Samsung SC-140 Service Manual

Also see for SC-140: User guide User guide

Contents

9No tray open/closeFPC is normally inserted in CN702? Retest after inserting FPC in CN702 properlyStartNCheck SW701 pattern and solderingFPC : Flexible Printed CircuitReplace SW701After FPC short check, no error, check SW soldering of deckFPC of CN702 is normally inserted?Retest after inserting FPC in CN502 normallyAfter FPC short check, no error, check SW soldering of deckFPC of CN702 is normally inserted?Retest after inserting FPC in CN702 normallyNN NIC301 48pin is 0V at pressing SW701?YIC301 29pin is 0V with tray in? CN502 16pinbecomes 0V?CN502 14pinbecomes 0V?N NNNIC301 28pin is 0V with tray open?Check R502,R503,R508, R509 soldering.CheckIC301,33pin, 34pin soldering.Check R502,R503,R508 soldering.CheckIC301,33pin, 34pin soldering.Replace IC501Replace IC501YYYYIC501 11pin change from 1.75V to +0V at pressing SW701?NN NNNIC301 33pin changes from 1.75V to 5V at pressing SW701?IC501 13pin changes from +2.4V to +0.7V, and 15pinfrom +2.4V to +3.9V, at pressing SW701?IC501 14pin chages from 2.4V to 3.9Vand 15pin from 2.4V to 0.7V at pressing SW701?Output Voltage of IC501 13Pin is impressed intoLOADING (-) and IC501 14Pin(+)?Check pattern and solderingbetween CN702 and IC501Replace loading Motor.YY YYYY15OPEN tary repair CLOSE operation repairSCR-140(A4)-en 99.3.15 8:39 AM ˘ ` 9