1. M88 Schematic training materials

2. M88 System block diagram

3. Power up sequence
When insert adapter or battery ====>PPDCIN_G3H(16.5V)
U7800===>PP3V42_G3H(3.42V)
U7950===>PPBUS_G3H(S5--S3)
Press power button===>U4900 (SMC_ONOFF_L)
U7900===> PPBUS_G3H(S0)
U4900===>U2300 (PM_PWRBTN_L)
U2300===>U4900 (SUS_CLK_SB)
U2300===> Q7000,Q7010 (PM_S4_STATE_L)
U2300===> Q7020,Q7030 (PM_S3_STATE_L)
U7880===>U4900(ALL_SYS_PWRGD)

4. U4900===>U7100 (IMVP_VR_ON)
U7100===>U2300(VR_PWRGD_CLKEN_L)
U7100===>U2300
(VR_PWRGOOD_DELAY)
U2300===>U1400 (PLT_RST_L) 11. U1400===>U1000 (FSB_CPURST_L)
System boot, read BOOTROM, check HW, IO, etc

5. Power block diagram

7. Sensor location

8. Penryn 2.6G, 2.5G CPU 64bit, 6MB L2 cache,800MB FSB

9. SB and NB
M88 SB and NB is same as M76. The basic function is the same.
NB: DDRII memory, internal Graphic controller (CRT,DVI,S-VIDEO);
SB: IO device, include HDD,ODD,FW,ENET,AUDIO,BT, IR, CAMERA...

10. GPU NVIDIA
M88 GPU uses NVIDIA chip.PCI- E signals of between NB and nVIDIA chip are the same as M76 which is PCI-E x 16 (differential pairs) topology.

11. Frame buffer interface

12. LCD Backlight
M76:CCFL Backlight

13. M88:M88 uses LED backlight.
Delete U9560 Controller.Sihnal PWM is from GPU.

14. 1. 8V Frame Buffer Regulator M88 uses U9300 to provide 1
1.8V Frame Buffer Regulator M88 uses U9300 to provide 1.8V for 8pcs Frame Buffer.this is different from M76 that use U7500 regulates 1.8V for both DDR2 and 4 pcsBuffer Regulator

15. M88 LIO Schematic

16. M88 LIO schematic is same as M76.
The difference between M88 and M76 about M88 is only LIO FPC.
In LIO,audio controller U6200 is important chip. If any issue such as Mic test fail,speaker test fail about audio ,you can double check the function.