Hello got this tv today no standby light totally dead until I checked voltages,which voltage readings on the psu seem to be all over the place
Any ideas ?
Any ideas ?
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Re: Technica M32/57G
All voltages or only 5VSB?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search. -
Re: Technica M32/57G
All of them tomComment
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Re: Technica M32/57G
OK, try unplugging power connector from main board and check 5V standby again.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Technica M32/57G
are they stable voltages or fluctuating? stable but off voltage points to caps,fluctuating would point to a output diode,or startup capfixed so far...376 lg lcd tv's,24 onn tv;s,24 panasonic lcd,16 jvc lcd,12 marshall jcm800 amps,refurb of various disco equipment lighting,old style disco decks ,and a flymo!
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please let us know if everything works ok if your tv gets fixed, as it will be and aid for anyone else having the same problem and wishing to fix it.it would save people clogging up this site with topics that are duplicated,and can be found easily using the search function.,and taking up valuable space.enjoy your fixed tv!,hopefully!Comment
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Re: Technica M32/57G
No voltages at allComment
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Re: Technica M32/57G
You should have at least one standby voltage.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Technica M32/57G
fluctuating multimeterComment
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Re: Technica M32/57G
voltage on main filter cap?,should be around 320 DCV plugged in and power onfixed so far...376 lg lcd tv's,24 onn tv;s,24 panasonic lcd,16 jvc lcd,12 marshall jcm800 amps,refurb of various disco equipment lighting,old style disco decks ,and a flymo!
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please let us know if everything works ok if your tv gets fixed, as it will be and aid for anyone else having the same problem and wishing to fix it.it would save people clogging up this site with topics that are duplicated,and can be found easily using the search function.,and taking up valuable space.enjoy your fixed tv!,hopefully!Comment
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Re: Technica M32/57G
I'd be focusing on the small electrolytics on the power board's primary side - possibly a bad startup capacitor.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Technica M32/57G
Sorry my bad
+5v= 2.9 steady
+5v= 2.9 steady
+5v SB =4.1 but fluctuating
+5v= 2.9 steadyComment
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Re: Technica M32/57G
Main 450v cap top left of psu reads 395v steadyComment
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Re: Technica M32/57G
Can you supply a close up picture of the power supply?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Technica M32/57G
Is that ok ?Attached FilesComment
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Re: Technica M32/57G
OK, I'd try replacing C27, C2? (C21 maybe, just below C27), C19 and C18.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Technica M32/57G
Right replaced c27, c 18, c 19 the red standby light came on then went to blue but cut out again so I then went a changed c21, cs 30 but still the sameLast edited by sordids999; 07-27-2014, 02:30 PM.Comment
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Re: Technica M32/57G
Do you now have steady 5V standby?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Technica M32/57G
ok replaced all these as above still nothing but just turned it back on to test the 5v standby and now its working tv all good
very strange didnt work first time i changed the caps ?Comment
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Re: Technica M32/57G
I'd soak test it for a while - you might have an intermittent fault somewhere.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Technica M32/57G
To be fair i run out of 22uf 50v caps so took two from a old board (maybe its them)so ill order some more
but thanks for your help tom again
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