NOKIA nokia 447ziplus monitor sm free download

File name nokia__447ziplus_monitor_sm.pdf

8. TROUBLESHOOTING FLOW CHART (1) Power Start NG Power start NG Is the No voltage at C815 normal (125-340V) ? Is Yes F801 Replace Yes open ? F801 Does Yes No R808 open? Check power socket copper and plug & D811...D814, R805 No Check Q868,I862,D831,R867 Is the No start-up voltage at C831(16V) ? Check R849, R848, D870, C831, D831, R831,Q850 Yes Is the voltage of Yes R867 normal (>1Vpp)? No Check secondary side circuit. D802~D807 or any short circuit on B+ output,R867 resistance Q820,Q821,Q822, Q823 and their input control logic www.rtv-horvat-dj.hr 27 (2) No Video (raster appear) No Video(raster appear) Are the No waveforms at pin 2,6,11 of I901 Normal ? Check signal cable, C901, C931, C961 Yes Are the voltages at pin No 15 of I901 normal ? Check ABL line from PCB Yes Are the