LG MA840B Service Manual - Page 18

WARNING • FOR CONTINUED PROTECTION AGAINST EXCESSIVE RADIATION EMISSION, REPLACE ONLY WITH IDENTICAL REPLACEMENT PARTS TYPE NO.SZM-V 16-FA-63 OR VP-533A-OF FOR PRIMARY SWITCH TYPE NO SZM-V 1G-FA-G2 OR VP-532A-OF FOR MONITOR SW TCH TYPF NO S7M-V 16-FA-63 OR VP-533A-OF FOR SFCONDARY SWITCH Whcn the door release button is dcprcsscd slowly with the door c osed, an audib e click should be isconnect me wire lean rrom me secon ary switch heard at the same time or successively at intervals. When the button is released slowly, the (COM) and normally open (NO) terminals of the t h. The t should indicate a open circuit in audib e If the atches do not activate the switches when the door is closed, the switches should be a adjusted in accorc ance wit tle adjustment procedure. Disconnect the wire lead from the h pen h the meter should indicate an closed circuit Whcn the secondary switch operation is abnorma , make the necessary adjustment or replace the switch only witn e same type or switcn. primary switch. Connect the ohmmeter eads to the on-(COM)-and-Rormally-open (NO) C. MONITOR SWITCH TEST termina of the switch-The meter should indicate Disconnect the wire ead from the monitor switch. an open circuit in the door open condition. Connect the ohmmeter leads to the common -When-the-door-rs-close-dthe-meter--shoulti-(GO-M)-antl-hormal-ly-e-loseti-(N-G)-le-rm-rnals-o-f-the- indicate a closed circuit. switch. The meter should indicate closed circuit in When the primary switch operation is abnormal, the door open condition When the door is closed, make the necessary adjustment or replace the meter should in ica ean open circuit. When the. COMPONENTS SWITCHES (Wire leads removed) the samceartteypr ereopfas.iwr.initcghthe aoor or the interioc system, it is necessary to do this continuity fore operating th TEST PROCEDURE Check for continuity of the switch with an Ohm-meter RESULTS Door 0 Den Door closed Primary CO Switch Monitor Switch NC ( -1 CO COM Secondary rTh Switch NOTE . After checking for the continuity of switches, make sure that are connected correct y 5-7