panasonic Alfa1-Bull free download

File name Alfa1-Bull.pdf

TechInfo Sheet fax: 01344 853689 Audio Visual email: [email protected] Product Group: Colour Television Model: Alpha 1 Chassis Date: 22/10/98 Revision No: 01 Document No: 07 Subject: Common Faults Subject: Panasonic Alpha 1 Chassis Dead - no main HT Line...IC801 faulty - STR54051M Dead - no main HT line...Q801 or Q802 leaky - 2SD965R Dead - no main HT line...R803 open circuit - 560kohm Dead - no main HT line...D811 faulty - ON3105TV Dead - D854 short circuit...check IC801/R815/C808/D807 Dead - HT line about 30v...replace Q551 and resolder T531 Low contrast picture...R562 open circuit - 130kohm Blank raster, sound OK...IC101 faulty - TDA4505M No frame scan...IC101 faulty - TDA4504M No line drive...IC101 faulty - TDA4505M Colour flashing at top of screen on VCR...change C604 to 0.33uF at 16v Teletext freezes after about 10 minutes...fit TZS803001 kit Intermittent latching-up...dry joints on X3505 Upgrade for IC1202 - fitting 24C02A...remove R1201 & fit wire link in place of C1202 Nicam upgrade for TX2470 & TX2178...TYSU1 Nicam upgrade for TXC71/74/78 & TX3370...TYSU2 Nicam upgrade for TX2480...TYSU3 Panasonic CS U.K. Document No: 07 Model: Alpha 1 Chassis 1