Transmitter Rf Troubleshooting Procedures - Nokia 6275 Rf Description And Troubleshooting

6275/6275i (RM-154)
RF Description and Troubleshooting
10. Select the following values on the CDMA Control dialog box.
State = Rho ON
•
Band = PCS
•
Radio Configuration = Mode 1: IS-95 Voice
•
Note: Do NOT select the "Set default PDM values" option.
11. Click Execute.
12. Open the Troubleshooting menu, point to RF, and click PDM Control.
13. Configure the spectrum analyzer using the following values:
• Center Frequency = 1880 MHz
• Span = 100 MHz
• Amplitude = 20 dBm
• Attenuation = Auto
• BW = Auto
Description/Field
AGC1
PA_Bias
PA_DC_DC
Pout at RF connector
Current

Transmitter RF Troubleshooting Procedures

After Phoenix is set up using either the AMPS, Cell, or PCS setup procedures, use the
following steps to troubleshoot the transmitter.
1. Using a voltmeter, check to see that all VR2, VR6, and VR1B are on the transmit
system. (See
• If any are missing, look for SMD problems around the Tx IC and the UEMEK.
• If SMD is good, replace the UEMEK.
2. After all DC voltages are present, check the AGC control voltages. (See
Setup" on page 12,
• If the voltages are incorrect, check the SMD around TX_AGC1.
• If the SMDs are correct, replace the D2800.
Page 16
Table 3: RF PDM Values
Reference Value
-130
85
110
+15dBm
340mA
"Tx RF Component Diagram" on page 19.)
"Cell Tx Setup" on page 13, or
Company Confidential
"AMPS Tx
"PCS Setup" on page 15.)
Issue 1 - September 2006