- Jul 20, 2019
- 19
- 16
FASTEST REPAIR BACKLIGHT LED DRIVER STEPS WITHOUT SCHEMATICS
MYLABS — Postimage.org
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CMIIW
DENBAGUS METRIXFLASHER
- FIND SERIAL DIODE FIRST NEAR LCD CONNECTOR OR PMU BLOCK
- THE SERIAL DIODE CONNECTED WITH SERIAL INDUCTOR
- THE BOTH OF THEM HAS THE SAME LINE AND VOLTAGES WITH VBATT OR VPH_POWER
- FIND THE PULLDOWN RESISTOR ( RESISTOR WHICH ONE OF IT PIN CONNECTED TO THE GROUND ) ARROUND THE UNIT / LED DRIVER IC AS ENABLE /BL_PWM
- CHECK THE SERIAL DIODE CONNECTED TO THE PIN OF LCD CONNECTOR OR RESISTOL (SERIAL) NEAR LCD CONNECTOR
- MAKE A JUMPER CABLE FROM CATHODE (SERIAL DIODE) TO VOLTMETER AND SET VOLTMETER IN 50V DC
- SET POWER SUPPLY TO 4.0V THEN CONNECT TO THE VBATT CONNECTOR AS POWER SOURCE
- SET ANALOG MULTI TESTER IN 1X OHM CALIBRATION THEN PUT THE RED PROBE TO THE GROUND, AND THE BLACK PROBE POINTED TO THE PULLDOWN RESISTOR AS AN ENABLE FOR BL LED DRIVER
- THE DIGITAL MULTITESTER WILL SHOWN THE VOLTAGE VALUE AS OUTPUT VOLTAGE FROM BL LED DRIVER BOOSTER REGULATOR ... ABOUT 15-30V
MYLABS — Postimage.org
POST THE RESULT
CMIIW
DENBAGUS METRIXFLASHER
