Troubleshooting Flowchart - ViewSonic E70-3 Service Manual

E70-3 Service Manual
9. TROUBLE SHOOTING FLOW CHART
NO RASTER
9-1,
POWER SUPPLY
UNIT
ITEM 9-10 OK
FILAMENT
LT
ee eee CRT SOCKET
NO LIT OR
CRT FAILURE
TURN THE SCREEN
VR TO RIGHT
CHECK SCREEN(G2)
VOLTAGE
RANGE: 450~700V
-
1.62 WIRE TO VIDEO
PCB DISCONNECT
TOOuew 2.FBT T403 FAILURE
3.CRT FAI
ae CRT FAILURE
VIDEO B*
SHALL BE 75V
-14- 1/17/2000
ViewSonic Corporation
CHECK
CHECK C424
Br
NO
CHECK H.V
OPERATION
CHECK
CRT FILAMENT
VOLTAGE 6.3V
SHALL BE 65V
AT 31KHz MODE
CHECK H.OSC
H.DEF
HV CIRCUIT
SEE ITEM 9-5
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a