Rx Vhf - Nokia RH-57 Series Troubleshooting Manual

2112 (RH-57)
Troubleshooting - RF
Figure 30: (Top) PWB. (Bottom left) A zoomed view of the Jedi LO/PLL input match components on the UHF
synthesizer layout (Bottom right) A zoomed view of the Jedi LO/PLL input match components UHF synthesizer

Rx VHF

Following are possible causes for an incorrect Rx VHF frequency:
• Power supplies to the PLL portion of Yoda IC (N700) are missing or low (VR7)
• Loop filter or resonator components are missing or incorrectly installed
• 19.2MHz reference clock is missing or low (C510)
• Programming is incorrect
Note: See the Schematics chapter for an Rx VHF schematic.
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layout with part numbers.
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Company Confidential Issue 1 07/2004