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2
Normal
Abnormal
Video amplifying
board is abnorma
l
V433 is not well
welded or open
T431
、
V433 Or
C415
、
C416 Care
broken
Higher
Lower
Inspect the circuit
from pin19
、
20
、
21 of N201 to
video amplifying
board
Check the voltage
of V433 collector is
normal
InspectT431
、
R434
etc
.
Normal
Abnormal
Normal
Abnormal
Abnormal
Normal
Normal
Abnormal
Abnormal
Normal
Check the voltage
of all pins of XP902
is normal
Heater Resistor
open
Check to see if b.e
voltage of V433 is
existed?
Check the circuit
from pin13 of N201 to
H-drive
No raster
Whether G2 voltage is normal
Re
place bad cmponents
Check N201
Check N201 and
H-Vibration
Check +12V power circuit
Abnormal
Normal
Maintenance Service and
Trouble Shooting
Check heating voltage
Check base voltage H-drive