Sony MDS-NT1 service manual Apc

Page 54

MDS-NT1

Pin No.

Pin Name

I/O

Description

 

 

 

 

100

APC

O

Reference PWM signal output to the RF amplifier for the laser automatic power control

 

 

 

 

101

LDDR

O

PWM signal output terminal for laser digital automatic power control Not used

 

 

 

 

102

TRDR

O

Tracking servo drive PWM signal (–) output

 

 

 

 

103

TFDR

O

Tracking servo drive PWM signal (+) output

104

FFDR

O

Focus servo drive PWM signal (+) output

105

FRDR

O

Focus servo drive PWM signal (–) output

 

 

 

 

106

FS4

O

Clock signal (176.4 kHz) output terminal (X’tal system) Not used

 

 

 

 

107

SRDR

O

Sled servo drive PWM signal (–) output

 

 

 

 

108

SFDR

O

Sled servo drive PWM signal (+) output

 

 

 

 

109

SPRD

O

Spindle servo drive PWM signal (–) output

110

SPFD

O

Spindle servo drive PWM signal (+) output

111

FGIN

I

FG input terminal for spindle servo Not used

112 to 114

TST1 to TST3

I

Input terminal for the test

 

 

 

 

115

EFMO

O

EFM signal output terminal when recording mode “L” is output when playback mode

 

 

 

 

116

VDIO1

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

 

 

 

 

117

VSIO1

Ground terminal (for I/O)

 

 

 

 

118

VDC4

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

119

VSC4

Ground terminal (for core)

120

MDDT1

I

MD data mode selection signal input terminal

“L”: normal mode, “H”: MD data mode (fixed at “L” in this set)

 

 

 

 

 

 

 

54

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Contents Specifications MDS-NT1Playback Recording Cause/Remedy Indicator Green Red MDS-NT1 SELF-DIAGNOSIS FunctionItems of Error History Mode Items and Contents MDS-NT1Table of Error Codes Error Code Details of ErrorDiagrams Table of ContentsDisassembly SELF-DIAGNOSIS FunctionFlexible Circuit Board Repairing MDS-NT1 Section Servicing Notes BD Board Conductor SideJIG for Checking BD Board Waveform Record Procedure Checks Prior to Parts Replacement and Adjustments in MD Criteria for Determination Measure if unsatisfactoryMicrocomputer Version Display Service ModeSoftware Reset System RequirementsMDS-NT1 Section General Front ViewMDS-NT1 Section Disassembly Disassembly FlowCase Upper Main Board MD Mechanism Deck MDM-7S2BFront Panel Section BD BOARD, Over Write Head HR901Holder Assy Loading Motor Assy M103Sled Motor Assy M102 Optical PICK-UP KMS-262ESpindle Motor Assy M101 Setting the Test Mode MDS-NT1 Section Test ModePrecautions for USE of Test Mode Releasing the Test ModeSelecting the Test Mode CheckOperating the Continuous Playback Mode Automatic SELF-DIAGNOSIS Function InformationMDS-NT1 Section Electrical Adjustments Parts Replacement and AdjustmentCheck before replacement Adjustment flow YESHOW to Identify Optical PICK-UP KMS- 262A/KMS-262E Precautions for Checking Laser Diode EmissionPrecautions for USE of Optical PICK- UP KMS-262A/262E KMS-262A KMS-262EPrecautions for Adjustments Laser power meterLaser Power Check Using the Continuously Recorded DiscTemperature Compensation Offset Check Checks Prior to RepairsAuto Check Other ChecksTraverse Check Focus Bias Check Play Check MO Error Rate CheckCD Error Rate Check Self-Recording/playback CheckLaser Power Adjustment Initial Setting of Adjustment ValueTemperature Compensation Offset Adjustment Recording and Displaying the IopTraverse Adjustment Iop NV SaveFocus Bias Adjustment ENTER/YES buttonCD Auto Gain Control Output Level Adjustment Error Rate CheckAuto Gain Control Output Level Adjustment MO Auto Gain Control Output Level AdjustmentAdjustment and Checking Loacation MDS-NT1 Section Diagrams Block Diagram Servo SectionBlock Diagram Main Section 36 aWaveforms BD Board 22.7 nsPrinted Wiring Board BD Board Semiconductor Location4AA 3AA Schematic Diagram BD Board 2/2 See page 38 for Waveforms B3B 2BBPrinted Wiring Board Main Board Component Side IC451Printed Wiring Board Main Board Conductor Side Main Board1AA AA2 AA3 GND Printed Wiring Board Panel Board Panel Board Conductor SideSchematic Diagram Panel Board IC Block Diagrams BD Board CXA2523ARIC401 BH6519FS-E2 Main BoardIC440 M54641L BD Board IC101 CXA2523AR RF AMP, FOCUS/TRACKING Error AMP IC PIN Function DescriptionMNT2 Xbusy Xcas APC Main Board IC301 M30835FJGP-01 System Controller PLAY-SW Pin No Extal Section MDS-NT1 Exploded Views Case Section56 4-951-620-01 Screw 2.6X8, +BVTP Case B Section 102 101 103104 105 311 310 319 304 308 302 306 320 301 305 313 314 315 316317 303 307 364 359358 357 360 356 355 354 362 359 352MDS-NT1 Section Electrical Parts List ResistorsDiode Switch MDS-NT1 MainFB1 MDS-NT1 Main Panel MiscellaneousMotor ASSY, Loading Revision History