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Motorola ATS 3000 User Manual

Motorola ATS 3000
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February 14, 2012 6816985H01-F
6.1-22 VHF Troubleshooting Charts: VHF Transmitter RF Troubleshooting Chart
6.1.23VHF Transmitter RF Troubleshooting Chart
MAEPF-27349-O
No/Low TX Power
Is B+ at
U101 pins 6,7,
and 14?
Is Vdc
at TP_146
>2V?
Is Vdc
at U101 pin 1
>2V?
Is Vdc
at R103
>1V?
Is
RF at U101
pin 16 >2
dBm?
No
No
Yes
Yes
Yes
Yes
Is
RF at U101
pin 6 >20
dBm?
Yes
Yes
Yes
Is
TX current
>300mA?
Is RF
input drive at
U101 pin 16
>2dBm?
Go to Frequency
Generation Unit
Chart
No
Check E102,
L114
No
Check E140,
L119
No
Check ALC IC
No
Check R108
No
Replace Q198
No
Go to Frequency
Generation Unit
Chart
No
Check C106,
C181 and L101
Replace U101
Is B+
at L125?
No
Yes
No
Is
voltage drop
across D170
>0.5V?
Is
there RF
at connector
J101?
Check U102
and the ALC IC
Check C177, C174,
L172, C175, C172,
L171, C173, L170,
C170 and C171
Remove SH1
and Check
D171
Yes
Check L125, C124,
C125, L126, C126,
L127, C127
and C128
*
*
*
**
*
*
*
*
For Analysis, shields SH103 and SH104 need to be removed.
= Transmitter enable Low.

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Motorola ATS 3000 Specifications

General IconGeneral
BrandMotorola
ModelATS 3000
CategoryTwo-Way Radio
LanguageEnglish

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