LG KG110 - Call Register Functions; Missed, Received, and Dialled Calls

34
4. TROUBLE SHOOTING
4.2.4 Check SAW filter
FL403
FL401
FL402
C441
~C446
3
G2
1
G1
5
G3
IN
2
Q1
4
Q2
6
856441
FL403
C442 56P
L408
33nH
C443 56P
C415 68P
L401
18nH
C416 68P
3
G2
1
G1
5
G3
IN
2
Q1
4
Q2
6
856417
FL401
C417 39P
L402
7.5nH
C444 100P
C418 39P
C445 100P
C446 100P
C441 100P
856520
C419 47P
L403
6.8nH
C420 47P
G_01
1
G_02
2
D_01
3
D_02
4
G1
5
G2
7
G3
8
G4
10
G_IN
9
D_IN
6
FL401
Output = -64dBm?
Check RF level of
SAW filter output
For GSM850 FL403.4 & F403.6
For EGSM FL401.1 & FL401.2
For DCS FL401.3 & FL401.4
For PCS FL402.4 & FL402.6
NO
Change the SAW filter
FL403 for GSM850
FL401 for GSM & DCS
FL402 for PCS
YES
Check RF level of
SAW filter input
For GSM850 FL403.2
For EGSM FL401.9
For DCS FL401.6
For PCS FL402.2
NO
Change the capacitor
C441 for GSM850
C444 for EGSM
C445 for DCS
C446 for PCS
Input = -61dBm ?
See next page to check
I/Q signal
YES
Figure 4-7