JVC KS-FX230 User manual

KS-FX230
1-1
SERVICE MANUAL
CASSETTE RECEIVER
No.49565
Jul. 2000
COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD.
KS-FX230
KS-FX230
Area Suffix
UF ------------------ China
Contents
Safety precaution 1-2
Disassembly method 1-3 Adjustment method 1-9
Description of major ICs 1-12
This service manual is printed on 100% recycled paper.
MO/RND SCAN/RPT
SOUND
LOUD
DISP
PROGBAND
Multi
Music
Scan
CD CHANGER CONTROL
SEL SSM
78 9101112
123456
40W X 4
/I
ATT
CD- CH TUNER TAPE
KS-FX230

KS-FX230
1-2
!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.
Safety precaution

KS-FX230
1-3
Disassembly method
1. Disengage the four tabs in the right and left side of
unit and pull the front chassis forward to remove it.
Removing the front chassis (see Fig.1)
Removing the bottom cover and heat
sink (see Fig.2,3)
Removing the main board (see Fig.4)
Removing the rear panel (see Fig.4)
Removing the mechanism ass'y (see Fig.5)
Removing the front panel unit (see Fig.6)
1.
2.
3.
Remove one screw Aretaining the IC to the heat sink.
Remove two screws Bto remove the heat sink.
Turn the upside down, the insert and turn the screwdriver
to remove the bottom cover and protect sheet.
1.
2.
3.
Remove two screws Cretaining the rear panel to the
chassis.
Remove two screws Dretaining the main board.
Lift up the main board to remove it. At this time,
remove the connector CP702 connecting the main
board and mechanism assembly.
1.
2.
3.
4.
Remove six screws retaining the jacks or the like.
Remove two screws Eto the 16-pin jack.
Remove one screw Fto remove the line-out jack.
Remove one screw Gto remove the antenna jack.
Remove one screw Hto remove the changer
controller jack.
1.
2.
3.
Remove four mechanism mounting screws Iretaining
the mechanism assembly.
Remove four screws Jretaining the cover.
Remove one screw which is the fixation of top cover
and the substrate.
1. Remove four screws Kretaining the rear cover.
Front chassis
Fig. 1
Bottom cover
Fig. 2
Heat sink
Left side view
Fig. 3
Main board
CP702
Connection to the mechanism
connector position
Fig. 4
A
BB
D
C
EHFGC
Fig. 6
Mechanism ass'y
Fig. 5
JJ
JJ
KK
KK

KS-FX230
1-4
<< Cassette mechanism section >>
1.
2.
3.
4.
Desolder the lead wires of the loading motor at the 2
positions shown (Red and Black).
Desolder the lead wire of the head at the 3 positions
shown (RED,Yellow and Black).
Remove the three screws Asecuring the head relay
board.
Shift the interlocking section asecuring the head
relay board in the direction shown by the arrow to
remove the board.
Removing the head relay board (see Fig.1)
Removing the load arm ass'y (see Fig.2)
Removing the cassette holder and arm
ass'y (see Fig.3)
Removing the sub chassis ass'y (see Fig.4)
1.
2.
3.
Shift the load arm ass'y counter clockwise.
Remove the load arm ass'y from the catch.
Using tweezers, detach the mylar washer 1securing
the load arm ass'y and pull out the load arm ass'y.
NOTE : When reassembling, be sure to use a new
mylar washer.
1.
2.
3.
4.
5.
Remove the head relay board.
Remove the load arm ass'y.
Apply DC 6V to the lead wire of the loading motor
ass'y and turn the load gear ass'y to the position
shown in Fig.3.
Remove the screw Bsecuring the cassette holder
and holder arm ass'y.
Shift the cassette holder and holder arm ass'y in the
direction shown by the arrow and remove them from
the interlocking section bof the sub chassis ass'y.
1.
2.
3.
4.
Remove the head relay board.
Remove the load arm ass'y.
Remove the cassette holder and holder arm ass'y.
Remove the two screw Cand Dsecuring the sub
chassis ass'y.
NOTE : When removing the sub chassis ass'y, the
mode gear may become detached. In this
case, set it back to the original position.
Red
Red
Black
Black Yellow Head relay board
Fig. 1
A
AA a
Catch
Load arm ass'y Fig. 2 1
Apply DC 6V
Fig. 3
Loading motor ass'y
Loading gear ass'y
Sub chassis ass'y
Cassette holder
Holder
CD
b
B

KS-FX230
1-5
1.
2.
3.
4.
5.
6.
Remove the head relay board.
Remove the load arm ass'y.
Remove the cassette holder and holder arm ass'y.
Remove the sub chassis ass'y.
Disengage the spring holding the play head down.
Remove the two screws Esecuring the play head.
Removing the play head (see Fig.4)
Removing the pinch roller ass'y (see Fig.5,6)
Removing the reel disk ass'y (see Fig.7)
6. Pull out the pinch rollers.
1.
2.
3.
4.
5.
Remove the head relay board.
Remove the load arm ass'y.
Remove the cassette holder and holder arm ass'y.
Remove the sub chassis ass'y.
Detach the mylar washers cat the two positions
securing the right and left pinch roller ass'y.
1.
2.
3.
4.
5.
Remove the head relay board.
Remove the load arm ass'y.
Remove the cassette holder and holder arm ass'y.
Remove the sub chassis ass'y.
Detach the mylar washer dfrom the tip by first
pressing down the reel feather to expose it.
NOTE : When reassembling, be sure to use a new
mylar washer
NOTE : When reassembling, be sure to use new
mylar washers. Also, make sure that grease
is not adhering to the pinch rollers.
Play head
Spring
Fig.4
Pinch roller ass'y
Fig.5
Sub chassis
Pinch roller ass'y
Fig.6
Fig.7
Reel feather
push
Reel disk ass'y
E
c
E
c
d

KS-FX230
1-6
1.
2.
3.
4.
5.
6.
7.
8.
9.
Remove the head amp PCB.
Remove the load arm ass'y.
Remove the cassette holder and holder arm ass'y.
Remove the sub chassis ass'y.
Remove the right and left pinch roller ass'y.
From the rear of the head plate, detach the mylar
washer eand the washer pressing the forward/
reverse plate down. (see Fig. 8)
Remove the screw Ffixing the metal detection lever
and removal spring as shown in Fig. 8.
Remove the head plate.
Pull out the mode gear. (see Fig. 9)
Removing the head plate (see Fig. 8,9)
1.
2.
3.
4.
5.
6.
7.
8.
Remove the head relay PCB.
Remove the load arm ass'y.
Remove the cassette holder and holder arm ass'y.
Remove the sub chassis ass'y.
Remove the head plate.
Disengage the main belt from the flywheel ass'y.
(see Fig. 8)
Remove E washers fat the two positions which
secure the capstan shaft away from the surface.
(see Fig. 9)
Pull out the flywheel ass'y from the rear.
Removing the flywheel ass'y (see Fig. 9)
1.
2.
3.
4.
5.
6.
7.
Remove the head relay PCB.
Remove the load arm ass'y.
Remove the cassette holder and holder arm ass'y.
Remove the sub chassis ass'y.
Straighten the curved tab gsecuring the reel disk
PCB. (see Fig. 10)
Remove the two screws Gfixing the reel disc PCB.
Remove the reel disk PCB.
Removing the reel disk PCB (see Fig. 10)
NOTE : When installing the mode gear, set it to the
arrow mark.
Forward/reverse plate
Spring
Metal tape detection lever
Main belt
Fig.8
Head plate
Capstan shaft
Marking
Mode gear
Fig.9
Reel desk PCB
Fig.10
e
F
ff
gG

KS-FX230
1-7
NOTE : When reassembling, be sure to use a new
mylar washer.
1.
2.
3.
Remove the head relay ass'y.
Remove the load arm ass'y.
Remove the Mylar washer hfixing the worm gear.
(see Fig.11)
4.
5.
Remove the screw Hfixing the loading motor ass'y.
(see Fig.11)
Remove the two screws Ifixing the loading motor
ass'y. (see Fig 11)
NOTE : The set arm ass'y and the mode gear
should be positioned as shown in Fig.12.
3. Attach the cassette holder as shown in Fig.13. In this
case, first pass the tab of the section ithrough the
mechanism j, then attach the cassette holder in the
direction shown by the arrow.
Removing the loading motor ass'y
(see Fig. 11)
(Procedures for reassembling)
1.
2.
Insert the mode gear into the sub chassis ass'y.
Install the sub chassis ass'y and secure it with the
two screws Cand Das shown in Fig.12.
Loading motor ass'y
Worm gear
Motor bracket
Hh
I
Sub chassis ass'y Fig.11
C
D
Sub chassis ass'y
Mode gear Set arm ass'y
Fig.12
Cassette holder i
j
Fig.13

KS-FX230
1-8
4. Set the catch to the holder arm ass'y as shown in
Fig.14.
5.
6.
7.
While attaching the holder arm ass'y to the cassette
holder, insert the shaft of the holder arm ass'y into
the interlocking section kof the sub chassis ass'y as
shown in Fig.15.
Install the spring attached to the folder arm ass'y
shaft over the set arm ass'y as shown in Fig.16.
After the holder arm ass'y is installed, secure it with
the screw B. (see Fig.15)
8.
9.
10.
After the installation, apply DC 6V to the lead wires
of the loading motor ass'y to locate the load gear
ass'y as shown in Fig.17.
Install the load arm ass'y.
Install the head relay PCB.
11. Solder the loading motor and head lead wires to the
head relay PCB, respectively. (see Fig.19)
NOTE : Install it so that the slide switch lever of the
head relay PCB is set in the PCB stay hook
of the sub chassis ass'y. (see Fig.18)
Holder arm ass'y
Cassette holder
Refer to Fig.16
Apply DC 6V
Catch
Holder arm ass'y
Fig.14
B
k
Holder arm ass'y
Spring
Set arm ass'y
Fig.15
Fig. 16
Fig. 17
Loading motor
Head PCB
Fig.19
Slide switch
PCB stay
Fig.18

KS-FX230
1-9
Adjustment method
Electoronic voltmeter
Audio frequency osillator
(range ; 50 20kHz and outp ut 0 dB with impedance of
660 )
Attenuator (impedance;600 )
Frequency counter
AM Standard signal generator
FM Standard signal generator
Wow flutter mater
Torqu testing cassette gauge
CTG N (mechanical adjusting)
TW 2111A (FWD play)
TW 2121A (REV play)
Standard tape
VT712 or VTT712 (tape speed,wow & flutter adj.)
VT724 or VTT724 (reference level)
VT738 or VTT736 (playback frequency response)
VT721 or VTT721 (output level)
VT703 or VTT703 (azimuth) (10kHz part only)
Equipment and measuring instruments
used for adujustment Power Spupply DC14.4V
(Reduced voltage ;10.5V)
Load 4
(4-speakers connection)
BASS / TRE,FADER Indication 0
Main volume Position with an output level
of 2V during VT721 playback
Condition for measurement
FM ; 400Hz,22.5kHz deviation (MONO)
FM STEREO ; 1kHz,6.5kHz deviation,
pilotsignal 7.5kHz,66dB V
AM ; 400Hz,30% modulation,74dB V
Output impedznce ; 50
Tuner section
Dummy antenna
Preset Memory Initialization
Preset Memory
Band M1
87.5
531
M2
89.9
603
M3
97.9
999
M4
105.9
1404
M5
108.0
1602
M6
87.5
531
FM(MHz)
AM(kHz)
For ver.U
Manual Tuning Up/Down Frequency
FM: 50kHz
AM: 9kHz
10 4.5
60
FM SSG 50
SSG Level
66dB
Coaxial Cable Plug to fit
antenna jack
FM DUMMY ANTENNA
AM DUMMY ANTENNA
Input Level
60dB
15pF
30
AM SSG 50
SSG Level
74dB
Coaxial Cable Plug to fit
antenna jack
Metal shield
must be attached to plug
60pF

KS-FX230
1-10
< Information for using a Car Stereo service jig (for adjustment and checking) >
For 1995 and 1996,we're advancing efforts to make our extension cords common for all Car Stereo products.
Please use this type of extension cord as follows.
As a U shape type top cover is employed,this type of extension cord is needed to check operation of the
mechanism assembly after disassembly.
Extension cords
Disassembly method (Refer to method to remove main parts)
Connection diagram
EXT KSRT002 18P (18 pin extension cord)
For connection between mechanism assembly and main
PCB assembly.
Check for mechanism-driving section such as motor, etc.
Remove the bottom cover.
Remove the front panel assembly.
Remove the top cover. (Remove the screws at each side of heat sink and rear panel.)
Install the front panel (whose assembly was removed in step 2) to the main unit.
Confirm that current is being carried by connecting an extension cord jig.
1.
2.
3.
4.
5.
Extension cord
Mechanism assembly
Front panel assembly
KS-FX230/KS-F130
Main board assembly Available to connect to the CN701 connector
when installing the front panel.

KS-FX230
1-11
Item Conditions Adjustment and Confirmation methods S.Values Adjust
Head
azimuth
adjustment
Head height adjustment
Adjust the azimuth directly. When you
adjust the height using a mirror tape,
remove the cassette housing from the
mechanism chassis. After installing the
cassette housing, perform the azimuth
adjustment.
Load the SCC-1659 mirror tape. Adjust with
height adjustment screw A and azimuth
adjustment screw B so that line A of the
mirror tape runs in the center between Lch
and Rch in the reverse play mode.
After switching from REV to FWD then to
REV, check that the head position set in
procedure 1 is not changed. (If the position
has shifted, adjust again and check.)
Adjust with azimuth adjustment screw B so
that line B of the mirror tape runs in the
center between Lch and Rch in the forward
play mode.
Test tape:
SCC-1659
VT703(10kHz)
Test tape: VTT712
(3kHz)
Test tape: VTT724
(1kHz)
VTT739
(63Hz / 1kHz / 10kHz)
1.
Tape speed
and wow
flutter
confirmation
2.
Play back
frequency
response
confiramation
3.
1.
2.
3.
Check to see if the reading of the F, counter /
wow flutter meter is within 3015 3045(FWD
/ REV), and less than 0.35% (JIS RMS).
In case of out of specification, adjust the
motor with a built-in volume resistor.
1.
2.
Play test tape VTT724, and set the volume
position at 2V.
Play test tape VTT739 and confirm.
1kHz / 10kHz: -1 3dB,
1kHz / 63Hz: 0 3dB,
When 10kHz is out of specification, it will be
necessary to read adjust the azimuth.
1.
2.
3.
Load VTT724 (VT724) (1kHz) and play it
back in the reverse play mode. Set the Rch
output level to max.
Load VTT703 (VT703) (10kHz) and play it
back in the forward play mode. Adjust the
Rch and Lch output levels to max, with
azimuth adjustment screw B. In this case,
the phase difference should be within 45 .
Engage the reverse mode and adjust the
output level to max, with azimuth
adjustment screw C.
(The phase difference should be 45 or
more.)
When switching between forward and
reverse modes, the difference between
channels should be within 3dB. (Between
FWD L and R, REV L and R.)
When VTT721 (VT721) (315Hz) is played
back, the level difference between channels
should be within 1.5dB.
1.
2.
3.
4.
5.
Head azimuth adjustment
Tape speed:
3015
3045Hz
Wow
flutter: less
than 0.35%
Speaker out
1kHz / 63Hz
: 0 3db
1kHz / 10kHz
: -1 3db
Built-in volume
resistor
The tuner section is of an adjustment-freedesign. In case the tuner is in trouble, replace the tuner pack.
A line
B line
Head shield
PBHead
FWD Adj B
REV Adj C HEIGHT Adj A
phase
(0 ) (45 )
Head shield
The head is at low position
during.
The head is at High position
during REV.
Output
level:
Maximum

KS-FX230
1-12
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
SDA
GND
OUTLR
OUTLF
TL
B2L
B1L
IVL
ILL
QSL
IDL
MUTE
ICL
IMD
IBL
IAL
SCL
VCC
OUTRR
OUTRF
TR
B2R
B1R
IVR
ILR
QSR
IDR
Vref
ICR
CAP
IBR
IAR
CD-CH
TAPE
TUNER
POWER
SUPPLY
SOURCE
SELECTOR
VOLUME 1
+20 to -31 dB
LOUDNESS
LEFT
BASS
LEFT
+15 dB
TREBLE
LEFT
+12 dB
BASS
RIGHT
+15 dB
TREBLE
RIGHT
+12 dB
MUTE
FUNCTION
ZERO CROSS
DETECTOR
VOLUME 2
0 to 55 dB
BALANCE
FENDER REAR
VOLUME 2
0 to 55 dB
BALANCE
FENDER FRONT
HC BUS
REC
VOLUME 2
0 to -55dB
BALANCE
FENDER FRONT
VOLUME 2
0 to -55dB
BALANCE
FENDER REAR
VOLUME 1
+20 to -31 dB
LOUDNESS
RIGHT
LOGIC
21
31
2
19
16
15
13
11
22
20
18
17
14
23 25 24 26 27 28
30
29
1
32
3
4
10 8 9 7 6 512
1.Pin layout
3.Pin functions
2.Block diagram
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin
No. Pin No.
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
SDA
GND
OUTLR
OUTLF
TL
B2L
B1L
IVL
ILL
QSL
IDL
MUTE
ICL
IMO
IBL
IAL
Serial data input/output.
Ground.
output left rear.
output left front.
Treble control capacitor left channel or
input from an external equalizer.
Bass control capacitor left channel or
output to an external equalizer.
Bass control capacitor left channel.
Input volume 1.left control part.
Input loudness.left control part.
Output source selector. left channel.
Not used
Not used
Input C left source.
Not used
Input B left source.
Input A left source.
I/O
-
O
O
I
-
-
I
I
O
-
-
I
-
I
I
Symbol I/O Symbol I/O
Input A right source.
Input B right source.
Electronic filtering for supply.
Input C right source.
Reference voltage (0.5Vcc)
Not used
Output source selector right channel.
Input loudness right channel.
Input volume 1.right control part.
Bass control capacitor right channel
Bass control capacitor right channel or
output to an external equalizer.
Treble control capacitor right channel or
input from an external equalizer.
Output right front.
Output right rear.
Supply voltage.
Serial clock input.
I
I
-
I
-
-
O
I
I
-
O
I
O
O
-
I
IAR
IBR
CAP
ICR
Vref
IDR
QSR
ILR
IVR
B1R
B2R
TR
OUTRF
OUTRR
Vcc
SCL
Functions Functions
TEA6320T-X (IC931) : E.volume
Descrption of major ICs

KS-FX230
1-13
1 to 16
48 to 33
49
64
32
17
1.Pin layout 2.Block diagram
PIN
No.
1 to 9
10 to 52
53 to 55
56
57
58
59
60
61
62
63
64
S10 to S52
COM1 to COM3
VDD
/INH
VSS
OSC
CE
CL
DI
NOT USED
Segment outputs that display data transferred from
serial data.
The frame frequency (fo) for the common driver output is
(fosc/384)Hz.
Power supply
Forcibly terns off the display.regardless of internal data.
Serial data can be input. whether this pin is high or low
NOT USED
To GND
Oscillator connection (for the common segment alternating
waveform)
Serial data transfer
pins.connected to a
microprocessor.
-
O
O
-
I
-
-
-
I
I
I
I
CE : Chip enable
CL : Sync.clock
DI :Transfer data
Symbol I/O Functions
3.Pin function
LC75823E(IC651):LCD driver
to to
COM1 COM2 COM3 S52 S51 S1
LATCH & DRIVER
SHIFT REGISTER
ADDRESS
DETECTOR
COMMON
DRIVER
CLOCK
GENERATOR
VDD1
VDD2
INH
OSC
DI CL CE VDD VSS

KS-FX230
1-14
25 to 40
80 to 65
1
24
64
41
to to
1. Pin layout
2. Pin function
LC72362N-9388 (IC701) : System control
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15~18
19~22
23~26
27~30
31
32
33~36
37~40
41~43
44
45~48
49~52
53,54
55,56
57~60
61,62
63~66
67
68
69
70
71
72
73
74
75
76
77,78
79
80
XIN
TEST2
PG3/SI0
PG2/SO0
PG1/SCK0
PG0
PF3/SI1
PF2/SO1
PF1/SCK1
PF0
PE3/SI2
PE2/SO2
PE1/SCK2
PE0
PD3~PD0
PC3~PC0
PB3~PB0
PA3~PA0
V DD
PQ0
PP3~PP0
PO3~PO0
PN3~PN1
PN0/BEEP
PM3~PM0
PL3~PL0
PK3, PK2
PK1/INT1, PK0/INT0
PJ3/DAC3~PJ0/DAC0
PI1/ADI5, PI0/ADI4
PH3/ADI3~PH0/ADI0
HOLD
SNS
LCTR
HCTR
EO3
SUBPD
V DD
AMIN
FMIN
V SS
EO2,EO1
TEST1
XOUT
Pin No. Symbol I/O
I
I/O
O
O
I
O
O
O
O
O
I/O
I/O
Function
4.5MHz crystal oscillator connections
LSI test pin.
General-purpose input/output and serial input/output shared ports.
Output only port.
Key source signal output only ports.
General-purpose input/output port.
Output only port.
Power supply connections.
General-purpose input-output/external interrupt shared port.
General-purpose output port/DAC shared output pins.
General-purpose input/output ports.
General-purpose output port/BEEP tone shared output pins.
Key return signal input only port, of which threshold voltage is designed to be
low.
O
O
O
O
O
O
I
I
2nd PLL charge pump output pin.
Sub-charge pump output pin.
Power supply connections.
AM VCO (local oscillator) input pin.
FM VCO (local oscillator) input pin.
Power supply connections.
Main charge pump output pins.
LSI test pin.
4.5MHz crystal oscillator connections
I
I
I
I
I
General-purpose output port/ADC shared input pins.
PLL control, CLOCK STOP mode control pin.
Voltage sense/general-purpose input pin shared port.
Universal counter/general-purpose input shared input port.
Universal counter (frequency, cycle measurement)/general-purpose input
shared input port.

KS-FX230
1-15
DIVIDER REFERENCE DIVIDER SELECTOR PHASE
DETECTOR E01
E02
SUBPD
SUB
C.P.
1/114, 1/124
PROGRAMMABLE DIVIDER
LATCH
SNSFF
V-DET
1/2 UNIVERSAL
COUNTER
(20bits)
UNLOCK
F/F
PHASE
DETECTOR EO3
PQ0
LATCH
LATCH
BUS
DRIV.
LATCH
BUS
DRIV.
LATCH
BUS
DRIV.
BEEP
LATCH
BUS
DRIV.
LATCH
BUS
DRIV.
LATCH
BUS
DRIV.
LATCH
BUS
DRIV.
BUS
DRIV.
INTERRUPT
BUS
DRIV.
MPX
PI1/ADI5
PI0/ADI4
PH3/ADI3
PH2/ADI2
PH1/ADI1
PH0/ADI0
LATCH
BUS
DRIV.
LATCH
BUS
DRIV.
LATCH
BUS
DRIV.
LATCH
BUS
DRIV.
LATCH
BUS
DRIV.
LATCH
BUS
DRIV.
BUS
DRIV.
SIO
RAM
512 4bits ADDRESS
DECODER
ROM
12K 16bits
BUS
DRIVER
INSTRU-
CTION
DECODER
ADDRESS DECODER
PROGRAM COUNTER
STACK
JUDGE
ALU
ADC
PP3
PP2
PP1
PP0
PO3
PO2
PO1
PO0
PN3
PN2
PN1
PN0/BEEP
PM3
PM2
PM1
PM0
PL3
PL2
PL1
PL0
PK3
PK2
PK1/INT1
PK0/INT0
PJ3
PJ2
PJ1
PJ0
MPX
1/16, 1/17
3.Block diagram
HOLD
TEST1
TEST2
PA0
PA1
PA2
PA3
PB0
PB1
PB2
BP3
PC0
PC1
PC2
PC3
PD0
PD1
PD2
PD3
PF0
SCK1/PF1
SO1/PF2
SI1/PF3
PF0
SCK1/PF1
SO1/PF2
SI1/PF3
PE0
SCK2/PE1
PO2/PE2
SI2/PE3
XIN
XOUT
FMIN
AMIN
SNS
VDD
VSS
HCTR
LCTR

KS-FX230
1-16
1A
1Y
2Y
3Y
4Y
1C
2A
2C
3A
3C
4A
4C
Input Output
CA
X
Y
ZL
LLH
HH H
11C
21A
31Y
42C
52A
62Y
7GND
Vcc
4C
4A
4Y
3C
3A
3Y
( TOP VIEW )
14
13
12
11
10
9
8
1.Pin arrangement 2. Pin function
3. Block diagram
HD74HC126P (IC751) : Changer control

KS-FX230
1-17
HA13158A (IC981) : Power amp
1. Pin layout
2. Block diagram
IN1
IN2
IN3
IN4
STBY
2
1
11
13
23
10
TAB
PROTECTOR (ASO
SURGE, TSD)
INPUTBUFFER1
INPUTBUFFER2
INPUTBUFFER3
INPUTBUFFER4
AMP1
AMP2
AMP3
AMP4
MUTE
PVCC1PVCC2
INVCC +
-
+
-
+
-
+
-
12 22
14 18 6
3
4
5
7
8
9
15
16
17
19
20
21
1 ~ 23

KS-FX230
1-18
NC TUNER FM/AM POWER 5V REMOTE VP NC 9V NC TUNER-9V GND
BA3918-V1 (IC781) : Regulator
1
2
3
4
5
6
7
8
9
10
11
12
NC
TUNER
FM/AM
POWER
5V
REMOTE
VP
NC
9V
NC
TUNER-9V
GND
Not used
Output selector of AM and ANT.
Output selector for AM or FM or both outputs is off.
Output selector of COM and AMP. Only VDD output is on at STAND BY.
Output level is 5.6v. Output current is 100mA(min). It is voltage supply
for micro computer.WheneverVcc terminal is connected, output always
keep running
Voltage which is about 1V lower than Vcc unit voltage. Output current is
500mA(min).Voltage supply for Remote Amp.
To be continued to BACK UP and ACC of car.
Not used
Output level is 8.7V. Output current is 150mA(min). It can be used for
system common power supply ; tone control, volume control, balance control,
equalize amplifier.
Not used
Output level is 8.7V. Output current is 250mA(min).Voltage supply for
FM Radio Tuner.
To GND
Pin
No. Symbol Functions
-
O
O
O
-
-
O
-
-
-
-
-
I/O
1.Block diagram
2.Pin functions
-
+
-
+
-
+
-
+
OIVPC
REGULATOR

KS-FX230
1-19
1 2 3 4 5 6 7 8 9 10
GNDOUT1 P1 VZ IN1 IN2 VCC1VCC2 P2 OUT2
Input Output Mode
IN1 IN2 OUT1 OUT2
Brake
0 0 0 0
1 0 1 0
0 1 0 1
1 1 0 0
CLOCKWISE
COUNTER-CLOCKWISE
Brake
LB1641 (IC501) : DC motor driver
1. Pin layout
2. Pin functions
1.Block diagram and pin configuration
CXA2509AQ(IC901):Cassette mecha controler

KS-FX230
1-20
<<MEMO>>