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5
˅
TV failure
TV no channel
Check if there is RF
signal input
Y
Check if there is
+5V at PIN2 of
U24
N
Y
Y
Y
N
Check the power
supply circuit to
this PIN
Check if there is
intermediate
frequency signal
output at PIN12 of
U24
Check if there
is I2C signal
at PIN6 &
PIN7 of TUNER1
Check the I2C
circuit
between
U11 and
U24
Check the
tuner
Check the signal
circuit between
U11 and U24
Fix the RF
set
N
Summary of Contents for MSD318
Page 19: ... 17 ...
Page 27: ...7 Electrical parts 7 1 Block diagram 25 AMP Headphone Coaxial 1 2 MSD318QT Main IC ...
Page 38: ...8 TV OPERATION 36 ...
Page 39: ... 37 ...
Page 40: ... 38 Press ENTER Key To Select ...
Page 41: ... 39 Press ENTER Key To Select ...
Page 42: ... 40 ...
Page 45: ... 43 9 Trouble shooting 9 1 Simple check ...
Page 47: ... 45 3 Panel display abnormally connector J9 is at normal level ...
Page 51: ... 49 7 PC no picture or picture abnormal ...
Page 52: ... 50 8 YPBPR AV no picture or picture abnormal Check Y ...
Page 59: ... 49 7 PC no picture or picture abnormal ...
Page 60: ... 50 8 YPBPR AV no picture or picture abnormal Check Y ...