Kenwood R-SE7 Service Manual

STEREO INTEGRATED AMPLIFIER/TUNER
R-SE7/SE-7(G)
SERVICE MANUAL
©1997-10/B51-5373-00 (K/K) 3191
stereo integrated amplifier/tuner
on/standby
phones
down up
volume
control
pure
input selector
N.B.
pure
enter
band
auto/mono
turning
SPEAKER
(6 – 16 Ω)
R
L
SUB
WOOFER
PRE OUT
FM75Ω
FM300Ω GND
AM
ANTENA
SYSTEM
CONTROL
R
L
IN IN
CD AUX
REC OUT PLAY OUT REC OUT PLAY OUT
TAPE
MD
Panel *
(A60-)
Front glass
(B10-2373-03)
Indicator
(B12-0322-04)
Panel *
(A60-)
AC power cord *
(E30-)
Lock terminal board *
(E70-)
Phono jack
(E63-1014-05)
Phono jack
(E63-0046-15)
Phono jack
(E63-0047-15)
Rectangular receptacle
(E08-0312-05)
Metallic cabinet *
(A01-)
Lock terminal board
(E20-0476-05)
Power cord bushing
(J42-0083-05)
Knob
(K29-6744-04)
Escutcheon
(B07-2363-04)
Indicator
(B12-0320-04)
Knob
(K29-6358-04)
Knob
(K29-6750-03)
Escutcheon
(B07-2367-03)
(HM-701)
PRECAUTIONS FOR REPAIR
• For the SERIAL TEST CODE LIST of the circuit description, see Service manual (B51-5210-00) of R-SA7.
• No connection of ground line if disassemble the unit.
• Please connection the ground line on rear panel, PCBs, Chassis and some others.
* Refer to parts list on page 25.
R-SE7/SE-7(G)(K) COVER( 97.11.28 0:22 AM y[W 2
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25/8/2013
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Kenwood R-SE7 Specifications

Amplifier Section

rated power output (Class AB operation)	20 watts per channel minimum RMS, both channels driven, at 6 Ω, 1 kHz with no more than 10% total harmonic distortion
rated power output (Class A operation)	7.55 watts per channel minimum RMS, both channels driven, at 6 Ω, 1 kHz with no more than 10% total harmonic distortion
total harmonic distortion	0.02% (1 kHz, 10 W, 6 Ω)
frequency response	20 Hz ~ 40 kHz, +0 dB, -3 dB
input sensitivity/impedance	200 mV / 47 kΩ

FM Tuner Section

tuning frequency range	87.5 MHz ~ 108 MHz
usable sensitivity (DIN) MONO	1.2 µV (75 Ω) / 13.2 dBf (40 kHz DEV., S/N 26 dB)
signal to noise ratio MONO	65 dB
signal to noise ratio STEREO	58 dB
selectivity (DIN ±300 kHz)	64 dB

AM Tuner Section

tuning frequency range	531 kHz ~ 1, 602 kHz
usable sensitivity	15 µV (500 µV/m)
signal to noise ratio	48 dB
output level/impedance	0.18 V / 1 kΩ

General Specifications

power consumption	45 W
dimensions	W: 200 mm, H: 77 mm, D: 278 mm
weight (net)	3.0 kg

Summary

Circuit Description Overview

Initial State and Backup Functions

Details initial states of AMP, TUNER, TIMER blocks and the unit's backup function.

Tuner Destination List and Test Modes

Covers tuner destination list, initialization, and AMP test mode procedures.

Test Mode Operations and Microprocessor Block Diagram

Explains various test modes and presents the microprocessor peripheral block diagram.

Microprocessor Pin Descriptions

Lists and describes the pin functions of the microprocessor.

Adjustment Procedures

FM and Audio Section Adjustments

Details adjustment procedures for FM tuner and audio sections.

System Connections for Adjustment

Illustrates system connections required for adjustment procedures.

Component Identification and Parts List

Component Coding and Descriptions

Explains coding for capacitors, resistors, and provides component descriptions.

Comprehensive Parts Listings

Provides detailed lists of parts with reference numbers and destination codes.

PC Board Layouts

Tuner and Audio Unit PC Board Views

Shows component-side views of tuner and audio unit PC boards.

Schematic Diagram Overview

Presents the overall schematic diagram for unit operation.

Exploded View of Unit Components

Unit Component Assembly Diagrams

Displays exploded views of unit components with reference numbers.

Technical Specifications

Amplifier and Tuner Performance Specs

Details performance specifications for amplifier and tuner sections.

General Unit Specifications

Provides general specifications like power consumption and dimensions.