1、,第九课 -冯小仪主要内容：1、讲解IBMT40主板的待机触发电路图；2、讲解时钟电路的工作原理及维修思路；3、讲解PG、RST信号的产生过程及维修思路；主要目的：1、掌握IBMT40主板的待机触发电路图；2、掌握时钟电路的工作原理维修思路；3、掌握PG、RST信号的产生过程及维修思路；,冯工谈维修,冯工谈维修,-PWRSWITCH,U28,VCC5M,VCC3M ON,MPWRG?,-PM_SLP_S5,-PM_SLP_S3,YES,NO,VCC2R5A,U61,VCC3A,VCCCPUIO,VCC2.5V,VCC2R5A_ON,U30,U29,VCC1R25B,U61,VCC3B,VCC1
2、R8B,VCC5B,Q70,VCC1R2B,B_ON,VCCCPUCORE,VCORE_ON,VTT_PWRG,VCCVIDEOCORE,PANEL_POWER_ON,VCC3P,U61,Q45,Q22,VBL16,VBL_DRV,-CLK_ENABLE,U19,VCC1R5B,U30,Q31,VCC1R5B_DRV,U51,Video_ON,U47,U61,Q88,Q12,VCC3_V,VCC1.8_V,VIDEO_DRV,Q42,VCC1.5_V,PMH4,Power shutdown Thermal shutdown,Q99,U23,U5,冯工谈维修,ICH4,H8S,TSURUMAI,
3、DC/DC PWM,CPU,MCH,PMH4,-MAINOFF,AD3205,CLKGenerator,VCC5M,VCC3M,MPWRG,BPWRG,-PWRSW_H8,DC/DC Switch,VR_PWRGD,-CLK_ENABLE,VCORE_ON,-CPURST,-PCIRST,CPUPWRG,-PM_SLP_S3,VCC3M VCC5M VCC1R8M VCC1R5M VCC3AUX VCC1R5AUX VCC1R2M,VCCCPUCORE,VCC3A VCC3B VCC5B VCC1R8B VCC1R5B VCC2.5_V VCC1.5_V VCC1.8_V VCC3_V,-IC
4、H_SLP_S4,-ICH_SLP_S3,-PWRSWITCH,DC INT 16V,1,5,4,7,3,2,VCC2R5A VCCCPUIO VCC1R25B VCC1R2B VCCVIDEOCORE,3,7,6,VCC3P VBL16,9,13,12,VTT_PWRG,8,A_ON ,B_ON,Boot up,-PM_SLP_S5,9,9,7,10,10,10,11,13,14,CPUCLK_CLK 100M -CPUCLK_CLK_100M,冯工谈维修,VCC3M, Battery,VCC3M VCC5M,VCC3M VCC1R5M,VCC3B VCC1R5B VCC1R8B VCCCP
5、UIO,VCC3AUX VCC1R5AUX,VCC3B VCC5B,-PCIRST,ICH4,PWROK - BPWRG VGATE - VR_PWRGD,RSMRST - MPWRG,power on,冯工谈维修,U19,VGATE/VRMPWRG,PWROK,VCC3M VCC5M VCC1R5M VCC3AUX VCC1R5AUX VCC3B VCC5B VCC1R8B VCCCPUIO VCC1R5B,O.K,VR_PWRGD,CPUPWRG,CPU,ICH4,BPWRG,U61,-CPURST,MCH,-PCIRST,CPURST ACTIVE,冯工谈维修,冯工谈维修,PWRSW_H
6、8 U23 pin19,-PM_SLP_S3# U28 pin71 ( output Suspend to RAM) -PM_SLP_S4# ( Suspend to disk) -PM_SLP_S5# U28 pin72 ( system Soft off),A2_ON_PMH4 U28 pin63,VCC2R5A_ON,VCC2R5A L10 pin1output for DDR DIMMby MAX 1845,B_ON_PMH4 U28 pin70,B_ON D1 pin1,CPUIO_ON U29 pin11,1R25B POWER L15 pin2(output for RAM by
7、 MAX1845),VCCCPUIO L11 pin2 (output for CPU by MAX1845) VTT_PWRG R474 pin2 ( output for CPU power control by CPU I/O ok,VCORE_ON_PMH4,VCORE-ON U19 pin18,VCCCPUCORE L2 pin2 (output for CPU by ADP3205),Output for KBC,VCC3B VCC5B VCCIR5B APWRG BPWRG ( output for ICH4),PMH4 power control,TSURUMA,MAX1845
8、,MAX1845,ADP3205,MAX 1845,Video_on-pmh4,MAX1845,VCCVIDEOCORE L9 For ATI power,POWER-SWITCH,冯工谈维修,IBM POST CODE,START,C8,C9,24,04, 06,CPU, GMCH, ICH3, FWH,CPU, GMCH,ICH3,18,From S4,ICH3 SMBUS,08,DF,C1,11,0A,17, 28, 3A,2A, 2C,2E,GMCH, SDRAM,0A, 3A,2A, 2F,Shadowed To Ram, 38,E0,ICH3, PCI,Check Wrap-Plu
9、g,20,ICH3,SuperIO,29,33,09,2B,C1,3B,09,0A, CE, 3A,0B, D1,0F,14,ICH3, H8,1A, 1C,22, C8,32,67,9C, 6B, 34,3C, 3D,42, 45, 47, 49, C6,WOL,GMCH, ICH3,CPU, GMCH, ICH3,GMCH, VGA,ICH3, PMH2,C5,48, 4A, 4C,24,59, CC,55, 22, 52, 54, 76, 58,3F,C4, 7C,IBM LOGO,C6, C9,5B, 5C, 60, 62,64,66, 68, 6A, 6C, 6E,7C, *C6, 7E,*C1, 88, 8A, 81, 87, 85, 82, 84, 86, 83, CE,8C, CB, CD, 90, 8B, 95, 92,B6, (IBM security check),BA, 98, BE,96, AE, 9E,93,10, C7, 9E, A0, 7A, CE, A4, C2,BA, C3,A8,AA,AC,E3,AE, B0, B2, B4, B5,C5,Initial, crypt,EEPROM,Boot,Beep,Components Mostly involved,Bios Setup,
