LG RAT375 - Page 18

3-3
No 12 V
Is Vcc
(15 V) supplied to Q953
collector?
Check or replace D921.
YES
YES
NO
Is the
13 V Supplied to Q953
base?
Check the power CTL “H” signal
from μ-COM.
YES
NO
Check or replace Q953.
No 5 V
Is Vcc
(6 V) supplied to IC951
Pin1?
Check or replace D923.
YES
YES
NO
Check
IC951 Pin4 "H".
Check the power CTL
“H”’ signal from μ-COM.
YES
NO
Check or replace IC951.