LG -ID3100 Service Manual page 51

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