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SERVICE MANUAL
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED
No.49873
2003/6
CASSETTE RECEIVER
49873
2003
5
KS-FX845R
TABLE OF CONTENTS
1
Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3
Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
4
Description of major ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
KS-FX845R
Area Suffix
EE --------- Russian Federation


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1-2 (No.49873)
SPECIFICATION
Design and specifications are subject to change without notice.
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
40 Hz to 20 000 Hz
at no more than 0.8% total harmonic distortion.
Rear
17 W per channel into 4
40 Hz to 20 000 Hz
at no more than 0.8% total harmonic distortion.
Load
Impedance
4
(4 to 8 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 k
load (250 nWb/m)
TUNER SECTION Frequency Range
FM1/FM2
87.5 MHz to 108.0 MHz
FM3
65.00 MHz to 74.00 MHz
AM
(MW) 522 kHz to 1 620 kHz (LW) 144 kHz to
279 kHz
[FM Tuner]
Usable Sensitivity
11.3 dBf (1.0
µV/75 )
50 dB Quieting
Sensitivity
16.3 dBf (1.8
µV/75 )
Alternate Channel
Selectivity (400 kHz)
65 dB
Frequency
Response
40 Hz to 15 000 Hz
Stereo Separation
35 dB
Capture Ratio
1.5 dB
[MW Tuner]
Sensitivity
20
µV
Selectivity
35 dB
[LW Tuner]
Sensitivity
50
µV
CASSETTE DECK
SECTION
Wow & Flutter
0.11% (WRMS)
Fast-Wind Time
100 sec. (C-60)
Frequency Response
30 Hz to 16 000 Hz(Normal tape)
Signal-to-Noise Ratio
56 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
0ºC to +40ºC
Dimensions (W
× H × D)
Installation Size (approx.)
182 mm
× 52 mm × 150 mm
Panel Size (approx.)
188 mm
× 58 mm × 12 mm
Mass (approx.)
1.5 kg (excluding accessories)


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(No.49873)1-3
SECTION 1
Precautions
1.1
Safety Precautions
!
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.


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1-4 (No.49873)
SECTION 2
Disassembly method
2.1
Main body
2.1.1
Removing the front panel assembly
(See Fig.1)
· Press the release button and remove the front panel assembly.
Fig.1
2.1.2
Removing the bottom cover
(See Fig.2)
· Prior to performing the following procedures, remove the front
panel assembly.
(1) Turn the main body upside down.
(2) Insert a screwdriver under the joints to release the two
joints a on the left side, two joints b on the right side and
joint c on the back side of the main body, then remove the
bottom cover from the main body.
CAUTION:
When releasing the joints using a screwdriver, do not damage
the main board.
Fig.3
2.1.3
Removing the front chassis assembly
(See Figs.3 and 4)
· Prior to performing the following procedures, remove the front
panel assembly and bottom cover.
(1) Remove the two screws A on the both sides of the main
body. (See Fig.3.)
(2) Remove the two screws B on the front side of the main
body. (See Fig.4.)
(3) Release the two joints d and two joints e on the both sides
of the main body, then remove the front chassis assembly
toward the front. (See Fig.3.)
Fig.3
Fig.4
Release button
Front panel assembly
Bottom cover
Joint a
Joint b
Joint a
Joint b
Joint c
Joint d
Joint d
Front chassis assembly
A
Joint e
Joint e
A
B
Front chassis assembly


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(No.49873)1-5
2.1.4
Removing the heat sink
(See Fig.5)
· Prior to performing the following procedure, remove the front
panel assembly.
(1) Remove the two screws C and screw D attaching the heat
sink on the left side of the main body, and remove the heat
sink.
Fig.5
2.1.5
Removing the rear panel
(See Fig.6)
· Prior to performing the following procedure, remove the front
panel assembly and bottom cover.
(1) Remove the two screws E, three screws F and three
screws G attaching the rear panel on the back side of the
main body.
Fig.6
2.1.6
Removing the main board
(See Fig.7)
· 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 H attaching the main board on the
top chassis.
(2) Disconnect the connector CP401 on the main board from
the cassette mechanism assembly.
Fig.7
C
D
Heat sink
G
E
E
F
Rear bracket
G
H
Main board
CP701
H