The RF signal is normal.?
TN1 supply power normally ?
th
th
The 4 and 5
pin
of TN1 have data?
PIN12 of TN1have
the output signal?
N
Y
N
Y
Y
N
In the TV mode, it don't
search tv and no picture
Getting rid of function's trouble
1.fuction part(TV video)
11
MANI
BOARD
FAULT
JUDGMENT
Y
N
Maintenance
E56
、
Q16
、
L9 and relative
c o m p o n e n t .
Maintenance TN1 and the
relative peripheral circuit.
Maintenance
U14
、
Q17
Maintenance
its
power supply circuit
In the PC mode ,have it ?
th
The 11 PIN of TN1 have output signal ?
Maintenance R302
、
C 1 8 6
、
C 1 1 6
N
Y
N
Y
In the TV mode, it don't
search tv and no picture
Getting rid of function's trouble
2.fuction part(TV audio)
TN1 have damaged
，
replace
the
TN1
Reference
service
flow
of
no
sound
Maintenance
The
RF signal is normal.
