What was found
INBOUND CREW MENTIONED AN ELECTRICAL SMOKE SMELL COMING FROM ROW 7. WHEN WE ENTERED THE CABIN THE SMELL WAS PRESENT. THE SMELL IS STRONGER AT ROW 6 AND THE CEILING LIGHT THERE IS MORE DIM. THE CEILING PANEL THERE IS ALSO WARM TO THE TOUCH AS COMPARED TO THE OTHER PANELS. (FLIGHT 3186 - FILED CLOSED) UPON INVESTIGATION FOUND SMELL TO BE COMING FROM ROW 6 CEILING LIGHTS POWER UNIT/DIMMER (PS76), PROCEEDED TO REMOVE AND REPLACE ROW 6 CEILING LIGHTS POWER UNIT/DIMMER (PS76) IN REF. W/ CRJ 700 AMM 33-21-03. PERFORMED OPERATIONAL TEST OF THE PASSENGER COMPARTMENT LIGHTS IN REF. W/ CRJ 700 AMM 33-21-00. OPS CHECK GOOD W/ NO DEFECTS NOTED, ELECTRICAL SMELL NO LONGER PRESENT IN AIRCRAFT. NO FURTHER MX ACTIONS REQUIRED, A/C GOOD FOR SERVICE.