward the top of the base unit, then close the rubber cover.


  • The SD card is not properly aligned if it does not slide smoothly into the slot. Please check the direction of the card and never use force.
  • The file name will automatically be generated when saving images on the SD card.
  • For the filename extension, “.JPG” represents the still image file, and “.AVI” represents the video file.
  • File numbers are assigned sequentially from 0001 to 9999.


  1. When a real time image is displayed press the Back/Photo/Video/Image Playback/Switch key to switch the mode to camera.
  2. Press the Camera/Video trigger button under the handle grip or in the lower center of the button to record a still image.


  1. When a real time image is displayed press the Back/Photo/Video/Image Playback/Switch key to switch the mode to video.
  2. Press the Camera/Video trigger button under the handle grip or in the lower center of the button to record a video. Press it again to stop recording.


Not Currently Available on this model


  1. When a real time image is displayed press the Back/Photo/Video/Image Playback/Switch key twice from camera mode and once from video mode to display an image.
  2. Once in the full image view, press the Up key or Down key to move to the next image or video.
  3. To play a video back, press the Camera/Video key when viewing the video in Full Screen View.


  1. When reviewing an image in full screen view, navigate to the image or video you want to remove.
  2. Press the Menu key to bring up the prompt “Delete this file?”.
  3. Use the Up key to highlight “Yes” then press the Menu key again to confirm the deletion.


  • Once you delete that image, another “Delete this file?” prompt will appear on the next image. If you want to keep that image, press the Menu key when “No” is highlighted and it will remove that prompt.



  • Although the option to delete all images/videos is not available, all Images and Video can be viewed, organized and deleted by removing the SD card (8.4.1) from the VJ-3 Borescope and using the supplied SD card reader with your computer.




  1. Wipe dirt, grease, grime and liquids from the insertion tube with a dust-free cloth.
  2. Make sure that the insertion tube is completely dry before replacing the borescope back into the case.

Do not store the borescope in a high temperature, high humidity, or corrosive environment.

If the LCD screen has fingerprints, grease or stains, wipe the screen with a dust-free cloth.

Wipe the base unit with a dust-free cloth as needed.

  1. Return the borescope to the case carefully in order to avoid unintentional damage to the insertion tube or camera/LED module.
  2. Be sure that the joystick is in the center/neutral position and that the bending section is straight, prior to inserting the borescope into the case.
  3. When returning the borescope to the case, first place the base unit into the case, then carefully feed the insertion tube into and around the slotted channel in the case that is designed to house the insertion tube.

Store at normal room temperature and humidity.


If malfunctions cannot be resolved by following the troubleshooting guidelines below, please contact View Tech for more detailed troubleshooting instructions or to request a Return Merchandise Authorization (RMA) and repair ticket:

Unable to capture images or video No SD card Install the SD card correctly
Still showing no SD card after insertion of SD card SD card is not inserted properly Re-insert the SD card into the slot
Automatic shutdown Triggered by too high ambient temperature Stop using, allow unit to cool down, and then restart
Triggered by too low battery level Charge the battery
Unclear image The camera lens or LCD monitor is dirty Wipe clean with a dust- free cloth or swabs
Joystick resistance feels high—A lot of pressure is required to move the joystick The insertion tube is coiled or bent too much Straighten the insertion tube as much as possible
  • Please contact ViewTech before sending your borescope in for repair. A detailed description of the problem and an overview of the operating environment or accident that may have caused the damage will be requested.
  • Servicing and repair of this borescope is to be performed only by ViewTech. Do not disassemble or attempt to repair this borescope, as this will immediately void the warranty.


The purchased product is covered under the manufacturer product warranty. The warranty becomes effective on the date the purchaser receives the original product. The warranty period is twelve months from the effective date. During the warranty period, the manufacturer will repair, at manufacturer’s expense (including shipping expenses), any defective products or components. This warranty covers only those repairs that become necessary due to product defects or defects in manufacturer workmanship. This warranty does not cover damage to the purchased products due to misuse, abuse or accidents involving the products.

The manufacturer product warranty will be void regardless of the remaining warranty period if the product is opened, customized, or tampered with by an unauthorized technician. If any repair or modification is performed by an unauthorized technician, ViewTech will not be responsible or liable for any damage to persons or property that may result.

To initiate a repair, regardless of whether the repair is under warranty or not, an RMA (Return Merchandise Authorization) number must be obtained. Any item(s) returned without an RMA number cannot be accepted or processed. Please follow the repair procedure as indicated below:

  • Call ViewTech at 231-943-1171 to request a Return Merchandise Authorization (RMA) Number.
  • Package the unit securely and ship the product to the address that will be provided along with the RMA number.
  • Upon completion of the repair, the unit will be returned to the address specified by the customer.
    If the repair falls outside the warranty terms or the warranty period, customer will receive notice of the repair charges prior to repair.


Low voltage directive and EMC directive

Conforms to CE
WEEE directive
Conforms to WEEE
RoHS directive
Conforms to RoHS

Customer Support

Traverse City, Michigan, USA

Documents / Resources

viewtech VJ-3 3.9mm Video Borescope [pdf] User Manual
VJ-3 3.9mm Video Borescope, VJ-3, 3.9mm Video Borescope, Video Borescope


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