Motorola ASTRO Digital XTL 5000

May 25, 2005 6881096C74-B
5-52 Troubleshooting Charts: Flowcharts
5.6.38 RX Back-End—Poor SINAD or No Audio (700–800 MHz)—Part 3 of 3
Figure 5-40. RX Back-End—Poor SINAD or No Audio (700–800 MHz)—Part 3 of 3
No
3
3
3
2
DC
voltage at
R6007 =
0.0V?
Yes
No
Yes
Freq of
CLKOUT
<1.2MHz?
No
Yes
DC
voltage at
R6007 =
3.0V?
Measure DC
tuning voltage
(Vt) at R6007
Inspect clock oscillator
circuit for solder defects
and/or missing components
Yes
No
Visual
inspection
OK?
Repair defects
and/or replace
suspect components
Replace
varacter diode
D6030
Inspect solder on U6000
and supporting circuitry,
look for missing or
misplaced components
Yes
No
Visual
inspection
OK?
Repair defects
and/or replace
suspect components
Replace
U6000
MAEPF-27808-O