Motorola ASTRO Digital XTL 5000 Detailed Service Manual

6881096C74-B May 25, 2005
Troubleshooting Charts: Flowcharts 5-59
5.6.45 RF Power Amplifier (RFPA)—No or Low TX Power Output (700–800 MHz)—
Part 2 of 5
Figure 5-47. RF Power Amplifier (RFPA)—No or Low TX Power Output (700–800 MHz)—Part 2 of 5
Defective parts
in matching network
between Q6520 and
Q6540-1?
(Note 9)
Repair/replace
defective parts
Yes
No
Defective parts
in matching network
between Q6500 and
Q6520?
(Note 5)
Repair/replace
defective parts
Yes
Q6520 bias voltages
as per Table 1?
(Note 6)
No
Check/repair/replace
defective parts or
GOTO Power Control
- No/low VGBIAS
Chart
Is Q6520,
gate resistance <
1 MOhms?
(Note 7)
Yes
Repair/replace
Q6520 and retune
gate bias via
Tuner
(see help text)
No
No
Yes
Is Q6520,
drain resistance <
1 MOhms?
(Note 8)
Yes
No
Q6540-1 bias
voltages as per Table 1?
(Note 10)
Defective parts
in matching network
between Q6540-1 and
antenna switch?
(Note 13)
Antenna switch
bias voltages as per
Table 1?
(Note 14)
Repair/replace
defective parts
Is Q6540-1,
gate resistance <
1 MOhms?
(Note 11)
Yes
No
Is Q6540-1,
drain resistance <
1 MOhms?
(Note 12)
Yes
No
Repair/replace
defective parts
No
No
Yes
Yes
Yes
No
Repair/replace
Q6520 and retune
gate bias via
Tuner
(see help text)
Check/repair/replace
defective parts or
GOTO Power Control
- No/low VGBIAS
Chart
Repair/replace both
Q6540 and Q6541
(see General Notes)
and retune gate bias
via Tuner
(see help text)
Repair/replace both
Q6540 and Q6541
(see General Notes)
and retune gate bias
via Tuner
(see help text)
B
A
MAEPF-27930-O

Motorola ASTRO Digital XTL 5000 Specifications

General

Brand	Motorola
Model	ASTRO Digital XTL 5000
Category	Radio
Language	English