Haier HTR13 - Page 7

7
2
Normal
A
bnormal
Video amplifying
board is abnorma
l
T401, D402 or
C419,C420 are
broken
Q402 is not well
welded or open
Higher
Lower
Inspect the circuit
from pin51 、52、
53 of IC201 to
video amplifying
Check the voltage
of Q402 collector is
normal
InspectT402、R427
etc
.
Normal
A
bnormal
NO
YES
A
bnormal
Normal
Normal
A
bnormal
A
bnormal
Normal
Check the voltage
of all pins of SK501
Heater Resistor
open
Check to see if be
voltage of Q402 is
existed?
Check the circuit
from pin15 of IC201
to Q402
No raster
Whether G2 voltage is normal
Change wrong component
or check
Check to see if +8V
voltage is normal at
PIN 10 or 14 of IC201
Check X201、IC201 and
peripheral circuit of IC201
Check +8V ,+5V power
A
bnormal
Normal
Test filament voltage Test the base voltage of Q402
Maintenance Service and Trouble shooting