Sharp SD-EX220 (serv.man2) Service Manual ▷ View online
SD-EX220H
7 – 4
T
T
DOUT
Stopped
CH1=2 V
DC 10:1
500 ns/div
1999/04/07 09:25:28
(500 ns/div)
NORM:200 MS/s
1
=Record Length=
Smoothing : ON
CH1 :
0.00 V
CH2 :
0.00 V
Main :
1 K
Zoom :
100
Mode : NORMAL
Type : EDGE CH1
Delay :
Type : EDGE CH1
Delay :
2.887 ms
Hold off :
0.2
∝s
CH3 :
0.00 V
CH4 :
0.00 V
BW : FULL
=Trigger=
=Filter=
=Offset=
T
FDO
PDO2
PDO1
Stopped
CH1=500 mV
DC 10:1
CH3=1 V
DC 10:1
CH4=1 V
DC 10:1
500 ms/div
(500 ms/div)
NORM:20 kS/s
1
4
3
=Record Length=
Smoothing : ON
CH1 :
0.000 V
CH2 :
0.0 V
Main :
100 K
Zoom :
2 K
Mode : AUTO
Type : EDGE CH2
Delay :
Type : EDGE CH2
Delay :
0.0 ns
Hold off :
0.2
∝s
CH3 :
0.00 V
CH4 :
0.00 V
BW : FULL
=Trigger=
=Filter=
=Offset=
CH1
v/DIV
500 mV
500 mV
1999/04/05 17:33:17
Is pin 52 (C2F) on IC1 "L" ?
Yes
No
The HF waveform is normal and the time is displayed
normally, but no sound is produced. Or the sound
has dropouts.
normally, but no sound is produced. Or the sound
has dropouts.
2-5 Others.
There are too many error flags on a damaged disc which
makes error correction impossible.
makes error correction impossible.
Check again using a known good disc.
1. When playing at normal speed
Check the peripheral circuit at pin 39 (DOUT) on IC1 and
the waveform (Figure 7-4-2).
the waveform (Figure 7-4-2).
If OK, Check the unit.
When a disc is loaded, start play operation.
2-4 PLL system check.
The HF waveform is normal, but the TOC data cannot be
read.
read.
Check the PDO waveform. (Figure 7-4-1)
Check around pins 73~78 on IC1.
Figure 7-4-1
Figure 7-4-2
SD-EX220H
8 – 1
Audio
SD-EX220H
Service Manual
Market
E
CHAPTER 8.
OTHER
[1] Function table of IC
IC1 VHiLC78646E-1: CD Servo (LC78646E) (1/2)
In this unit, the terminal with asterisk mark (*) is (open) terminal whitch is not connected to the outside.
Pin No.
Terminal Name
Input/Output
Setting in Reset
Function
1
SLCO
Output
—
For slice level
control.
Control output.
2
SLCIST
Input
—
Resistor connection terminal for SLCO output current setting.
3
EFMIN
Input
—
RF signal input terminal.
4
RF
Output
—
RF signal monitor terminal.
5
RFVDD
Input
—
RF power terminal.
6
RFVSS
—
—
RF earth terminal. To be connected to 0 V.
7
FIN1
Input
—
A+C signal input terminal.
8
FIN2
Input
—
B+D signal input terminal.
9
TIN1
Input
—
E signal input terminal.
10
TIN2
Input
—
F signal input terminal.
11
VREF
Output
RFVDD/2
VREF voltage output terminal.
12
REF1
Input
—
Reference supply setting terminal.
13*
FE
Output
ZHI
FE signal monitor terminal.
14
TEC
Output
—
LPF capacitor connection terminal for TE signal.
15*
TE
Output
ZHI
TE signal monitor terminal.
16*
RFMON
Output
ZHI
RF internal signal monitor terminal.
17
JITTC
—
—
Capacitor connection terminal for jitter detection.
18
ADAVDD
Input
—
Power terminal for servo A/D, D/A.
19
ADAVSS
—
—
Earth terminal for serve A/D, D/A. To be connected to 0 V.
20
TDO
Output
ADAVDD/2
Output terminal for tracking control. D/A output.
21
FDO
Output
ADAVDD/2
Output terminal for focus control. D/A output.
22
SPDO
Output
ADAVDD/2
Output terminal for spindle control. D/A output.
23
SLDO
Output
ADAVDD/2
Output terminal for sled control. D/A output.
24*
GPDAC
Output
ADAVDD/2
Servo D/A general-purpose output terminal.
25
CONT4
Input/Output
Input Mode
General-purpose I/O terminal 4.
Controlled by commands from the micrcom-
puter.
When not used, set them as input terminals
and connect to 0 V, or set them as output
terminals and leave open.
puter.
When not used, set them as input terminals
and connect to 0 V, or set them as output
terminals and leave open.
26
CONT5
Input/Output
Input Mode
General-purpose I/O terminal 5.
27*
SBCK/CONT6
Input/Output
Input Mode
General-purpose I/O terminal 6 or
Subcode reading clock input ter-
minal.
Subcode reading clock input ter-
minal.
28
SBCK/FG
Input
—
Subcode reading clock input terminal/FG signal input terminal/external emphsis
setting terminal.
Terminal functions are set by commands.
When not used, conect to 0 V.
setting terminal.
Terminal functions are set by commands.
When not used, conect to 0 V.
29*
DEFECT
Output
L
Defect terminal.
30*
V/*P
Output
H
Auto switching monitor output terminal for rough servo phase control.
“H”: rough servo, “L”: phase servo.
“H”: rough servo, “L”: phase servo.
31*
FSEQ
Output
L
Sync signal detection output terminal.
The status changes to “H” when the sync signal detected in EFM and the sync
signal of internal generation are identified.
The status changes to “H” when the sync signal detected in EFM and the sync
signal of internal generation are identified.
32*
MONI1
Output
L
Internal signal monitor terminal 1.
33*
MONI2
Output
L
Internal signal monitor terminal 2.
34
DE_EMPH
Output
L
Internal signal monitor terminal 3.
35*
MONI4
Output
L
Internal signal monitor terminal 4.
36*
MONI5
Output
L
Internal signal monitor terminal 5.
37
VSS
—
—
Digital system earth terminal. To be connected to 0 V.
38
VDD
Input
—
Digital system power terminal.
39
DOUT
Output
L
Digital OUT output terminal. (EIAJ format)
40
TEST
Input
L
Input terminal for test. To be connected to 0 V.
41
LVDD
Input
—
Left channel
D/A converter
Power supply for Left channel.
42*
LCHO
Output
LVDD/2
Left channel output.
43
LVSS
—
—
GND for Left channel. Must be connected to 0 V.
44
RVSS
—
—
Right channel
D/A converter
D/A converter
GND for Right channel. Must be connected to 0 V.
45*
RCHO
Output
LVDD/2
Right channel output.
46
RVDD
Input
—
Power supply for Right channel.
47
XVDD
Input
—
Crystal
Oscillator
Power supply for crystal oscillator.
48
XOUT
Output
—
Connected for the 33.8688 MHz crystal oscillator cement.
49
XIN
Input
—
SD-EX220H
8 – 2
IC1 VHiLC78646E-1: CD Servo (LC78646E) (2/2)
In this unit, the terminal with asterisk mark (*) is (open) terminal whitch is not connected to the outside.
Be sure to supply the same potential to each power terminal. (VVDD, ADAVDD, VDD, LVDD, RVDD, XVDD)
Terminal witch is controlled by the power terminal (VDD5 V) for a microcomputer interface :
CE (61 pin), CL (62 pin), DI (63 pin), DO (64 pin), WRQ (65 pin), RES (66 pin), DRF (67 pin)
Pin No.
Terminal Name
Input/Output
Setting in Reset
Function
50
FSX/16MIN
Input/Output
Input
7.35 kHz Synchronization signal monitor port.
or Clock input port for Digital filter & D/A
or Clock input port for Digital filter & D/A
51
XVSS
—
—
Crystal
Oscillator
GND for crystal oscillator. Must be connected to 0 V.
52*
C2F
Output
H
C2 FLAG monitor port.
53*
EFLG
Output
L
C1, C2 error corrected monitor port.
54
16MOUT
Output
Clock
16.9344 MHz output port.
55
ASLRCK
Input
—
Anti-shock
Word clock input port.
(If this port does not use, must be connect to 0 V.)
(If this port does not use, must be connect to 0 V.)
56
ASDACK
Input
—
Bit clock input port.
(If this port does not use, must be connect to 0 V.)
(If this port does not use, must be connect to 0 V.)
57
ASDFIN
Input
—
Left/Right channel data input port.
(If this port does not use, must be connect to 0 V.)
(If this port does not use, must be connect to 0 V.)
58
LRCK
Output
L
Digital data
Word clock output port.
59
BCK
Output
L
Bit clock output port.
60
DATA
Output
L
Left/Right channel data output port.
61
CE
Input
—
Microcomputer
Interface
Chip enable signal input port.
62
CL
Input
—
Data transfer clock input port.
63
DI
Input
—
Data input port.
64
DO
Output
(H)
Data output port. (N-ch. open drain output.)
65
*WRQ
Output
H
Interruption signal output.
66
*RES
Input
—
Chip reset signal input port.
This port must be set LOW after first applied power on.
This port must be set LOW after first applied power on.
67
DRF
Output
L
Focus detection output port.
68
VDD5
Input
—
Focus detection output port.
69
VSS
—
—
GND for digital circuit. Must be connected to 0 V.
70
CONT3
Input/Output
Input
General purpose port 1.
Controlled with serial data command from micro-
computer. When not used, General purpose
input/output terminal 7.
Set it as the input terminal and open it by con-
necting to 0 V, or set it as the output terminal and
open it.
computer. When not used, General purpose
input/output terminal 7.
Set it as the input terminal and open it by con-
necting to 0 V, or set it as the output terminal and
open it.
71
CONT2
Input/Output
Input
General purpose port 2.
72
CONT1
Input/Output
Input
General purpose port 3.
73
PDO1
Output
—
PLL
Internal VCO control phase comparator output port 1.
74
PDO2
Output
Input
Internal VCO control phase comparator output port 2.
75
VVSS
—
—
GND for internal VCO. Must be connected to 0 V.
76
PCKIST
Input
—
PDO output current adjustment resistor connection port.
77
VVDD
Input
—
Power supply for internal VCO.
78
FR
Input
—
VCO frequency range adjustment port.
79
LDS
Input
—
LASER power detected signal input port.
80
LDD
Output
—
LASER power control signal output port.
SD-EX220H
8 – 3
IC1 VHiLC78646E-1: CD Servo (LC78646E)
1
2
3
3
4
5
5
6
7
7
8
9
9
10
11
11
12
13
13
14
15
15
16
17
18
18
19
20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61
60
59
58
58
57
56
56
55
54
54
53
52
52
51
50
50
49
48
48
47
46
46
45
44
43
43
42
41
SLCO
SLCIST
EFMIN
RF
RFVDD
RFVSS
FIN1
FIN2
TIN1
TIN2
VREF
REF1
FE
TEC
TE
RFMON
JITTC
ADAVDD
ADAVSS
TDO
FDO
SPDO
SLDO
GPDAC
CONT4
CONT5
SBCK/CONT6
SBCK/FG
DEFECT
V/*P
FSEQ
MONI1
MONI2
MONI3
MONI4
MONI5
(3.3V)VSS
VDD
DOUT
TEST
LDD
LDS
FR
VVDD
PCKIST
VVSS
PD02
PD01
CONT1
CONT2
CONT3
VSS
VDD5
DRF
*RES
*WRQ
DO
DI
CL
CE
DATA
BCK
LRCK
ASDFIN
ASDACK
ASLRCK
16MOUT
EFLG
C2F
XVSS
FSX/16MIN
XIN
XOUT
XVDD
RVDD
RCHO
RVSS
LVSS
LCHO
LVDD
LC78646E
+
Ð
+
Ð
+
Ð
+
Ð
Ð
Ð
+
+
MIX
LPF
LPF
LPF
TBAL
TBAL
RAM
LEVEL SET
AGC
EQ
SW
PH
BH
+
Ð
+
Ð
+
Ð
+
Ð
MONI
CONT
A/D
SERVO PROCESSOR
TRACK JUMP
AUTO ADJUST
JITTER
DETECT
1bit DAC
8FS
DIGITAL FILTER
GENERAL-PURPOSE
PORTS
COMMAND
INTERFACE
CLOCK
GENERATOR
CLV,CAV
CONTROL
PLL
VCEC
SLICE LEVEL
CONTROL
APC
S/H
D/A
SW
DRF
RUPTURE DEFECT
FRAME SYNC
DETECT,PROTECT INSERT,
EFN DECODE
VDD
SUBCODE DECODE CRC
MONITOR SIGNAL SELECTOR
RAM
ERROR
CORRECTION
AUDIO CD
AUDIO OUT
SERIAL
OUT
EXTERNAL
AUDIO IN
INTERPOLATION
MUTE
ATTENUATION
DEEMPHSIS
LPF
FIN1
FIN2
TIN1
TIN2
REF1
DETECT
ADIN
ADAVDD
ADAVSS
JITTC
SLCO
SLCO
EFMIN
SLCIST
PCK
PDO1
PDO2
FR
PCKIST
VVDD
VVSS
SBCK/FG
XIN
XOUT
16MOUT
XVDD
XVSS
*RES
*WRQ
CL
CE
DI
DO
VDD5V
CONT1, 2, 3
TEST
CONT4, 5
SBCK/CONT6
LVDD LVSS
LCHO
RCHO
RVDD RVSS
ASDFIN
ASDQCK
ASLRCK
DATA
BCK
LRCK
DOUT
EFLG
C2F
FSK/16MIN
MONI1~5
VSS
VDD
V/*P
FSEQ
DRF
GPDAC
SPD0
SLD0
TD0
FD0
LDS
LDD
VREF
RFMON
RFVSS
RFVDD
RF
TEC
TE
FE
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