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Table Of Contents - JRC NRD-545 Service Manual

Dsp receiver
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INTRODUCTION
This manual describes the basic operating principles of the NRD-545DSP receiver and items required for its
maintenance. Please refer to the User Manual supplied with the equipment for how to operate and handle the
NRD-545.
The NRD-545 consists of eight units. Each circuit has been designed to minimize the number of locations that
might require adjustment with the passage of time, and so increase operating stability. It is therefore only necessary
to service the equipment according to the instructions contained in this manual when a fault becomes apparent.
Please refer to the table of units and be sure to enter the name and type on the form when ordering replacement
unit.
Please refer to the parts lists and enter the unit type, part No., type, and code when ordering parts.
CONTENTS
1.
1
2.
3
2-1
3
2-2
4
3.
5
4.
ASSEMBLY DRAWING
6
5.
BLOCK DIAGRAM
7
6.
DESCRIPTION OF CIRCUITS
8
6-1
OUTLINE OF BLOCKS
8
6-2
DESCRIPTION OF UNITS
9
7.
ADJUSTMENT
15
7-1
PREPARATION
15
7-2
CBD-1363 POWER CIRCUIT
16
7-3
CDE-860 DISPLAY UNIT
17
7-4
CGK-160 REF/DDS UNIT
19
7-5
CGA-184 LOOP1 UNIT
20
7-6
CDA-752 DSP JJNIT
21
7-7
CFH-71 1ST IF UNIT
22
7-8
CFL-356 RF TUNE UNIT
25
7-9
INTEGRATED ADJUSTMENTS
26
7-10
CHE-199 WIDEBAND CONVERTER UNIT
34
8.
TROUBLESHOOTING
41
8-1
SIMPLE PROBLEMS
41
8-2
MORE SERIOUS PROBLEMS
42
8-3
MAINTENANCE
43
9.
CIRCUIT DIAGRAM AND PCB LAYOUT
44
9-1
CIRCUIT DIAGRAM
44
9-2
PCB LAYOUT
56

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