LG-ID3100
LGE
LG Electronics Inc.
Checking Flow
SETTING : Attach the headset and
“
Listen to Radio
”
at Radio menu
Start
Check the Freq. at
TP1 of Q102
Freq.= 32.768kHz?
(Shown Graph 1)
X101 is working?
Check the TP2 of
X101.
Freq.= 32.768kHz?
Check the condition of Q102
and external component.
Replace X101
Audio signal
appear at
TP3,TP4?
Check the FM Receiver circuit,
input voltage, soldering.
If problem, replace the defected
component.
Audio signal
appear at TP5
and TP6 of
U104?
Check the FM AMP circuit.
If problem, replace the defected
component.
Refer to Earphone Trouble part.
Yes
No
Yes
Yes
Yes
No
No
No
Graph 1. FM Radio Clock
49/57
LGE Internal Use Only