Janome QMP16SU Manual page 61

past its highest position, until then needle is down to its lowest position). Note: this is opposite the
beep during needle sensor test in diagnostics!
• Option LED: off (even if the over speed alarm and stitch regulation are turned on when front
handlebars are unplugged)
• HRTBT LED: Heartbeat LED flashed like a heart beat
• SPEED LED: Flashes rapidly when the hand wheel is rotated slowly.
• 18VDC LED: Is lit constantly
• 5VDC LED: Is lit constantly
NOTE: Control board beeps three times at regular intervals (about 5 seconds apart), because there is no
front control display attached to the machine to communicate with the Control board.
With the front handlebars plugged into the machine, the LEDs display as follows:
• Test 1 LED: goes on when the start button on the handlebars is pressed and off when the stop button
on the handlebars is pressed.
• Test 2 LED: goes on when stitch regulation mode is selected
• Test LED3 and Test LED4: Flashes rapidly, indicating transmit and receive communications to the front
display.
• Needle LED: Same
• Option LED: Goes on when the stitch regulation over speed alarm is enabled.
• HRTBT LED: Same
• Speed LED: Same
• 18VDC LED: Is lit constantly (same)
• 5VDC LED: Is lit constantly (same)
 NOTE: The Control board does not have three beeps any longer, because the front display is
connected and communicating properly with the Control board.
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QMP16SU Service Manual