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Kenwood KA-7090R Service Manual

Kenwood KA-7090R
29 pages
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Knob
(K29-3759-14)
Knob
(K27-2176-04)
Phono
jack
Miniature
phone
jack
(E63-0099-05) (E11-0293-05)
Phono
jack
(E63-0098-05)
Knob
(K29-6391 -04)
Knob
(K29-6390-04)
Dressing
plate
(B0s-2972-1
3)
Knob
(K29-3759-14)
Slide switch
(s62-0034-05)
Screw terminal board
(E70-0063-05)
Power
cord bushing
(J42-0083-05)
Phono
jack
(E63-009e-05)
AC outlet
-
(Eo3-)
AC
power
cord
-
(E30-)
Phono
jack
(E63-01
02-05)
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STEREO INTEGRATED AMPLIFIER
KENWOOD
KA-7090R
SERVICE
MANUAL
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Refer to
parts
list
on
page
26.
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Kenwood KA-7090R Specifications

Power Output IconPower Output
continuous rated output (DIN/IEC)150 W + 150 W
rated output (IEC)115 W + 115 W
output at 4 Ohms85 W + 85 W
Tone Control IconTone Control
bass tone control+10 dB (100 Hz)
treble tone control+10 dB (10 kHz)
loudness control+6 dB (100 Hz)
Input Sensitivity and Impedance IconInput Sensitivity and Impedance
phono (MM) input sensitivity/impedance2.5 mV/47 kOhm
phono (MC) input sensitivity/impedance0.2 mV/100 Ohm
line input sensitivity/impedance200 mV/47 kOhm
Frequency Response IconFrequency Response
line frequency response5 Hz ~ 100 kHz, +0 dB, -3 dB
phono 'RIAA' response20 Hz ~ 20 kHz, +0.3 dB, -0.3 dB
total harmonic distortion0.02 % (20 Hz ~ 20 kHz, 45 W, 8 Ohm)
General IconGeneral
power consumption300 W
dimensions (W x H x D)440 mm x 147 mm x 392 mm
weight (net)11.7 kg

Summary

Contents and Accessories Overview

Service Manual Contents

Lists the main sections and accessories of the service manual.

Disassembly and Repair Procedures

Details the steps for disassembling the unit for servicing and repair.

Circuit Description and Operation

Explains amplifier functions, model variations, and system initialization.

Test Mode Operations

Describes how to enter and utilize diagnostic test modes for troubleshooting.

Microprocessor Details

Covers the microprocessor's block diagram and external connections.

Microprocessor Pin Connections

Visual representation of microprocessor pin assignments and functions.

Microprocessor Pin Data Table

Detailed table of microprocessor pin functions, I/O, and descriptions.

Maintenance and Adjustment Procedures

Outlines the essential procedures for adjusting and maintaining the amplifier.

Component Descriptions and Codes

Explains coding systems for capacitors and resistors, including types and values.

Exploded View and Parts Listing

Illustrates the unit's assembly with exploded views and lists all parts.

Technical Specifications and Repair Notes

Presents performance specifications, general data, and specific repair tips.

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