Sony MDS-JE770 specifications VDISP1, VFL1, OSC0, OSC1, Reset, Vdd, VFL2, VDISP2

Page 59

MDS-JE770

• IC760 MSM9201-04GS-K FL DRIVER (DISPLAY BOARD)

Pin No.

Pin Name

I/O

Description

 

 

 

 

 

1, 2

AD3, AD4

O

Fluorescent display tube (FL760) anode electrode drive

 

 

 

 

 

3-37

SEG1-35

O

Fluorescent display tube (FL760) segment electrode drive

 

 

 

 

 

38

VDISP1

I

Power supply for fluorescent display tube (FL760) drive

 

 

 

 

 

39-62

COM1-24

O

Fluorescent display tube (FL760) grid electrode drive

 

 

 

 

 

63

VFL1

I

Power supply for fluorescent display tube (FL760) drive

 

 

 

 

 

64

GND

—

Ground

 

 

 

 

 

65

OSC0

I

Input for CR oscillation

 

 

 

 

 

66

OSC1

O

Output for CR oscillation

 

 

 

 

 

67

RESET

I

Reset input

 

 

 

 

 

68

CS

I

Chip select signal input from system controller (IC1)

 

 

 

 

 

69

CP

I

Shift clock signal input from system controller (IC1)

 

 

 

 

 

70

DA

I

Serial data signal input from system controller (IC1)

 

 

 

 

 

71

VDD

I

Power supply

 

 

 

 

 

72

P1

O

LED drive signal output

 

 

 

 

 

73

P2

O

LED drive signal output

 

 

 

 

 

74

P3

O

LED drive signal output Not used in this set (NC)

 

 

 

 

 

75

P4

O

LED drive signal output

 

 

 

 

 

76

VFL2

I

Power supply for fluorescent display tube (FL760) drive

 

 

 

 

 

77

NC

—

Not used

 

 

 

 

 

78

VDISP2

I

Power supply for fluorescent display tube (FL760) drive

 

 

 

 

 

79, 80

AD3, AD4

O

Fluorescent display tube (FL760) anode electrode drive

 

 

 

 

 

59

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Contents MDM-7A Specifications873-890-11 MDS-S50SELF-DIAGNOSIS Function Genera l Power requirementsSupplied accessories MDS-JE770Items of Error History Mode Items and Contents Exploded Views Table of ContentsDisassembly DiagramsFlexible Circuit Board Repairing MDS-JE770 Section Service NotesIOP JIG for Checking BD Board WaveformRecord Precedure Optical PICK-UP Block Type Discrimination KSN-260EMain Board Component Side Checks Prior to Parts Replacement and AdjustmentsForced Reset Bit Binary Retry Cause Display ModeHexadecimal Binary Bit When BinaryHigher Bits Lower Bits Hexa Details Button Descriptions MDS-JE770 Section GeneralDisassembly Flow MDS-JE770 Section DisassemblyFront Panel Section Two screws Main BoardOver Light Head HR901, BD Board Mechanism Deck Section MDM-7ALoading Motor Assy M103 Holder AssyOptical PICK-UP Sled Motor Assy M102, SliderSpindle Moter Assy M101 Exiting the Test Mode MDS-JE770 Section Test ModePrecautions for USE of Test Mode Setting the Test ModeSelecting the Test Mode MENU/NO Operating the Continuous Playback ModeFunctions of Other Buttons Test Mode DisplaysMode display Error rate displayInformation When Memory NG is DisplayedMeanings of Other Displays Automatic SELF-DIAGNOSIS FunctionCheck before replacement MDS-JE770 Section Electrical AdjustmentsParts Replacement and Adjustment Auto Gain Control Output Level Adjustment flowTemp Adjust Precautions for Checking Laser Diode EmissionPrecautions for USE of Optical PICK- UP KMS-260B/260E Precautions for AdjustmentsChecks Prior to Repairs Using the Continuously Recorded DiscTraverse Waveform Auto CheckOther Checks Traverse CheckSelf-Recording/playback Check Play Check MO Error Rate CheckCD Error Rate Check Focus Bias CheckLaser Power Adjustment Initial Setting of Adjustment ValueTemperature Compensation Offset Adjutment Iop NV Save Traverse AdjustmentFocus Bias Adjustment MO Auto Gain Control Output Level Adjustment Error Rate CheckAuto Gain Control Output Level Adjustment CD Auto Gain Control Output Level AdjustmentAdjusting Points and Connecting Points Circuit Boards Location MDS-JE770 Section DiagramsMain Board For schematic diagramsFor printed wiring boards BD BoardIC190 Block Diagrams BD SectionIC171 IC1 2/2 Main SectionIC360 2/2 Write Head SemiconductorOVERSemiconductor Optical Pick UP BlockBoard Board Main Main Schematic Diagram Main /2 See page 51 for IC Block Diagrams IC1 Model is printed on diagramHP Board Display BoardKB Board KEY-SW BoardLED Drive Schematic Diagram Display SectionCN921 C924 LF900 C910 RY910C951 C952 D910Main Schematic Diagram Power SectionIC101 CXA2523AR BD Board IC Block DiagramsIC500 AK4524 Main Board Pin No Pin Name Description IC PIN Function DescriptionIC101 CXA2523AR RF Amplifier BD Board Pin No Pin Name Desription Avdd MvciAsyo AsyiFS4 TfdrFfdr FrdrFlck IIC PowerADA.RESET FldtProtect ADA. LatchEPN DINT1/H ClipREC Flcs TimerSTB Beep SWOSC0 ResetVDISP1 VFL1Chassis Section Section Exploded ViewsNot supplied Supplied with J790 FL750 With RV790 FL750 1-517-987-11 Indicator TUBE, FluorescentMechanism MDM-7A Motor ASSY, Loading HEAD, Over LightMotor ASSY, Spindle Motor ASSY, SledMDS-JE770 Section Electrical Parts List Short SwitchMetal Chip Jumper ResistorMDS-JE770 Display HP KB KEY-SW KEY-SW Main MDS-JE770 Main 2SD2144S-TP-UVW Resistor VOL-SEL MDS-JE770 Main PTMemo MDS-JE770 Revision History
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