Samsung STH-N275 Service Manual
Also see for STH-N275: User guide
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Contents
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SAMSUNG Proprietary-Contents may change without notice1-9Trouble ShootingNReplace U304Case TDMA mode:setup basestation for RX testAmplitude:-50dBm3U304_9, 19, 11, 12measure I/QQuarature wave NNeed to check U304 &Quad LC Tank circuit(L310, C328, C330,C329, R320)PON_LD=HCase AMPS mode:setup basestation for RX testAudio Freq gen : 1004HzFM deviation : 2.9kHz4Y YYU304_16 DEMOD(sinusoidal wave)Vp-p=24mVFreq=1004HzNNeed to check U304 &R327, R323, C353, C107U101_52 DEMOD(sinusoidal wave)MAX Vp-p=1.4VFreq=1004HzNReplace U203YU101_40 BBCLK=6.2208MHz or 4.96NHz or5.12MHzNReplace U203YU101_32RX_CLK=BBCLK/2 orBBCLK/8NReplace U203YU101_31 RX_SYNC=BBCLK/32 orBBCLK/128NReplace U203YU101_31 RX_DATA=serial dataDONE |
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