Nokia 6088 Rf Description And Troubleshooting
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Also See for 6088:
- User manual (97 pages) ,
- Baseband description and troubleshooting (42 pages) ,
- Schematic (25 pages)
Related Manuals for Nokia 6088
Summary of Contents for Nokia 6088
- Page 1 Nokia Customer Care 6088 (RM-218) Mobile Terminal RF Description and Troubleshooting Issue 1 10/2006 Company Confidential © 2006 Nokia Corporation...
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Page 2: Table Of Contents
Main RX component ..................13 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 Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 2... -
Page 3: Component Layout
6088 (RM-218) Nokia Customer Care RF Description and Troubleshooting Component Layout Figure 1 shows the main components of the 6088 mobile terminal. RFAntenna Direction Coupler Power Amplifier Cell Duplexer Tx Saw filter RF Transmitter RF Receiver Rx Saw filter Power Management IC... - Page 4 6088 (RM-218) Nokia Customer Care RF Description and Troubleshooting RF Connector 132.768KHz Crystal 19.2MHz TCXO Figure 1: Component layout Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 4...
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Page 5: Tx Troubleshooting
6088 (RM-218) Nokia Customer Care RF Description and Troubleshooting Tx Troubleshooting Tx system block diagram Figure 2: Tx system block diagram Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 5... -
Page 6: Tx Introduction
The driver amplifier output is routed to the final stages of the transmit chain – power amplifier, isolator, duplexer, and antenna. Direction coupler Main TX component Power Amplifier Cell Duplexer TX Saw filter TX IC Power detector Figure 3: Tx components Issue 1 10/2006 © 2006 Nokia Corporation Company Confide ntial Page 6... -
Page 7: Ftm Setup For Tx Troubleshooting
1. Select “FTM mode” in Module Jig 2. Connect RF connector to a spectrum by using CA-89RS RF Test Cable 3. Connect 6088 mobile terminal to a PC via Module Jig, and connect power supply to Module Jig 4. Open RF Tools software in 6088 CCS Level 3 service software 5. -
Page 8: Tx Dc Test Points
2.95V for Lock, 0 V for unlock 1.86V for 5dBm, 2.12V for 15dBm, 2.38V for TX_AGC 25dBm. Tx IQ in 0.84 V With oscilloscope: 500 mV p-p DAC_REF 1.56V VREG_MSMP 2.96V VREG_RFTX 2.64V Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 8... -
Page 9: 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 Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 9... -
Page 10: Tx Dc Test Points
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 10/2006 © 2006 Nokia Corporation Company Confidential Page 10... -
Page 11: Tx Path Troubleshooting
MSM6025 is underfilled and cannot be replaced. • Memory IC is underfilled and cannot be replaced. • The shield case can not be reused after removal. • After using the heatgun, replace the domesheet. Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 11... -
Page 12: Rx Troubleshooting
6088 (RM-218) Nokia Customer Care RF Description and Troubleshooting Rx Troubleshooting Rx system block diagram Figure 8: Rx DC troubleshooting test points Issue 1 10/2006 Company Confidential © 2006 Nokia Corporation Page 12... -
Page 13: 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 RX Saw filter RX IC Issue 1 10/2006 Company Confidential © 2006 Nokia Corporation Page 13... -
Page 14: 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 10/2006 © 2006 Nokia Corporation Company Confidential Page 13... -
Page 15: 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 Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 14... - Page 16 Note that DC is present on the IQ output test points. All test points should be approximately equal. RX _QP RX _QN RX _ IN RX _ IP Figure 11: Cell spectrum (left) and IQ output test points (right) Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 15...
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Page 17: 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 Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 16... -
Page 18: 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 10/2006 © 2006 Nokia Corporation Company Confidential Page 17... -
Page 19: Rx Path Troubleshooting
Memory IC is underfilled and cannot be replaced. • The Shielding Case Assy cannot be reused after removal. • After using the heatgun, the domesheet needs to be replaced. Issue 1 10/2006 © 2006 Nokia Corporation Company Confidential Page 18...