Emitter is ground on the QX3401, and yes the fly can cause ps failure but I never have seen one bad without taking out the output transistor... I also had a bad batch of generic regulators, now I use the Zenith replacements... Bob, Bobs TV Worcester, ma woodman1@xxxxxxxx Main 508-853-1482 Fax 508-853-1480 ----- Original Message ----- From: "David Lessard" <mr_fixit@xxxxxxxxxxxx> To: <techassist@xxxxxxxxxxxxx> Sent: Monday, December 08, 2003 2:21 PM Subject: [TechAssist] Re: Zenith TV Z35X21D - Dead/Intermittent > Dooh...forgot to note QX3401 transistor orientation, (I think the > transistor front was facing the SMPS transformer, could anyone confirm > this please. I did order a new STR53041, (just in case). BTW the HOT > checked OK. Queston: Wouldn't a defective flyback cause the HOT to short > before stressing out the power supply (and ruining those components > mentioned)? Thanks. > > David Lessard > > Alexandria Electronics > 50 Harrison Street > Alexandria, Ontario > K0C-1A0 > > mr_fixit@xxxxxxxxxxxx > > > -----Original Message----- > From: techassist-bounce@xxxxxxxxxxxxx > [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Bob@Bobs tv > Sent: Monday, December 08, 2003 2:09 PM > To: techassist@xxxxxxxxxxxxx > Subject: [TechAssist] Re: Zenith TV Z35X21D - Dead/Intermittent > > David, > Replace the transistor and the IC together...note how transitor > comes out as some of the boards are marked WRONG......Part #'s on my > precious post..No voltages on print for the regulator. You may need > these > parts listed, Make sure the output transistor is not shorted.....You > could > also have a bad fly.. > RX3406 and 07 47/1W > RX3403 15/3W > RX3409 4.7 1/2W > RX3408 22/1/2W > D3406,07,09 103-344-02A > > Hope this helps > > Bob, > > Bobs TV Worcester, ma > > woodman1@xxxxxxxx > > Main 508-853-1482 > Fax 508-853-1480 > ----- Original Message ----- > From: "David Lessard" <mr_fixit@xxxxxxxxxxxx> > To: <techassist@xxxxxxxxxxxxx> > Sent: Monday, December 08, 2003 1:52 PM > Subject: [TechAssist] Re: Zenith TV Z35X21D - Dead/Intermittent > > > > I just got back from the customers home. CX3416 checked good, replaced > > it anyway. Qx3401 shorted C-E, front popped off. RX3406 burnt (beyond > > recognition). Not sure if ICX3431 is dead, main fuse is still intact. > > Does anyone have a good one kicking around so that I may compare pin > to > > pin readings? Is it possible that ICX3431 is still functional? How > could > > I check this? Thanks in advance. > > > > David Lessard > > > > Alexandria Electronics > > 50 Harrison Street > > Alexandria, Ontario > > K0C-1A0 > > > > mr_fixit@xxxxxxxxxxxx > > > > > > -----Original Message----- > > From: techassist-bounce@xxxxxxxxxxxxx > > [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Bob@Bobs tv > > Sent: Monday, December 08, 2003 12:49 PM > > To: techassist@xxxxxxxxxxxxx > > Subject: [TechAssist] Re: Zenith TV Z35X21D - Dead/Intermittent > > > > David, > > When you first check the set, with set off check for 130V at > the > > collector of horizontal output.. {I use tuner ground} if its there. > The > > 22uf > > and 100uf in the power supply should take care of this.. If the 130V > is > > missing you have other problems. Listed below are most common faults > > CX34123 22uf/63 > > CX3416 100/25>>>sub to at least 50V > > RX3404 180K 1/2W > > QX3401 121-3401 > > IXC3431 223-28 > > If you want me to send a JPEG of power supply let me know.. > > Bob, > > > > Bobs TV Worcester, ma > > > > woodman1@xxxxxxxx > > > > Main 508-853-1482 > > Fax 508-853-1480 > > ----- Original Message ----- > > From: "David Lessard" <mr_fixit@xxxxxxxxxxxx> > > To: <techassist@xxxxxxxxxxxxx> > > Sent: Monday, December 08, 2003 11:55 AM > > Subject: [TechAssist] Zenith TV Z35X21D - Dead/Intermittent > > > > > > > Gentlemen, > > > > > > I need to gather components before visiting this sick TV. Customer > > > indicates TV was intermittent before finally failing altogether. > When > > > intermittent shutdown did occur, shutting off the TV for 30 minutes > > > would allow it to fire back up. This sounds like a capacitor acting > up > > > but which one(s) and now that the TV is dead - dead, what else > should > > I > > > bring on this job. God Bless America (North & South). Thanks in > > advance. > > > > > > David Lessard > > > > > > Alexandria Electronics > > > 50 Harrison Street > > > Alexandria, Ontario > > > K0C-1A0 > > > > > > mr_fixit@xxxxxxxxxxxx > > > > > > > > > > > > ************************************************************************ > > **** > > * > > > Lost Password: > > > http://www.tech-assist.org and select "Login Problems?". > > > Email Archives: > > > //www.freelists.org/archives/techassist/ > > > > > > > ************************************************************************ > > ***** > > Lost Password: > > http://www.tech-assist.org and select "Login Problems?". > > Email Archives: > > //www.freelists.org/archives/techassist/ > > > > > ************************************************************************ > **** > * > > Lost Password: > > http://www.tech-assist.org and select "Login Problems?". > > Email Archives: > > //www.freelists.org/archives/techassist/ > > > ************************************************************************ > ***** > Lost Password: > http://www.tech-assist.org and select "Login Problems?". > Email Archives: > //www.freelists.org/archives/techassist/ > > **************************************************************************** * > Lost Password: > http://www.tech-assist.org and select "Login Problems?". > Email Archives: > //www.freelists.org/archives/techassist/ > ***************************************************************************** Lost Password: http://www.tech-assist.org and select "Login Problems?". Email Archives: //www.freelists.org/archives/techassist/