Nokia RH-66 Operating instructions

Nokia Customer Care
2115i/2116/2116i (RH-66)
Mobile Terminals
Issue 1 03/2005 Company Confidential ©2005 Nokia Corporation
RF Description and
Troubleshooting

2115i/2116/2116i (RH-66)
RF Description and Troubleshooting
Page 2 ©2005 Nokia Corporation Company Confidential Issue 1 03/2005
Contents Page
Component Layouts ....................................................................................................................................... 3
Phoenix Setup.................................................................................................................................................. 5
Tx Troubleshooting......................................................................................................................................... 7
Main Tx Components ..................................................................................................................................7
Cell Transmitter Block Diagram ...............................................................................................................8
Tx DC Test Points .........................................................................................................................................9
Tx RF Test Points ........................................................................................................................................11
TX DC Test Points .......................................................................................................................................13
Receiver Troubleshooting .......................................................................................................................... 15
Rx System Block Diagram .......................................................................................................................15
Cell Receiver Check from RF to IQ ........................................................................................................16
PCS Receiver Check from RF to IQ .......................................................................................................17
AMPS Receiver Check from RF to IQ ...................................................................................................19
Receiver DC Test Points ...........................................................................................................................21
Receiver RF Test Points ............................................................................................................................22
Receiver IF Test Points .............................................................................................................................25
Receiver Logic Input Voltages............................................................................................................ 27
Synthesizer Troubleshooting .................................................................................................................... 28
Incorrect PLL Frequencies .......................................................................................................................28
Synthesizer Block Diagram .....................................................................................................................29
19.2 MHZ VCTCXO Reference Clock .....................................................................................................30
Measuring the AFC Voltage................................................................................................................ 30
VCTCXO Manual Tuning....................................................................................................................... 31
VCTCXO Test Points ...................................................................................................................................35
Receiver UHF Synthesizer ........................................................................................................................36
Rx VHF LO ....................................................................................................................................................39
Rx VHF LO (N7100) Schematic .......................................................................................................... 40
Tx UHF LO ....................................................................................................................................................41
TX UHF LO Schematic ........................................................................................................................... 42
GPS RF Troubleshooting ..........................................................................................................................44
GPS RF General Testing ............................................................................................................................45
Self-test Failure...................................................................................................................................... 46
Oscillator Failure.................................................................................................................................... 46
CW Test Failure....................................................................................................................................... 46
GPS RF Test Points ....................................................................................................................................48

Nokia Customer Care RF Description and Troubleshooting
2115i/2116/2116i (RH-66)
Issue 1 03/2005 ©2005 Nokia Corporation Company Confidential Page 3
Component Layouts
Figure 1 and Figure 2 show the main components of the 2115i/2116/2116i.
Figure 1: Component layout (top)
Cell RF connector

2115i/2116/2116i (RH-66)
RF Description and Troubleshooting
Page 4 ©2005 Nokia Corporation Company Confidential Issue 1 03/2005
Figure 2: Component layout (bottom)
Diplexer
VCO
Cell duplexer
N7100 Rx
downconverter
GPS LNA
PCS Rx SAW
GPS RF connector
GPS TCXO
PCS duplexer
Cell Rx SAW filter
Cell PA
CDMA IF
SAW filter
VCTCXO
PCS PA
AMPS IF
XTal filter
Cell Tx filter
GPS RF filter (1)
Synthesizer IC
PCS Tx filter
N7160 Rx
front-end IC
Tx upconverter GPS RF filter (2)

Nokia Customer Care RF Description and Troubleshooting
2115i/2116/2116i (RH-66)
Issue 1 03/2005 ©2005 Nokia Corporation Company Confidential Page 5
Phoenix Setup
Use the following steps to configure Phoenix for RF troubleshooting.
1. Connect RF test connector to a call box.
2. Connect the mobile terminal to a PC via the bottom connector, and connect a
power supply.
3. Open the Troubleshooting menu, and click Phone Control.
The Phone Control dialog box appears.
4. On the Phone Control dialog box, click the LOCAL button in the Phone State
area to put the mobile terminal into Local Mode.
Figure 3: Phone Control dialog box
5. Use Table 1, “Phoenix Configuration,” on page 6 to continue Phoenix
configuration based on the band type.

2115i/2116/2116i (RH-66)
RF Description and Troubleshooting Nokia Customer Care
Page 6 ©2005 Nokia Corporation Company Confidential Issue 1 03/2005
Table 1: Phoenix Configuration
Cell PCS AMPS
1. On the RF Main Mode dialog box:
• Band = Cell (CDMA)
• Channel = 384
• Mode = Rx/Tx
2. Click Set. Be sure that the “RF Main Mode set successfully”
message appears in the status bar.
3. On the CDMA Control dialog box:
• State = Rho ON
• Band = Cell
• Radio Configuration = Mode 1: IS-95 Voice
• Select the Set default PDM values check box.
4. Click Execute.
5. Configure the spectrum analyzer using the following values:
• Center frequency = 836.52 MHz
• Span = 100 MHz
• Amplitude = 20 dBm
• Attenuation = Auto
• BW = Auto
6. Open the RF PDM Control dialog box, and click Read Phone.
Ensure the following values:
• Tx AGC1 = 0
• Tx AGC2 = -512
• PA Gain = 114
• Pout = +16 dBm
• Current = 360 mA
• Pout with AAS-10 at antenna connection = -8 dBm
1. On the RF Main Mode dialog box:
• Band = PCS (CDMA)
• Channel = 600
• Mode = Rx/Tx
2. Click Set. Be sure that the “RF Main Mode set successfully”
message appears in the status bar.
3. On the CDMA Control dialog box:
• State = Rho ON
• Band = PCS
• Radio Configuration = Mode 1: IS-95 Voice
• Select the Set default PDM values check box.
4. Click Execute.
5. Configure the spectrum analyzer using the following values:
• Center frequency = 1880 MHz
• Span = 100 MHz
• Amplitude = 20 dBm
• Attenuation = Auto
• BW = Auto
6. Open the RF PDM Control dialog box, and click Read Phone.
Ensure the following values:
• Tx AGC1 = 0
• Tx AGC2 = -512
• PA Gain = 207
• Pout = +8 dBm
• Current = 300 mA
• Pout with AAS-10 at antenna connection = -8 dBm
1. On the AMPS Control dialog box:
• Click the Tx Control tab.
• In the Set Channel field, type 384.
• In the Power Level field, type 2.
• Select the Transmitter ON option
2. Click Execute.
3. Configure the spectrum analyzer using the following values:
• Center Frequency = 836.52 MHz
• Span = 100 MHz
• Amplitude = 20 dBm
• Attenuation = Auto
• BW = Auto
4. Open the RF PDM Control dialog box, and click Read Phone.
Ensure the following values:
• Tx AGC1 = 0
• Tx AGC2 = -512
• PA Gain = -200
• Pout = +17 dBm
• Current = 370 mA
• Pout w/ AAS-10 at antenna connection = -8 dBm

2115i/2116/2116i (RH-66)
Nokia Customer Care RF Description and Troubleshooting
Issue 1 03/2005 ©2005 Nokia Corporation Company Confidential Page 7
Tx Troubleshooting
Main Tx Components
Figure 4: Tx components
PCS TX SAW filter PCS PA
PCS
duplexer
PCS
coupler
Cell duplexer Cell coupler
Power
detector
Cell PACell TX SAW filter
N7000 TX IC

2115i/2116/2116i (RH-66)
RF Description and Troubleshooting Nokia Customer Care
Page 8 ©2005 Nokia Corporation Company Confidential Issue 1 03/2005
Cell Transmitter Block Diagram
Figure 5: Tx system block diagram

2115i/2116/2116i (RH-66)
Nokia Customer Care RF Description and Troubleshooting
Issue 1 03/2005 ©2005 Nokia Corporation Company Confidential Page 9
Tx DC Test Points
Figure 6: Tx DC test points
4
5
2
1
6
VBATT PCS 7 8
3
VBATT Cell

2115i/2116/2116i (RH-66)
RF Description and Troubleshooting
Page 10 ©2005 Nokia Corporation Company Confidential Issue 1 03/2005
Table 2 shows the Tx DC test points shown in Figure 6.
Table 2: Tx DC Test Points
Test Point Description Value
1 AGC 1 From 0.1 to 1.8 V
2 AGC 2 From 0.1 to 1.8 V
3 VR6 2.8 V
4 Tx UHF LO lock voltage 1.2 V
5VR1B 4.8V
6 Tx IQ in 1.2 V
With oscilloscope: 500 mV p-p
7 VR2 (power detector) 2.76 V
8 Power detector output PCS:
• 1.9 V at < 5 dBm
• 1.6 V at 15 dBm
• 0.8 V at 25 dBm
Cell:
• 1.9 V at < 5 dBm
• 1.7 V at 15 dBm
• 1.3 V at 25 dBm

2115i/2116/2116i (RH-66)
Nokia Customer Care RF Description and Troubleshooting
Issue 1 03/2005 ©2005 Nokia Corporation Company Confidential Page 11
Tx RF Test Points
Figure 7: Tx RF Test Points
12
4
3
5
6
8
7
9
10
11
12

2115i/2116/2116i (RH-66)
RF Description and Troubleshooting
Page 12 ©2005 Nokia Corporation Company Confidential Issue 1 03/2005
Table 3 shows the test points shown in Figure 7.
Table 3: Tx RF Test Points
Test Point Description Value
1 Tx IQ in with oscilloscope 500 mV p-p with +1.2 V offset
2 Tx UHF LO Cell: 3346.08 MHz, -57 dBm
PCS: 3760 MHz, -54 dBm
3 Cell/AMPS N7000 out Cell: 836.25 MHz, -15 dBm
AMPS: 836.25 MHz, dBm
4 PCS N7000 out 1880 MHz, -22 dBm
5PCSPAin -23dBm
6 Cell/AMPS PA in Cell: -15 dBm
AMPS: -7 dBm
7 Cell/AMPS PA out Cell: +11 dBm
AMPS: +22 dBm
8 PCS PA out -2 dBm
9 Power detector in Cell: -8 dBm
AMPS: +3 dBm
PCS: -17 dBm
10 PCS coupler out -1 dBm
11 Cell/AMPS coupler out Cell: +8 dBm
AMPS: +18 dBm
12 Diplexer out Cell: +10 dBm
AMPS: +19 dBm
PCS: -17 dBm

Nokia Customer Care RF Description and Troubleshooting
2115i/2116/2116i (RH-66)
Issue 1 03/2005 ©2005 Nokia Corporation Company Confidential Page 13
TX DC Test Points
Figure 8: Bottom side Tx DC test points
Table 4 shows the Tx DC test points shown in Figure 8.
Table 4: Tx DC Test Points and RF Supply Line Resistance to Ground
Test
Point Description Value RF Supply Lines Resistance to Ground*
1 VIO 1.8 V >1MΩto ground N7100, N7000, UHF PLL
2 VR3 2.78 V (synthesizer) >500kΩto ground VCTCXO
3 VR7 2.78 V (Rx) ~500kΩto ground N7100
4 VR5 2.78 V (Rx) 3.2~5.1Ωto ground N7160, N7100
5 VR4 2.78 V (Rx) 4.3kΩto ground VCO
6 VR6 2.78 V (Tx) 300kΩto ground N7000
7 VR2 2.78 V (Tx) 7.5kΩto ground N7000, PA detector
8 VR1B 4.75 V (Tx) >100kΩto ground N7000
4
6
1
10
9
7
2
3
5
8

2115i/2116/2116i (RH-66)
RF Description and Troubleshooting
Page 14 ©2005 Nokia Corporation Company Confidential Issue 1 03/2005
* Note: Always measure resistance with the phone powered off.
9 VR1A 4.75 V (synthesizer) >100kΩto ground UHF PLL
10 VBATT From 3.2 to 4.7 V
VREFRF1 45kΩto ground N7100
Table 4: Tx DC Test Points and RF Supply Line Resistance to Ground (Continued)
Test
Point Description Value RF Supply Lines Resistance to Ground*

2115i/2116/2116i (RH-66)
Nokia Customer Care RF Description and Troubleshooting
Issue 1 03/2005 ©2005 Nokia Corporation Company Confidential Page 15
Receiver Troubleshooting
Rx System Block Diagram
Figure 9: Rx RF system diagram

2115i/2116/2116i (RH-66)
RF Description and Troubleshooting
Page 16 ©2005 Nokia Corporation Company Confidential Issue 1 03/2005
Cell Receiver Check from RF to IQ
Use the following values to check the CDMA Cell Rx functionality from RF to IQ output.
1. Start Phoenix in Local Mode with only the Rx path turned on.
2. Inject a –75 dBm CW signal of 881.82 MHz (i.e. 300 kHz offset from 881.52 MHz
or 10 channels away).
3. Measure a 300 kHz tuning on the analyzer. You should see a typical -21 dBm IQ
tuning for CDMA Cell.
Figure 10: Receiver IQ level on CDMA Cell band
Figure 11 shows the Cell spectrum with an inject tone at -75 dBm, as well as the IQ
output test points. Note that DC is present on the IQ output test points. All test points
should be approximately equal.
dBm
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
Cell I Q Output
Trace A
Centre: 300 kHz Span: 200 kHzAtten: 10 dB
Res BW: 3 kHz Vid BW: 3 kHz Sweep: 100 ms
5/5/2004 3:29:30 PM HP8595ECellIQ.spt
1
1Trace A
302 kHz
-21.2500 dB
m

Nokia Customer Care RF Description and Troubleshooting
2115i/2116/2116i (RH-66)
Issue 1 03/2005 ©2005 Nokia Corporation Company Confidential Page 17
Figure 11: Cell spectrum (left) and IQ output test points (right)
PCS Receiver Check from RF to IQ
Use the following values to check the PCS receiver functionality from RF to IQ output.
1. Start Phoenix in Local Mode with only the Rx path turned on.
2. Inject a –75 dBm CW signal of 1960.5 MHz (i.e. 500 kHz offset from 1960 MHz
or 10 channels away).
3. Measure a 500 kHz tuning on the analyzer. You should see a typical -22 dBm IQ
tone for PCS. If the 300 kHz tone works but the 500 kHz tone does not, it is PCS
possible that the baseband filter was not set by Phoenix.
RX_IP
RX_QP
RX_IN
RX_QN

2115i/2116/2116i (RH-66)
RF Description and Troubleshooting
Page 18 ©2005 Nokia Corporation Company Confidential Issue 1 03/2005
Figure 12: Receiver IQ Level on PCS Band
Figure 13 shows the PCS spectrum with an inject tone at -75 dBm, as well as the IQ
output test points. Note that DC is present on the IQ output test points, and all test
points should be approximately equal.
Figure 13: PCS spectrum (left) and IQ output test points (right)
dBm
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
PCS I Q Output
Trace A
Centre: 500 kHz Span: 200 kHzAtten: 10 dB
Res BW: 3 kHz Vid BW: 3 kHz Sweep: 100 ms
5/5/2004 3:37:55 PM HP8595EPcsIQ.spt
2
2Trace A
503 kHz
-22.4500 dB
m
RX_IP
RX_QP
RX_IN
RX_QN

Nokia Customer Care RF Description and Troubleshooting
2115i/2116/2116i (RH-66)
Issue 1 03/2005 ©2005 Nokia Corporation Company Confidential Page 19
AMPS Receiver Check from RF to IQ
Use the following steps to check the AMPS receiver functionality from RF to IQ output.
1. Start Phoenix in Local Mode with only the Rx path turned on.
2. Inject a –75 dBm CW signal of 881.53 MHz (i.e., 10 kHz offset from 881.52 MHz)
into the RF.
3. Measure a 10 kHz tone on the analyzer. You should see a typical -20 dBm IQ tone
for AMPS.
Figure 14: Receiver IQ Level on AMPS band
Figure 15 shows the AMPS spectrum with an inject tone at -75 dBm, as well as the IQ
output test points. Note that DC is present on the IQ output test points, and all test
points should be approximately equal.

2115i/2116/2116i (RH-66)
RF Description and Troubleshooting
Page 20 ©2005 Nokia Corporation Company Confidential Issue 1 03/2005
Figure 15: AMPS spectrum (left) and IQ output test points (right)
RX_IP
RX_QP
RX_IN
RX_QN