LG VX5400 Service Manual page 53

Check if there is any major difference referring
Check if there is any major difference referring
SBDT
SBCK
Figure 4.1.2 (c)
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Only for training and serving purposes
Checking Flow
Start
Check pin24, 25, 26 at U111
To Figure 4.1.2 (c), (d)
NO
Redownload S/W
Check pin24, 25, 26 at U111
To Figure 4.1.2 (c), (d)
NO
Replace Main B /D
Checking Flow
Control signal is Ok . See next page
YES
Control signal is Ok . See next page
YES
Waveform
Waveform
Figure 4.1.2 (d)
-53-
to check RF signal path .
to check RF signal path .
SBST
SBCK
LGE Internal Use Only