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Service Manual
Model No.:
Pictur e 7
TV no searchin/no image
Function unit(DTV video r eakdown)
Whether external RF
input signal is normal
N
Y
Whether main oard testing TP6point got 3.3V
Y
N
Check and
repair
peripheral
Check R6 or R7
RF equipment
whether there is I2C data
Y
N
Whether R50 or R51
got intermediate-frequency signal
N
Y
Check the tuner 5
(TDA18273 )and the main
chip 10(MSD318)
circuit etween the
N
Y
Check and
Check whether
repair the
Check the tuner
I2C network
power
Check and repair
5(TDA18273)
pull-up voltage
Check 10
supply
this connecting circuit
related circuits
is normal
network 4
peripheral circuit
circuit of
this pin
-
-
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