Hello . I have experinece with 3 sony PTV before. Same problem . I adjust the screen voltage(at screen ,focus block) 3guns. at some level It will activate the E board circuit then the picture comes out. Good luck. Dang TVCR -----Original Message----- From: Phil Bader <philbad@xxxxxxxxxx> To: techassist@xxxxxxxxxxxxx <techassist@xxxxxxxxxxxxx> Date: Friday, October 12, 2001 4:11 PM Subject: [TechAssist] [Fwd: Sony KPR53EX35 PTV,Has HV,no pic (black)CRTs have filiment vltg.] > > > >-------- Original Message -------- >Subject: Sony KPR53EX35 PTV,Has HV,no pic (black)CRTs have filiment >vltg. >Date: Fri, 12 Oct 2001 12:15:53 -0400 >From: Phil Bader <philbad@xxxxxxxxxx> >Organization: Jan Phyl TV Inc. Winter Haven, Fl. Estab. 1976 >To: "CONSUMERELREPAIR-L@xxxxxxxxxxxxxxxxxxxx" ><CONSUMERELREPAIR-L@xxxxxxxxxxxxxxxxxxxx> > >I submitted this unit to the forums when it came in,but have more info >now. Customer said it would "shut off" after 20-30 minutes.Wait >awhile,try again and would work OK,then shut off again. Now,no pix all >the time.Got schemo (Herman electronics sent me a Sony "sub" manual for >a 53X30,not exact).The tech troubleshooting this says: Has no pix,but >has high voltage to the CRTs anodes,looking directly into the CRT shows >totally black,no illumunation on either three.All three have filiment >voltage glowing in necks. "G" board: -135V measures -138,+133V meas. >+133, -15V meas. -23V,+15V meas. +10V, +45V meas. +50V, +115V meas. >+114.5V. On the convergence "D" board, at plug "D16" measured less than >2VPP of some kind of signal,the schemo states should be about 100VPP >vert.not there. He's thinking the Jungle chip IC201 "CXA1012AS" is >suspect (sony# 875203171). Any input on this appreciated. >Help make your TechAssist online repair tips >database better! Submit your fixes here: >http://www.circuitwork.com/techassist/tip/#tips >To unsubscribe write to: >techassist-request@xxxxxxxxxxxxx >with unsubscribe in the subject line. Help make your TechAssist online repair tips database better! Submit your fixes here: http://www.circuitwork.com/techassist/tip/#tips To unsubscribe write to: techassist-request@xxxxxxxxxxxxx with unsubscribe in the subject line.