Samsung OFFICESERV 7100 Service Manual

Also see for OFFICESERV 7100: Quick guide System administration guide User guide User manual User guide

Contents

CHAPTER 13. Error! Use the Home tab to apply 제목 1,장 제목 1 to the text that you want to appear here.3-14 © SAMSUNG Electronics Co., Ltd.3.3.1.3 PLL Operation is AbnormalThe procedure for resolving the problem caused by Phase Locking Loop(PLL) operation isas follows:If PLL fails, a call can be connected but there is noise while calling.Is DUTY of FOI signal steady? NoYesIs REFERENCEclock selection MMC selected?NoYesIs the REFERENCEclock normal?NoYesIs 2 kHz norma? NoYesStartCheck if the corresponding channelsignal of highway TX is generated.Set the REFERENCE clock.Check the REFERENCE clock ofTEPRI board, main board andMP10/11 board.- If REFERENCE clock sometimesshakes, TEPRI line is abnormal.- If REFERENCE clock does notshake, repair the VCO circuit.MP10/11: Composed of U23, U24,and Y1.- MP10/11: Check PINT2 of U22.