Philips SERVICE TIPS G90B free download

File name SERVICE TIPS G90B.PDF

PICTURE The screen is very white and may have flyback lines. Fault 1: Check the IC 7380 (TDA 8153) on the CRT board (video amplifier). No sound or picture. Fault 1 Check T7039 and if necessary D6039. Picture fault in tuner and scart. Fault 1 Check the earthing to the sheeting from the quartz and TDA8452. Purity fault. Fault 1 Repeat any adjustments made to the G2 voltage. Interference lines when cold but not when warm. Fault 1 Check TEA5101 on the A/P. The sound is correct but no picture. Fault 1 Check C2346 (100nF). When warm the raster pulls and the BU blows. Fault 1 Check the C2459 capacitors. No picture, only teletext. Fault 1: Situation may occur after high voltage flash over or after lightening has struck (nearby). When appliance is switched on, bypass R3348 for a short period of time. R3348 is between pin 9 IC7350 (TDA8390) and ground. Vertical lines/waves at the left of the picture. Poor colour and sync. Fault 1: C2580 (470