Incorrect Tx Vhf Frequency - Nokia 2255 Manual

Rm-97, rf description and troubleshooting
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Incorrect Tx VHF Frequency

Following are possible causes for incorrect Tx VHF frequencies:
• Power supplies to PLL portion of IC N7000 missing or low (VR5)
• Loop filter or resonator components missing or incorrectly installed
• 19.2MHz reference clock missing or low
• Programming is incorrect
• Component failure (N7000 IC)
ISSUE 1 10/2005
©2005 Nokia Corporation
RF Description and Troubleshooting
Company Confidential
2255 (RM-97)
Page 47

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