Brand: JVC
Category: Camcorder
Document Type: Manual
Language: EN
Manual for GZ-RX645
Uploaded: Aug. 10, 2025, 12:35 a.m.
Warranty Information
Consult the nearest JVC service center for any issues or for replacement of the built-in battery.
Getting Started
* Verifying Accessories: Check all included accessories against the list provided.
* Turning On/Off: Open the LCD monitor to turn on the unit; close it to turn off.
* Charging: Connect the AC adapter to charge the built-in battery. The CHARGE lamp indicates charging status.
* Quad Proof: Unit is waterproof, dust-proof, drop-proof, and freeze-proof. Follow underwater usage guidelines carefully.
* Grip Adjustment: Adjust the pad and belt for a secure grip.
* Attaching Core Filter: Attach core filters to AC adapter and AV cables to reduce interference.
* Inserting SD Card: Open terminal cover, then insert SD card in the correct direction.
* Using Touch Screen: Operate the unit by tapping or dragging on the LCD monitor. Adjust touch screen sensitivity if needed.
Recording
* Auto Mode: Camera automatically adjusts settings. Select i.A. (Intelligent Auto) mode.
* Recording Modes: Switch between Video/Still Image modes, and select recording modes like i.A. or Manual.
* Recording Indications: Monitor display icons for video quality, time, effects, battery, etc.
Playback
* Playback Screens: View recorded videos or still images on the LCD monitor or TV.
* Index Screen: Browse recorded files via thumbnails.
* Playback Operations: Use playback buttons for play, pause, zoom, delete, etc.
Settings Menu
* Access various settings for recording, playback, Wi-Fi, setup, and connections via the MENU button.
Troubleshooting
* Refer to the troubleshooting section for solutions to common issues like inability to turn on, charging problems, recording errors, and playback interruptions.
Troubleshooting and error codes
| Issue | Possible Cause | Solution |
| Unable to turn on the power. | Battery power is low. | Charge the battery for more than 40 minutes. If the unit still does not turn on, reset it. |
| Charging battery is not possible. | Incorrect temperature range (below 10°C or above 35°C). | Charge within the recommended temperature range. |
| Remaining battery display is not correct. | Extended use in extreme temperatures or repeated charging. | If battery life is significantly reduced, it may need replacement. |
| Battery runs out quickly even after charging. | Battery performance drops temporarily in cold temperatures (-10°C to 0°C). Battery may need replacement. | Avoid extreme cold. If problem persists, consult JVC service center for battery replacement. |
| Recording cannot be performed. | Incorrect recording mode or SD card setting. | Check the button and set to recording mode. Ensure REC MEDIA setting is correct. |
| Recording stops automatically. | Exceeded 12 consecutive hours of recording or unit overheating. | Turn off the unit, wait, and turn it back on. It stops to protect the circuit when temperature rises. |
| Continuous shooting speed of still images is slow. | Repeated use of the function, SD card speed, or recording conditions. | Use a high-speed SD card (Class 4 or higher). Check recording conditions. |
| Focus is not adjusted automatically. | Dark place, low contrast subject, or dirty lens. | Adjust focus manually. Clean the lens. Cancel manual focus if used. |
| Zoom does not work. | Digital zoom not available in certain modes (still image, time-lapse). | Set "ZOOM" in the menu accordingly. |
| Mosaic-type noise occurs. | Fast movements or extreme brightness changes. | Set "VIDEO QUALITY" to "UXP" or "XP". |
| Inside of the lens is foggy. | Condensation due to temperature rise during recording. | Open terminal cover, close LCD monitor, and leave unit to reduce temperature. |
| Cannot insert the SD card. | Incorrect insertion direction or using unsupported card type (miniSD/microSD). | Insert card in the correct direction. Use compatible SD/SDHC/SDXC cards. |
| Unable to copy to SD card. | Incorrect REC MEDIA setting or SD card write-protected. | Set REC MEDIA correctly. Release write protection on SD card. Format SD card if necessary. |
| Sound or video is interrupted. | Interruption at connecting section between scenes. | This is not a malfunction. |
| There is no sound. | Silent mode is on or operation sound is set to OFF. | Turn off Silent mode. Set "OPERATION SOUND" to "ON". |
| Same image displayed for a long time. | Slow SD card or dirty terminals. | Use a high-speed SD card. Clean terminals. Format SD card. |
| Motion is choppy. | Slow SD card or dirty terminals. | Use a high-speed SD card. Clean terminals. Format SD card. Verify PC system requirements. |
| Cannot find a recorded file. | Incorrect playback media selected or file management issue. | Tap SD to change playback media. Select "PLAYBACK OTHER FILE". |
| Images do not appear on TV properly. | Connection issue or unit requires reset. | Disconnect and reconnect HDMI cable. Reset the unit. |
| Images projected vertically on TV. | Incorrect VIDEO OUTPUT setting. | Set "VIDEO OUTPUT" to "4:3". Adjust TV screen. |
| Image displayed on TV is too small. | Incorrect VIDEO OUTPUT setting. | Set "VIDEO OUTPUT" to "16:9". |
| When connected to TV via HDMI, displays are slow. | TV compatibility. | This is normal and not a malfunction. |
| Touch screen does not work. | Fingernails, gloves, or SCREEN LOCK enabled. | Use fingertip. Disable SCREEN LOCK. |
| Image is grainy. | Digital zoom used. | Digital zoom enlarges the image, making it appear grainy. |
| Unit heats up. | Normal operation when used for a long time. | Stop use if it gets too warm. |
| Language on display changed. | Connected to TV with different language setting via HDMI. | Check TV connection settings. |
| HDMI-CEC functions do not work properly. | TV compatibility. | Set "HDMI CONTROL" to "OFF". |
| Unit operates slowly. | Too many recorded files. | Copy files to computer and delete from unit. |
| Unit does not function properly and error messages appear. | Electrostatic discharge, noise, or interference. | Close monitor, remove AC adapter, and reset unit. |
| CHARGE lamp and POWER/ACCESS lamp blinking, operation disabled. | Internal malfunction. | Reset unit. If problem persists, contact JVC dealer. |
| SET DATE/TIME! | Clock reset due to battery depletion. | Set the clock after charging the battery. |
| COMMUNICATION ERROR | USB connection issue. | Reconnect USB cable. Turn devices off/on and reset unit. |
| FORMAT ERROR! | Incorrect operating procedure. | Check procedure and perform again. Reset unit. |
| ERROR IN BUILT-IN MEMORY! | Problem with internal memory. | Reset unit. If problem persists, back up files and format built-in memory. |
| MEMORY CARD ERROR! | Unsupported card, dirty terminals, or unformatted card. | Check card compatibility. Reset unit. Remove/re-insert card. Clean terminals. Format SD card. |
| NOT FORMATTED | SD card not formatted. | Select "OK" and "YES" to format the card. |
| RECORDING FAILURE | Internal issue. | Reset unit. |
| CANNOT TAKE MORE STILL IMAGES AT THIS TIME | Video recording is in progress. | Stop video recording before taking still images. |
| PLAYBACK FAILED | SD card issue. | Remove/re-insert card, clean terminals, insert before powering on. Avoid impact. |
| UNSUPPORTED SCENE! / UNSUPPORTED FILE! | File recorded on other devices. | Use files recorded with this unit only. |
| THIS FILE IS PROTECTED | File protection is enabled. | Switch off the "PROTECT/CANCEL" function in the "EDIT" menu. |
| CHECK CARD'S WRITE PROTECTION SWITCH | SD card is write-protected. | Set the write protect switch of the SD card to off. |
| INSUFFICIENT AVAILABLE SPACE | No free space on built-in memory or SD card. | Delete files, move files to computer, or use a new SD card. Ensure sufficient space before combining. |
| RECORDABLE MANAGEMENT CAPACITY LEVEL HAS BEEN REACHED | Reached storage capacity limit. | Move files to computer. Format the built-in memory or SD card. |
| SCENE QUANTITY EXCEEDED LIMIT | Exceeded scene limit. | Move files to computer. Format the built-in memory or SD card. |
| NUMBER OF FOLDERS OVERFLOW | Exceeded folder limit. | Move files to computer. Format the built-in memory or SD card. |
| FILE QUANTITY LIMIT EXCEEDED | Exceeded file limit. | Move files to computer. Format the built-in memory or SD card. |
| NO FILES | Incorrect media setting or no files on selected media. | Change "REC MEDIA" setting and check files. |
| RECORDING CANCELLED | Incorrect media setting. | Set "REC MEDIA FOR VIDEO" to "SD CARD" and record. Reset unit. Protect from shock. |
| DATA RECORDED FILE IS TOO SMALL TO BE SAVED (CONTINUE RECORDING?) | Time-lapse recording stopped too early. | Ensure sufficient recording time for saving. |
| CAMERA TEMPERATURE IS HIGH PLEASE TURN CAMERA OFF TO ALLOW IT TO COOL DOWN PLEASE WAIT | Unit has overheated. | Turn off the unit and let it cool down before turning it back on. |