Nokia RH-53 Troubleshooting Instructions page 4

Nokia Customer Care
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
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
4 COMPANY CONFIDENTIAL
Copyright © 2004 Nokia. All Rights Reserved.
RH-53/54
Page No
ISSUE 1 09/2004