Acer B1-830, Service Manual

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[VoIP-headset] Headset Sending loudness should be 3dB~13dB and Headset Receiving loudness
shouldn't be over -13dB.
[VoIP-handheld hands-free] Handheld hands-free sending loudness should be 15dB at 30cm and
handheld hands-free receiving loudness should be 10dB at 30cm.
Headphone application must meet EN50332.
Single Digital Microphone.
ASR assist
Camera
Camera
Front camera : 0.3MP Camera with Fix Focus (GC0310) with ZSD mode
Photo capture at 30fps @ 640x480 in JPEG
Video recording at 30 fps@ 480p VGA in 3gp format
Rear camera : 5.0MP with Auto Focus (OV5670) with ZSD mode
(88 degree of wide angle view)
Photo capture at 30fps @ 2560x1920 in JPEG
Video recording at 30 fps@ 1080 p FHD in 3gp format
Button
POWER
Long press > 1 second (±10%) to power on (when device is off).
Long press 1 second to show power-off dialog (when device is on even in
lock state)
Once CPU is on, system Acer logo should show up within 2 seconds.
Press to suspend the device (when device is on)
Press to resume the device (when device is in suspend mode)
Once if the system resumes, system will be back to lock screen.
If system is in lock screen, without unlock by user, the system will
suspend after 10 seconds
Long press 5 seconds (±1%) to force power-off device (when device is on,
or in power-on procedure, or in lock state)
The method to lunch boot menu:
Hold volume up and press power key for 3 second
Release power key
Release volume up
Volume UP/Down
Volume up/down: Press to increase/decrease the volume
Press upper key to volume up in landscape mode, both of 0° orientation
and 180° orientation; The other to volume down.