Haier HTVF20R72, Руководство по обслуживанию

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Normal
Abnormal
Yes
No
4.
5
Cut of C601
，
connect red pen of multi-meter(R*1K)with
ground,and black pen tap Pin1 of N602 if there is snapping
Picture exists but no sound
Cut off collection electrode of V602,use
black pen of multimeter tap Pin1 of
N601 if there is snapping sound
Power amplifier is normal.
Check N101 and external SIF
circuit
Check muting circuit
and V601\V602
Check to see if
+19V exists
Check SIF circuit and speaker I19V
power supply
Replace CRT
、
Check ircuit between
Pin19 of N201 and
XS202
No
Yes
Change V902 or
weld V902 again
Check to see if voltages of XP902
are normal
Lack of red
Check to see if V902 is
open or not well welded
Maintenance Service and Trouble Shooting
Yes No