Try varying the AC input voltage with the Variac, probably HV shutdown, look to your regulator circuit. -Ed- Tel-Tek Electronics Midland, Ontario Canada. teltek2@xxxxxxxxxxxx ----- Original Message ----- From: "derouin" <derouin@xxxxxxxxxxx> To: <techassist@xxxxxxxxxxxxx> Sent: Friday, August 30, 2002 4:45 PM Subject: [TechAssist] PANASONIC CTP-3189SF INTERMITTENT SHUTDOWN > Hello everyone I am working on a panasonic ctp-3189sf with intermittent shut off not shut down. when the set shuts off I can just press the power button and it will come back on. If no antenna connected set will not shut off. when screen control turned up set shuts off. I measured all voltages on ABL cirucit found what appeared to be several leaky transistors (Q312, Q313 AND Q302 The ABL Transistor replaced these and set still shuts off rechecked all voltages including the 5.0 volt the 12volt and the 140 volt. scoped the abl ciruit no changes occur prior to shut down. replaced ic 301 AN5304NK Deflection chip for GP. Still shuts off. (SAMS IS 3163 ) I am kinda lost where to go I am hoping some one has had this trouble or can lead me back to the right direction > thanks > > Jim Brown > Norms TV & Computer Service > 815 Valley Ave > Sumner Wa > 253-863-4521 > FAX 253-863-5622 > Repair !The Last stop on the way to the land fill > > ------------------------------------------ > To REMOVE your email address, click here: > http://www.tech-assist.org/unsubb.html > To CHANGE your email address, click here: > http://www.tech-assist.org/change.html > ------------------------------------------ > ***NEW*** Tips Added Instantly!!!*** > Submit Repair Tips here: > http://www.tech-assist.org/secure/tip/ ------------------------------------------ To REMOVE your email address, click here: http://www.tech-assist.org/unsubb.html To CHANGE your email address, click here: http://www.techassist.net/forms/change.html ------------------------------------------ ***NEW*** Tips Added Instantly!!!*** Submit Repair Tips here: http://www.tech-assist.org/secure/tip/