RockJam RJ640 User Manual (English)

Questions and Answers:

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Derek GutierrezAug 10, 2025
How to fix no sound on my RockJam RJ640?
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  chelsea59Aug 10, 2025
  If you're not getting any sound from your RockJam Keyboard when you press the keys, here are a few things to check: * Make sure the master volume is turned up to a suitable level. * Ensure that headphones or other external equipment aren't plugged in, as they'll automatically disable the built-in speakers. * Verify that fingered chord mode isn't active, as incorrect key presses in this mode won't produce sound. * Confirm that the volume isn't set to the lowest level (muted).
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steven71Aug 16, 2025
What to do if my RockJam Keyboard sound is distorted?
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  David HatfieldAug 16, 2025
  If the sound from your RockJam Keyboard is distorted or interrupted, and the keyboard isn't working as expected, it might be due to the power adapter. Try using the power adapter that came with your keyboard. Alternatively, the batteries may need replacing.
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Elizabeth AndersonAug 21, 2025
What to do if auto accompaniment does not work on RockJam Keyboard?
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  Jessica Keith MDAug 21, 2025
  If the auto accompaniment isn't working in SYNC status on your RockJam Keyboard, ensure that Chord mode is selected. Then, play a note using the first 19 keys on the left side of the keyboard.
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Karen WilsonAug 28, 2025
Why is the pitch of the note not correct on RockJam Keyboard?
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  kevin03Aug 28, 2025
  If the pitch of the note on your RockJam Keyboard sounds incorrect, verify that the transpose setting is set to 00.
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Javier SmithSep 3, 2025
Why is there noise when turning RockJam RJ640 Keyboard on?
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  Timothy EspinozaSep 3, 2025
  This faint noise when turning your RockJam Keyboard on or off is normal, so there's no need to worry.