Announcement

Collapse
No announcement yet.

how to reduce backlight volts/current JVC LT-49C550

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    how to reduce backlight volts/current JVC LT-49C550

    This model had backlight strips replaced 6 months ago and reduced backlight from 10 to 5. You have guesses it, the customer despite my advice turned it back up to 10 so now backlights have failed.
    I have reapired the TV and checked the voltages feeding each strip and I would like to know how to reduce the voltage /current feeding the 2 backlight loops. The chip used on this UMC TV is 0cp8128 please see the enclosed picture of the data sheet.
    Attached Files

    #2
    Re: how to reduce backlight volts/current JVC LT-49C550

    sorted
    i doubled the value of r14 and r9 reducing backlight current by 30% this should stop the leds from being driven flat out
    i still have acceptable pic even with menu set at 6 for b/l
    shame no one seemed interested

    Comment

    Working...
    X