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TV Chassis Philips FL4.26 Flybacktrafo/Blurred image.

 
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Baeteman
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PostPosted: Fri Feb 03, 2006 2:34 am    Post subject: TV Chassis Philips FL4.26 Flybacktrafo/Blurred image. Reply with quote

After replacement of the Hor. Flybacktrafo by a non-original
type (HR Diemen), the set had sync probs and blurred image
for the first half hour.
300 Hz hum on +5V derived from Flyback. (pin 17)
Cause: parasitic oscillations in regulator circuit. (LM 358)(comp.7551)
Remedy: Decoupling the inverting input of the device with 470 nF ceram.
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