Samsung S5250 Light Problem Solution Jumper Ways
Samsung S5250 Light Problem Solution Jumper Ways
Good day, I again brought the phone Samsung Wave 525 GT-S5250 with another workshop. The fault has been quite interesting, a lot of phone consumed rather when power was practically in “short”.
But the oddity was that if you turn off the display, consumption disappeared and the ammeter was evident that the phone is switched on, but also to excessive consumption. After a visual inspection and palpation of components found burned diode D500 and U500 converter strongly basking in the scheme of illumination. Markings on the inverter U500 – BMBHC, no information on it has not found its inclusion scheme analyzed, decided to replace it with a time-tested long LTYN, especially since almost all pinouts are identical, except the 5th output BMBHC, on LTYN it was not. The new version of the connection, the Schottky diode connected between 1 and 5-pin BMBHC, as shown in the figure.
Removing burnt items U500, D500 and L500 (just in case), connect the phone without a display and measured the voltage at C500 (backlight inverter output) was 18 volts.
Connect the display and was again short, began to understand what is the problem lies. Removed the display and sealed-off backlight LEDs checked. Started prozvanivat chain from the connector contacts to podpayki LED backlight and found that one of their contacts sitting on common wire.
It turned out that under the protective cover, hit the sand and grit one selling plume resulting in one of the conclusions of the backlight has closed on the case.
Eliminating circuit, turn the phone on with the normal consumption and bright light. So, it would seem a little grain of sand, and’ve done such cases. Be careful when using the phone on the beach, do not throw them anywhere, it will save you money and save you from costly repairs.
