Autofocus (Af) Failure - Nokia RM-529 Service Manual

RM-529; RM-530; RM-584
Camera Module Troubleshooting
• Electrical interface problem. Secondary camera connection or camera module is broken. Check the
components around the secondary camera.
3 ST_LED_FLASH_IF_TEST
• This tests the interface to the flash driver without the need of flash LED. If the test fails, check the driver
and components around it.
4 ST_LED_FLASH_TEST
• Note that when using camera application dim red flash is seen during still imaging even when the flash
is manually turned off. This is called an indicator and its normal behavior – do not change the
components.
• This test flashes both red indicator and white flash LED. If the flash is not visible, check the flash PWB
connection. Change the flash PWB if needed.

Autofocus (AF) failure

Steps
1. Use the camera application and focus the viewfinder image to a close distance by putting your finger on
top of the optical joystick. Another way to do the focusing, depending on the SW settings, is to press the
joystick button and hold it down until the focus is done.
• Focus is done when the green or red color is shown. Usually auto mode does not get green result when
the target is closer than 30-50 cm. To be able to focus to targets as close as 10 cm, please select close-
up mode from the side menu.
• Lens movement should be seen from the viewfinder when the camera is doing AF. If it is seen, the
camera is ok.
2. If the lens is not moving check fuse F1400 by measuring its resistance. The resistance should be close to
zero. Voltage measurement is not reliable since a broken fuse is not always totally open loop, but there
might be resistance of few kilo ohms.
3. If the fuse is broken, change the camera module and the fuse.
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