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 RH-10 Series Troubleshooting Manual

CCS Technical Documentation
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 before proceeding. If it still fails, there may be either a short on the board or 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 avail-
able, 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
set limits.
Manual Verification: Use "RF Tuning" dialog box 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 set limits.
The DC offset is returned for I (or Q).
Manual Verification: Use "RF Tuning" dialog box 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
set limits.
Manual Verification: Use the "RF Tuning" dialog box 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 CDMA
receiver DC offsets until they are within the set limits.
Issue 1 09/2002
Nokia Corporation
Confidential
RH-10
Troubleshooting
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