Panasonic PT-LB20NTU Service Manual

Also see for PT-LB20E: Operating instructions

Panasonic PT-LB20NTU Service Manual Manual pdf 26 page image

8.5.2. Preparation1. Remove the connector cover and grounding metal (3)according to the steps 1 through 4 in the section 7.3."Removal of A-P.C.Board".2. Unscrew the 2 screws.3. Connect the service kit (extension cables).· Each flexible cable of LCD Panels (R/G/B) - Connectors(A1/A2/A3) on A-P.C.Board· Power fan connector - Connector (A16) on A-P.C.Board· Exhaust fan connector - Connector (A17) on A-P.C.Board· PBS fan connector - Connector (A19) on A-P.C.Board4. Covering with an insulator (cloth or the like) to prevent ashort circuit, set the A-P.C.Board block on the main unit.Note:· Handle with care not to apply external force toconnecting parts which connect the main unit and A-8.5.3.2. G Reflector Adjustment1. Turn on the power and display 100 % white pattern on thescreen.P.C.Board.8.5.3. Adjustment Procedure8.5.3.1. OutlineWhen the lighting area is off from the adjustment and colorunevenness appears, adjust the lighting area into correctposition.Symptom MeasureMagenta unevenness G Reflector AdjustmentCyan unevenness R Reflector AdjustmentYellow unevenness B Reflector Adjustment· Shifting the mirror adjusting lever horizontally, adjust colorunevenness on the screen upper/lower sides.· Twisting the mirror adjusting lever, adjust color unevennesson the screen right/left sides.2. Loosen the 2 screws fixing the mirror adjusting lever A justuntil the lever can be shifted.3. Adjust the mirror adjusting lever A position to minimize colorunevenness on the screen by shifting the lever in arrow26PT-LB20NTU / PT-LB20NTE / PT-LB20NTEA / PT-LB20U / PT-LB20E / PT-LB20EA / PT-LB20SU / PT-LB20SE / PT-LB20SEA / PT-LB20VU / PT-LB20VE / PT-LB20VEA