User Guide

RH-10
Troubleshooting CCS Technical Documentation
Page 24 Nokia Corporation Confidential Issue 1 09/2002
Voltage on Robin UEM output for mode with test turned on
UHF LO at
1009.62 MHz for
channel 384
10, Figure 1.
Can probe on
top of plastic
to check for
presence of LO,
but won’t read
accurate
power
Power approx. -3 dBm If LO is present but off freq (could
be off by hundreds of MHz), then
VCO G502 is at least putting out a
signal. If LO not present, check
G502, R507, R505, R515 first. Else,
check C511, C501, C532, C550,
R550, C509, R503, C508, R508,
C518, N501, R506, C516, C515,
C521, R513, C504. Lastly, check
R523, R519, R509.
VHF LO at
346.2 MHz for cell
band, any channel
11, Figure 1
(You can touch
top of plastic
to verify pres-
ence of LO, but
this won’t
measure
amplitude
accurately.)
N601, C612, C613, R607, R605,
C632, R606, C618, R609, C629,
V602, C637, V601, C630, C631,
L611, C638, R604, R601, R602
Table 2: RF/Analog Probing for Transmitter
Probing Point
Probing
Location on
the board
Probed Absolute Power (dBm) or
gain/loss (dB) or voltage (v)
Where to start checking if RF
power not correct (soldering,
shorts, DC power applied if
active, correct voltage of DC
signals, otherwise replace)