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Nokia Lumia 1320 Service Manual

Nokia Lumia 1320
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RM-994/ RM-995/ RM-996
Camera Module Troubleshooting
NOKIA INTERNAL USE ONLY Page 105
Copyright © 2013 Nokia. All rights reserved.
 Introduction to camera module troubleshooting
Background, tools and terminology
Faults or complaints in camera operation can be roughly categorized into three subgroups:
1 Camera is not functional at all; no image can be taken.
2 Images can be taken but there is nothing recognizable in them.
3 Images can be taken and they are recognizable but for some reason the quality of images is seriously
degraded, or customer complains about image quality.
Image quality is very hard to measure quantitatively, and even comparative measurements are difficult
(comparing two images) to do, if the difference is small. Especially if the user is not satisfied with his/her
device's image quality, and tells, for example, that the images are not sharp, it is fairly difficult to
accurately test the device and get an exact figure which would tell whether the device is functioning
properly.
Often subjective evaluation has to be used for finding out if a certain property of the camera is acceptable
or not. Some training or experience of a correctly operating reference device may be needed in order to
detect what actually is wrong, or is there anything wrong at all.
It is easy for the user to take bad images in bad conditions. Therefore the camera operation has to be
checked always in constant conditions (lighting, temperature) or by using a second, known-to-be good
device as reference. Experience helps significantly in analyzing image quality.
Terms
Autofocus
Camera module contains lens movement mechanics for focus adjustment.
Autofocus enables camera to take sharp images of objects positioned
between 10cm to infinity. During AF the viewfinder image will be momentarily
blurred as the camera searches for the right focus setting.
Digital zoom
Digital zoom is done by first cropping the image by the zoom ratio and then
up scaling it to the output resolution. This will decrease the image quality
especially with high zoom ratios.
Dynamic range
Camera's ability to capture details in dark and bright areas of the scene
simultaneously.
Exposure time
Camera modules use silicon sensor to collect light and for forming an image.
The imaging process roughly corresponds to traditional film photography, in
which exposure time means the time during which the film is exposed to light
coming through optics. Increasing the time will allow for more light hitting the
film and thus results in brighter image. The operation principle is exactly the
same with silicon sensor, but the shutter functionality is handled
electronically.
Flicker
Phenomenon, which is caused by pulsating in scene lighting, typically
appearing as wide horizontal stripes in an image.
ND-filter
Neutral density filter is a filter which is used in very bright conditions to
reduce the amount of light hitting the sensor. The filter is built into the camera
module and applied automatically when needed.
Noise
Variation of response between pixels with same level of input illumination.
Resolution
Usually the amount of pixels in the camera sensor. In some occasions the
term resolution is used for describing the sharpness of the images.
Sensitivity
Camera module's sensitivity to light, in equivalent illumination conditions, a
less sensitive camera needs a longer exposure time to gather enough light in
forming a good image, Analogous to ISO speed in photographic film.

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Nokia Lumia 1320 Specifications

General IconGeneral
Pixel density245 ppi
Display diagonal6 \
Touch technologyMulti-touch
Display resolution1280 x 720 pixels
Native aspect ratio16:9
Display number of colors16.78 million colors
Processor cores2
Processor familyQualcomm Snapdragon
Processor frequency1.7 GHz
RAM capacity1 GB
Compatible memory cardsMicroSD (TransFlash)
Maximum memory card size64 GB
Internal storage capacity8 GB
Flash typeLED
White balanceAuto, Cloudy, Daylight, Fluorescent, Incandescent
ISO sensitivity100, 200, 400, 800, Auto
Front camera typeSingle camera
Maximum frame rate30 fps
Optical sensor size1/4 \
Video recording modes1080p
Resolution at capture speed1920x1080@30fps
Rear camera resolution (numeric)5 MP
Front camera resolution (numeric)0.3 MP
4G standardLTE
2G standardsGSM
3G standardsWCDMA
SIM card typeMicroSIM
Wi-Fi standards802.11b, 802.11g, Wi-Fi 4 (802.11n)
Bluetooth version4.0
3G bands supported850, 900, 2100 MHz
4G bands supported800, 1800, 2600 MHz
Bluetooth profilesA2DP, AVRCP, HFP, OPP, PBAP
SIM card capability-
Security algorithmsEAP-SIM, PEAP, WEP, WPA, WPA2
2G bands (primary SIM)850, 900, 1800, 1900 MHz
Mobile network generation4G
USB version2.0
USB connector typeMicro-USB, Micro-USB B
Headphone connectivity3.5 mm
Form factorBar
Product colorBlack
PlatformWindows
Operating system installedWindows Phone 8
Voice codecsAMR-NB, AMR-WB, EFR
Audio formats supportedAMR-NB, MP3, WMA
Video formats supported3G2, 3GP, AVI, M4V, MOV, MP4, WMV
Document formats supportedDOC, PDF, PPT, XLS
Multimedia Messaging Service (MMS)Multimedia Messaging Service (MMS) is a standard way to send messages that include multimedia content to and from a mobile phone over a cellular network
Talk time (2G)25 h
Talk time (3G)21 h
Battery capacity3400 mAh
Standby time (3G)- h
Browsing time (Wi-Fi)11.5 h
Continuous audio playback time98 h
Continuous video playback time9 h
Cables includedAC, DC
Weight and Dimensions IconWeight and Dimensions
Depth9.8 mm
Width85.9 mm
Height164.2 mm
Weight220 g

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