BN44-00422A BN44-00423A Schematic - Samsung LED LCD TVs Models UN46D6003SFXZC UN40D6003SFXZA UN40D5500RF - Used
Semiconductors: SPC7011-FA5695 – FSFR 1700XSL – D2011K – TK8A50D(FET)
Circuit Diagram (Schematic)
Click on the schematic to magnify
The
output for driving LEDs behaves like a current source 300mA approx. It means that the current is being constant
and is the output voltage which varies. This can even down to 118V. When there is insufficient load on the
output, LED source hiccups. (From 800 ohm approx.) Hiccups manifests: DRV output. is led + active
and up to 322V (fully unloaded). At that
time all the source is turned off with a voltage high (3V approx.) per pin 9,
which immediately returns to 0.1V. However the source Drv. led + takes about seconds
to restart. The sample OVP reaches composed leg 12. But if you register short, it is completely
inhibited, both Drv. LED +, as Drv. LED- (0V on both outputs) and as the short
disappears, the source restarts. When
you register short, pin 6 up to 11.2V. 14 down to 2V. The maximum current is around 0.33A, when Drv
output. LED + is so minimal, surpassed only by 3V to the input source.
