Haier HT-3768, Service Manual

Page: 23 / 38

C41 en
to H-drive
2
No raster
Whether G2 voltage is normal
Abnormal
Normal
Test flament voltage Test the base voltage of V444
Normal Abnormal
Normal
Abnormal
Check to see if b.e
voltage of V411 is
existed?
Heater Resistor
open
Check the voltage
of all pins of XS603
is normal
Check the circuit
from pin13 of N201
Abnormal
Abnormal
Normal
Normal
Test flament voltage Test the base voltage of V444
Check the voltage
of V432 collector is
normal
Video amplifying
board is abnorma
l
InspectT401 R437
etc
.
Inspect the circuit
from pin50 52
51 of N204 to
video amplifying
Lower
Higher
T402 V432 or
5 1are brok
V411 is not well
welded or open
Abnormal Normal
Check to see if +9V
voltage is normal at
No.17 of N204
Change wrong component
or check
Abnormal
Normal
Check +9V power supply
Check Z901 N201 and
peripheral circuit of N201
23