Motorola ASTRO Digital XTL 5000 Detailed Service Manual

6881096C74-B May 25, 2005
Troubleshooting Charts: Flowcharts 5-65
5.6.51 RFPA Power Control—No or Low TX RFPA_CNTRL (700–800 MHz)—Part 1 of 2
For each flowchart step in which reference is made to a note, be sure to refer to that specific note
(located on page 66 of this flowchart) for guidance in performing the actual troubleshooting
procedure.
Figure 5-51. RFPA Power Control—No or Low TX RFPA_CNTRL (700–800 MHz)—Part 1 of 2
Read General
Notes before
proceeding, Read
specific notes as
indicated
START
Remove Q0954.
Proper power
restored?
(Note 1)
Remove D0950.
Proper power
restored?
(Note 2)
Yes
No
U0956-3, pin 10
~ 1.5V?
No
Yes
Repair/replace
defective parts or
see
Controller
GPIO section
Repair/replace
defective parts
No
VCC3 present at
U0963, pin 5?
(Note 3)
VCC5 present at
U0963, pin 1?
No
See
Controller
VCC5 section
Yes
Remove R0974.
VCC3 present at
U0963, pin 5?
(Note 4)
Yes
Repair/replace
defective parts
Repair/replace
U0963
No
No
Repair/replace
defective parts
YesYes
A
TP0955 voltage
~ 1.5V?
Repair/replace
defective parts
Yes
A
Remove D0951.
Proper power
restored?
(Note 5)
Repair/replace
defective parts
Yes
No
VFORWARD buffer
functioning properly?
(Note 6)
U0959 functionally
properly?
(Note 7)
No
Repair/replace
defective parts
Yes
Repair/replace
defective parts or
see
Controller
GPIO section
No
MAEPF-27927-O
Go to
Controller
GPIO Section
No
Yes

Motorola ASTRO Digital XTL 5000 Specifications

General

Brand	Motorola
Model	ASTRO Digital XTL 5000
Category	Radio
Language	English