Rx Vhf Layout; Incorrect Rx Vhf Frequency - Nokia RM-11 Series Troubleshooting Manual

RM-11
Troubleshooting - RF

Rx VHF Layout

R F probing point:
256.2MHz @ -2.5 dBm
N701 IC with
integrated PLL

Incorrect Rx VHF Frequency

Possible causes:
• Power supplies to PLL portion of N701 IC missing or low (VR7)
• Loop filter or resonator components missing or incorrectly installed
• 19.2MHz reference clock missing or low (C512)
• Programming is incorrect
• Component failure (PLL IC)
© 2005 Nokia Corporation
Page 38
CC Technical Documentation
Lock voltage probing point
DC voltage between 1 and 2 V
Confidential
C DMA IF
filter
Issue 2 09/2005