User Guide

CCS Technical Documentation Troubleshooting — RF
RH-17
Issue 1 04/2003 Nokia Corporation Confidential Page 51
RF Power Supplies
Table 13: DC Supplies for RF circuitry
APPENDIX A: Phoenix Instructions
Phoenix Paths:
Local Mode: Troubleshooting - DSP/MCU - Phone Control - Phone State - Local -- Exe-
cute
Normal Mode: Troubleshooting - DSP/MCU - Phone Control - Phone State - Normal --
Execute
Reset Phone: Troubleshooting - DSP/MCU - Phone Control - Phone State - Reset
CDMA RX IF saw (Z753)
out= Batman (N701) in
TP46a
TP47a
You will measure a
loss that is usually
–15 to -17 dBm less
than previous test
point.
Z753, N750 and supporting components
L759, C770, C771, C772, L760, L761,
N701
Batman (N701) out= UEM
(D200) in
TP45
TP46
TP47
TP48
Measure voltage
peak-peak.
RX_IF_AGC PDM
value set to –256.
N701 (VR5, VR7, VIO, ensure 1.35v on
VREFRF01 as in Table 11, also check
RX_IF_AGC as in Table 11), R706, C704,
R705, C706, R435, C428, C435. Check
also the control signals to Bat-
man(N701) PURX (J402),
RF_BUS_EN1X(J608),
RF_BUS_CLK(N507 pin 10) and
RF_BUS_DATA(N507 pin 12).
VHF LO at 256.2 MHz TP49 VHF amplitude is ~ -
7.0 dBm
N701, C701, C714, R703, R702, C715,
R704, V701, C716, L701, C702, R705,
C706.
CLK19M2_B at 19.2 MHz TP50 Amplitude of
-24.0 dBm
Check C513
If signal not present continue TS using
Table 6.
Supply Voltage Supplied Components
VR1A 4.75 VCTCXO, UHF PLL, Charge Pump
VR1B 4.75 Robin
VR2 2.78 Robin, Power Detector
VR3 2.78 Robin, VCTCXO
VR4 2.78 UHF PLL
VR5 2.78 Batman
VR6 2.78 UHF LO Buffer
VR7 2.78 Batman