Sony MDS-NT1 service manual Xcas

Page 53

MDS-NT1

Pin No.

Pin Name

I/O

Description

 

 

 

 

41

A11

O

Address signal output to the external D-RAM Not used

 

 

 

 

42 to 45

D0 to D3

I/O

Two-way data bus with the D-RAM

 

 

 

 

46

XCAS

O

Column address strobe signal output to the D-RAM “L” active

 

 

 

 

47

XRAS

O

Row address strobe signal output to the D-RAM “L” active

48 to 56

A00 to A02,

O

Address signal output to the D-RAM

A05 to A10

 

 

 

 

 

 

 

57

VDC2

—

Power supply terminal (+2.5V) (for core)

 

 

 

 

58

VSC2

—

Ground terminal (for core)

 

 

 

 

59, 60

A03, A04

O

Address signal output to the D-RAM

 

 

 

 

61

DRVDD1

—

Power supply terminal (+3.3V) (for D-RAM interface)

 

 

 

 

62

DRVSS1

—

Ground terminal (for D-RAM interface)

63, 64

TEST0, TEST1

I

Not used

65

TEST2

O

Not used

 

 

 

 

66

AVD1

—

Power supply terminal (+3.3V) (analog system)

 

 

 

 

67

ASYO

O

Playback EFM full-swing output

 

 

 

 

68

ASYI

I

Playback EFM comparator slice voltage input

 

 

 

 

69

BIAS

I

Playback EFM comparator bias current input

70

RFI

I

Playback EFM RF signal input from the RF amplifier

71

AVS1

—

Ground terminal (analog system)

 

 

 

 

72

PCO

O

Phase comparison output for master clock of the recording/playback EFM master PLL

 

 

 

 

73

FILI

I

Filter input for master clock of the recording/playback EFM master PLL

 

 

 

 

74

FILO

O

Filter output for master clock of the recording/playback EFM master PLL

 

 

 

 

75

CLTV

I

Internal VCO control voltage input of the recording/playback EFM master PLL

76

PEAK

I

Light amount signal (RF/ABCD) peak hold input from the RF amplifier

77

BOTM

I

Light amount signal (RF/ABCD) bottom hold input from the RF amplifier

 

 

 

 

78

ABCD

I

Light amount signal (ABCD) input from the RF amplifier

 

 

 

 

79

FE

I

Focus error signal input from the RF amplifier

 

 

 

 

80

AUX1

I

Auxiliary signal (I3 signal/temperature signal) input from the RF amplifier

 

 

 

 

81

VC

I

Middle point voltage (+1.65V) input from the RF amplifier

82

ADIO

O

Output terminal for the test

83

ADRT

I

A/D converter operational range upper limit voltage input terminal (fixed at “H” in this set)

 

 

 

 

84

ADRB

I

A/D converter operational range lower limit voltage input terminal (fixed at “L” in this set)

 

 

 

 

85

SE

I

Sled error signal input from the RF amplifier

 

 

 

 

86

TE

I

Tracking error signal input from the RF amplifier

 

 

 

 

87

AVD2

—

Power supply terminal (+3.3V) (analog system)

88

AVS2

—

Ground terminal (analog system)

89

DCHG

I

Connected to the +3.3V power supply

90

APC

I

Error signal input terminal for laser digital automatic power control Not used

 

 

 

 

91

ADFG

I

ADIP duplex FM signal (22.05 kHz ± 1 kHz) input from the RF amplifier

 

 

 

 

92

VDIO1

—

Power supply terminal (+3.3V) (for I/O)

 

 

 

 

93

VSIO1

—

Ground terminal (for I/O)

94

F0CN

O

Filter f0 control signal output to the RF amplifier

95

VDC3

—

Power supply terminal (+2.5V) (for core)

96

VSC3

—

Ground terminal (for core)

 

 

 

 

97

XLRF

O

Serial data latch pulse signal output to the RF amplifier

 

 

 

 

98

CKRF

O

Serial data transfer clock signal output to the RF amplifier

 

 

 

 

99

DTRF

O

Writing serial data output to the RF amplifier

 

 

 

 

53

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Contents MDS-NT1 SpecificationsMDS-NT1 SELF-DIAGNOSIS Function Playback Recording Cause/Remedy Indicator Green RedMDS-NT1 Items of Error History Mode Items and ContentsError Code Details of Error Table of Error CodesDisassembly Table of ContentsDiagrams SELF-DIAGNOSIS FunctionFlexible Circuit Board Repairing BD Board Conductor Side MDS-NT1 Section Servicing NotesJIG for Checking BD Board Waveform Record Procedure Criteria for Determination Measure if unsatisfactory Checks Prior to Parts Replacement and Adjustments in MDSoftware Reset Service ModeMicrocomputer Version Display System RequirementsFront View MDS-NT1 Section GeneralDisassembly Flow MDS-NT1 Section DisassemblyCase Upper MD Mechanism Deck MDM-7S2B Main BoardBD BOARD, Over Write Head HR901 Front Panel SectionLoading Motor Assy M103 Holder AssyOptical PICK-UP KMS-262E Sled Motor Assy M102Spindle Motor Assy M101 Precautions for USE of Test Mode MDS-NT1 Section Test ModeSetting the Test Mode Releasing the Test ModeCheck Selecting the Test ModeOperating the Continuous Playback Mode Information Automatic SELF-DIAGNOSIS FunctionCheck before replacement MDS-NT1 Section Electrical AdjustmentsParts Replacement and Adjustment YES Adjustment flowPrecautions for USE of Optical PICK- UP KMS-262A/262E Precautions for Checking Laser Diode EmissionHOW to Identify Optical PICK-UP KMS- 262A/KMS-262E KMS-262A KMS-262ELaser power meter Precautions for AdjustmentsTemperature Compensation Offset Check Using the Continuously Recorded DiscLaser Power Check Checks Prior to RepairsTraverse Check Auto CheckOther Checks CD Error Rate Check Play Check MO Error Rate CheckFocus Bias Check Self-Recording/playback CheckTemperature Compensation Offset Adjustment Initial Setting of Adjustment ValueLaser Power Adjustment Recording and Displaying the IopIop NV Save Traverse AdjustmentENTER/YES button Focus Bias AdjustmentAuto Gain Control Output Level Adjustment Error Rate CheckCD Auto Gain Control Output Level Adjustment MO Auto Gain Control Output Level AdjustmentAdjustment and Checking Loacation Block Diagram Servo Section MDS-NT1 Section Diagrams36 a Block Diagram Main Section22.7 ns Waveforms BD BoardSemiconductor Location Printed Wiring Board BD Board4AA 3AA B3B 2BB Schematic Diagram BD Board 2/2 See page 38 for WaveformsIC451 Printed Wiring Board Main Board Component SideMain Board Printed Wiring Board Main Board Conductor Side1AA AA2 AA3 GND Panel Board Conductor Side Printed Wiring Board Panel BoardSchematic Diagram Panel Board CXA2523AR IC Block Diagrams BD BoardMain Board IC401 BH6519FS-E2IC440 M54641L IC PIN Function Description BD Board IC101 CXA2523AR RF AMP, FOCUS/TRACKING Error AMPMNT2 Xbusy Xcas APC Main Board IC301 M30835FJGP-01 System Controller PLAY-SW Pin No Extal Case Section Section MDS-NT1 Exploded Views56 4-951-620-01 Screw 2.6X8, +BVTP 104 105 Case B Section102 101 103 317 303 307 311 310 319 304 308302 306 320 301 305 313 314 315 316 358 357 360 356 359364 355 354 362 359 352Resistors MDS-NT1 Section Electrical Parts ListDiode MDS-NT1 Main SwitchFB1 Miscellaneous MDS-NT1 Main PanelMotor ASSY, Loading Revision History
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