JVC KS-FX201 User manual

SERVICE MANUAL
CASSETTE RECEIVER
No.49589
Jan. 2001
COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.
KS-FX201
KS-FX201
Area Suffix
U ---- Other Areas
Contents
Safety precaution
Disassembly method
Adjustment method
Description of major ICs
1-2
1-3
1-12
1-16
This service manual is printed on 100% recycled paper.

KS-FX201
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-FX201
1-3
Fig. 3
Disassembly Method
Detaching the Front Panel Unit
( See Fig.1 )
Push the Release button in the direction of arrow to
detach the front panel unit.
Removing the Front Chassis
( See Fig. 2 and 3 )
Disengage the four tabs ( a ) in the right and left sides of
unit and pull the front chassis forward to remove it.
Removing the Bottom Cover
( See Fig. 2 to 4 )
1. Removing the front chassis.
2. Turn the unit up side down.
3. Insert the four engagements ( b, c, d, e ) to the
screwdriver .
4. Turn the screwdriver and remove the bottom
cover.
Fig. 2
Fig. 4
Front panel unit
Fig. 1
Push the release button
Front chassis
Bottom cover
Top chassis
Bottom cover
a
a
bc
a
Front chassis d
Bottom cover
Rear panel
e

KS-FX201
1-4
Removing the Heat Sink ( See Fig. 5 )
1. Removing the front chassis.
2. Removing the bottom cover.
3. Remove the three screws ( 1 and 1' ) retaining the
heat sink.
Removing the Main Board Assembly
( See Fig. 5 to 7)
1. Removing the front chassis.
2. Removing the bottom cover.
3. Removing the heat sink.
Attach the heat sink with a screw ( 1' ) on operat-
ing checks.
4. Remove the two screws ( 2 ) retaining the main
board assembly.
5. Remove the six screws ( 3 ) and one screw ( 3' ) retaining
6. Separate the main board assembly and cassette
mechanism assembly.
7. Take out the main board assembly.
Fig. 5
Fig. 6
Fig. 7
( )
the rear panel.
Heat sink
11
1'
2
2
Main board assembly
Rear panel
333'
3

KS-FX201
1-5
Fig. 9
Fig. 11
Fig. 10
Removing the Cassette Mechanism assembly
( See Fig. 8 )
1. Removing the front chassis.
2. Removing the bottom cover.
3. Removing the heat sink.
4. Removing the main board assembly.
5. Remove the four screws ( 4 ) retaining the cassette
mechanism.
6. Separate the top chassis and cassette mechanism.
Fig. 8
Removing the Operation Switch board
( See Fig. 9 to 11)
1. Detaching the front panel unit.
2. Turn the front panel back side down.
3. Remove the four screws ( 5 ) retaining the front
cover.
4. Open the front cover gradually by disengaging the
three engagements ( g ) while pushing the top of
the front cover in the arrow "A" direction, then
disengage the three engagements ( h ) on the both
sides.
5. Place the front panel unit front side down.
6. Disengage the three engagements ( i ) on the
bottom to separate the front cover from the front
panel.
(Be careful not to lose the button springs.)
Front side
Cassette mechanism
Top chassis
44
44
gg
g
Front cover
A
5
5
5
5
h
h
h
Front cover
Front panel
iii
Operation switch board

KS-FX201
1-6
Fig. 14
Removing the Head Amplifier Board
( See Fig. 12 )
1. Removing the front chassis.
2. Removing the bottom cover.
3. Removing the heat sink.
4. Removing the main board assembly.
5. Removing the cassette mechanism.
6. Remove the screw ( 6 ) retaining the head ampli-
fier board.
7. Shift the two inter rocking sections ( j ) securing
the head amplifier board in the direction shown by
the arrow "B" to remove the printed circuit board.
8. From the connector CJ901 on the head amplifier
board from connector wire out going to the head
relay board.
Removing the Chassis Assembly
( See Fig. 13 and 14 )
1. Removing the front chassis.
2. Removing the bottom cover.
3. Removing the heat sink.
4. Removing the main board assembly.
5. Removing the cassette mechanism.
6. Removing the head amplifier board.
7. Turn the left side to cassette mechanism.
8. Remove the screw ( 7 ) retaining the relay board.
9. Shift the one inter rocking sections ( k ) securing
the relay board in the direction shown by the
arrow "C" to remove the printed circuit board.
10. Turn the back side down, remove the four screws
( 8 ) retaining the chassis assembly.
Fig. 12
Fig. 13
B
To head relay board
CJ901
Head amplifier board
j
j
6
Relay board
k
C
7
Chassis assembly
8
8
8
8

KS-FX201
1-7
Prior to performing the following procedures, remove
the head amplifier board, the relay board and the
mechanism bracket.
<Cassette mechanism assembly>
Unsolder the three wires aon the direction switch
board.
Remove the one screw Aattaching the direction
switch board.
1.
2.
Removing the direction switch board
(See Fig.1)
Remove the screw Battaching the FF / REW lever
assembly on the back of the cassette mechanism
assembly.
Remove the screw Con the upper side of the FF /
REW lever assembly.
Lift and pull forward the FF / REW lever assembly to
disengage the joints b, c, dand e.
1.
2.
3.
Removing the FF / REW lever assembly
(See Fig.1)
Reattach the FF / REW lever assembly to the joint c
on the back of the chassis.
Reattach the pinch-roller shaft e, the change lever d
and the return link eto the chassis.
1.
2.
Reattaching the FF / REW lever assembly
(See Fig.1)
C
FF / REW lever assembly
Joint c
Joint b
B
A
Direction switch board
Joint d
Joint e
Solding a
Fig.1

KS-FX201
1-8
Prior to performing the following procedure, remove
the direction switch board and the FF / REW lever
assembly.
Remove the screw Dattaching the playback head.
Remove the C washer and pull out the FF roller.
Remove the S support plate, the A arm spring (a)
and (b), the playback head.
1.
2.
3.
Removing the playback head (See Fig.2)
The A arm spring (a) differs from the A
arm spring (b).
ATTENTION:
Prior to performing the following procedure, remove
the direction switch board and the FF / REW lever
assembly.
Remove the P arm spring (f) in the pinch-roller (F)
assembly from the chassis.
Remove the P arm spring (r) in the pinch-roller (R)
assembly from the chassis.
Draw out the pinch roller (F) and (R) assembly from
the shaft.
1.
2.
3.
Removing the pinch-roller (R) and (F)
assembly (See Fig.2)
The P arm spring (f) differs from the P
arm spring (r).
ATTENTION:
The pinch roller (F) assembly differs
from the pinch roller (R) assembly.
ATTENTION:
A arm spring (b) A arm spring (a)
Pinch-roller (R) assembly Pinch-roller (F) assembly
Shaft Shaft
S support plate
D
C washer
P arm spring (f)
P arm spring (r)
Remove the P arm spring (f)
from the chassis.
Remove the P arm spring (r)
from the chassis.
Playback head
FF roller
Fig.2

KS-FX201
1-9
Prior to performing the following procedure, remove
the FF / REW lever assembly.
From the rear of the unit, bend the two tabs f
outwards and disengage the two joints gin the
direction of the arrow.
Push the eject lever and remove the cassette holder
from the playback head. Disengage the two joints h
of the cassette hanger / cassette holder and the eject
lever in the direction of the arrow.
Lift the cassette hanger / cassette holder and disengage
the joint iof the return link and the eject lever.
1.
2.
3.
Removing the cassette hanger / cassette
holder (See Fig.3)
Unsolder the two wires jon the motor assembly.
1.
Turn over the cassette mechanism assembly and
remove the main belt and the sub-belt from the
motor pulley.
2.
Remove the two screws Gattaching the motor
assembly.
3.
Removing the motor assembly
(See Fig.5)
To replace the sub-belt, remove the
main belt and the sub-belt from the
motor pulley. Then remove the three
screws Eand one screw F. Replace
with a new sub-belt while lifting the reel
base assembly slightly.
ATTENTION:
Prior to performing the following procedure, remove
the FF / REW lever assembly and the cassette
hanger / cassette holder.
Remove the C washer and pull out reel disc assembly.
1.
Removing the reel disc assembly
(See Fig.4)
Replace with a new C washer when
reattaching.
ATTENTION:
The main belt can now be removed.
ATTENTION:
Cassette holder
Cassette hanger
Return link
Joint i
Eject lever
Joint h
Joint h
Joint g
Joint g Tab f
Tab f
Reel disc assembly
Flywheel (BF)
Flywheel (BR)
E
E
E
F
G
G
Main-belt
Reel base assembly
Sub-belt
Motor assembly
Motor pulley
Solding j
Fig.3
Fig.4
Fig.5
C washer
C washer
Chassis

KS-FX201
1-10
Raise the part kof the reel base assembly slightly
and remove the selector link (B) on the front side of
the cassette mechanism assembly by turning it as
shown in Fig.10.
Remove the three screws Eand the one screw F
on the underside of the cassette mechanism
assembly.
1.
2.
Removing the reel base assembly
(See Fig.5 and 6)
Prior to performing the following procedure, remove
the cassette hanger / cassette holder.
From the upper side of the cassette mechanism
assembly, remove the C washer from each shaft of
the flywheel (BF) and (BR).
Turn over the cassette mechanism assembly and
remove the main belt. Pull out the flywheel (BF) and
(BR) downward respectively.
1.
2.
Removing the Flywheel (BF) and (BR)
assembly (See Fig.4 and 5)
The reel base assembly is not
repairable. Handle with care.
ATTENTION:
Selector link (B).
Inside of the reel base assembly
Reel disc assembly
Flywheel (BF)
Flywheel (BR)
E
E
E
F
G
G
Main-belt
Reel base assembly
Sub-belt
Motor assembly
Motor pulley
Solding j
Fig.4
Fig.5
Fig.6Fig.7
C washer
C washer
Pinch-roller (R) assembly
Turn the selector link (B).
k

KS-FX201
1-11
Unsolder the two wires lon the mute switch board on
the back of the cassette mechanism assembly.
Remove the screw Hattaching the mute switch
board.
1.
2.
Removing the mute switch board
(See Fig.8)
Prior to performing the following procedure, remove
the motor assembly.
Unsolder the two wires mon the power switch on the
side of the cassette mechanism assembly.
Remove the screw Iattaching the power switch.
1.
2.
Removing the power switch (See Fig.9)
Cassette mechanism assembly
Solding l
HMute
switch board
Solding m
IRower switch
Cassette mechanism assembly
Rower switch
Motor assembly
Fig.8
Fig.9

KS-FX201
1-12
Adjustment Method
Test Instruments reqired for adjustment
1. Digital osclloscope(100MHz)
2. Frequency Counter meter
3. Electric voltmeter
4. Wow & flutter meter
5.TestTapes
VT724.......................for DOLBY level measurement
VT739............For playback frequency measurement
VT712....For wow flutter & tape speed measurement
VT703..................... For head azimuth measurement
6.Torquegauge ....................Cassette type for CTG-N
(mechanism adjustment)
Measuring conditions(Amplifier section)
Power supply voltage.............. DC14.4V (10.5 - 16V)
Loadimpedance ........... 4 (2Speakers connection)
Line out............................................................ 20k
Standard volume position
Balance and Bass,Treble volume .Fader
:Center(Indication"0")
Loudness,Dolby NR,Sound,Cruise:Off
Volume position is about 2V at speaker output with
following conditions.Playback the test tape VT721.
AM mode 999kHz/62dB,INT/400Hz,30%
modulation signal on recieving.
FM mono mode 97.9MHz/66dB,INT/400Hz,22.5kHz
deviation pilot off mono
FM stereo mode 1kHz,67.5kHz dev. pilot7.5kHz dev.
Output level 0dB(1 V,50 /open terminal)
Frequency Band
MODEL KS-FX201
Band FM 87.5-108MHz 50KHz step
AM 531-1602KHz 9KHz step

KS-FX201
1-13
Playback head
Head azimuth screw
Fixed screw
Height adjusting screw c
Height adjusting screw b
Height adjusting screw a
Arrangement of Adjusting &Test points
Head section view
Cassette mechanism
(Surface)
Tape speed adjust
Motor assembly
Playback head
Azimuth screw

KS-FX201
1-14
Extension cord
: EXTKSRT002-6P
EXTKSRT002-6P
Front panel assembly
Main board
Cassette mechanism
Information for using a Car Audio Service Jig
1. For 1995 and 1996 , we're advancing efforts to make our extension cords common for all car audio products.
Please use this type of extension cord as follows.
2. 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.
3. Extension cord : EXTKSRT002-6P ( 6 pin extension cord ) For connection between mechanism assembly
and main board assembly.
Check for mechanism driving section such as motor ,etc..
Disassembly Method
1. Remove the bottom cover.
2. Remove the front panel assembly.
3. Remove the top cover .
4. Install the front panel.
5. Confirm that current is being carried by connecting
an extension cord jig.
Note
Available to connect to the CN701 connector when in-
stalling the front panel.

KS-FX201
1-15
Mechanism Adjustment Section
Item Adjusting & Confirmation Methods Adjust Std. Value
"Head Height Adjustment"
Note
Adjust the azimuth directly. When you adjust the height us-
ing a mirror tape, remove the cassette housing from the
mechanism chassis.
After installing the cassette housing, perform the azimuth
adjustment.
1.load the mirror tape ( SCC-1659 ). Adjust with height
adjustmentscrew (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.
2.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.
3.Adjust the azimuth screw (b) so that line "B" of the mirror
tape runs in the center between Lch and Rch in the forward
play mode.
"Head Azimuth Adjustment"
1.Load the test tape ( VT724: 1kHz ) and play it back in the
reverse play mode. set the Rch output level to maximum.
2.Load the test tape ( VT703: 10kHz ) and play it back in the
forward play mode. Adjust the Rch and Lch output levels
tomaximum, with azimuth adjustment screw (b).
In this case, the phase difference should be within 45 .
3.Engage the reverse mode and adjust the output level to
maximum, with azimuth adjustment screw (c).
*The phase difference should be 45_Kor more.
4.When switching between forward and reverse modes, the
difference between channels should be within 3dB.
*Between FWD Lch and Rch, REV Lch and Rch.
5.When the test tape ( VT721 : 315Hz ) is played back, the
level difference between channels should be within 1.5dB.
1.Check to see if the reading of the frequency counter & Wow
flutter meter is within 2940-3090 Hz( FWD/REV ), and less
than 0.35% ( JIS RMS ).
2.In case of out of specification, adjust the motor with a built-
in volume resistor.
1.Play the test tape ( VT724 : 1kHz ) back and set the volume
position at 2V.
2.Playthe test tape( VT739 )backand confirm 0+3dBat1kHz/
-
8kHz and -4+2dB at 1kHz/125Hz.
3.When 8kHz is out of specification, it will be necessary to
read adjust the azimuth.
Head shield
Head shield
The head is at low position
during FWD.
The head is at height position
during REV.
A Line
B Line
Phase
screw (c) screw (a)
screw (b)
Head azimuth
screw Fixed screw
045
Built-in
volumeresistor Tape Speed
2940-3090Hz
Wow&Flutter
Less than
0.35%
(JIS RMS)
Speaker out
1kHz/8kHz
: 0dB_}3dB,
125Hz/1kHz
: -4dB+2dB,
1.Head azimuth
2.TapeSpeedand
Wow & Flutter
3.Playback
Frequency
response

KS-FX201
1-16
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-FX201
1-17
AN80T05LF (IC781) : Regulator
1.Terminal layout & Block diagram
2.Pin function
Pre
Drive
Thermal
Protection
Reference Voltage
Pre
Drive AMP
Out
ASO & Peak
Current Protection
AMP
Out
Pre
Drive Pre Drive Pre
Drive
1 2 3 4 5 6 7 8 9 10 11 12
ILL
10V MODE2 MODE1 STB VDD 5.6V AMP VCC ANT COM 8.7V AM 8.7V FM 8.7V GND
1
2
3
4
5
6
7
8
9
10
11
12
ILL
MODE2
MODE1
STB
VDD
AMP
VCC
ANT
COM
AM
FM
GND
10V power supply for illumination.
When 5V is input,becomes AM. and the antenna output is turned on.
When 5V is input,becomes AM. and the output of FM is switched.
When 5V is input, outputs to ILL,COM,and AMP. It is 0V usually.
5.6V power supply.
Power supply supply to remote amplifier
Back up. connects with ACC with it.
Power supply supply to auto antenna.
8.7V power supply.
The power supply of 8.7V to AM.
The power supply of 8.7V to FM.
Ground
Pin
No.
Symbol Function

KS-FX201
1-18
25 to 40
80 to 65
1
24
64
41
to to
1. Pin layout
2. Pin function
LC72362N-9920 (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-FX201
1-19
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
LC72362N-9920

KS-FX201
1-20
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