Nokia 3806 Service Manual page 85

RM-583
Service Tools
1- Micro USB connector
2- CN5 & CN7 for current meter (0~1A)
3- CN4 & CN6 for backup power supply
4- CN3 Main power supply (Vcc: 6.5V~7.5V)
5- RF connector
6- UIM slot
7- S2 switch for download and test mode (will be removed in MP stage)
8- S3 switch for power on and off
9- S1 switch for current measurement
10- S4 switch for main power and backup power supply
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