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Sharp reciever power supply problem, Help

 
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tedy
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PostPosted: Mon May 30, 2005 4:10 am    Post subject: Sharp reciever power supply problem, Help Reply with quote

Hi, I have got a sharp reciever, but now it's dead. there is no any power. when i checked it, there is power up to primary of the power supply but there is no any power in the secondary. what can be the fault. help me plz.
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Bradz1234



Joined: 30 May 2005
Posts: 1
Location: California

PostPosted: Mon May 30, 2005 6:58 pm    Post subject: power supply question Reply with quote

Hi

when you say primary of the power supply, what specifically?

Is this a switching or linear supply?

Usually Ive found that a regulator has croaked along with some large resistor in its nearby vicinity.

Other times if its a smart machine, it will use a serial data bus to the power supply, and all major components in the circuitry and if something is zapped it will tell the power supply to stay OFF.

In that case, a section that does heavy current work like audio output could have a shorted stage keeping the power supply off.
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tedy
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PostPosted: Tue May 31, 2005 3:55 am    Post subject: Reply with quote

hey thanks for help the power supply is switch mode power supply. Now the problem is that there is power present in the primary stage but there is no any power in the secondary, so the reciever is not getting power. help plz
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PostPosted: Wed Jun 01, 2005 5:02 pm    Post subject: Reply with quote

tedy
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tsgunnell



Joined: 03 Jun 2004
Posts: 49
Location: middx england

PostPosted: Wed Jun 01, 2005 5:17 pm    Post subject: Reply with quote

hello tedy could you please state what model it is.but for now you could start checking the resistors to find whether the start up circuit is working
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tedy
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PostPosted: Fri Jun 03, 2005 1:13 pm    Post subject: Reply with quote

the model of the reciever is Sharp, AF7001.
tedy
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tedy
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PostPosted: Tue Jun 07, 2005 3:55 am    Post subject: Reply with quote

help me plz, i am getting voltage in the primary of the power suply but nothing at secondary. the model of the reciever is Sharp, AF7001.
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