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irs2092 strange problem
irs2092 strange problem
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Old 14th December 2016, 06:44 AM   #1
drakston is offline drakston
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Default irs2092 strange problem

hi everyone

I have two pcs of dx1000, both have problem with LO output at irs.You can see in attachments, TEK0000 is LO out and TEK0001 is HO. Pair of mosfets connecting to LO out are warming up very fast. I think both waveforms should be similar... can any one look at this schematic and check what can be to mess up? I change IRS, TC and mosfets - no results

here is link to schematic http://dx-audio.pl/files/dx1000-schemat.pdf
Attached Images
File Type: jpg TEK0000.JPG (74.5 KB, 114 views)
File Type: jpg TEK0001.JPG (75.9 KB, 114 views)
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Old 16th December 2016, 07:06 AM   #2
effebi is offline effebi  Italy
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What is the use of LED2?
Did you try to remove it?
Are you using the recommended power supply values?
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Old 16th December 2016, 07:39 AM   #3
drakston is offline drakston
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Led2 is simple signalization of "POWER ON AMP". Yes I remove this led - nothing change, olso yes I using 2x95VDC.
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Old 18th December 2016, 05:09 PM   #4
nigelwright7557 is offline nigelwright7557  United Kingdom
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I might have missed something but how is VCC supplied ?
If that is missing you wont get LO output.
If should be between 12 and 15 volts relative to B-.
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