June 15, 2005
6815854H01-A
5-42
Troubleshooting Charts:
Flowcharts
5.6.31 RFPA Power Control—No VGBIAS (380–470 MHz and 450–520 MHz)
Figure 5-31. RFPA Power Control—No VGBIAS (380–470 MHz and 450–520 MHz)
Read General
Notes before
proceeding. Read
specific notes as
indicated
START
No
Yes
Repair/replace
U0960
No
No/low
Q5503 pin 7
VGBIAS1?
No/low
Q5503 pin 6
VGBIAS2?
Remove U0960.
TP0937 voltage
2.6-2.8 V?
Yes
Remove U0960.
TP0939 voltage
2.6-2.8 V?
Yes
Remove U0960.
TP0941 voltage
2.0-2.2 V?
No
Repair/replace
U0959. If problem
still not fixed, see
IC communication
in CONTROLLER
section.
Yes
Yes
No
No
Содержание XTL 1500
Страница 1: ......
Страница 5: ...iv June 15 2005 6815854H01 A This page is intentionally left blank ...
Страница 19: ...xviii List of Figures June 15 2005 6815854H01 A This page is intentionally left blank ...
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 ...
Страница 451: ...Index x June 15 2005 6815854H01 A This page is intentionally left blank ...