TV cannot scan
/
7. Function Trouble
7. Function Trouble
˄
˄
TV video
TV video
˅
˅
any channel/Picture
whether the external
RF input signal is normal
N
Y
N
Y
Check if pin No.7of T1(DVT-8C/T41F) is normal
Y
N
Check if pin No.6,7 of T1 has I2C data
N
Y
C
f
10 11 f 1
1
Check if pin No. 10,11 of T1 has IF signal to U71
N
Y
Check the
power circuit
of UP1(7805)
Check if pin No.9 of T1
has voltage(1.8 ~3.3V)
N
Y
Repair external
RF equipment
of UP1(7805)
Check the network between
UM1(pin No. M19,M20) and U71,
and if the demod power is OK.
Check the circuit
from U71(pin No.72)
toT1(pin No.9,
Change U71
Check I2C network
from T1(pin No.4,5)
to U71/5112
(pin No 68 69)
Change
T1
(pin No.68,69)
-83-
Summary of Contents for MT5311
Page 1: ...MT5311 Training Documents ...
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Page 8: ...1366 768 16 7M ATSC NTSC 10 75 m mts AC 3 ...
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Page 10: ...T MT5311 81B CNA2 CN5 CN22 CN18 CON1 CON2 ...
Page 11: ...T MT5311 81B T MT5311 81B 3 4 MINI AV IN SPDIF OUT LINE OUT 1 2 1 ETHERENT ...
Page 12: ...CNA2 CN5 CN18 ...
Page 13: ...CON1 NC Logic Level Control Default For High Level No Connection I2C SCL I2C SDA CN22 ...
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Page 17: ...TC315B601 ...
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