22me402v led tv strobe light effect

[freakaftr8]

Re: 22me402v led tv strobe light effect

Would bl_sw and bl_adj be the equivalent?

[freakaftr8]

Re: 22me402v led tv strobe light effect

Considering this hai 7209pc stellar reputation for failure is there a way to inject the voltages directly to the led strip and bypassing the constant current circuit? How about pin shorting on the ic? I have a feeling something is wrong with the ic

[freakaftr8]

Re: 22me402v led tv strobe light effect

does anyone have a datasheet on the HAI 7209PC led controller ic?

[Redion]

Re: 22me402v led tv strobe light effect

Perhaps this could provide little more info on that IC https://www.badcaps.net/forum/showthread.php?p=359967

[freakaftr8]

Re: 22me402v led tv strobe light effect

Read it last night. Whats is going in there. Are they injecting raw voltage to the leds via stand alone inverter?

[freakaftr8]

Re: 22me402v led tv strobe light effect

Trying to get thus tv figured out still. I have consistent 45vdc going to the led strip center pin. The four outer pins are used for current sensing?

[freakaftr8]

Re: 22me402v led tv strobe light effect

well since this tv is so cheaply made and personally I really don't care I went a head and started doing some hack job mods. I took the current balancing pins which is essentially ground for the LED's and disconnected from the circuit and grounded them to the chassis. The LED still power up but I still have flickering. So now I'm trying to find a good 45 volt source of the power supply to apply the positive for the LED's direct anyone have any ideas?

[freakaftr8]

Re: 22me402v led tv strobe light effect

and my hack job appeared to work! Full brightness beautiful picture anyone wants to know how it was done I took a .33ohm resistor and put it across two pins. 10 and 11 off the hai 7209pc ic disabling the current sensing on the ic. Also removed a smd capacitor and resistor from the circuit but its not nessecary.

Heres the pic


http://i845.photobucket.com/albums/a...psb8978d1d.jpg

[freakaftr8]

Re: 22me402v led tv strobe light effect

Better pic

[freakaftr8]

Re: 22me402v led tv strobe light effect

Is it normal for the led strip ti get nice and toasty under full illuminaton?