Reported as TV not turning on and power supply squealing.
Check all transformer output diodes and not shorted.
Schematic and service manual in this thread https://www.badcaps.net/forum/showth...ight=40PFL4908
Disconnected power supply outputs and there is a very quick squeal when plugged in. AMP+13V and P-ON+21V measure half their expected output.
Bridge rectifier diodes test ok. Fuse F602 not blown. Main switching transistor Q601 not shorted. Measuring 168V on drain (expecting 292V from schematic) so the input is half as well.
Will need to check all the components going to FET of the drain and input of the transformer.
40PFL4908/F7
Check all transformer output diodes and not shorted.
Schematic and service manual in this thread https://www.badcaps.net/forum/showth...ight=40PFL4908
Disconnected power supply outputs and there is a very quick squeal when plugged in. AMP+13V and P-ON+21V measure half their expected output.
Bridge rectifier diodes test ok. Fuse F602 not blown. Main switching transistor Q601 not shorted. Measuring 168V on drain (expecting 292V from schematic) so the input is half as well.
Will need to check all the components going to FET of the drain and input of the transformer.
40PFL4908/F7
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