Jeff, There is not any HV at all, and the collector waveform isn't close. Other waveforms in horiz. circuit have correct waveforms, but peak to peak is way low, I presume because of loading down somewhere. I had checked horiz. output before, but rechecked it, no short e-b, checks approx. 45 ohms. I didn't have a vert. output chip to try, but unsoldered all pins on chip and tried at reduced line voltage (variac) and had same symptom, shutsdown. I ordered vert. chip and also regulator chip to try. Haven't got them yet. ANY OTHER SUGGESTIONS? ----- Original Message ----- From: Shoreline Electronics <jstielau@xxxxxxxx> To: <techassist@xxxxxxxxxxxxx> Sent: Tuesday, September 18, 2001 8:40 PM Subject: [TechAssist] Re: Dead Zenith M#Z25X22S > > Dan, > > Is the HV coming up OK? Horiz collector waveform look good? > > Jeff Stielau > Shoreline Electronics Repair > 125 Beechtree Lane > Westbrook,CT 06498 > 860-399-1861 Voice > 860-664-3535 Fax > jstielau@xxxxxxxx > > ----- Original Message ----- > From: "Webster TV" <webstertv@xxxxxxx> > To: <techassist@xxxxxxxxxxxxx> > Sent: Tuesday, September 18, 2001 8:54 PM > Subject: [TechAssist] Dead Zenith M#Z25X22S > > > > > > Need help on this Zenith, unit is dead, relay clicks and in about 5 > seconds > > it sounds like it goes into shutdown. Checked all voltages and waveforms > in > > power supply, nothing seems to be way off, when set shutsdown set looses > the > > 14.7v and 9v source voltage, 5v source stays OK. Defeated shutdown circuit > > according to SAMS instructions, by removing diode DX3006 from circuit, set > > still shutsdown. Tried disconnecting tuner as have had problem with tuner > > causing same symptom, but didn't help.ANY SUGGESTIONS! > > Also have checked transisters in power supply and horiz.circuit. > > Dan Webster > > Webster's TV > > > > 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. > 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.