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17” CDT Color Monitor 107B7
30
7-2. Abnormal Display
No Signal On Screen
CHECK FBT RELATIVE CIRCUIT
LESS THAN 400V
OK
NG
N
G
O
K
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
A
BOUT 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 CIRCUI
T
CIRCUIT OR REFER ITEM 6-1
VIDEO AMP ABOUT 80V
CHECK THE 80V RELATIVE CIRCUIT