Kenwood GE-940 Service Manual

GEo40
KENWOOD
SERVICE MANUAL
© 1990-7 PRINTED IN JAPAN
B51-4206-00 (O) 1953
Metallic cabinet Front glass Sub panel assy Panel
(A01-1876-01) (B10-1826-03) (A22-1431-02) ({A20-6096-02)
Foot
Knob
Knob
(JO2-1040-05)
x
2
(K29-3991-03)
(K29-3992-04)
AC
power
cord*
AC
outlet*
(E30-)
(E03-)
4
Ges
aa
ane
PS
sss
loo}
Lam’
ae
nll
oy
fs
Ge
Xf
r
0
(ho
A
0
()
h-——)
ayev
Foot
Phono
jack
Rectangular
receptacle
=
Slide
switch*
(J02-0370-05)
x
2
(E13-0446-05)
{E08-0312-05)
(S31-2131-05)
* Refer to parts list on page 24.

Kenwood GE-940 Specifications

Audio Specifications

total harmonic distortion	Less than 0.006% (1kHz)
maximum output voltage	0 V (1kHz)
signal to noise ratio	100 dB (IHF-A network, 1V)

Electrical Specifications

input impedance	47 kΩ
output impedance	2.2 kΩ
power consumption	16 W

Weight and Dimensions

weight	3.4 kg
width	360 mm
height	109 mm
depth	353 mm

Summary

Circuit Description

1. Microprocessor Block Diagram and Key Matrix

Diagram illustrating microprocessor functions and key matrix input.

2. Main Microprocessor: M50945-061SP (IC6)

Details terminal connections, functions, and descriptions for the main microprocessor.

3. Data of MEMORY EQ CURVE

Lists the data points and settings for various memory equalizer curves.

4. TEST MODE

Instructions and operation details for the equipment's test mode.

5. Explanation of Operation of AI LINK

Describes the functionality and indicators related to the AI LINK feature.

6. Transfer Method

Explains the 8-bit data transfer protocol between microprocessors.

7. Display Microprocessor: M50747-D60SP (IC5)

Details terminal connections, functions, and descriptions for the display microprocessor.

8. Display Tube Driving Condition

Explains how the display tube segments and grids are driven by the circuitry.

PC Board Component View

Exploded View

Parts List

Specifications