Acer 41AS551V AC511 Service-Handbuch - Seite 15

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1.NO SIGNAL ON SCREEN

CHECK VIDEO IC801 VCC ABOUT 8V

CHECK THE OUTPUT VOLTAGE

OF IC801 PIN 13, 15, 18 ABOUT 3Vpp

CHECK THE B+ VOLTAGE OF

VIDEO PCB ABOUT 80V

CHECK THE VOLTAGE OF CRT

CATHODE ABOUT 40Vpp

CHECK THE VOLTAGE OF FBT SCREEN

ABOUT 400V TO 700V

LESS THAN 400V

EXCEED 700V

6-2 ABNORMAL DISPLAY

CHECK THE 80V RELATIVE CIRCUIT

CHECK FBT & CRT RELATIVE CIRCUIT

OR REFER ITEM 6-1

CHECK THE 12V PIN

OF P802 CONNECTOR

CHECK THE RELATIVE CIRCUIT

OF IC801 PIN 2/PIN 16 Vcc CIRCUIT

OF SMPS ON MAIN PCB

CHECK THE IC802

RELATIVE CIRCUIT

CHECK FBT RELATIVE CIRCUIT