motorola Debug Guide free download

File name Debug_Guide.pdf

C168 Level 3 Debug Guide 10/31/05 V1.0 INDEX 1. Debug guide ... 3 1.1 Baseband circuit Debug guide... 3 1.1.1 Phone is Dead ... 3 1.1.2 SIM Card Detection Error ... 4 1.1.3 Audio Fail ... 5 1.1.3.1 Headset Fail ... 5 1.1.3.2 Speaker Fail... 6 1.1.3.3 Handset Microphone Fail... 7 1.1.3.4 Earphone Speaker Fail... 8 1.1.4 LCM Fail ... 8 1.1.5 Charger Fail ... 9 1.1.6 Vibrator Fail... 10 1.1.7 FM function Fail ... 10 1.2 Radio Frequency circuit troubleshooting ... 11 1.2.1 26MHz System clock fail ... 11 1.2.2 RF signal diagram in GSM900 Tx mode... 12 1.2.3 RF signal diagram in DCS1800 TX mode... 13 1.2.4 RF signal diagram in GSM900 Rx mode ... 14 1.2.5 RF signal diagram in DCS1800 RX mode... 15 2 1. Debug guide 1.1 Baseband circuit Debug guide 1.1.1 Phone is Dead The phone is dead NO Voltage at C620 =3.6V Contact problem Yes Voltage at C210=3.6V NO Defective IOTA (U202) or C215=1.5