Nokia 7088 Troubleshooting Manual
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Also See for 7088:
- User manual (94 pages) ,
- Troubleshooting manual (44 pages) ,
- Disassembly/assembly (9 pages)
Related Manuals for Nokia 7088
Summary of Contents for Nokia 7088
- Page 1 Nokia Customer Care 7088 (RM-219) Mobile Terminal RF Description and Troubleshooting Issue 1 12/2006 Company Confidential © 2006 Nokia Corporation...
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Page 2: Table Of Contents
Rx introduction ....................12 Main RX component..................12 FTM setup for RX troubleshooting..............13 Cell Receiver Check from RF to IQ ..............14 Receiver DC Test Points..................16 Receiver RF Test Points ..................17 Rx path troubleshooting...................18 Page 2 © 2006 Nokia Corporation Company Confidential Issue 1 11/2006... -
Page 3: Component Layout
Nokia Customer Care RF Description and Troubleshooting Component Layout Figure 1 show the main components of the 7088mobile terminal. Figure 1: Component layout-Top Side Figure 2: Component layout-Bottom Side Issue 1 11/2006 © 2006 Nokia Corporation Company Confidential Page 3... -
Page 4: Tx Troubleshooting
7088 (RM-219) RF Description and Troubleshooting Tx Troubleshooting Tx system block diagram Figure 3: Tx system block diagram Page 4 © 2006 Nokia Corporation Company Confidential Issue 1 11/2006... -
Page 5: Tx Introduction
RF amplification, and an output driver amplifier. The driver amplifier output is routed to the final stages of the transmit chain – power amplifier, isolator, duplexer, and antenna. Main TX component Issue 1 11/2006 © 2006 Nokia Corporation Company Confidential Page 5... -
Page 6: Ftm Setup For Tx Troubleshooting
10. Set “Set Pa Range R1” to “on”. 11. Set “Set TX waveform” to “CDMA”. 12. Set “Set TX on/off” to “on”. 13. Set “Set TX AGC” to “100”. Figure 4: FTM dialog box Page 6 © 2006 Nokia Corporation Company Confidential Issue 1 11/2006... -
Page 7: Tx Dc Test Points
0.84 V With oscilloscope: 500 mV p-p DAC_REF 1.82V VREG_MSMP 2.96V VREG_RFTX 2.65V Table 1 shows the Tx DC Test Points shown in Figure 5. Table 1: Tx DC Test Points Issue 1 11/2006 © 2006 Nokia Corporation Company Confidential Page 7... -
Page 8: Tx Rf Test Points
Table 2 shows the test points shown in Figure 6. Test Point Description Value RFT6122 output 3dBm PA input 1dBm PA output 27dBm RF connector 24.5dBm UHF LO 0dBm at 1763.04MHz Table 2: Tx RF Test Points Page 8 © 2006 Nokia Corporation Company Confidential Issue 1 11/2006... -
Page 9: Tx Dc Test Points
>350kΩ to ground U632,U631,U629 VREG_RFTX,C856 2.64V >450kΩ to ground U632,U631,U629 Table 3: Tx DC Test Points and RF Supply Line Resistance to Ground *Note: Always measure resistance with the phone powered off Issue 1 11/2006 © 2006 Nokia Corporation Company Confidential Page 9... -
Page 10: Tx Path Troubleshooting
Memory IC is underfilled and cannot be replaced. • The Baseband Shield Cover Assy and RF Shielding Cover cannot be reused after removal. • After using the heatgun, domesheet is recommended to be replaced. Page 10 © 2006 Nokia Corporation Company Confidential Issue 1 11/2006... -
Page 11: Rx Troubleshooting
7088 (RM-219) Nokia Customer Care RF Description and Troubleshooting Rx Troubleshooting Rx system block diagram Figure 8: Rx DC troubleshooting test points Issue 1 11/2006 Company Confidential © 2006 Nokia Corporation Page 11... -
Page 12: Rx Introduction
Qualcomm’s Mobile Station MSM6025 devices that also provide status and control signaling. Integrated RX LO circuits, ideally supplemented by the RFT6122 transmitter IC, provide frequency plan flexibility and further reduce PCB parts count. Main RX component Page 12 © 2006 Nokia Corporation Company Confidential Issue 1 11/2006... -
Page 13: Ftm Setup For Rx Troubleshooting
Set “Connect Phone”. Set “Set FTM “. Set “RF Mode” to “CDMA800”. Set “Set Channel “to Channel “384”. Set “Set LNA Range” to whatever needed. Figure 9: FTM dialog box Issue 1 11/2006 © 2006 Nokia Corporation Company Confidential Page 13... -
Page 14: Cell Receiver Check From Rf To Iq
Measure a 300 kHz tuning on the analyzer. You should see a typical -48 dBm IQ tuning for CDMA Cell. Figure 10: Receiver IQ level on CDMA Cell band Page 14 © 2006 Nokia Corporation Company Confidential Issue 1 11/2006... - Page 15 Note that DC is present on the IQ output test points. All test points should be approximately equal. Figure 11: Cell spectrum (left) and IQ output test points (right) Issue 1 11/2006 © 2006 Nokia Corporation Company Confidential Page 15...
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Page 16: Receiver Dc Test Points
Table 4 includes the descriptions and values for Rx DC troubleshooting test points shown in Figure 12. Test Point Description Value VREG_MSMP,R800 2.96V VREG_RFRX,R7563 2.58V LNA BIAS,L800 2.58V Table 4: Rx DC Test Points Page 16 © 2006 Nokia Corporation Company Confidential Issue 1 11/2006... -
Page 17: Receiver Rf Test Points
Table 5 includes the descriptions and values for Rx RF troubleshooting test points shown in Figure 13. Test Point Description Value LNA IN -27dBm RX SAW INPUT -47dBm RX SAW OUTPUT -50dBm Table 5: Rx RF Test Points Issue 1 11/2006 © 2006 Nokia Corporation Company Confidential Page 17... -
Page 18: Rx Path Troubleshooting
Memory IC is underfilled and cannot be replaced. • The Baseband Shielding Cover Assy and RF Shielding Cover cannot be reused after removal. • After using the heatgun, the domesheet is recommended to be replaced. Page 18 © 2006 Nokia Corporation Company Confidential Issue 1 11/2006...