Motorola ATS 3000

February 14, 2012 6816985H01-F
6.2-22 UHF1 Troubleshooting Charts: UHF Range 1 Transmitter RF Troubleshooting Chart
6.2.23UHF Range 1 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
and L130
No
Check E140
No
Check U102 IC
No
Check R108
No
Replace Q200
No
Go to Frequency
Generation Unit
Chart
No
Check C150,
C169, C100
and L130
Replace U101
Is B+
at L119?
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, C170
and C171
Remove SH103
and Check
D171
Yes
Check C156, C159,
C160, L161, C157,
C158 and L139
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For Analysis, shields SH103 and SH104 need to be removed.
= Transmitter enable Low.