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A B C D E

KDC-4022/422/6023
PC BOARD 1

(COMPONENT SIDE VIEW) (FOIL SIDE VIEW)
SWITCH UNIT X16-2020-10/12 (J74-1448-22) SWITCH UNIT X16-2020-10/12 (J74-1448-22)




D10
D11




ESD-GND
AM




FM
S24
KS4
X16-2020-10/12




C11
CP1 Ref. No address




C10
ILL +B R22
VOL A R25
IC1 4C




R23
D16
C9 VOL B IC2 6B 2
FLIP DET Q1 3C
RST




J1 Q2 5C
Q3 3C




1
RESET




2
KI3
Q4 3C




SRC
KS5




D12
D7
Q5 5C
ILL GND
D13 KS5
D14




C8
D15 DIMMER




R24




15
REMO KI2




16
ED1
D8
AUD




KI4
DO
PANEL 5V
CE
R6
KS3 CL R11 3
DI CP3 R19




R18
1




Q4 EB




R9
BE
D9 Q1




R16
R17
1




R15
69




R10 EB

D19 Q3
2




D-GND
KI1
D6
9




R29
R2
C2
C3
C4
C5
C6
KI4


R3 R4
R5
3




D5

R1
KI2 C1 4
1 100
4




D4
CP5


25 76
10




IC1
26 75
5




KI3
CP4
D1



KI1 50 51
6




D2
24




KI5
KI5
5
KS3
KS3
25




Q2 R28 R27
DISP




BE Q5 R21
D3 BE
R20
R13




R26
AUTO




W1
4 5 C12 C13
C7




IC2
D18 D17 3 1



DAUGHTER UNIT DAUGHTER UNIT
X89-2570-10 (J74-1450-02) X89-2570-10 (J74-1450-02)
S1 6
R2 C1
R1 D1
R3
R4
J1


1
2




CN1
18
17
R11 15
16
R6
R13
R7
R5
R12
R9
R10 2
7
1
R8




9
Refer to the schematic diagram for the values of resistors and capacitors.
7
6
5
4
3
2
1




10
ELECTRIC UNIT
F




X25-9800-11/12/21 (J74-1447-12)
C1




W33
W2 W3
W6
J1




W31
J3
J2 IC4 9 16 Q21




IC6
IC4
IC3
IC2
IC1
D257
13 11 12 8 4 3 2 2 24 8 1
E
W34
9 10 6 7 5 1 1 25 R22 L1




TH1
R357 R358 W4 D255 D251 D253
D23




R355
R356




4I
3I


4F
3H
2G
C351 C352 W5




R37


W7
W8
C21




R351
R352
R31
C256
D22 D1




X25-9800-11/12/21
D256 D258
W32

D252




Q31
Q22
Q21
D308




Q350
Q201
C301 C302 D301 C255




Q351 EB
D254




R261
R262
R259
R260




Q352 BE
D25 D24
G




W11
D309
R21




C31


W35/L2
D21




W26
C257




R23
D307 R257 R32
C258 E C
D303 R33 W28 B
KDC-4022/422/6023




1F


4H
3H

5G
1G
Q355 D311 D304 C20 E C
D31 W10 Q22




BE
R363 W1 R8
J4 R361R359 C303 C254 C251 C252 C253
1




D32




D270
D269
D271
1 R362 R360 D310 R9 IC3




R253
R254
C4
C22

W20
W24




Q356
Q355
Q354
Q352
Q351
R364 BE BE
D4




Q356
Q350 Q354 D205 D204 D3
3




R34
L3 EB
W29




CN6 D2 R1




Q358
C23




CN4 CN3
EB Q31
4




R376 BE
R2




C32
C354
W30




3




6H
6G