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1、2010-11-6第第21212121课课 笔记本接口电路检修三笔记本接口电路检修三主要内容：主要内容：硬盘与光驱接口、声卡、硬盘与光驱接口、声卡、 VGAVGAVGAVGA接口检修接口检修教学目的：教学目的：使每个学员掌握各功能电使每个学员掌握各功能电 路故障的检修路故障的检修2010-11-6IDE接口电路维修一, 硬盘接口电路维修:笔记本硬盘接口与台式机一致,只是在台式机的基础上附加 了4针脚,分别为供电和地线.具体引脚定义请见教材附图:维修思路:认不到硬盘 COMS设置不正确,可载入默认状态.5V供电不正常,追查41,42脚线路测量各引脚的对地值,如有异常沿着线路检查.接口1REST信
2、号有无高电平主板上的硬盘接口或转接口不良,可更换测试(SONY,富 士通的接口线坏的最多 )排除了以上问题则为南桥坏.(一般南桥坏的不多)认乱码,无法分区或分区不能保存多数为3-18,23-39之间的线路开路或是阻值变大,通常为 南桥信号输出与HDD接口之间的排阻坏或是PCB板断线.硬盘加了密码之后在有些机型上能认到也会出现找不到 分区表或无法分区2010-11-6光驱接口电路检修光驱接口电路检修: : : :供电5V.(看能不能出盒就可判断有无供电)各信号引脚的对地值接口坏或虚焊南桥虚焊或坏IDE端口冲突 :用原来的光驱可以识别,但换其他任何 型号的光驱都无法识别.一般只有换了光驱后才出现这
3、种 情况.只有找到与原型号完全一致的光驱再把原来的电路 板换上就可解决.另有少许品牌的光驱有主从跳线,拔动跳 线使光驱为从SLAVE状态也可以.或者从同类型的机器拆 下来的直接就可以识别到.这种现象在东芝,联想,华硕上比 较常见,另部分老款的IBM也有此现象.通病: IBM R32,R40 经常认不到光驱为南桥虚焊.2010-11-6声卡电路维修大多数笔记本都为AC97声卡.芯片型号一般为ADI, ALC, VIA, CS,SIGMATEL等功放芯片: TPA 0202 TPA2020A, TPA0312,BA7786, BH7884, AN12942等HD Audio HD Audio是 高
4、保真音频，是Intel与杜比 (Dolby)公司合力推出的新一代音频规范。目前主要是 Intel 915/925系列芯片组的ICH6系列南桥芯片所采 用。 专业名词解释专业名词解释AC 97通常称为音频解码器，是英特尔公司用于将个人电脑音 效提升，降低噪音的规格，由于音频解码器在1997年制订，因此 称为AC 97。AC 97的原理是将数字电路(Digital)和模拟电路(Analog)分成 两个集成电路:Integrated Circuit (IC),如此可以将输出品质提 高,减少系统的成本.模拟电路 数字电路A C A C 9 7 9 72010-11-63 53 6供电 5 vR S T
5、232010-11-61263458.11 Audio Failure 8.11 Audio Failure 8.11 Audio Failure 8.11 Audio Failure Audio IN Audio IN Audio IN Audio INNo sound from speaker after audio driver is installed.No sound from speaker after audio driver is installed.No sound from speaker after audio driver is installed.No sound f
6、rom speaker after audio driver is installed.3536AOUT_LAOUT_LAOUT_LAOUT_LAOUT_RAOUT_RAOUT_RAOUT_RTo next pageU9U9U9U9I/OI/OI/OI/O ControllerControllerControllerController HubHubHubHub82801DBM82801DBM82801DBM82801DBM ICH4-MICH4-MICH4-MICH4-MU523U523U523U523Audio CodecAudio CodecAudio CodecAudio CodecC
7、MI9738SCMI9738SCMI9738SCMI9738SU521U521U521U521P P P PCMCIACMCIACMCIACMCIAControllerControllerControllerControllerSBSPKRSBSPKRSBSPKRSBSPKRR748 10KCARDSPK#CARDSPK#CARDSPK#CARDSPK#12PC_BEEPACSYNCACSYNCACSYNCACSYNCACSDOUTACSDOUTACSDOUTACSDOUTACSDIN0ACSDIN0ACSDIN0ACSDIN0ACRST#ACRST#ACRST#ACRST#ACBITCLKA
8、CBITCLKACBITCLKACBITCLK118105P14P206R755 2KP11R756R7572222C790 0.33C783 0.332018CDROM_RIGHTCDROM_RIGHTCDROM_RIGHTCDROM_RIGHTCDROM_LEFTCDROM_LEFTCDROM_LEFTCDROM_LEFTJ504J504J504J504CDROM Connector21P14 R773 6.8KR781 6.8KR770 6.8KR780 6.8KC759 0.1SPK_OFFSPK_OFFSPK_OFFSPK_OFFTo next pageL23L535120Z/100
9、M120Z/100MAGNDAGNDAGNDAGNDPC_BEEPPC_BEEPPC_BEEPPC_BEEPH8_AVREFH8_AVREFH8_AVREFH8_AVREFR776 4.7KC778 2.2R771 4.7KC791 121MICMICMICMICC775 100PExternal MICJ10J10J10J10C777 4.7MIC1MIC1MIC1MIC1AGNDAGNDAGNDAGNDCAGNDR769 0+5V+5V+5V+5V54R736 47K123C748 0.1L541 120Z/100MC789 0.1AGNDC799 0.1AGNDC797 10AGNDJS
10、50325,38AVDD1,2AVDDADAVDDADAVDDADAVDDAD+5V+5V+5V+5VC796 0.1L533 0L536120Z/100ML538120Z/100M19C788 0.33CDROM_COMMCDROM_COMMCDROM_COMMCDROM_COMM3L537 600Z/100ML544 600Z/100MR778 6.8KR777 6.8KR790 0R787 0R789 0R6900P12R822 0SPRKOUT_551SPRKOUT_551SPRKOUT_551SPRKOUT_551ABGNDVCCYU522U522U522U522 NC7S32NC7
11、S32NC7S32NC7S32P14GNDGNDGNDGNDAGNDAGNDAGNDAGNDAGNDAGNDAGNDAGNDAGNDAGNDAGNDAGND+3V+3V+3V+3VGNDGNDGNDGNDDVDD1,21,9C763 0.1C760 0.12010-11-68.11 Audio Failure 8.11 Audio Failure 8.11 Audio Failure 8.11 Audio Failure Audio OUT Audio OUT Audio OUT Audio OUTNo sound from speaker after audio driver is inst
12、alled.No sound from speaker after audio driver is installed.No sound from speaker after audio driver is installed.No sound from speaker after audio driver is installed.C771 100U15U15U15U15AmplifierAmplifierAmplifierAmplifierAPA2020AAPA2020AAPA2020AAPA2020AL534 120Z/100M+5V+5V+5V+5VC185 0.1C194 0.17,
13、18LVDD/RVDDP15AGNDR1LINE OUT2215ROUT+ROUT+ROUT+ROUT+ROUT-ROUT-ROUT-ROUT-J3J3J3J3 12L1 600Z/100ML2 600Z/100ML1 600Z/100MR R R R310LOUT+LOUT+LOUT+LOUT+LOUT-LOUT-LOUT-LOUT-J1J1J1J112L2 600Z/100ML L L L Internal Speaker ConnectorAMP_SHUTDOWNAMP_SHUTDOWNAMP_SHUTDOWNAMP_SHUTDOWNSPK_OFFSPK_OFFSPK_OFFSPK_OF
14、FROUT+ROUT+ROUT+ROUT+4644J4J4J4J4 J4J4J4J42826Transfer BoardTransfer BoardTransfer BoardTransfer BoardP25C188 4.7C183 0.1R188 10KR185 10KR186 33KR187 15KAOUT_RAOUT_RAOUT_RAOUT_R2120RLINE INRHP INC190 4.7RHP_INRHP_INRHP_INRHP_INRLINE_INRLINE_INRLINE_INRLINE_INC191 4.7R201 10KR199 10KR192 33KR200 15KA
15、OUT_LAOUT_LAOUT_LAOUT_L45LLINE INLHP INC192 4.7LLINE_INLLINE_INLLINE_INLLINE_INLHP_INLHP_INLHP_INLHP_INC195 0.1From previous pageFrom previous pageFrom previous pageCAGNDLOUT+LOUT+LOUT+LOUT+L542 600Z/100M11MUTE INR774 1KC787 100PR767 1KC776 100PC774 100R768 22C769 100R775 22L540 600Z/100ML539 600Z/100M126345SE/BTL#HP/LINE#1416LINE_IN#LINE_IN#LINE_IN#LINE_IN#C186 0.1C782 0.1R772 100KR766 100K+5V+5V+5V+5VR747 100K+5V+5V+5V+5V+3V+3V+3V+3VR509 0R510 0L545 0CAGNDAGNDAGNDJ9J9J9J9P4+VA+VA+VA+VAAGNDAGNDL563 120Z/100M2010-11-6音频解码器音频解码器A C A C9 7 9 7耳机与扬声器是通
