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Electronic appliance repair tips database - TV (LCD,TFT,Plasma,Digital), Monitor, VCR, DVD recorder and player, Digital camera, Audio equipment, Microwave ovens, Phone systems, Computer repair

MakeModelProblemSolutionDate
Found: 14
PanasonicAlpha 4Blank raster - sound ok - same on scart; on Txtshows "P100" at the top left and "*** TXT ***" flashing at the bottom centre of the screen.Replace IC3002 (M52472P) on the "H" panel.14-09-04
PanasonicAlpha 4Blank screen - OSD OK9v supply to IF proc chip IC101 low at pin 41. R170 56R hi res14-09-04

PanasonicAlpha 4Crackle from lh speakerR2081 10k sm cracked14-09-04
PanasonicAlpha 4Field - height increases when heated with twitchingC402 0µ33 mylar cap leaky in ramp gen cct14-09-04
PanasonicAlpha 4Field cramp & buzz on soundTDA3654 fop chip14-09-04
PanasonicAlpha 4Inside the Panasonic Alpha 4 ChassisSee TV Mag June - Sept 199514-09-04
PanasonicAlpha 4int lines across picUHF tuner faulty14-09-04
PanasonicAlpha 4No pic - sound okR539 10 ohms fuse resistor in supply to line driver transistor O/C.14-09-04
PanasonicAlpha 4OSD consist of black boxes only - pic & Txt okC3304 0µ01 leaky & R3309 820R hi res14-09-04
PanasonicAlpha 4Shuts down at sw on with a splutter - HT only 60vLOPTx14-09-04
PanasonicAlpha 4Won't power up - works if pins 3 & 4 of opto shortedQ890 2SC3311-R leaky14-09-04
PanasonicAlpha 4 TX25X1No pic - sound okTDA3654 FOP I.C. and 800mA fuse next to it14-09-04
PanasonicAlpha 4 TX25X1PSU o/ps die aft brief period at sw on with field coll noticedVDP3108-A-29 vid/deflect proc chip - NLA. Fit replacement kit with alternative chip14-09-04
PanasonicAlpha 4 TX25X1Stuck in st/by permSTR56041M PSU chip brought back life to psu but FOP chip & Audio O/P chips both faulty as well as IC1213 micro which, when replaced, gave no sync - IC501 TDA2579B also faulty 14-09-04
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