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Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
YES
NO
Check or Replace the
D953.
NO
Check the CD CTL “H”
signal from µ-com.
YES
YES
Check or Replace the
IC951.
NO
Check or Replace the
D952.
NO
Check the P CTL “H”
signal from µ-com.
YES
Is the IC953
pin4 ‘H’?
YES
Check or Replace the
IC953.
No 3.3V
YES
NO
Check or Replace the
D955.
NO
Check the P CTL “H”
signal from µ-com.
Is the Vcc
(4.2V)supplied to
IC952 pin 1?
YES
YES
Check or Replace the
IC952.
No 5.0 V
No 9V
YES
Is the Vcc
(5.6V) supplied to
IC951 pin 1?
Is the IC951
pin4 ‘H’?
Is the Vcc
(10.5V) supplied to
IC953 pin 1?
Is the IC952
pin4 ‘H’?