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– 45 –

Is pin 35 (C2F) on IC2 "L"?

Yes

No

There are too many error flags on a damaged disc which
makes error correction impossible.

Check again using a known good disc.

1. When playing at normal speed

Check the peripheral circuit at pin 37 (DOUT) on IC2 and
the waveform (Figure 45-2).

If OK, check the unit.

When a disc is loaded, start play operation.

The HF waveform is normal, but the TOC data cannot be
read.

Check the PDO waveform. (Figure 45-1)

Check around pins 1~6 on IC2.

FDO

PDO2

PDO1

Stopped

µ

DOUT

Stopped

µ

– 46 –

REF

LA9235M

REF

REF

REF

REF

REF

REF

REF

REF

AGCON

ODRV

AGCON

ODRV

REF

REF

LPF

LPF

APC

ODRV

REF

REF

REF

REF

LPF

PH/BH

PH

BH

1

30

FIN1

VCC

2

29

FIN2

RFSW

3

TIN1

4

27

TIN2

RF

26 NC

25 PH

24 BH

23 NC

5

REF1

15

16

TESI

14

TESTO

13

EFBL

12

AGON

11

ODRV

10

LDOF

9

GND

8

LDD

7

LDS

6

VREF

TEST

17 HFL

18 TE

19 TE-

20 FE

21 FE-

22 RFEV

28 RF-

1

PDO1

2

PDO2

3

VVSS

4

PCKIST

5

VVDD

6

FR

7

HFL

8

SLCIST

9

SLCO

10

EFMIN

11

JITTV

12

JITTC

13

BH

14

PH(RFENV)

15

FE

16

TE

25

SPDO

26

SLDO

27

FG

28

LASER

29

CONT1

30

CONT2

CONT3

CONT4

CONT5

31

32

33

34

PCK

35

C2F

36

VDD

37

DOUT

38

FSX

39

EFLG

40

TEST

EFMO

DEFECT

FSEQ

V/P

CONT7

CONT6

VSS

VDD 5V

DEF

RES

WRQ

INT

DO

DI

CL

CE

17

VREF

18

ADAVDD

19

ADAVSS

20

PHREF

21

BHREF

22

TBLO

23

TDO

24

FDO

SBCK

PW

SBSY

SFSY

16M

DATA

DATACK

LRSY

ASDACK

ASLRCK

ASDFIN

XVSS

XOUT

XIN

XVDD

RVDD

RCHO

RVSS

LVSS

LCHO

LVDD

MUTER

MUTEL

EMPH

80

79

78

77

76

75

74

73

72

71

70

69

68

67

66

65

64

63

62

61

61

59

58

57

56

55

54

53

52

51

50

49

48

47

46

45

44

43

42

41

LC78641E

– 47 –

1

PDO1

Output

–

For PULL

Phase-comparison output terminal for built-in VOC control.

2

PDO2

Output

–

Phase-comparison output terminal for built-in VOC control.
Rough servo : OFF, phase servo : ON.

3

VVSS

–

–

Ground terminal for built-in VCO.

4

PCKIST

AI

–

Resistor terminal for setting  the PDO output current.

5

VVDD

–

–

Power terminal for built-in VCO.

6

FR

AI

–

Resistor terminal for setting  the VCO frequency range.

7

HFL

Input

–

Mirror detection signal input terminal.

8

SLCIST

AI

–

For slice level control

Resistance connection terminal for current adjustment of
SLCO output.

9

SLCO

Output

–

Control output.

10

EFMIN

Input

–

EFM signal input terminal.

11*

JITTV

Output

Unfixed

Jitter detection/monitor terminal.

12

JITTC

Output

–

Jitter detection/adjustment terminal.

13

BH

Input

–

BH signal input terminal. A/D input.

14

PH(RFENV)

Input

–

PH signal or RFENV signal input terminal. A/D input.

15

FE

Input

–

FE signal input terminal. A/D input.

16

TE

Input

–

TE signal input terminal. A/D input.

17

VREF

Input

–

VREF signal input terminal. A/D input.

18

ADAVDD

–

–

AD for servo, D/A power terminal.

19

ADAVSS

–

–

AD for servo, D/A ground terminal.

20*

PHREF

Output

(1/2VDD)

PH reference output terminal. D/A output.

21*

BHREF

Output

(1/2VDD)

BH reference output terminal. D/A output.

22

TBLO

Output

(1/2VDD)

Output terminal for tracking balance. D/A output.

23

TDO

Output

(1/2VDD)

Output terminal for tracking control. D/A output.

24

FDO

Output

(1/2VDD)

Output terminal for focus control. D/A output.

25

SPDO

Output

(1/2VDD)

Output terminal for spindle control. D/A output.

26

SLDO

Output

(1/2VDD)

Output terminal for sled control. D/A output.

27*

FG

Input

–

FG signal input terminal. (When not used,connect to 0V)

28

LASER

Output

L

LASER ON/OFF control terminal.

29

CONT1

In/Output

Input mode

General purpose input/output terminal 1.

Controlled with serial data command

30

CONT2

In/Output

Input mode

General purpose input/output terminal 2.

from microcomputer. When not used,

31

CONT3

In/Output

Input mode

General purpose input/output terminal 3.

set it as the input terminal and

32

CONT4

In/Output

Input mode

General purpose input/output terminal 4.

open it by connecting to 0V, or set it

33

CONT5

In/Output

Input mode

General purpose input/output terminal 5.

as the output terminal and open it.

34*

PCK

Output

H

Clock monitor terminal for EFM data replay. 4.3218MHz as phase clock.

35*

C2F

Output

H

C2 flag output terminal.

36

VDD

–

–

Power terminal of digital system.

37

DOUT

Output

L

Output terminal of digital OUT. (EIAJ format)

38*

FSX

Output

L

Output terminal of synchronous signal of 7.35kHz divided from quartz oscillation.

39*

EFLG

Output

L

C1,C2 correct monitor terminal.

40

TEST

Input

–

Input terminal for test. Surely connected to 0V.

41*

EMPH

In/Output

Input mode

Emphasis terminal. After resetting, it is configured as an input terminal. It can be controlled
from the outside. It is also becomes a emphasis monitor terminal under command control.

42*

MUTEL

Output

H

Mute output terminal for L channel.

43*

MUTER

Output

H

Mute output terminal for R channel.

In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.

– 48 –

44

LVDD

–

–

L channel

Power terminal for L channel.

45

LCHO

Output

1/2VDD

D/A converter

L channel output terminal.

46

LVSS

–

–

Ground terminal for L channel. Surely connected to 0V.

47

RVSS

–

–

R channel

Ground terminal for R channel. Surely connected to 0V.

48

RCHO

Output

1/2VDD

D/A converter

R channel output terminal.

49

RVDD

–

–

Power terminal for R channel.

50

XVDD

–

–

For quartz

Power terminal for quartz oscillation.

51

XIN

Input

Oscillation

oscillation

Ground terminal of 16.9344MHz quartz oscillation.

52

XOUT

Output

Oscillation

53

XVSS

–

–

Ground terminal for quartz oscillation. Surely connected to 0V.

54

ASLRCK

Input

–

For anti

L/R clock input terminal. (When not used,connect to 0V)

55

ASDACK

Input

–

shock mode

Bit clock input terminal. (When not used,connect to 0V)

56

ASDFIN

Input

–

L/R channel data input terminal. (When not used,connect to 0V)

57*

LRSY

Output

L

For digital

L/R clock output terminal.

58*

DATACK

Output

L

data output

Bit clock output terminal.

59*

DATA

Output

L

L/R channel data output terminal.

60*

16M

Output

Clock output

16.9344MHz output terminal.

61*

SFSY

Output

L

Output terminal of synchronous signal of subcode frame.
It drops when subcode stand by.

62*

SBSY

Output

L

Output terminal of synchronous signal of subcode block.

63*

PW

Output

L

Output terminal of subcodes P,A,R,S,T,U and W.

64

SBCK

Input

–

Clock input terminal to read subcode. (When not used,connect to 0V)

65

CE

Input

–

For

Chip enable signal input terminal.

66

CL

Input

–

microcomputer

Data transmission clock input terminal.

67

DI

Input

–

interface

Data input terminal.

68

DO

Output

L

Data output terminal.

69

INT

Output

H

Interruption signal output terminal.

70

WRQ

Output

H

Interruption signal output terminal.

71

RES

Input

–

Reset input terminal of LC78640. When turning on power, set it at "L".

72

DRF

Output

L

Focus ON detection terminal.

73

VDD5V

–

–

Power terminal for microcomputer interface.

74

VSS

–

–

Ground terminal of digital system. Surely connected to 0V.

75

CONT6

In/Output

Input mode

General purpose input/output terminal 6.

Controlled with serial data command
from microcomputer. When not used,

76

CONT7

In/Output

Input mode

General purpose input/output terminal 7.

set it as the input terminal and
open it by connecting to 0V, or set it
as the output terminal and open it.

77*

V/ *P

Output

H

Monitor output terminal for automatic switch of rough servo/phase control.
"H" for rough servo, and "L" for phase servo.

78*

FSEQ

Output

L

Output terminal synchronous signal detection. "H" is output when synchronous signal
detected by EFM signal matches synchronous signal internally generated.

79*

DEFECT

In/Output

Input mode

Defect terminal. After resetting, it is configured as an input terminal. It can be controlled
 from the outside. It also becomes a defect monitor terminal under command control

80*

EFMO

Output

Unfixed

EFM signal output terminal.

In this unit, the terminal with asterisk mark (*) is (open) terminal which 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 (VDD5V) for a microcomputer interface :
CE (65pin), CL (66pin), DI (67pin), DO (68pin), INT (69pin), WRQ (70pin), RES (71pin), DRF (72pin),
CONT6 (75pin), CONT7 (76pin)