Nokia RH-17 Series Troubleshooting - Rf page 43

CCS Technical Documentation
PDM
voltage
value
typical v
-409 0.17
-409 0.17
-409 0.17
-249 0.45
-104 0.70
37 0.95
-403 0.18
-403 0.18
200 1.25
450 1.70
511 1.81
See Table 3 for test points for AGC.
IMPORTANT NOTE: AGC PDM values will change (sometimes drastically) as the phone
warms up. The table above lists PDM values for when the phone is first turned on. After
10 minutes at full power, PDM values will be different.
Probing Point
Robin Tx I/Q input from UEM
Issue 1 04/2003
PDM voltag
value e
typical v
-110 0.68
-92 0.72
-76 0.75
-66 0.77
-56 0.78
-48 0.80
-115 0.680
100 1.067
100 1.067
105 1.076
170 1.190
Table 2: RF/Analog Probing for Cell/AMPS Transmitter
Probing
Location on the
board
TP1a, TP1b, TP1c
and TP1d
Nokia Corporation
Balun Out PDM value
dBm typical
-15.2 +/- 3 dB -19
-13.2 +/- 3 dB -123
-15.4 +/- 3 dB -310
-19.4 +/- 3 dB -330
-22.4 +/- 3 dB -330
-27.9 +/- 3 dB -330
CELL CDMA
-14 +/- 3 dB 220
-38 +/- 3 dB -270
-56 +/- 3 dB -331
-70 +/- 3 dB -331
-80 +/- 3 dB -331
Probed Absolute
Power (dBm), or
gain/loss (dB),
or voltage (v)
Check with Osc
probe for Input,
check also for
same dc offset on
each point.
Confidential
RH-17
Troubleshooting — RF
voltage connector
v dBm
24.8 (PL0)
0.85
0.67 23.7 (PL3)
21.0 (PL4)
0.34
16.3 (PL5)
0.31
13.5 (PL6)
0.31
10.4 (PL7)
0.31
1.29 25
0.41 -2
0.31 -23
0.31 -39
0.31 -50
Where to start checking if RF
power not correct (soldering,
shorts, DC power applied if active,
correct voltage of DC signals,
otherwise replace)
Check that UEM and Robin are sol-
dered correctly.
Page 43