Jvc KSRX 147 Service Manual

Page 1

KS - RX147 C/J

.JVE:
SERVICE

KS-RX147 cu

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Contents

. Specifications ------------ "@3932
. instructions -- .3
. Location of Main Parts~~ -~ 10
. Removal of Main Parts ..................................... 11
. Analytic Drawing and Parts List---- .. 14
. Main Adjustment ........................ .. 19
_ Block Diagram ................................................... 24

8. Location of P. C. Board Pans ~~~~~~~~~~~~~~~~~
9. Standard Schematic Diagram-'
10. C Block Diagram ..............................
11 \Mring Connections .......................................... 32
12. Electrical Parts List ~~~~~~~~~~~~~~~~~~~~~~~~~~~

13. Illustration of Packing and Pans List _
14_ Accessories .....................................

No.49236
January 1995

Page 2

KS 4 RX147 C/J

1. Specifications

AUDIO AMPLIFIER SECTION
Maximum Power Outputthront) 22 watts per channel
(Rear) 22 watts per channel

Continuous Power Output (HMS): (Front)8 watts per
channel into 4 O, 40 to 20.000 Hz at no more than
0.8% total harmonic distortion. (Rear) 8 watts per
channel into 4 Q. 40 to 20,000 Hz at no more than
0.8% iotai harmonic distortion.

Load Impedance: 4 n (4 - 8n Allowable)

Tone Control Range
Bass: 210 dB at 100 Hz
Treble: :10 dB at 10 kHz

Frequency Response: 40 - 20,000 Hz

Signal-to-Noise Flatio: 60 dB

RADIO SECTION
Frequency Range
FM: 87.5 - 107.9 MHz (C/J)
87.5 -108.0 MHz iA/Ul
AM: 530 - 1,710 kHz (C/J)
531 - 1,620 kHz (A/U)
(C: Canada, J: U.S.A.,A:Australia, U: Other areas)

(FM Tuneri
Usable Sensitivity: 15.3 dBf (1.6 ,N/75 m
50 dB Quieting Sensitivity: 18.8 dBt (2,4 uV/75 Si)
Alternate Channel Selectivity (400 kHl): 65 dB
Frequency Response: 40 - 15,000 Hz
Stereo Separation: 35 dB
Capture Rati . .0 dB
(AM Tuner)
Sensitivity: 20 MV
Selectivity: 35 dB
CASSETTE DECK SECTION
Wow & Flutter: 0.11 % (WRMS)
Fast Wind Time: 100 sec. (C-60)
Frequency Response:
50 - 14,000 Hz (:3 dB)
Signal-to-Noise Ratiozsz dB
Stereo Separation: 40 dB

IMPORTANT INFORMATION

1. This unit ls designed to operate with 12 volts DC.
NEGATIVE ground electrical systems only.

2. Replace the Iuse with one of the specified rating. II
the fuse blows Irequently. consult your JVC car
audio dealer.

3. Do not touch the highly-polished head with any
metallic or magnetic tools.

4. It noise is a problem...

This unit incorporates a noise filter in the power
circuit. However. with some vehicles. clicking or
other unwanted noise may occur. II this happens.
connect the units rear ground terminal to the cars
chassis using shorter and thicker cords. such as
copper braiding or gauge wire. lt noise still
persists. consult your JVC car audio dealer,

5. Never play dirty or dusty tapes since they will
greatly degrade the sound and perlormance oi
your unit. Always keep your tapas clean.

Antenna noise
It you can hear static noise when listening to both AM
and FM. check lor loose antenna connections.

2 (No. 49236)

GENERAL
Power Requirement:

Operating Voltage: DC 14.4 V (11 V -- 16 V

Allowable)

Grounding System: Negative Ground
Dimensions (W x H )g D)

Chassis: 178 x 50 x 134 mm

(7-1/16" x 2" x 5-5/16"i
Nosepiece: 105 x 42 x 35 mm
(4-3/16" x 1-11/16" x 1-7/16)

Control Shaft Pitch: 148 mm (5-7/8")

Gross Weight: 1.5 kg (314 lbs)

Design and specifications subject to change with-
out notice.

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