Kenwood AR-304 Service Manual page 14

AJ AK AL
DISPLAY UNIT (X09-6XXX-XX) (B/8)
Q Q
ED51
3 7 6 3 1 5 1 5 0
10G 9G 8G 7G
1 P2 P3
P1 P4 P15 P15 P15
SP. A B MUTE TA NEWS TP
P5
P6 P7
R D S EON FM
P8
TI.VOL AM
P11
P9
S.DIRECT MW
P12
P10
TAPE2/MONI LW
P13
2
-25.3V
+B +B
81
CURRENT
3
4.9V BUFFER
Q501
-28.0V R516
2
80
-28.0V 1K
79
78
77
76
D507 75
77
( )
74
D522
78
( )
D510
76 T E
( ) L 1 3 9 4 2 2 9 6 5 1 3
D504
D503
1.9V D505
4
1.8V W72
R585
Q502
330
MEMORY BALANCE MUTE
2.3V
D513
S515 S514 S507
74
AUTO SOUND MONITOR
D512
S510 S502 S506
75
BASS R505 10K
BAND S.DIRECT BOOST
R506 10K
R507 10K
D520
S504 S503 S509 R508 4.7K
81
5
P.CALL
R510 4.7K
or
DIMMER
TA/
or
NEWS
PTY SP.B
D521
S513 S505 S501
80
P.CALL
or
(RDS)
DISPLAY
SP.A
D519
S511 S512
79
6 30V 30V
w w w
X09-A/8
-CN8
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11
2/3
CN9
7
B
AM AN AO
KRF-A4020E (X09-6142-70)
DESTINATION
6G 5G 4G 3G 2G 1G COUNTRY
EUROPE
P15 P15
P11
PTY MEMO
P15 STEREO
col KRF-A4020W (X09-6143-81)
TUNED DESTINATION
P12
COUNTRY
AUTO
P13
RUSSIA
MHz
P14
KRF-A4020 (X09-614X-XX)
P16
kHz DESTINATION
P15
Dp
COUNTRY
GENERAL MARKET
AUSTRALIA
U.K.
EUROPE
-25.3V
35
+B
+B
-17.5V
1 -28.0V
G9
2
G10
3
NC +B
-17.5V 80
P5/KS1 4 4.6V
-30.5V 79 RDS CLK 4
P4/KS2 5 4.6V
-30.5V 78 RDS DATA 5
P3/KS3 6
-27.0V 77 NC +B
P2/KS4 7 0V
76 (VOL) ENC1 CW1
-14.1V
P1/KS5 8
4.8V
REM IN
-24.1V 75
KS6
9 0V
(VOL) ENC1 CCW1
-18.9V 74
KS7
73
10
S.W MUTE
NC
0V 72
11
LIMITTER
NC
71
12 R542 470
0V
KR0
70
R543 470
13 1.0V
KR1
69
IC51
14 0V R544 470
KR2
68
u-COM 15 0V
PROTECTION
67
(BOTTOM VIEW) 16 0V
S DATA
66
17 0V
S BUSY
STANDBY: 3.9V 65
STANDBY
4.6V 64
18 4.8V
64 POWER
E2 DATA
63
19
E2 CLK
62 SP.B: 4.6V
61 20
4.8V
61 RELAY B (SEL) ENC2 CW2
60 21 4.8V
60 RELAY A CCW2
59 22 4.8V
(MLT) ENC3 CW3
SP.A: 4.6V
58 23 4.8V
CCW3
57 24
8/16
0V 56 25 0V XS8: 0.4V
VOL STB SL16: 4.9V
0V 55 26 4.8V
VOL CLK
4.6V 54 27 4.5V
VOL DT
2.7V 53 28
10dB ATT AV REF
52 29
S LEVEL
51 30
CP1
A MUTE
10K 6
MUTE
ON: 4.3V
OFF: -2.3V
ON: 2.0V
OFF: 4.6V
C502
50 0.01
R169
49
1M
4.6V
48
47
R556 10K
46
X501
8MHz
+B +B
30V 30V
W160
-31.0V
W28
x a o
+5.6V
. i
5.5V
10 9 8 7 6 5 4 3 2 1
AP AQ AR
R503,504, C503,521, C529,530, W28, W72,114, D503, D505,
UNIT No. A
R509 S505 S511 S513 Q502 IC51
ABB. 556,583 533,534 535-537 145 115,160 504,507 510
(RDS) TA/
E1 2-70 YES NO YES YES NO YES NO PTY NO YES NO CXP82840-163Q
DISPLAY NEWS
R503,504, C503,521,530, C529, W28, W72,114, D503, D504,
UNIT No. A R509 S505 S511 S513 Q502 IC51
ABB. 556,583 533,534,536,537 535 145 115,160 505 507,510
(RDS) TA/
Q 3-81 YES NO YES YES NO YES NO PTY NO YES NO CXP82840-163Q
DISPLAY NEWS
R503, R504, C503 C530, W28, W114,
UNIT No. A R509 C529 C534 W72 S505 S511 S513 D503 D504 D505
556 583 521,533 535-537 145 115,160
ABB.
M 0-21 YES YES P.CALL P.CALL YES NO
NO YES NO NO YES NO YES DIMMER NO
X 0-71 YES
NO YES
T 0-51 NO NO (RDS) TA/ NO
YES NO YES YES NO YES NO PTY NO YES
DISPLAY NEWS
E 2-70
+B +B
+B
WH52
1
2
3
4
CP2
10K 3
+B A501
R541
100 1
ROUT
2
GND
4.8V
3
VCC
+B R563
220
20
REMOTE
R558
220 21
S516
+5.6V
Q Q
3 7
4
A
IC52
5 4 C516 2.2u50
SDA VSS
L501
6 3
SCL A2 1uH
C506
7 2
CPE A1
20 1000P 8 1
+B VCC A0
21
4.9V
22
E2PROM
4.9V
23
+B +B
R547 100K
4.8V
D511 D523
R549 330
15
D509
R550 100K
16
D517
R551
330
+5.6V
4.6V
+B +B +B
+B
C534
0.047F
RESET IC
+ 5.5
+ 4.6V
5.1V
C535
5.1V
IC53 470u6.3
Q503
C517
1u50 + R574
IN OUT
6
C503 + +
GND 1K
1000P
RESET
D518 R537
+B
1 D526
C536 C537
100P 100P
R107
390 2W
R108
390 2W
u 1 6 3
+5.6V +5.6V
y
1
35
AS AT AU
AR-304 (X09-6310-10)
8 9 2 4
DESTINATION R503, R504, C503,521, C529, W28, W114, D503-505,
UNIT No.
A S505 S511 S513
COUNTRY ABB. 556 509,583 530,533,534 535-537 72,145 115,160 507,510
U.S.A. K P.CALL P.CALL
0-10 NO YES NO NO YES NO YES DIMMER NO
CANADA P
KRF-A4020 (X09-631X-XX)
DESTINATION R503,504, C503,521, C529,530, W28, W72,114, D503, D505,
UNIT No. A R509 S505 S511 S513
COUNTRY ABB. 556,583 533,534 535-537 145 115,160 504,507 510
U.K. T 0-51 (RDS) TA/
YES NO YES YES NO YES NO PTY NO YES
EUROPE E 2-71 DISPLAY NEWS
D507 D510 Q502 IC51
2SA1123
YES
2SA992
CXP82832-162Q
(P1)
NO YES
(P3) 2SC1845
NO a
CXP82840-163Q
2SC2631
(P2) (P4)
2SC3940A
(P6) (P5)
f h j b
k
g m
(P8) (P7)
e r p n c (P9)
(P10)
(X09- ) (C/8)
S508 (P11) (P13)
1
(P12)
d
2 (P14)
3 (9G-2G)
POWER
I / 2SC4081
D527 ON/STANDBY
4
2SD1757K
DIGITAL LINE
STANDBY SIGNAL LINE
GND LINE
+B B LINE
B B LINE
R561 R562
220 220
22
R559 R560
220 220
23
S517 S518
IC51 :
IC52 : X24C02 DA204U
6 3 1 5 1 IC53 5 0 : S-806D-Z 8
IC54 : SAA6579/R
IC54
RDS Q501,503 : 2SC1740S(Q,R) or
DEMODULATOR
2SC2785(F,E)
16 2.4V R578 220
RDCL Q502 : 2SA933AS(Q,R) or
R569 47K 1
QUAL 15
2SA1309A(Q,R)
R564 220 T57 R580 C527
2
RDDA 14 2.4V 2.2K 47P
OSCO
2.4V 3
D503-505,507-513,515-524,
VREF X502
+
C510 4.332MHz 528-530 : HSS104A or
330P C528
4 1SS133
MUX 13 2.4V 18P
OSCI
5 D526 : MTZJ5.1(B) or
12 C524
+B VDDA
VDD0 +B RD5.1ES(B2)
6
11 0.01
VSSA
VSSD D527 : B30-2513-05
UN4212
2.4V 7 10
CIN TEST
+ C515 2SA1309A
8 9
SCOUT MODE
L502 560P
2.4V
10uH
+B
CAUTION: For continued safety, replace safety critical components only with manufactur-
er's recommended parts (refer to parts list).
tinued protection against risk of fire, replace only with same type and rating fuse(s). To
reduce the risk of electric shock, leakage-current or resistance measurements shall be car-
ried out (exposed parts are acceptably insulated from the supply circuit) before the appli-
ance is returned to the customer.
The DC voltage is an actual reading measured with a high impedance type voltmeter with no
signal input. The measurement value may vary depending on the measuring instruments
(X09- ) (G/8)
used or on the product.
WH51 CN10 HEADPHONE
HP. L J7 m
1 1
HP. R
2 2
c o
GND
3 3
P3
. E1
AR-304(K,P) (3/3)
KRF-A4020(M,X,T,E) (3/3)
KRF-A4020E(E) (3/3)
KRF-A4020W(Q) (3/3) Y05-3880-13
AV AW AX
9 8 2 9 9
Q502 IC51
NO CXP82832-162Q
Q502 IC51
NO CXP82840-163Q
2SA1175 DTC124ESA 2SA1586
2SC2785 2SC1740S 2SC4116
2SD1819A
TRAITR3N X24C02 SAA6579/R
TRAITR3P
LC72131 NJM4565L-D LA1837
9 2 4 9 8 2 9 9
LA1838
NJM4580L-D
indicates safety critical components. For con-
AR-304/KRF-A4020