Rx Back-End-Poor Sinad Or No Audio (136-174 Mhz)-Part 2 Of 3 - Motorola ASTRO Digital XTL 5000 Detailed Service Manual
Vhf,
uhf range 1 and 2
700–800 mhz
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Also See for ASTRO Digital XTL 5000:
- Basic service manual (199 pages) ,
- User manual (162 pages) ,
- Instruction manual (38 pages)
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Troubleshooting Charts: Flowcharts
5.6.5
RX Back-End—Poor SINAD or No Audio (136–174 MHz)—Part 2 of 3
Figure 5-9. RX Back-End—Poor SINAD or No Audio (136–174 MHz)—Part 2 of 3
6881096C74-B
1
Measure
control voltage
at U 000
pin 8
U 000
No
pin 8=1. 5V
Approx.
?
Yes
Inspect 2nd LO VCO
for missing parts or
solder defect
Visual
No
inspection
OK?
Yes
Replace
varacter diode
D 000
Repair defects
and/or replace
suspect parts
MAEPF-27807_VHF-O
5-19
May 25, 2005
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