JVC KSFX-385, KSFX-385-G, KSFX-385-S Service manual
SERVICE MANUAL
CASSETTE RECEIVER
MA093B20054
KS-FX385,KS-FX385S,KS-FX385G
KS-FX385
Area suffix
UT ------------------------- Taiwan
UH ---------------------- Thailand
UN --------------------- Indonesia
U -------------------- Other Areas
KS-FX385S
Area suffix
UN --------------------- Indonesia
KS-FX385G
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.MA093B
2005/4
SPECIFICATION
AUDIO AMPLIFIER SECTION
Maximum Power Output Front 45 W per channel
Rear 45 W per channel
Continuous Power Output (RMS) 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.
Load Impedance 4 Ω (4 Ω to 8 Ω allowance)
Tone Control Range Bass ±10 dB at 100 Hz
Treble ±10 dB at 10 kHz
Frequency Response 40 Hz to 20 000 Hz
Signal-to-Noise Ratio 70 dB
Line-Out Level/Impedance 2.0 V/20 kΩ load (250 nWb/m)
TUNER SECTION
Frequency Range FM 87.5 MHz to 108.0 MHz
AM 531 kHz to 1 602 kHz
FM Tuner Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)
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
AM Tuner Sensitivity 20 µV
Selectivity 35 dB
CASSETTE DECK SECTION
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
GENERAL
Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)
Grounding System Negative ground
Allowable Operating Temperature 0°C to +40°C
Dimensions (W × H × D) Installation Size (approx.) 182 mm × 52 mm × 150 mm
Panel Size (approx.) 188 mm × 58 mm × 11 mm
Mass (approx.) 1.3 kg (excluding accessories)
Design and specifications are subject to change without notice.
1-2 (No.MA093B)
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.MA093B)1-3
2.1 HOW TO IDENTIFY MODELS
2.1.1 NAME PLATE
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
Discernment sign
1-4 (No.MA093B)
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.MA093B)1-5
3.1.4 Removing the side panel
(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 side
panel on the left side of the body, and remove the side panel.
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, two screws E and three screws
F attaching the rear panel on the back of the body.
D
C
B
Side panel
Fig.4
F
Rear panel
EF
C
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, side
panel and rear panel.
(1) Remove the two screws G attaching the main board on the
top chassis.
(2) Disconnect the two connectors CN901
(UT,UH,UN,U version) or CN902 (UT3,UH3,UN3,U3 ver-
sion) on the main board from the cassette mechanism assembly.
and CN721
E
Fig.5
CN721(For UT,UH,UN,U version)
CN902(For UT3,UH3,UN3,U3 version)
G
CN901
D
Main board
G
1-6 (No.MA093B)
Fig.6
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