PAMS
Technical Documentation
NSC/W–1/3
Disassembly & Troubleshooting Instructions
Page 30
Original 11/99
Transmitter Fault TDMA800
The transmitter is the same as in AMPS mode, but the power amplifier is
biased to more linear. Consequently it is essential that the AMPS is free of
any faults.
Is AMPS mode OK ?
Start AMPS
troubleshooting
Check Vbias PIN16
N903
V: > 2.7 V
Start modulator output
tuning. Is one gain step
2 dB in the output
power ?
Change N750
N
Y
N
Y
N
Check CCONT
VR7_bias
(baseband)
and/or COBBA