Figure 4-6-1. Power for Radio ASIC
f
Figure 4-6-2. Schematic (Power)
2.8V OK?
No
Yes
1.8V OK?
Yes
No
Check the AB3100
Check the AB3100
Check Point
LDOE_OUT (C303)
Common Input Power is OK
See The Next Part
Check Point
LDOA_OUT (C303)
4.16.4 Step 4: Checking VCC
(Bottom)
AB3100
TP06
C305 (LDOE_OUT)
TP05
C303 (LDOA_OUT)
AB3100
TP05
C303
(LDOA_OUT)
VDDA_2V8 (RF3300 analog)
VDIGRAD_1V8 (RF3300 digital)
TP06_RF
C305 (LDOE_OUT)
- 136 -
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
REV.F
K13
LDOA_OUT
L12
LDOD_OUT
LDOE OUT
G14
EXT_LDO
C12
2.2u
C305
2.2u
C304
2.2u
C303
0
R306
EXT_LDO
AB3100
TP05
C303 (LDOA_OUT)
VDDA_2V8 (RF3300 analog)
TP06_RF
C305 (LDOE_OUT)
VDIGRAD_1V8 (RF3300 digital)