User Guide

RH-53/54

Nokia Customer Care

4 COMPANY CONFIDENTIAL ISSUE 1 09/2004

General Instructions for GSM1800 RX Troubleshooting ................................ 48

RH-53/54 Transmitter Troubleshooting........................................................... 53

Measurement points for the transmitter ........................................................ 53

General instructions for TX troubleshooting ................................................... 54

Troubleshooting chart for GSM900 transmitter .............................................. 56

Logic signals for the Front End Module ......................................................... 57

Renesa FEM logic .......................................................................................... 57

RFMD FEM logic ............................................................................................ 58

Analog Power control signals (TXC, VPC, VDET) ......................................... 58

I/Q signals ...................................................................................................... 60

Alignment........................................................................................................... 61

Manual alignment with Phoenix ....................................................................... 61

RX calibration................................................................................................... 61

RX Band Filter Response ................................................................................ 64

Tx Power tuning............................................................................................... 64

I/Q tuning ......................................................................................................... 66

RF control ........................................................................................................ 69

Autotune (RH-53 with CMU200) ....................................................................... 70

File adjustments............................................................................................... 70

Phoenix setup .................................................................................................. 70

List of Figures

Page No

Fig 1 BB test points ............................................................................................... 7

Fig 2 BB test points 2............................................................................................ 8

Fig 3 Phone is dead troubleshooting..................................................................... 9

Fig 4 Flash programming troubleshooting............................................................. 10

Fig 5 Phone jammed troubleshooting ................................................................... 11

Fig 6 Troubleshooting when Contact Service message seen ............................... 12

Fig 7 No call troubleshooting................................................................................. 13

Fig 8 Phone is OFF:no current from charger ........................................................ 14

Fig 9 Display info:charger connected, not charging .............................................. 15

Fig 10 Microphone does not work ......................................................................... 16

Fig 11 Top: Earpiece does not work ..................................................................... 16

Fig 12 Headset does not work .............................................................................. 17

Fig 13 Vibra troubleshooting ................................................................................. 20

Fig 14 Receiver signal path................................................................................... 24

Fig 15 Transmitter signal path............................................................................... 25

Fig 16 Frequency plan .......................................................................................... 27

Fig 17 RF key component placement ................................................................... 28

Fig 18 Power supply configuration ........................................................................ 29

Fig 19 UEM measuring points.............................................................................. 30

Fig 20 Measured signal at VCXO output............................................................... 32

Fig 21 Troubleshooting chart for synthesizer ........................................................ 33