Nokia 8208 Service Manual page 104

Receiver Check from RF to DVGA
Cellular band
Input RF
Range 1700 ~4500
PCS band
Input RF
Range
RF RX voltage checking
Steps
1. Set up the main board in the module jig. The phone should be in FTM mode.
2. Check the following:
Test
Description
Point
1 RX_2.85V
2 RX_2.85V
3 RX_2.85V
4 MSMP_2.6V
5 RX_2.85V
6 CELL0_LNA_BIAS
Page 4-16
DVGA LNA 0
-90 -90
50 ~ 175
Table 20 Receiver check from RF to DVGA (Cellular band)
DVGA
-90
1900 ~ 4000 120 ~ 270
Table 21 Receiver check from RF to DVGA (PCS band)
2.85V
2.85V
2.85V
2.6V
2.85V
0.8V
Table 22 shows the Tx DC test points shown in Figure 43
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LNA 1
-70
110 ~ 310 280 ~ 440
Unit: dBm
LNA 1 LNA 2
-90 -50
310 ~ 430
Value
U403,U205
U403,U205
U403,U205
U403,U205
U403,U205
U205
RF Troubleshooting
Unit: dBm
LNA 2 LNA 3
-50 -30
430 ~ 650
LNA 3
-40
455 ~ 600
Check component
RM-384
Issue1