Read Sharp CD-CH1500 (serv.man8) Service Manual online
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CD-CH1500H/CD-CH1500W
IC2 VHiTC9490F/-1: Servo/Signal Control (TC9490F) (2/2)
39
AVDD3
Input
Analog 3.3 V power supply terminal.
40
FMO
Output
Feed equalizer output terminal.
41
DMO
Output
Disc equalizer output terminal.
42
DVSS
—
Digital GND terminal.
43
DVDD
Input
Digital 3.3 V power supply terminal.
44
TESIN
Input
Test input terminal. Usually "L" fixed.
45
XVSS
—
GND terminal for system clock oscillation circuit.
46
XI
Input
System clock oscillation circuit input terminal.
47
XO
Output
System clock oscillation circuit output terminal.
48
XVDD
Input
3.3 V power supply terminal for system clock oscillation circuit.
49
DVSS
—
GND terminal for D/A converter.
50
RO
Output
R channel data normal rotation output terminal.
51
DVDD
Input
3.3 V power supply terminal for D/A converter.
52
DVR
—
Reference voltage terminal.
53
LO
Output
L channel data normal rotation output terminal.
54
DVSS
—
D/A converter section GND terminal.
55*
ZDET
Output
1-bit D/A converter 0 detection flag output terminal.
56
VSS
—
GND terminal for microcomputer interface.
57-60
BUS0-BUS3
Input/Output
Data input/output terminal for microcomputer interface.
61
BUCK
Input
Clock input terminal for microcomputer interface.
62
/CCE
Input
Chip enable signal input terminal for microcomputer interface.
In case of "L", BUS3-0 are active.
In case of "L", BUS3-0 are active.
63
/RST
Input
Reset signal input terminal. Reset: "L".
64
VDD
Input
5 V power supply terminal for microcomputer interface.
Pin No.
Terminal Name
Function
Input/Output
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
Note:
AI/F: Analog input/output terminal
3-5I/F: Terminal with a built-in 3-5 interface (5 V system input/output terminal)
3I/F: 3 V system input/output terminal
Note:
AI/F: Analog input/output terminal
3-5I/F: Terminal with a built-in 3-5 interface (5 V system input/output terminal)
3I/F: 3 V system input/output terminal
Figure 51 BLOCK DIAGRAM OF IC
XVDD
XO
XI
XVSS
TESIN
DVDD
DVSS
DMO
FMO
AVDD3
SEL
TEBC
RFGC
VREF
TRO
FOO
TEZI
TEI
SBAD
FEI
RFRP
RFZI
RFCT
AVDD
RFI
SLCO
AVSS
VCOF
PVREF
LPFO
LPFN
TMAX
PDD
PVDD
/HSO
/UHSO
SBSY
SFSY
DATA
CLCK
SBOK
DVSS
DVDD
IPF
DOUT
AOUT
LRCK
BCK
DVSS
RO
DVDD
DVR
LO
DVSS
ZDET
VSS
BUS1
BUS2
BUS3
BUCK
/CCE
/RST
VDD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
LPF
1-bit
DAC
PWM
D/A
A/D
VCO
ROM
RAM
16K RAM
PLL
TMAX
+
+
+
+
BUS0
Clock
generator
Servo control
Digital equalizer
adjustment circuit
Data
slicer
CLV
servo
Synchronizing
signal guarantee
EFM demodulation
Sub-code
demodulation
circuit
Address
circuit
Correction
circuit
Digital
out
Audio output
circuit
Microcomputer
interface
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