You can make that a 103-344 for the part ID all Zenith Diodes start with 103- fuzzzz ----- Original Message ----- From: "Phil Bader" <philbad@xxxxxxxxxx> To: <techassist@xxxxxxxxxxxxx> Sent: Saturday, October 13, 2001 4:39 PM Subject: [TechAssist] [Fwd: Re:fix. Zenith SS2509H 9-914-2 main dead,still no chirp] -------- Original Message -------- Subject: Re:fix. Zenith SS2509H 9-914-2 main dead,still no chirp Date: Sat, 13 Oct 2001 16:38:59 -0400 From: Phil Bader <philbad@xxxxxxxxxx> Organization: Jan Phyl TV Inc. Winter Haven, Fl. Estab. 1976 To: Topics of interest to consumer electronics repair professionals <CONSUMERELREPAIR-L@xxxxxxxxxxxxxxxxxxxx> References: <3BC89B85.7D437AEA@xxxxxxxxxx> The final fix was power supply diode CR3432 ( 344-00 on part) was shorted.Don't know actual equivalent number,as there were many of the same on another salvage board. I'll note for future reference this diode will not cause a short condition,but shuts down the SMPS and no chirp when plugged in. Easy to overlook with all the low ohm resistors near by.Thought I was reading across one when I measured that very diode earlier. Phil Bader wrote: > > I went thru the SMPS as usual replacing Q3431 (121-1244), the two caps > C3434 (22mfd/63V),C3432 (100/25V),opto IC ICX6300 (162-18-0),. Also > C2604 (22/100V),C6054 (47/25V) as these were leaking fluid also, reg ic > STR53041 changed. Checked all lo-ohm resistors in SMPS. I still don't > get the characteristic "chirp" of the SMPS when plugged in.Nothing,of > course past the SMPS transformer, because it's still not oscillating. I > am stumped.Help needed!-Phil 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.