User Guide

Nokia Customer Care RF Description and Troubleshooting

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

The level of 19.2MHz is also important because the D2800 is very sensitive and

can pick up a weak 19.2MHz clock. This can result in intermittent problems, such

as constant phone reset.

• The synthesizers for 6235/6235i/6236i are:

Incorrect PLL Frequencies

Following are some possible causes for incorrect PLL frequencies:

• Power supplies to PLL portion

• Control line to VCO

• Loop filter or resonator components missing or incorrectly installed

• 19.2MHz reference clock missing or low

• Component failure (PLL IC, N7100, N7000, VCO, or VCTCXO)

Table 8: Synthesizers for 6235/6235i/6236i

Synthesizer Band Channel PLL

Dual Band UHF Cell and AMPS 1009.62 MHz at CH384 separate LMX2310 PLL IC

PCS 2088.10 MHz at CH600

Rx VHF Cell, AMPS and PCS 256.2 MHz inside N7100 IC

Tx UHF Cell and AMPS 3298.16~3395.88 MHz inside N7000 IC

PCS 3700.00~3819.90 MHz