Содержание
- 2. Function Block
- 3. M/B Top Placement #1 MT6582 MCP Charge IC Audio Jack Receiver SKY77593 MT6166 FLASH LED IC
- 4. M/B Bottom Placement #2 MT6323 DUAL SIM CONNECTOR BACK UP BATTERY Mic 2 TF CARD CONNECTOR
- 5. BB Common Question BB-1 Can not power on (無法開機) BB-2 Can not download (無法更新軟件) BB-3 Can
- 6. BB-1 Can not power on (無法開機) (1/4) 1. 確認電池是否有電? VBATT (TP09 > 3.6V) 2. 確認J802吃錫狀況是否正常? 3.
- 7. 5. 請確認MT6323周圍電壓是否正常? VPROC_PMU在 C134 (0.9V~1.1V) VSYS_PMU在 R373 (1.8V) BB-1 Can not power on (無法開機) (2/4) VSYS_PMU
- 8. BB-1 Can not power on (無法開機) (3/4) Debug Flowchart
- 9. BB-1 Can not power on (無法開機) (4/4) VCORE≈0.7V~1.3V VPORC≈0.7V~1.3V VIO18=1.8V VIO28=2.8V VM12_INT=1.2V VA1=2.5V VA2=2.5V VUSB=3.3V VTCXO=2.8V
- 10. BB-2 Can not download (無法更新軟件) (1/3) 1. 確認開機後電流起跳正常。(記憶體中無代碼時,電池電流約在0.1A左右) 2. 開機過程中如果電流過大或過小,會造成USB port無法識別。 3. 檢查SB 的R3312是否空焊 提供CPU内部USB驱动电路供电电源,电压为3.3V左右
- 11. BB-2 Can not download (無法更新軟件) (2/3) 4. 若可以正常DL,但無法進入META mode,檢查RF transceiver 26MHz及RF chip是否正常。 Sysclk由Y1301通过RF transceive output reference
- 12. BB-2 Can not download (無法更新軟件) (3/3) 5. 確認com port是否正確 1:DL时在无code情况下show MTK USB Port 2:DL完img后,在BB/RF META tool开启下应show
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