Nokia 1265 Guide

Nokia Customer Care
1265 (RH-103)
Mobile Terminal
RF Description and
Troubleshooting
Issue 1 04/2006 Company Confidential ©2007 Nokia Corporation

1265 (RH-103)
RF Description and Troubleshooting
Contents Page
Component Layout ................................................................................................... 3
Tx Troubleshooting................................................................................................... 5
Tx System Block Diagram .................................................................................5
Tx Introduction...................................................................................................6
Main Tx Component ..........................................................................................6
FTM Setup for Tx Troubleshooting ....................................................................7
Tx DC Test Points..............................................................................................8
Tx RF Test Points ..............................................................................................9
Tx DC Test Points............................................................................................10
Tx Path Troubleshooting ................................................................................. 11
Rx Troubleshooting ................................................................................................ 12
Rx System Block Diagram...............................................................................12
Rx Introduction ................................................................................................13
FTM Setup for Rx Troubleshooting..................................................................13
Cell Receiver Check from RF to DVGA...........................................................14
Receiver DC Test Points .................................................................................15
Receiver RF Test Points .................................................................................16
Rx Path Troubleshooting .................................................................................17
Page 2 ©2007 Nokia Corporation Company Confidential Issue 1 04/2007

1265 (RH-103)
Nokia Customer Care RF Description and Troubleshooting
Component Layout
Figure 1 and Figure 2 show the main components of the 1265 mobile terminal.
RF connector
Figure 1: Component layout (Top)
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1265 (RH-103)
RF Description and Troubleshooting
Page 4 ©2007 Nokia Corporation Company Confidential Issue 1 04/2007
Rx Saw filter
QSC6010 single chip
32.768KHz Crystal
19.2MHz XTAL
RF Antenna feed point
Front end module
(Duplexer/PA/Coupler)
Figure 2: Component layout (Bottom)

1265 (RH-103)
Nokia Customer Care RF Description and Troubleshooting
Tx Troubleshooting
Tx System Block Diagram
Front End Module
Figure 3: Tx system block diagram
Issue 1 04/2007 ©2007 Nokia Corporation Company Confidential Page 5

Troubleshooting
©2006 Nokia Corporation Company Confidential Issue 1 04/2007
Tx Introduction
The QSC6010 (Figure 3) provides the Zero-IF transmit signal path for Cellular-CDMA transmission. For this chipset, Cellular-CDMA refers
to band classes 0 and 3 as defined by the cdma2000 standard, with mobile station transmitters operating between 824 and 849 MHz. The
transmit signal path includes baseband amplifiers, quadrature upconversion, gain control RF amplification, and an output driver amplifier.
The driver amplifier output is routed to the final stages of the transmit chain – power amplifier, direction coupler, duplexer, and antenna.
Main Tx Component
Front End Module
(Duplexer/PA/Coupler)
Figure 4: Tx components
1265 (RH-103)
RF Description and
Page 6
QSC6010 Single chip

1265 (RH-103)
Nokia Customer Care RF Description and Troubleshooting
FTM Setup for Tx Troubleshooting
Put PWB on the module jig. Use the following steps to configure FTM for RF
troubleshooting.
1. Connect RF test connector to a spectrum.
2. Set to “FTM mode” in Module Jig.
3. Connect the mobile terminal to a PC via the Module Jig, and connect a
power supply.
4. Open CCS RF Tools software.
5. The FTM dialog box appears.
6. “Select COM port” to appropriate one
7. Set “Connect Phone”.
8. Set “Set FTM”.
9. Set “Set Band” to “CDMA800”.
10. Set “Set Channel “to Channel “384”.
11. Set “Set Pa Range R1” to “on”
12. Set “Set TX waveform” to “CDMA”
13. Set “Set TX on/off” to “on”.
14. Set “Set TX AGC” to “90”.
15. Select “ADC Channel” to Channel “4”.
16. Click “Get ADC” bottom to Power detector ADC value.
Figure 5: FTM dialog box
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1265 (RH-103)
RF Description and Troubleshooting
Tx DC Test Points
5
4
3
1
2
Figure 6: Tx DC test point
Table 1 shows the Tx DC test points shown in Figure 6.
Test Point Description Value
1 PA_ON 2.6V for PA turning on, 0V for turning off
2 PA_VMODE 0V for high gain mode 2.6V for low gain mode
3 VREG_MSMP 2.6V
4 VREG_RFTX 2.6V
5 HDET_CELL
Cell: _ 0.37 < 5 dBm _ 0.5 at 15 dBm _ 0.8 V at 25
dBm
Table 1: Tx DC Test Points
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1265 (RH-103)
Nokia Customer Care RF Description and Troubleshooting
4
Tx RF Test Points
1
2
3
Figure 7: Tx RF Test Points
Table 2 shows the test points shown in Figure 7.
Test Point Description Value
1 U6010 output 4dBm
2 PA input 2dBm
3 PA output 28dBm
4 RF connector 24dBm
Table 2: Tx RF Test Points
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1265 (RH-103)
RF Description and Troubleshooting
Tx DC Test Points
5
7
8
4
2
3
6
1
Figure 8: Bottom side Tx DC test points
Table 3 shows the Tx DC test points shown in Figure 8.
Test
Point Description Value RF Supply Lines Resistance to Ground
1 VREG_MSMP,c250 2.6V >320kΩto ground U6010
2 VPH_PWR,r214
3.2~4.2V >500kΩto ground U6010,U700
3 VREG_MSMC,c244
1.2V >9.6kΩto ground U6010
4 VREG_MSMA,c265
2.6V >23kΩto ground U6010
5 VEXT_DC,L208
3.2~5.7V ~9.2kΩto ground Q209
6 VREG_TCXO,L732
2.85V ~26kΩto ground U6010,U700
7 VREG_RFRX,c278
2.6V >320kΩto ground U6010
8 VREG_RFTX,c252
2.6V ~1.3kΩto ground U6010
Table 3: Tx DC Test Points and RF Supply Line Resistance to Ground
*Note: Always measure resistance measure resistance with the phone powered off
Page 10 ©2007 Nokia Corporation Company Confidential Issue 1 04/2007