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darialjr
Joined: 22 Feb 2009 Posts: 2
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Posted: Sun Feb 22, 2009 12:39 am Post subject: TC14L10M |
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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
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Posted: Sun Feb 22, 2009 1:14 am Post subject: |
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Location number of zener? |
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vtech
Joined: 08 May 2006 Posts: 1264 Location: USA
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Posted: Sun Feb 22, 2009 6:15 am Post subject: |
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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
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Posted: Tue Feb 24, 2009 9:11 am Post subject: TC14L10M |
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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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