Manual for GY-HM660U/GY-HM620U

Manual for GY-HM660U/GY-HM620U

Brand: JVC

Category: Camcorder

Document Type: Manual

Language: EN

Uploaded: Aug. 10, 2025, 12:35 a.m.

  • Basic Shooting Procedures: Ensure power supply, insert SD card, turn on the camera, adjust LCD monitor/viewfinder angle, configure system settings (HD, QuickTime/MPEG2, 1920x1080, 60i/50i HQ), configure video/audio input settings, press REC to start recording, and check captured images via Clip Review.
  • Playing Recorded Clips: Use side control panel buttons to play back, pause, skip, or stop clips. Navigate to the thumbnail screen, select a clip, and press the playback/pause button. Adjust audio volume using the MONITOR +/- button.
  • Troubleshooting: Covers common issues like power not turning on, inability to record, no image output, playback problems, no sound, dark/blurred images, non-functional recording level knob, SD card initialization errors, and battery alarms. Actions involve checking connections, settings, card compatibility, and battery age.

Troubleshooting and error codes

SymptomAction
Power does not turn on.
  • Is the AC adapter properly connected?
  • Is the battery charged?
  • Is the power turned on immediately after it is turned off? Make sure to wait for an interval of at least 5 seconds before turning on the power again.
Unable to start recording.
  • Is the record trigger button/lock switch on the handle turned on?
  • Is the write-protect switch of the SD card turned on? Make sure that the write-protect switch is turned off.
  • Is the camera recorder set to the Camera mode? Use the [MODE] selection button to switch to the Camera mode.
  • Is the SD card inserted compatible with the recording format?
Camera image is not output on the LCD monitor and viewfinder screen.
  • Is the camera recorder set to the Camera mode? Use the [MODE] selection button to switch to the Camera mode.
Playback does not start after selecting a clip thumbnail and pressing the Set button (●).
  • Is the selected clip a playable clip? Playback is not possible if the clip has a different video format setting.
No sound during playback.
  • Is the currently played clip recorded in the Variable Frame Rec mode?
Images on the LCD monitor and viewfinder screen appear dark or blurred.
  • Readjust the brightness of the LCD monitor and viewfinder.
  • Is the [ND FILTER] switch set to “1/64"?
  • Is the iris closed?
  • Is the shutter speed setting too high?
  • Is the amount of peaking too little? Use the [PEAKING +/-] button to adjust the contour for the LCD monitor and the viewfinder screen.
The [CH1/CH2] recording level adjustment knob does not work.
  • Is the [CH1/CH2 AUTO/MANUAL] switch set to “AUTO"?
  • Is the [FULL AUTO] switch set to “ON"? Is the [FULL AUTO] switch set to “ON", and [A/V Set] → [Audio Set] → [Audio On FULL AUTO] set to "Auto"?
SD card cannot be initialized (formatted).
  • Is the write-protect switch of the SD card turned on? Make sure that the write-protect switch is turned off.
Battery alarm appears even after loading a charged battery.
  • Is the battery too old?
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