Nokia 6110 Disassembly & Troubleshooting Instructions

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Nokia 6110 Disassembly & Troubleshooting Instructions Manual pdf 23 page image

PAMSTechnical DocumentationNSE–3Disassembly & Troubleshooting InstructionsPage 23Original, 11/97Receiver Fault (3)2nd IF13 MHzN620 pin 8(J542),SL: – 28 dBmN620 pin 44,SL: – 19 dBmN620 pin 47(J510),~2.8V Check VRX supply voltageN620 pin 53(J554),~1.2VCheck RXC control voltagefrom COBBA pin 18Change N620VHFLOZ620 input(J540),SL: –26 dBmCheck R626 and solderedjointsZ620 output(J538),SL: –28 dBmCheck soldered joints, if OKchange Z620N620 pin 34, SL: –36 dBmand pin 35, SL: –33 dBmN620 pin 34 and 35,DC–level, ~1.4VChangeN620Check R628 and R629 N620 pin 29 and 30,SL: – 29 dBmN250 pin 22 and 23,SL: –29 dBmN620 pin 29 and 30,DC–level ~1V Change N620Check soldered joints at N620and N250, if OK change N620Check connections betweenN620 and N250COBBAYESYESYESYESYESYESYESYESYESYESYESNONONO NONONONONONONONO