Panasonic TC-PXXGT30 Technical Manual

Contents

Panasonic TC-PXXGT30 Technical Manual Manual pdf 53 page image

VFO/VSCN_F and VF_5V Resistance Test (46”, 50”, and 55” FHD (S30 and ST30))This test can be used to quickly determine if eitherthe SU, SD, or/and the SC board are bad. Note:even though a short circuit is a clear indication ofa defective board, a no-short-circuit conditiondoes not necessarily means that the boards aregood. Follow the isolation procedure to determineif these boards are good or bad.Preparation:Unplug the TV prior to making any disconnectionor connection.Wait at least 2 minutes before removal of anyconnector.Note: If the power LED continues to blink evenafter the TV has been unplugged, press and holdthe power switch on the TV for a few seconds untilthe LED turns off.Resistance TestProcedure to determine if there is a shortcircuit or low resistance reading of the Vfo(TPSC1) or the VF_5V (R515).Using VFG (Floating ground screws) as ground,measure the resistance of:1. Resistor R515 (TPSC1/VFO)2. Pin 3 of IC724 (VF-5V)Continue on the page after the nextSlide 53