LBI-31511B
Printed in U.S.A.
TABLE OF CONTENTS
Page
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Cover
INITIAL ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Cover
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
PREVENTIVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
PA TRANSISTOR REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
REMOVING IC’s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
REPLACING CHIP COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
PROGRAMMING AND ALIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
SERVICE TIPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
TEST AND TROUBLESHOOTING PROCEDURES . . . . . . . . . . . . . . . . . . . . . . .
4
TRANSMITTER ALIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7
RECEIVER ALIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11
RECEIVER AUDIO AND SQUELCH WAVEFORM CHECKS . . . . . . . . . . . . . . . . . .
14
MECHANICAL LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15
INTERCONNECTION DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17
MAINTENANCE MANUAL
403-430 MHz & 450-512 MHz, DELTA-S NARROWBAND
TWO WAY FM RADIO
SERVICE SECTION
DESCRIPTION
The service section of this manual contains the diagnostic
routines, and other maintenance information to service this
radio. The service section includes:
•
System interconnections.
•
Mechanical layout.
•
Disassembly procedures.
•
Replacement of IC’s chip capacitors and resistors.
•
Alignment procedures for the transmitter and re-
ceiver.
•
Troubleshooting flow charts and waveforms.
INITIAL ADJUSTMENT
After the radio has been installed (as described in the
Installation Manual), the following adjustments should be
made by a certified electronics technician.
Summary of Contents for LBI-31511B
Page 15: ... 19D901350 Sh 1 Rev 10 RECEIVER AUDIO AND SQUELCH WAVEFORM CHECKS LBI 31511 LBI 31511 14 ...
Page 16: ... 19D900977 Sh 1 Rev 20 MECHANICAL LAYOUT LBI 31511 LBI 31511 15 ...
Page 17: ... 19D900977 Sh 2 Rev 14 MECHANICAL LAYOUT LBI 31511 LBI 31511 16 ...
Page 18: ... 19D900980 Sh 1 Rev 4 INTERCONNECTION DIAGRAM LBI 31511 LBI 31511 17 ...
