Onkyo DX-C34, Service Manual

Page: 30 / 66

DX-C34
IC BLOCK DIAGRAM/ TERMINAL DESCRIPTION
Q501 : LC78683E MP3 DECODER FOR CD
CD-DA shockproof
(Compressed or
uncompressed)
CDROM
decoder
MP3
decoder
M
U
X
Audio I/F
CPU-I/F
CKIN
VPRFR
VCOC
VPDO
CKOUT
IN
T
B
C
M
DOUT
CM
D
IN
CE
CL
M
D
A
T
A
[15:
0]
MA
D
R
S
[12:
0]
RAS
B
CA
S
U
B
CASL
B
OE
B
WE
B
LRSY
DATACK
DATAIN
C2FIN
SFSY
PW
SBSY
SBCK
RESB
ADLRCK
ADBCK
ADDATA
WOK
CNTOK
OVF
Data-I/F
FSYNC
CRCF
STREQ
STCK
STDAT
System
clock-
generator
VCO
PLL
DRAM-I/F
80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61
LC78683
(Top view)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
CKOUT
VSS
PW
SFSY
SBSY
AVDD
SBCK
ADDATA
LRSY
TEST2
ADBCK
C2FIN
ADLRCK
CKIN
TEST1
VCOC
VPRFR
DVDD1
VPDO
AVSS
DAT
A
CK
DATA
IN
RES
B
INT
B
CE CL CM
D
IN
C
M
DO
UT
OVF CN
T
O
K
WO
K
VS
S
DVDD6 CRC
F
FSY
NC
STDA
T
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
MADRS0
RASB
MADRS2
MADRS1
MADRS4
MADRS3
DVDD4
MADRS5
MADRS9
MADRS8
MADRS12
MADRS10
CASUB
OEB
WEB
CASLB
MADRS11
VSS
MADRS7
MADRS6
25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
M
D
ATA2
M
D
ATA3
MD
A
T
A4
MD
A
T
A5
MD
A
T
A8
VS
S
MD
A
T
A9
MD
ATA
1
0
MD
ATA
1
1
MD
A
T
A7
DVDD3
MD
A
T
A6
MD
ATA
1
3
MD
ATA
1
4
MD
A
T
A1
5
21 22 23 24
DVDD2
VS
S
MD
A
T
A0
MD
A
T
A1
ST
C
K
ST
R
E
Q
VS
S
DVDD5
MD
A
T
A1
2
PIN ASSIGNMENT
BLOCK DIAGRAM