Motorola ASTRO Digital XTL 5000

6881096C74-B May 25, 2005
Troubleshooting Charts: Flowcharts 5-45
5.6.31 RFPA Power Control—No VGBIAS (380–470 MHz and 450–520 MHz)
Figure 5-33. 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