Nokia 5510 - Page 44

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RF Troubleshooting PAMS Technical Documentation
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Measure TX
power on "ANT"
Power > 27.5 dBm
in 50 ohm
Measure TX
power on "Pout".
Power ~7 dBm in
500 ohm
Measure TX
power on "Pin".
Power ~-17 dBm
in 500 ohm
No
Measure TX
power unbal T503.
Power ~18 dBm in
500 ohm
With Osc check:
VTX = 2.7V +
discretes around
T503
Check POGO
pins, C593, L510
Yes
Measure TX power
on DCS_Tx. Power
~7 dBm in 500 ohm
With Osc on
RXTX switch
check: Vc1 =
2.7V, Vc2 = 0V
Yes
Check L515
(Coupler)
Check RXTX
switch
Yes
Check Hagar +
Serial bus
With Osc on PA
check:
Vpctrl GSM1800.
Vpctrl ~ 1.5Vpp
Yes
Check PA N502
Yes
No No
Yes
No
No No
Check R542,
R539, R543, C566
Yes
No
With Osc check
TXC (see figure ?)
With Osc check
"Vpctrl" = "TXC"?
Yes
No
Check V503 +
discretes around
No
No