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4.4.3 PAM Control Signal part
CHECKING FLOW
Check Control
Signals
Signals are
Normal ?
Yes
PAM Control Signal
is OK.
See next page to
check
ASM & Mobile SW
Circuit.
C400
68p
VBAT
ECCH0003002
C2012JF1A106ZT
C407
C408
C405
C406
C409
0.01u
0.01u
0.01u
39p
10u
L411
15
3
DCS_PCS_OUT
DCS_PCS_IN
C415
3.3nH
C417
11
4
U400
EGSM_OUT
EGSM_IN
0.5p
1p
SKY77318
19
18
RSVD_GND
ENABLE
21
1
P_GND
BS
L410
C419
2.7nH
C421
DNI
0.5p
< PAM Control Circuit>
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
No
Check
Locosto(U102)
②
①
Tx Ramp
R400
TX_RAMP
15K
close to DBB
L400
3.3nH
C402
C403
VDDRF1
1.5p
1.5p
L401
1nH
C410
15p
C412
180p
L403
18nH
②
C413
R403
10
L404
47p
C418
①
DNI
C414
10nH
1.5p
R404
47
PA_EN
R405
47
PA_BAND
C422
C423
0.5p
27p
-39-
SW400
< PAM Control Placement>
TXHB
①
②
TXLB
< PAM Control Wave >
- 43 -
4. TROUBLE SHOOTING
U102
X101
FL400
U400
②
①
Tx Ramp
PA Enable
LGE Internal Use Only
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Table of Contents
Troubleshooting
