JVC KS-F185, KS-F185G, KS-F185S Service Manual
SERVICE MANUAL
CASSETTE RECEIVER
MA094B20053
KS-F185,KS-F185S,KS-F185G
KS-F185
Area suffix
UH ---------------------- Thailand
UN --------------------- Indonesia
U -------------------- Other Areas
KS-F185S
Area suffix
UN --------------------- Indonesia
KS-F185G
Area suffix
UN --------------------- Indonesia
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
COPYRIGHT © 2005 Victor Company of Japan, Limited
No.MA094B
2005/3
SPECIFICATION
AUDIO AMPLIFIER SECTION
Maximum Power Output Front 45 W per channel
Rear 45 W per channel
Continuous Power Output
(RMS)
Load Impedance 4 Ω (4 Ω to 8 Ω allowance)
Tone Control Range Bass ±10 dB at 100 Hz
Frequency Response 40 Hz to 20 000 Hz
Signal-to-Noise Ratio 70 dB
Line-Out Level/Impedance 1.0 V/20 kΩ load (250 nWb/m)
Frequency Range FM 87.5 MHz to 108.0 MHz
[FM Tuner] Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)
[AM Tuner] Sensitivity 20 µV
Wow & Flutter 0.15% (WRMS)
Fast-Wind Time 190 sec. (C-60)
Frequency Response 50 Hz to 14 000 Hz (Normal tape)
Signal-to-Noise Ratio 52 dB
Stereo Separation 40 dB
Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System Negative ground
Allowable Operating Temperature 0ºC to +40ºC
Dimensions (W × H × D) Installation Size (approx.) 182 mm × 52 mm × 150 mm
Mass (approx.) 1.3 kg (excluding accessories)
Front 17 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more than
0.8% total harmonic distortion.
Rear 17 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more than
0.8% total harmonic distortion.
Treble ±10 dB at 10 kHz
TUNER SECTION
AM 531 kHz to 1 602 kHz
50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)
Alternate Channel Selectivity (400 kHz) 65 dB
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation 35 dB
Capture Ratio 2.0 dB
Selectivity 35 dB
CASSETTE DECK SECTION
GENERAL
Panel Size (approx.) 188 mm × 58 mm × 11 mm
Design and specifications are subject to change without notice.
1-2 (No.MA094B)
1.1 Safety Precautions
SECTION 1
PRECAUTION
!
Burrs formed during molding may be left over on some parts of the chassis. Therefore,
pay attention to such burrs in the case of preforming repair of this system.
(No.MA094B)1-3
2.1 HOW TO IDENTIFY MODELS
2.1.1 NAME PLATE
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
Discernment sign
1-4 (No.MA094B)
SECTION 3
DISASSEMBLY
3.1 Main body
3.1.1 Removing the front panel assembly
(See Fig.1)
(1) Push the detach button and remove the front panel assem-
bly.
3.1.2 Removing the bottom cover
(See Fig.2)
• Prior to performing the following procedures, remove the front
panel assembly.
(1) Turn the body upside down.
(2) Insert a screwdriver under the joints to release the two
joints a on the left side, the two joints b on the right side and
the joint c on the back of the body, then remove the bottom
cover from the body.
CAUTION:
When releasing the joints using a screwdriver, do not damage
the board.
Joint a
Front panel assembly
Fig.1
Bottom cover
Detach button
Joint
b
3.1.3 Removing the front chassis assembly
(See Fig.3)
• Prior to performing the following procedures, remove the front
panel assembly and bottom cover.
(1) Remove the two screws A on each side of the body.
(2) Release the two joints d and the two joints e on the sides,
then remove the front chassis assembly toward the front.
Joint a
Joint c
Fig.2
Joint d Joint e
A
Joint d
Front chassis assembly
Fig.3
Joint e
Joint b
(No.MA094B)1-5
3.1.4 Removing the heat sink
(See Fig.4)
• Prior to performing the following procedure, remove the front
panel assembly.
(1) Remove the screw B and two screws C attaching the heat
sink on the left side of the body, and remove the heat sink.
3.1.5 Removing the rear panel
(See Fig.5)
• Prior to performing the following procedure, remove the front
panel assembly and bottom cover.
(1) Remove the two screws D , screw E and three screws F at-
taching the rear panel on the back of the body.
D
C
F
B
Heat sink
Fig.4
Rear panel
C
F
3.1.6 Removing the main board
(See Fig.6)
• Prior to performing the following procedures, remove the front
panel assembly, bottom cover, front chassis assembly, heat
sink and rear panel.
(1) Remove the two screws G attaching the main board on the
top chassis.
(2) Disconnect the two connectors (CN901
main board from the cassette mechanism assembly.
and CN721) on the
E
CN721
G
D
Fig.5
Main board
G
CN901
1-6 (No.MA094B)
Fig.6
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