Motorola Astro XTL 1500 - Figure 5-31. RFPA Power Control-No VGBIAS (380-470 Mhz and 450-520 Mhz); RFPA Power Control-No VGBIAS (380-470 Mhz and 450-520 Mhz)

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