Haier 21FA18-T Service Manual page 27

3
Yes
Check to see if the voltage of
pin 15 and pin16 of N201 is
normal
Yes
Change N201 and
repair circuit
Normal
4.
Not exist
Check to see if RAGC is
Yes
Enter D-MODE or enter
S-MODE with customer
remote controller. Make
RAGC tuned to 25 or so.
Noise on picture just
disappears.
Horizontal bright line
Make R328 open. Multimeter is at range RΧ1K. Red
probe connects to ground. Touch No.5 of N401 with
black probe. Bright line flashes for a moment
No
Inspect N201
and peripheral
components of
N201
at 00 mode
Inspect V101、
Z101、 N20and PIF
part
Check to see if voltage of pin6 at
Yes
Check to see if the deflection
yorks are connected, C433 is
open or weldless. Inspect
peripheral component of N401
and N401 itself
No sound and picture
Snowy noise exist
No
Yes
or tuner is
abnormal
25
No
N401 is normal
Inspect +27V
power supply
Exist
Check to see if voltage
output available at tuner
Inspect the
Antenna
circuit from
CPU to tuner
No
No