Read Sharp LC-50LE761K Service Manual online
22
LC-42/50LE762
LC-42/50LE761
LC-42/50LE760
CHAPTER 6. TROUBLESHOOTING
[1] Troubleshooting
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15.Software Update
15.1 Main SW update
In MB90 project there is only one software. From following steps software update procedure
can be seen:
1. MB90_en.bin, mboot.bin and usb_auto_update_mb90.txt documents should copy directly
inside of a flash memory(not in a folder).
2. Insert flash memory to the tv when tv is powered off.
3. While pushing the OK button in remote control, power on the and wait. TV will power-up
itself.
4. If First Time Installation screen comes, it means software update procedure is successful.
16.Troubleshooting
A. No Backlight Problem
Problem: If TV is working, led is normal and there is no picture and backlight on the panel.
Possible couses: Backlight pin, dimming pin, backlight supply, stby on/off pin
BACKLIGHT_ON/OFF pin should be high when the backlight is ON. R119 must be low
when the backlight is OFF. If it is a problem, please check Q10 and the panel cables. Also it
can be tested in TP69 in main board.
1. No Backlight Problem
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