Nokia NHL-4 7210 Service Manual page 152

NHL-4/4U
Troubleshooting Instructions
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200mV/div
1
VPCTRL _900 power level high at R703/C703
VPCTRL_1800/1900 power level high at R704/C704
500mV/div 100us/div
VANT_1 / GSM900 TX at C804
VANT_2 / GSM1800 TX at R808
VANT_3 / GSM1900 TX at C805 OV
( no signal/ Flatline on Oscilloscope screen)
500mV/div 100us/div
VTXB_900 at C713
VTXB_1800_1900 at C714
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100us/div
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200mV/div 100us/div
TX I/Q at R516/517 power level high Random data
1
500mV/div
VANT_1,VANT_2,VANT_3
500mV/div MTB 100us/div
7;3 DW -
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100us/div
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