Kenwood G-EQ300 Service Manual page 7

A B
DISPLAY PCB
1
W302
D312
11
SYSCON
2
D313
SYSCON 10 +4.8V
C316 10u50 R338
R IN 9
+ 10K
C317 10u50 R337
L IN 8
+
10K
MUTE 7
B
7311 DATA 6 95
D311 +4.7V
7311 CLK
5 96
D310
7311 ST 4 97
7305 CLK 3 98
7305 DI 2 99
S 1 100
81
V2/PL5
82
V1/PL4
83
3
COM0/PL0
84
COM1/PL1
85
COM2/PL2
86
COM3/PL3
87
( 87 ) P30
88
( 88 ) P31
89
VSS3
4.7V 90
+4.7V VDD3
91
P32(BACK UP)
92
( 92 ) P33
93
( 93 ) P34
R346 1K
94 P35
(8.16BIT SEL)
R331 560 95
P00
( 95 )
(7311 DATA)
R332 560
96 P01
( 96 )
(7311 CLK)
R333 560
97 P02
( 97 )
4 (7311 ST)
R334 560 98
P03
( 98 )
(7305 CLK)
R335 560
99 P04
( 99 )
(7305 DATA)
R336 560
100 P05
(
100 )
(7305
S)
R330
1K
C323
0.01
Q302
TAPE LED
CONTROL
5
ZD306 ZD304 ZD305
R345
27K
5.8V
14.9V -38.2V 5.4V
W301
Q393
B+ 4 +14.9V
R302
B- 3 -15.1V +5.6V
3.9K
A
AVR
GND 2
+
6.1V
-42V 1 -42V
W305
AC 1 1
-10.4V -5.3V
C
CENTER 2 R301 Q394
270
6
AC 3 3 -5.3V
1/4W
-15.1V
R303
-5.6V
AVR
3.9K
-6.1V
+ + +
+
7
C D
DISPLAY FILTER IC
IC303 IC305
4.8V
1 16 1
( 5 ) 4 VDD ( 1 ) OUT
2 15 2
( 7 ) 6 2 3 ( 2 ) OUT
3 14 3
COM 1 2 ( 3 ) OUT
4 13 4
7 0 1 ( 4 ) OUT
5 12 5
( 6 ) 5 3 4 ( 5 ) OUT
6 11 6
INH A 45 ( 6 ) OUT
7 10 7
VEE B 44 ( 7 ) OUT
8 9 8
VSS C 43 OUT
4.8V
42
D317
+
+4.8V
+4.8V
+4.7V
IC301
MAIN u-COM
H:4.3V R325
L:0V
1M
Q302
+4.7V +4.7V
R307
10K
-42V -42V
-41.3V
5.4V
+5.6V
-5.3V -5.3V
D301 4.7V
R311 R309
10K 10K
4.7V
+
+
+
R306 1.2K
4.7V
RESET
4.9V
IC306
C308 R310
D302 ZD303
1u50 10K
IN OUT
+
GND
Q301
RESET
13 12 11 10 9
CN303
D
E F
4.7V
DISPLAY FILTER IC
IC304
5.4V
D315
16 1 16
VDD ( 19 ) OUT VDD +5.6V
15 2 15
CLK/2 R341 ( 20 ) OUT CLK/2 R342
1.6K 2.2K
14 3 14
CLKR ( 21 ) OUT CLKR
13 4 13
CLKC ( 22 ) OUT CLKC
5
( 23 ) OUT
12 6 12
GND ( 24 ) OUT GND
11 7 11 R340 2.7K
L ( 25 ) OUT L
R339 2.7K
10 8 10
R OUT R
9 9
VSS VSS
( 26 )
C311
+5.6V +5.6V
C312
47u16
+
-5.3V
-5.3V -5.3V
+4.8V
ON:0V
OFF:4.6V
Q389
50
S20/PC4
49
S19/PC3
48
S18/PC2
47
S17/PC1 POWER LED
46
CONTROL
S16/PC0
R319 1K
45
S15/PB7 45
R320 1K
44
S14/PB6 44
43 R321 1K
S13/PB5 43
42 R322 1K
S12/PB4 42
R323 1K
41
(ENCODER IN)S11/PB3 41
40 R324 1K
(ENCODER IN)S10/PB2 40
39
SYSCON DATA S9/PB1
38
SYSCON SEND S8/PB0
37
S7/PA7 37
36
S6/PA6 36
35
S5/PA5 35
34
S4/PA4 34
33
S3/PA3 33
32
S2/PA2 32
31
S1/PA1 31
30
AR316
100Kx8
+5.6V
+4.8V
4.8V
37
36
35
34
33
32
31
8 7 6 5 4 3 2 1 1 2 3 4 5 6 7 8 9 10 11 12 13
CN304
E
G H
+4.7V
81
V2/PL5
82
V1/PL4
83
COM0/PL0
84
COM1/PL1
85
COM2/PL2
86
COM3/PL3
87
0.01 ( A18 ) P30
88
( A17 ) P31
89
VSS3
90 IC302
+5.6V VDD3
91
SUB u-COM
( A16 ) P32
92
( A15 P33
)
93
( A14 ) P34
94
( A1 ) P35
95
( A2 ) P00
96
( A3 ) P01
97
( A4 ) P02
98
( A5 ) P03
99
( A6 ) P04
100
( A7 ) P05
R343
1M
C332
0.01
+4.7V
( 6 )
-42V
AR315 100Kx6
Q318 Q319 Q320 Q321 Q322 Q323 Q324
+5.6V
+5.6V
-42V
AR313 100Kx6
Q304 Q312 Q311 Q313 Q308 Q309 Q310
5.4V Q334
+5.6V
C327 R356 5.4V
0.01 820
+
Q395
I J
+4.7V
50
S20/PC4 A45
49
S19/PC3 A44
48
S18/PC2 A43
47
S17/PC1 A42
46
S16/PC0 A41
45
S15/PB7
44
S14/PB6 A40
43
S13/PB5 A39
42
S12/PB4 A26
41
S11/PB3 A27
40
S10/PB2 A28
39
S9/PB1 A29
38
S8/PB0 A30
37
S7/PA7 A31
36
S6/PA6 A32
35
S5/PA5 A33
34
S4/PA4 A34
33
S3/PA3 A35
32
S2/PA2 A36
31
S1/PA1 A37
A38
4.7V
-42V
AR314 100Kx6
Q317 Q306 Q307 Q303
Q392
+5.6V
-42V -42V
AR312 100Kx6
Q305 Q316 Q314 Q315
+5.6V