Haier 21F99, Руководство по обслуживанию

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There is
breakdown in
CRT broad
Check circuit
between pin18
pin20 in N201
No raster
Check if G2 voltage on CRT board is normal
Check heater voltage
Check the base electrode voltage of V444
2.
Check the voltage
betwecn bace electrode
and connector electrode
of v411
Check the circuit
between pin 32 at
N20
1 and H drive
grade
Check all
voltages of
pins at X602 The heater
resister is
broken.
Check the connector
electrode voltage of
V411
There is breakdown in
horizontal drive grade, Check
V444
T401 R437
V411 is rosin joint
or
broken
Check if FBT T402
V411or
C415 C416 are leakage of
electricity
Check if pin
28 voltage 9V
at N201 is
normal Rechange bad
components or
remedy content
circuit.
Check the horizontal oscillation
external circuit of Z280
N201 and
N201
Check 9V power circuit
Normal
Abnormal
Normal
Anormal
Normal
Abnormal
Normal
Abnormal
Yes
No
Higher
Lower
Normal
Abnormal
Normal
Abnormal