Haier HT-3768 Service Manual page 23

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