Philips 107B7 用户手册

 

30

 
 

No Signal On Screen 
 

 

CHECK FBT RELATIVE CIRCUIT

 

LESS THAN 400V

OK

 

NG

 

NG 

OK 

OK

 

NG

 

OK

 

NG

 

CHECK THE OUTPUT VOLTAGE

 

CHECK THE VOLTAGE OF 

 

CHECK THE VOLTAGE OF CRT

 

CATHODE ABOUT 40Vpp

 

CHECK THE VOLTAGE OF FBT SCREEN

 

CHECK THE RELATIVE CIRCUIT

 

CHECK THE 5V PIN 

ON MAIN PCB

RELATIVE CIRCUIT

OF P802 CONNECTOR

 

ABOUT 400V TO 700V

 

EXCEED 700V

CHECK FBT & CRT RELATIVE 

 

CHECK VIDEO IC801 VCC ABOUT 5V 

OF IC801 PIN 19, 20, 21 ABOUT 3Vpp

 

CHECK THE IC802

OF IC801 PIN 10/PIN 18 Vcc CIRCUIT

CIRCUIT OR REFER ITEM 6-1

 

VIDEO AMP ABOUT 80V

 

CHECK THE 80V RELATIVE CIRCUIT