Ericsson ServTeleph free download

File name ServTeleph.pdf

SERVICE: Telephone Ericsson Handheld Telephone 1341-B SERVICE: Telephone 2 SERVICE: Telephone Contents Connectors and Signals ______________________________ 4 Connector J1 ____________________________________________ 4 Disassembly __________________________________________ 6 Reassembly______________________________________________ 7 Changing the Circuit Board _________________________________ 7 Fault Finding and Alignment __________________________ 8 Sequence of Adjustments ____________________________ 9 3 SERVICE: Telephone Connectors and Signals The location of the logic board connectors and a description of the respective signal names will follow below. Connector J1 1 ATMS 2 PWSRC 3 LSPCTRL 4 AGND 5 AFMS 6 SWDC5 7 ICTRL 8 DGND 9 VPPFLASH 10 HOOK 11 DTMS 12 DFMS 13 ONSRQ 14 DCIN SM1341EN/CONJ1.GEM Table 1: Connector J1 Pin Signal In/Out Function 1 ATMS In Audio To Mobile Station Sensitivity: 50 mV, referred to +/-2.3 kHz dev. Input imp. 10 k/ nF 2 PWRSRC In Power source Indicates external power supply Log. "1": External power supply Log. "0": Battery 3 LSPCTRL Out Loudspeaker control Handsfree loudspeaker control Log. "1": Speaker ON Log. "0": Speaker OFF