Huawei U9500, Руководство по обслуживанию

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U9500 Maintenance Guide 9 Troubleshooting
Issue 1.2 (2012-6-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
46
Common power configuration for U901 is as follows:
VIO_1V8 = 1.8 V, VDD_VMEM = 1.2 V, VDD_2V1 = 2.1 V, VDD_1V2 = 1.2 V,
VDD_VCXIO = 1.8 V, VDD_CORE1 = 0.93 V, VDD_CORE2 = 0.93 V, VDAC_1V8 = 1.8 V,
VAXU1_2V85 = 2.85 V, VDD_CORE3 = 1.2 V, VAUX2_2V8 = 2.8 V, VAUX3_2V8 = 2.8 V,
VDD_MMC1 = 2.8 V, VDD_VSIM = 1.8/3.0 V, VPP_1V8 = 1.8 V, VDD_RTC = 1.8 V, and
USB_3V3 = 3.3 V
Where, the VDD_CORE3, VAUX2_2V8, VAUX3_2V8, VDD_MMC1, VDD_VSIM,
VPP_1V8, and USB_3V3 must meet the application mechanism, that is, the power supply
corresponding to an application must be enabled or disabled according to the state of the
application.
If the fault persists after you perform the preceding process, run the tool
OmapFlash_mDDRtest provided by TI to check whether the DDR2 functions properly.
Ensure that the PC can identify the port to which the phone is connected through a USB cable.
OmapFlash_mDDRtest is availabel for download at the website:
https://sps01.itg.ti.com/sites/OMAP_PBU/System_Engineering/HWRP/HWREF/t
ools/OMAPFlash/Software/Forms/AllItems.aspx?RootFolder=%2fsites%2fOMA
P_PBU%2fSystem_Engineering%2fHWRP%2fHWREF%2ftools%2fOMAPFlash
%2fSoftware%2fOfficial%20Builds&FolderCTID=&View={58145661-3285-493
4-B1E0-14D122A54E89}
To use OmapFlash_mDDRtest, perform the following steps:
Step 1
After the tool is installed, enter CMD in the start interface to open the editor.
Step 2
Set the directory to which the tool is installed, such as, cd "C:\Program Files\Texas
Instruments\OMAPFlash>"
Step 3
Enter OMAPFlash.exe -v -2 -omap 4 -p SEVM_MDDR_ELPIDA_8G -t 600 command
mtquick 80000000 9FFFFFFC to check whether DDR2 channel 1 is normal.
Step 4
Enter OMAPFlash.exe -v -2 -omap 4 -p SEVM_MDDR_ELPIDA_8G -t 600 command
mtquick A0000000 BFFFFFFC to check whether DDR2 channel 2 is normal.
---End
If the DDR2 is normal, the interface displays No Problem Found . Otherwise, it displays
Operation Failed . For details about how to use OmapFlash_mDDRtest, see the following
compressed file.
OmapFlash_mDDRtest.rar
If the DDR2 is faulty, resolder or replace the DDR2. If the DDR2 is in good condition,
resolder or replace the AP (U301).
9.2.4 No Current
Cause
No current is usually caused by power supply channel absence, poor soldering, or power-key
circuit faults.