Startup Failure; Startup Failure Due To High Current - Huawei MediaPad 7 Lite S7-931w Maintenance Manual

External interfaces
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9.2 Startup Failure

MediaPad 7 Lite can be normally started only when the following conditions are met:
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9.2.1 Startup Failure Due to High Current

Adjust the voltage of the DC regulated power supply to 5 V/3 A. Use the DC regulated power
supply to power the LITE_USB interface. The current exceeds 500 mA after MediaPad 7 Lite
is powered on. This usually occurs when the IC patch is abnormal or damaged.
2012-10-08
MediaPad 7 Lite Maintenance Manual
Interface Type Physical
Connection
Mode
USB Micro-usb
WCDMA Main antenna
WLAN Built-in antenna
Power key Dome key
Key Volume
adjustment key
Touchscreen I2C interface
LCD RGB
MHL interface Micro-USB
Pog PIN
Pedestal
interface
Press the power key for 2 seconds when the battery is installed.
The battery is installed, the USB interface is connected to the 5 V DC regulated power
supply, and MediaPad 7 Lite is started and enters the USB charge mode.
The battery is installed, the pedestal interface is connected to the 5 V DC regulated
power supply, and MediaPad 7 Lite is started and enters the charge mode.
Huawei Confidential
Number of Description
Interfaces
1 It meets the USB 2.0
specification and is used to
connect related devices such
as the PC.
The input is the 5 V/2 A DC
power interface.
1 It is used to transmit uplink
voice data (WCDMA).
2 It is used to connect local
WLAN devices.
1 It is used to power on or off
MediaPad 7 Lite.
2 VOL+ and VOL-
1 Capacitively compatible
1 1024 x 600 pixels
HD television interface and
1
USB interface reuse
The pedestal is used for
1
serial port communication
and charge.
INTERNAL
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