Haier 21F8A - Page 19

17
Abnormal
Maintenance Service and Trouble shootin
g
Check the horizontal oscillation external
circuit of Z280 N201 and N201
N
ormal
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 betwec
n
b
ace electrode an
d
connector electrode of v411
Check the circui
t
between pin 32 at N210
and H drive grade
Check all
voltages of pins
at X602
The heate
r
resister is
broken.
Check the connecto
r
electrode voltage o
f
V411
There is breakdown in horizontal
drive grade, Check V444 T401
R437
Check if FBT T402
V411or C415 C416 are
leakage of electricity
Check if pin 28
voltage 9V a
t
N201 is normal
Rechange ba
d
components o
r
remedy conten
t
circuit.
Check 9V powe
r
No
rm
a
l
Abnorma
Normal
Abnormal
N
ormal
Abnormal
A
b
n
o
rm
a
l
Yes
No
Lower
Normal
Normal
Abnormal
V411 is rosin joint o
r
b
roken