Oven lamp is not lit, there are two reasons: First, lamp and bulb poor electrode contact, tighten the bulb, lamp holder with a central spring hook forceps improve a little. Wipe off the bottom of the bulb with fine sandpaper central point of tin oxide, tin-point ablation depression if required by soldering a hemispherical and smooth, tighten the bulb to light up. Second, the light bulb filament burns out, with type E-14, 220V, 15W screw bulb replacement.MgYservice manual download site