LG LSS-3200A Service Manual page 34

(D) CS check
Logic low pulse is seen at R138?
Fig. 05
YES
Logic low pulse is seen at R140?
YES
Logic low pulse is seen at R144?
YES
Logic low pulse is seen at R143?
Fig. 05
R138(1) : Flash CS signal
NO
Check IC101, 104, 105
NO
Check IC101, IC400
NO
Check IC101, IC800
NO
Check IC101, IC201
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