Tx Dc Test Points - Nokia 7088 Troubleshooting Manual

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Tx DC Test Points

Figure 7: Bottom side Tx DC test points
Table 3 shows the Tx DC test points shown in Figure 7.
Test Description
Point
1 VREG_MSMP,C861 2.96V
2 VPH_PWR,C854
3 VREG_MSMC,C860 1.91V
4 VREG_MSMA,C858 2.62V
5 VEXT_DC,R840
6 VREG_TCXO,C857
7 VREG_RFRX,R855
8 VREG_RFTX,C856
Table 3: Tx DC Test Points and RF Supply Line Resistance to Ground
*Note: Always measure resistance with the phone powered off
Issue 1 11/2006
Value
3.2~4.2V >550kΩ to ground U632,U7
3.2~5.7V ~9.3kΩ to ground
2.82V
2.66V
2.64V
© 2006 Nokia Corporation
RF Description and Troubleshooting
RF Supply Lines Resistance to
Ground
>11kΩ to ground U632,U631,U629,U1
>45kΩ to ground U632,U625
>120kΩ to ground U632,U625
Q400
>450kΩ to ground U632
>350kΩ to ground U632,U631,U629
>450kΩ to ground U632,U631,U629
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7088 (RM-219)
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