Signal Repairing Guide

This is other guide for you to repair your mobile phone hardware. Below is guide table to find signal problem way out. Check its out.

Signal Problems

Indications	Cause of damage	Way Out
Signal go up and down, even be lost. There is no signal although looked for manually	LNA receiver amplyfier not working correctly Duplexer system	LNA of Nokia DCT-4 and WD-2 are joined with RF Processor Change the antenna switch
No signal, but if looked for manually be found, however when we choose one of the network, it can't registered	Receiver system not working correctly	LNA of Nokia DCT-4 and WD-2 are joined with RF Processor IC
After about 3 second, the signal suddenly be lost. If looked for manually be found, however when we choose one of the network, it can't registered	Receiver system not working correctly Modulation system not working correctly	Change PA IC Change RF IC