Sn Cell Rx Bb Filter; Sn Cell Rx Dc Offset I (Or Q); Sn Amps Rx Bb Filter; Sn Amps Rx Dc Offset I (Or Q) - Nokia NPD-1 Series Troubleshooting - Rf

NPD-1
Troubleshooting — RF
hot very quickly.
Troubleshooting: If the phone was recently transmitting in Cell band at full power for an
extended period of time, it is probably hot for that reason. Let it cool down for a few
minutes, then try again. If it still fails, there may either be a short on the board or else a
problem with the PA Temp circuitry. To check PA Temp circuitry, check R808, C232,
R202, and D200. If a short is suspected, check the cell PA first. If an infrared camera is
available, this is one of the easiest methods to detect a short.

SN Cell RX BB Filter

This is one of the phone's self tunings, which tunes the lowpass filter in the Batman IC
N701, in cell CDMA mode.
This self tuning returns one of the filters tuned parameters, which should be within the
limits.
Manual Verification: Use RF Tuning window in Phoenix, set mode to "self tune" and
choose this tuning.
Troubleshooting: Check Batman (N701) and supporting components.

SN Cell RX DC Offset I (or Q)

This is one of the phone's self tunings, which measures and adjusts the cell band CDMA
receiver DC offsets until they are within the limits.
The DC offset is returned for I (or Q).
Manual Verification: Use RF Tuning window in Phoenix, set mode to "self tune" and
choose this tuning.
Troubleshooting: Check Batman (N701) and supporting components.

SN AMPS RX BB Filter

This is one of the phone's self tunings, which tunes the lowpass filter in the Batman IC
(N701) in AMPS mode.
This self tuning returns one of the filters tuned parameters, which should be within the
limits.
Manual Verification: Use RF Tuning window in Phoenix, set mode to "self tune" and
choose this tuning.
Troubleshooting: Check Batman (N701) and supporting components.

SN AMPS RX DC Offset I (or Q)

This is one of the phone's self tunings which measures and adjusts the cell band AMPS
receiver DC offsets until they are within the limits.
Page 12
Nokia Corporation
CCS Technical Documentation
Confidential Issue 1 11/2002