EasyManuals Logo

Motorola ATS 3000 User Manual

Motorola ATS 3000
914 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #256 background imageLoading...
Page #256 background image
February 14, 2012 6816985H01-F
6.4-18 700/800 MHz Troubleshooting Charts: 700/800 MHz Frequency Generation Unit Troubleshooting Chart
6.4.19700/800 MHz Frequency Generation Unit Troubleshooting Chart
MAEPF-27346-O
FGU NoLO
Injection/TX
Unlock
For RX check C263,
L258, C267, C261,
R293 and R294 for
continuity.
For TX check C278,
L274, C276, C279,
R273, R274 and R275
Change U250
Replace Y200
and/or C214
Check
U201 circuitry
Replace
U202
Fix/replace
U201
Do a continuity
check and refer to
DC switch chart
Replace
U202
Do a continuity
check and refer to
DC switch chart
Replace
suspected
component
Is Vdc at
D251&D252(RX VCO)
D270(Tx VCO)
0.4<Vdc<12?
Is Vdc at
R259,
High for Tx,
Low for Rx mode
No
Take a continuity
check of traces
to U201
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Is Vdc
at C218 3V?
and C211
5V?
Is there
a voltage reading
at R204, R205, C206,
C207 directed
to U202?
Is Vdc
at Y200 pin 4
3V?
Do you
see 16.8MHz at
pin 3 of Y200 and C214
connection to Xtal
K9 pin of
U202?
Do
you see
16.8MHz at
C245?
Do
you see
~11.5 Vdc at pin 2
of D202?
Replace
U202
Yes
Is
3Vdc at
pin 4 of
D201?
Check components
D201, D202, C206,
C207, C208
and C209
For TX only pin 3 of Q216 (TX)

Table of Contents

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the Motorola ATS 3000 and is the answer not in the manual?

Motorola ATS 3000 Specifications

General IconGeneral
BrandMotorola
ModelATS 3000
CategoryTwo-Way Radio
LanguageEnglish

Related product manuals