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TC14L10M

 
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darialjr



Joined: 22 Feb 2009
Posts: 2
PostPosted: Sun Feb 22, 2009 12:39 am    Post subject: TC14L10M Reply with quote
The RM25 Zener Diode always shorted I measured the voltage across this diode its 68Vdc, the zener is only 55vdc. Can someone tell me what should I check.?
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jts1957



Joined: 24 Nov 2008
Posts: 2476
Location: Far, Far Away
PostPosted: Sun Feb 22, 2009 1:14 am    Post subject: Reply with quote
Location number of zener?
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vtech



Joined: 08 May 2006
Posts: 1264
Location: USA
PostPosted: Sun Feb 22, 2009 6:15 am    Post subject: Reply with quote
Do not have the specific schematic but, if this diode happens to be located in the secondary of a chopper power supply, the most likely culprit is the opto-isolator or something in the feedback line.
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darialjr



Joined: 22 Feb 2009
Posts: 2
PostPosted: Tue Feb 24, 2009 9:11 am    Post subject: TC14L10M Reply with quote
The location is in secondary of chopper transformer, D835 in schematic I will try first to replaced the 47uf/50v in power supply are, and the SE090 error amp. in feedback area.
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