Nokia RM-20 Manuals

Manuals and User Guides for Nokia RM-20. We have 3 Nokia RM-20 manuals available for free PDF download: Troubleshooting - Rf, Disassembly/Assembly, Troubleshooting - Antenna

Nokia RM-20 Troubleshooting - Rf

Nokia RM-20 Troubleshooting - Rf (68 pages)

Transceivers

Brand: Nokia | Category: Cell Phone | Size: 1.83 MB

Table of Contents

Table of Contents
2
RF Troubleshooting
5
Phone Components
6
General Troubleshooting
8
Transmitter Parts
9
- Cell Transmitter Block Diagram
  10
Transmitter Schematics
11
Transmitter Troubleshooting Setup
13
- AMPS TX Setup
  13
- Cell TX Setup
  14
- PCS TX Setup
  16
Transmitter Troubleshooting
17
- Failed Test: TX PA Detector
  18
- TX DC Probe Points
  19
- TX RF Probe Points
  21
Receiver Troubleshooting
22
- Receiver Schematics
  24
- RF AGC Status
  26
- Turning on the RX Path
  27
- Switching the RX Gain States
  29
- Cell Receiver Check from RF to IQ
  29
- PCS Receiver Check from RF to IQ
  31
- AMPS Receiver Check from RF to IQ
  32
- Receiver Diagnostic Signal Tracing
  34
- Receiver if RF
  34
- Receiver if
  35
- Receiver DC
  37
- Receiver Logic Input Voltages
  38
Alfred (N750) Receiver Troubleshooting
39
- Alfred DC Troubleshooting
  39
Synthesizer Troubleshooting
40
- Incorrect PLL Frequencies
  40
- Synthesizer Block Diagram
  41
- Synthesizer Schematic
  43
19.2 MHZ VCTCXO Reference Clock
44
- Measuring the AFC Voltage
  45
- VCTCXO Manual Tuning
  46
VCTCXO and UHF Synthesizer Probe Points
49
UHF Synthesizer Troubleshooting
50
Rx Vhf lo
54
- RX VHF lo (Batman) Schematic
  55
Tx Uhf lo
56
- TX UHF lo Schematic
  57
- UHF PCS TX lo Spectrum
  59
- UHF Cell TX lo Spectrum
  60
GPS RF Troubleshooting
61
- GPS Schematic
  62
GPS RF General Testing
63
- Self Test Failure
  64
- Oscillator Failure
  64
- CW Test Failure
  64
GPS RF Probing
66

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Nokia RM-20 Disassembly/Assembly

Nokia RM-20 Disassembly/Assembly (18 pages)

Transceivers

Brand: Nokia | Category: Cell Phone | Size: 2.05 MB

Table of Contents

Table of Contents
2
Safety Information
3
- ESD Protection
  3
Disassembly Instructions
4
Assembly Instructions
11
- Assemble the Whip Antenna
  11
- Assemble the Microphone
  11
- Assemble the DC Jack
  12
- Assemble the Vibra Motor
  12
- Assemble the PIFA Antenna
  12
- Assemble the Headset Jack
  13
- Assemble the Power Button
  13
- Assemble the PWB
  14
- Assemble the LCD Display
  15
- Secure the Screws
  15
- Assemble the Type Label
  16
- Assemble the A-Cover
  17
- Assemble the B-Cover
  17

Nokia RM-20 Troubleshooting - Antenna

Nokia RM-20 Troubleshooting - Antenna (16 pages)

Transceivers

Brand: Nokia | Category: Cell Phone | Size: 0.34 MB

Table of Contents

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