21
Step 3: enter engineering instruction #### 8787 #### 7878 # # and turn off the phone Log.
Step 4: redisconnect the phone, power, re-open the tool, and then connect the phone.
The fifth step, if it cannot resolve. Please restart your computer and then connect your phone to open the tool
to try.
(2) Upgrade mode switch failure
Make ensure that before upgrading T card is not inserted, the investigation is as follows:
Step 1: Open the Device Manager to see whether the port to see if a drive is not installed.
Step 2: Check the battery, if the battery is low, the switch no device
（
the driver has not been WHQL certified
，
need to manually update drivers
）
Step 3 USB cable may be connected to the front USB port on the computer, hanging dead after switching
USB ports. Please plugged into the rear USB port.
(3) Manually update drivers
Automatically after the installation is complete driver, if the driver has not been certified WHQL, following
dialog box will pop up:
Summary of Contents for ACER Z320
Page 1: ...1 Z320 SERVICE GUIDE ...
Page 10: ...5 Phone Tour Six View ...
Page 14: ...9 Bottom View Figure 1 4 Bottom View Item Description 1 USB Port 1 ...
Page 15: ...10 Left View Figure 1 5 Left View ...
Page 27: ...22 Click Next Automatic install ...
Page 29: ...24 4 2 User interface of WriteStation ...
Page 30: ...25 ...
Page 31: ...26 4 3 Set parameters ...
Page 32: ...27 Password 20120405 ...
Page 42: ...37 5 3 Operation complete ...
Page 45: ...40 Write IMEI BT WIFI successfully ...
Page 66: ...61 ...
Page 69: ...64 12 Combine and compress the battery cover with the handset ...
Page 88: ...83 Test result interface as below ...
