Receiver Rf Troubleshooting - Nokia 6235 Troubleshooting Manual
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Also See for 6235:
- User manual (233 pages) ,
- Baseband description and troubleshooting (48 pages) ,
- Disassembly/assembly (12 pages)
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6235/6235i/6236i (RM-60)
RF Description and Troubleshooting
Receiver RF Troubleshooting
The heart of the receiver is the N7160 Rx IC, which contains two LNAs and mixers. The
other components are passive. There are two RF SAW filters for the Cell and PCS bands.
In addition, there are two additional IF filters, an IF SAW for CDMA and an IF Crystal for
AMPS. The back-end of the receiver consists of the N7100 IC, which handles the VGA and
IQ demodulator functions.
Page 28
Figure 23: Cell Tx UHF LO Sprectum Output
©2005 Nokia Corporation
Key Observation
30 kHz offset —65dBC
Company Confidential
Issue 1 04/2005
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Troubleshooting
