User Guide

Nokia Customer Care RF Description and Troubleshooting

6235/6235i/6236i (RM-60)

Receiver Logic Input Voltages

Figure 40 shows the receiver logic input voltages.

Figure 40: Receiver logic input voltage test points

Table 5 includes the measure logic levels for the N7160.

If the logic levels are significantly off (+/- 0.2V), replace the N7160 and re-measure. If

the voltages are still out of specifications, refer to the Baseband Troubleshooting chapter.

N7160 Receiver Overview

Keep the following points in mind regarding the N7160 receiver:

• There is a separate LNA for 800MHz (Cell and AMPS) and 1900MHz (PCS).

• There is a separate RFA (inside N7160) for 800MHz (Cell and AMPS) and

Table 5: Rx Front-end (N7160) Logic Levels

Mode

Logic Input Voltages

IF_SEL BAND GAIN_CTL

AMPS High Gain 2.8 V 0.1 V 2.8 V

AMPS Low Gain 2.8 V 0.1 V 0 V

Cell CDMA High Gain 0 V 0.1 V 2.8 V

Cell CDMA Low Gain 0 V 0.1 V 0 V

PCS CDMA High Gain 0 V 2.7 V 2.8 V

PCS CDMA Low Gain 0 V 2.7 V 0 V

N7160