Motorola ASTRO Digital XTL 5000 Detailed Service Manual

6881096C74-B May 25, 2005
Troubleshooting Charts: Flowcharts 5-51
5.6.37 RX Back-End—Poor SINAD or No Audio (700–800 MHz)—Part 2 of 3
Figure 5-39. RX Back-End—Poor SINAD or No Audio (700–800 MHz)—Part 2 of 3
No
3
3
1
TP6001
= 5.0V?
No
Yes
Yes
TP6001
= 0.0V?
No
Yes
Freq
VCO <71.1
MHz?
No
Yes
Freq
VCO >75.6
MHz?
Measure
control voltage
at TP6001
Inspect 2nd LO VCO
for missing parts or
solder defect
Yes
No
Visual
inspection
OK?
Repair defects
and/or replace
suspect parts
Replace
varacter diode
D6051
MAEPF-27807-O
TP6001
VOLTS DC
NOMINAL
FREQ (MHz)
0.0
1.6
4.0
5.0
68.0
71.1
75.6
77.0

Motorola ASTRO Digital XTL 5000 Specifications

General

Brand	Motorola
Model	ASTRO Digital XTL 5000
Category	Radio
Language	English