- 20 -
Input
Interface
Timing
Control
Digital
Filter
Mode
Control
Noise
Shaper
5-Level DAC
Left
Low Pass Filter
Left
CMOS Amp
Left
5-Level DAC
Right
Low Pass Filter
Right
CMOS Amp
Right
1
2
3
4
6
8
10
12
5
7
9
11
13
14
LRCIN
DIN
BCKIN
CLKO
XTI
XTO
DGND
VDD
VCC2R
AGND2R
EXT1R
EXT2R
VOUTR
AGND1
28
27
26
25
23
21
19
17
24
22
20
18
16
15
ML/DSD
MC/DM2
MC/DM1
MUTE
MODE
CKSL
DGND
VDD
VCC2L
AGND2L
EXT1L
EXT2L
VOUTL
VCC1
MAIN BOARD
U302: PCM1710U
28
Clock
input
X
IN
X
CIN
Sub-
clock
input
X
COUT
Sub-
clock
output
ø
29
Clock
input
X
OUT
Clock generating
circuit
Data bus
CPU
ROM
RAM
LCD display
RAM
(16 bytes)
LCD
drive control
circuit
A
25
Reset input
RESET
71
(5V)
Vcc
(0V)
Vss
30
78
V
L3
77
COM
0
76
COM
1
75
COM
2
74
COM
3
70
SEG
0
69
SEG
1
68
SEG
2
67
SEG
3
66
SEG
4
65
SEG
5
64
SEG
6
63
SEG
7
62
SEG
8
61
SEG
9
60
SEG
10
59
SEG
11
79
V
L2
80
V
L1
54
53
52
51
50
49
48
47
I/O port P0
P0(8)
46
45
44
43
42
41
40
39
I/O port P1
P1(8)
38
37
36
35
34
33
32
31
I/O port P2
Input port P3
P2(8)
Ke
y-on w
ak
e up
Real time por
t function
ø
INT
0
, INT
1
INT
2
, INT
3
ADT
RTP
0
, RTP
1
CNTR
0
, CNTR
1
T
OUT
X
COUT
X
CIN
58
57
56
55
P3(4)
SI/O(8)
24
23
22
21
20
19
18
17
I/O port P4
P4(8)
16
15
14
13
12
11
10
9
I/O port P5
P5(8)
A-D converter(8)
8
7
6
5
4
3
2
1
I/O port P6
I/O port P7
V
REF
AV
SS
(0V)
P6(8)
27
26
P7(2)
73
72
Time X(16)
Time Y(16)
Time 1(8)
Time 2(8)
Time 3(8)
X
Y
S
PC
L
PC
H
PS
MAIN BOARD
U401: M38223E4HP4
Summary of Contents for C 521BEE
Page 1: ...NAD C 521BEE COMPACT DISC PLAYER C 521BEE COMPACT DISC PLAYER SERVICE MANUAL...
Page 12: ...12 PCB LAYOUT DISPLAY BOARD KEY BOARD LIVE BOARD LED BOARD...
Page 13: ...13 MAIN BOARD...
Page 30: ...30 EXPLODED VIEW M501...
Page 34: ...SERVICE MANUAL NAD 2003 C 521BEE COMPACT DISC PLAYER NAD ELECTRONICS INTERNATIONAL TORONTO...