A power supply diagnostic circuit includes a switching power supply that generates a voltage for powering a fuel injector. At least a part of the end portions of the cores are at least partially exposed. A first rotary member allows the vertical rotating shaft to rotate along with the inclined rotating shaft. These techniques involve the combined use of speech and visual interfaces to correctly identify user’s speech input. An anti-friction surface on one of the resilient clamping strips attached to the top enables selective removal a one trim piece, to expose the butt line for taping, without release of the clamping action on the sheets.