Samsung SGH-S400i Service Manual

Also see for SGH-S400I: User guide User guide

Contents

Samsung SGH-S400i Service Manual Manual pdf 22 page image

SAMSUNG Proprietary-Contents may change without noticeSGH-S400i Flow Chart of Troubleshooting2-19This Document can not be used without Samsung's authorization2-1-7. Speaker PartSpeaker does not workIs speaker working ? NoCheck U314Pin #1 ≒ 13MHz ?Check U314Pin #32 ≒ 1.8Pin #15 >= 3.3V ?Replace the speakerCheck the OSC101Check the U311ENDNoNoYesYesPin #4 of U314 = High ? Check the UCD307NoAre there any signal at theR300 and R307 ?Resolder or changeR301, R303, R306, C301, C304Setting spk_sel : HighNoYesYesYesAre there any signal at thepin #4,5 of SLC101? Check the U304NoYesAre there any signal at thepin #56, 57 of SLC103 ? Change the FPCBNoYesPin #4 of U126 = Low ? Check the UCP201NoYesAre there any signal at thepin #5,8 of PAM127 ? Check the C131, C133, R104, R105NoYesAre there any signal at thepin #2, 10 of U110 ? Check the U110 and relatedpartsNoYes