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Maintenance Service and Trouble shooting
Check to see if the deflection
yorks are connected, C433 is
open or weldless. Inspect
peripheral component of N402
I27V
power supply
Inspect N204
and peripheral
components of
N204
Change N204 and
repair circuit
Yes
No
Yes
No
Check to see if the voltage
of pin 15 and pin16 of
N204 is normal
Check to see if voltage of pin6 at
N402 is normal
Yes
No
Make R328 open. Multimeter is at range R
Χ
1K. Red
probe connects to ground. Touch No.5 of N402 with
black probe. Bright line flashes for a moment
Horizontal bright line
3
Normal
and N402 itself
4.
Enter D-MODE or enter
S-MODE with c
remote controller
19
Snowy noise exist
No sound and picture
Not exist
Exist
Check to see if RAGC is
at 00 mode
Check to see if voltage
output available at tuner
ustomer
. Make
RAGC tuned to 25 or so.
Noise on picture just
Inspect V101
、
Z101
、
N204and
PIF
rt
Yes
No
Antenna
or tuner is
abnormal
Inspect the
circuit from
CPU to tuner
Yes
No
pa
disappears.