Kenwood R-2000 Service Manual

$KEN\NOOD
SERVICE
MJ\NUl\L
R-2000
DCK-1
COMMUNICATIONS
RECEIVER
CONTENTS
SPECIFICATIONS
........................................................... 2
DISASSEMBLY .............................................................
22
CIRCUIT
DESCRIPTION
.................................................. 3
PACKING
..........................
:·
...........................................
23
PARTS
LIST
..................................................................
11
ADJUSTMENT
.............................................................
24
PC
BOARD
VIEW
AND
SCHEMATIC
DIAGRAM
ADJUSTMENT POINT ..................................................
29
RX
UNIT (X55-1340-00)
.......................................
16
TERMINAL FUNCTION
.................................................
30
PLL
UNIT (X50-1920-00)
......................................
18
BLOCK DIAGRAM ........................................................
31
SWITCH UNIT (X41-1480-00) .............................
20
DCK-1
(OPTION)
........................................
BACK
COVER
SCHEMATIC
DIAGRAM ...............................................
21

Kenwood R-2000 Specifications

General

Tuning Range	150 kHz - 30 MHz
Sensitivity (SSB, CW)	0.5 µV
Signal to Noise Ratio (MW)	50 dB
Signal to Noise Ratio (LW)	50 dB
Distortion (FM)	0.5%
Frequency response (FM)	30 Hz - 15 kHz
Power Supply	AC 120/220 V, 50/60 Hz
Sensitivity (FM)	1.0 µV
Selectivity (SSB, CW)	2.4 kHz (-6 dB)
Output	Speaker, Line out
Mode	AM, FM, SSB

Summary

SPECIFICATIONS

CIRCUIT DESCRIPTION

RX Unit X55-1340-00

Detailed description of the R-2000's receiver unit circuitry and operation.

PLL Unit X50-1920-00

Explanation of the Phase Locked Loop unit's circuit and functions, including frequency synthesis.

PC BOARD VIEW

Unit Component Layouts

Component layouts for RX, PLL, Encoder, and Switch units showing PCB placement.

SCHEMATIC DIAGRAM

Unit Schematic Diagrams

DISASSEMBLY

R-2000 Exploded View

ADJUSTMENT

Test Equipment and Preparation

PLL and Encoder Adjustments

Steps for adjusting PLL section, VCO, encoder, and PG SCAN speed.

Receiver Adjustments

Procedures for adjusting receiver parameters like sensitivity, S meter, and squelch.

NB, IF Trap, and Microprocessor Checks

ADJUSTMENT POINT

PCB Adjustment Locations

BLOCK DIAGRAM