June 15, 2005
6815854H01-A
5-36
Troubleshooting Charts:
Flowcharts
5.6.25 TX or RX VCO Unlock (Fail 001) (380–470 MHz and 450–520 MHz)—Part 2 of 2
Figure 5-27. TX or RX VCO Unlock (Fail 001) (380–470 MHz and 450–520 MHz)—Part 2 of 2
Check 3 Volt
supply path from
Regulator U5750
Check 3 Volt
supply path
Check 3 Volt
supply path
Refer to Chart to determine
which AUX output determines
active VCO.
3VDC
at pin 5 of
U5750?
No
Check 5 Volt
supply path from
regulator U0505
Unlock
RX or
TX?
TX
RX
Yes
Required
Aux pins
at 3.0VDC
for RX?
No
No
Yes
Check
U5752
Check U5753,
Q5708, Q5709,
and Q5710
Yes
Required
Aux pins
at 3.0VDC
for TX?
No
No
Yes
Check
U5752
Check
U5753, Q5706,
and Q5707
3.0VDC at
E6750?
3.0VDC at
E6750?
Yes
A
Содержание XTL 1500
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Страница 25: ...June 15 2005 6815854H01 A xxiv CommercialWarranty Notes ...
Страница 35: ...June 15 2005 6815854H01 A xxxiv Model Numbering Charts and Specifications Notes ...
Страница 49: ...June 15 2005 6815854H01 A 2 12 Product Overview Controller Section Notes ...
Страница 161: ...June 15 2005 6815854H01 A 4 36 Troubleshooting Procedures Power Amplifier Procedures Notes ...
Страница 225: ...June 15 2005 6815854H01 A 5 64 Troubleshooting Charts Flowcharts Notes ...
Страница 429: ...8 2 Flex Cable Pin Out Lists Flex Cables June 15 2005 6815854H01 A Notes ...
Страница 441: ...June 15 2005 6815854H01 A Glossary 10 Notes ...
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