Motorola SSETM 5000 - Manual (Page 127)

6881094C12-A November 11, 2004
Troubleshooting Charts: RX RF 9-23
RX RF—Page 4
Yes
Fbit
< 1.2 MHz?
Measure
tuning voltage
(Vt) at R512
No
No
No
Yes
Yes
Vt= 3 Vdc?
Repair
defects
Replace
Varactor D501
Replace
Abacus
U500
Repair
defects
Visual
examination
OK?
4
Visual
examination
OK?
Remove SH501,
inspect
components
No
Yes
5
5
No
Yes
Remove SH501,
inspect clock
oscillator circuit at
U500-19, 20
Vt = 0 Vdc? 5
Clock
synthesizer
MAEPF-27473-O