General Visual Inspection Guidelines - Nokia RM-235 Service Manual

RM-235
FMTx 2.0 troubleshooting
The device then internally adjusts its dividers in order to maintain the required output frequency. Using this
method it is possible to reduce the effective ppm of the reference clock down to +/- 14ppm over the full
operating temperature range of -15 to +50 degrees Centigrade.

General visual inspection guidelines

• If the handset has the FMTx antenna in the back cover then check the condition of the cover, the antenna
trace and any mechanical interfaces for the antenna e.g. pogo pins.
• Check that the Si4713 device is placed correctly on the PWB and that there are no obvious signs of damage.
• Check the surrounding components and ensure correct placemen on the PWB and that there is no visual
damage. Check that there are no missing components.
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