If in such a case, with the engraver on standby, measure the voltage supplied to the relay (as shown), the normal voltage is 24V.

• If the voltage reads 24V and the relay indicator light stays unlit, replace the relay with a new identical one.
• If the relay voltage reads 0,
  1. Remove the cover of the mainboard.
  2. Measure the voltage of the 24V and GND port of CN1 on the mainboard (as shown).

• If the voltage reads 0, replace the mainboard with a new identical one.
• If the voltage reads 24V.

1. Set your multimeter’s beeper to on.
2. Measure the continuity between the 24V of the CN1 terminal of the mainboard and the V+ of the relay.
3. Measure the continuity between the GND of the mainboard CN1 terminal and the V− of the relay; fix any disconnected point.