Rfpa Power Control-No Vgbias (700-800 Mhz); Figure 5-48. Rfpa Power Control-No Vgbias (700-800 Mhz) - Motorola ASTRO XTL 1500 Detailed Service Manual

Troubleshooting Charts: Flowcharts
5.6.50 RFPA Power Control—No VGBIAS (700–800 MHz)
START
Read General
Notes before
proceeding. Read
specific notes as
indicated
No/low Q6540
VGBIAS1?
No
No/low Q6541
VGBIAS2?
No
Figure 5-48. RFPA Power Control—No VGBIAS (700–800 MHz)
6815854H01-A
Remove U0960.
Yes
TP0937 voltage
2.6-2.8 V?
No
Remove U0960.
Yes
TP0939 voltage
2.6-2.8 V?
No
Remove U0960.
TP0941 voltage
2.0-2.2 V?
No
Yes
Yes
Yes
Repair/replace
U0960
Repair/replace
U0959. If problem
still not fixed, see
IC communication
in CONTROLLER
section.
MAEPF-27928-O
June 15, 2005
5-61