-------- Original Message -------- Subject: Zenith SG5241W (9-912-2 main) dead not usual SMPS parts. Date: Mon, 10 Sep 2001 16:19:26 -0400 From: Phil Bader <philbad@xxxxxxxxxx> Organization: Jan Phyl TV Inc. To: "CONSUMERELREPAIR-L@xxxxxxxxxxxxxxxxxxxx" <CONSUMERELREPAIR-L@xxxxxxxxxxxxxxxxxxxx> Unit totally dead,no bad fuses, Q3431 OK,all the usual SMPS parts (resistors, Q3431, etc) seem OK. Has raw B+ at main filter cap and at least one lead of the STR reg IC (223-28). I ESR'd the two P.S. caps, replaced the 223-28 IC (STR53041), q3431, IC6300 (opto-iso 162-18-0, NTE3041).All seemed OK and no help. Not even the usual chirp when plugged in.This is not the typical senereo.That STR IC circuit seems dead . 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.