Stb, Beep SW, REC Flcs, JOG0, JOG1, Iop, Model SEL | Sony MDS-JE770

MDS-JE770

Pin No.			Pin Name	I/O	Description

81		STB		O	Strobe signal output to the power supply circuit. H: Power supply ON: L: standby

82		BEEP SW		—	Not used.

83				—	Not used.
83		REC		—	Not used.

84		FLCS		O	Chip select signal output to the MSM9202 (IC760)

85, 86		D.VOL0,1		—	Not used.

87, 88		JOG0, JOG1		I	Jog dial pulse input from the rotary encoder.

89		IOP		I	Optical Pick-up voltage (current) detect signal input.

90		DISTINATION		I	Model discrimination.

91		MODEL SEL		I	Model discrimination.

92		TIMER		I	Timer select signal input

93		KEY3		I	Key input pin (A/D input)

94, 95		KEY2, 1		I	Key input pin (A/D input)

96		AVSS		—	Ground. (Analog)

97		KEY0		I	Key input pin (A/D input)

98		VREF		I	A/D reference voltage.

99		AVCC		I	Power supply. (+3.3V)

100		NC		I	Not used. (Fixed at L)

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Sony MDS-JE770 specifications Stb, Beep SW, REC Flcs, JOG0, JOG1, Iop, Distination, Model SEL, Timer, KEY3, KEY0, Avcc

Contents

MDS-S50 Specifications873-890-11 MDM-7A MDS-JE770 Genera l Power requirementsSupplied accessories SELF-DIAGNOSIS Function Items of Error History Mode Items and Contents Diagrams Table of ContentsDisassembly Exploded Views MDS-JE770 Section Service Notes Flexible Circuit Board Repairing JIG for Checking BD Board Waveform IOP Record Precedure KSN-260E Optical PICK-UP Block Type Discrimination Forced Reset Checks Prior to Parts Replacement and AdjustmentsMain Board Component Side Retry Cause Display Mode Bit Binary Higher Bits Lower Bits Hexa Details Bit When BinaryHexadecimal Binary MDS-JE770 Section General Button Descriptions MDS-JE770 Section Disassembly Disassembly Flow Front Panel Section Main Board Two screws Mechanism Deck Section MDM-7A Over Light Head HR901, BD Board Holder Assy Loading Motor Assy M103 Sled Motor Assy M102, Slider Optical PICK-UP Spindle Moter Assy M101 Setting the Test Mode MDS-JE770 Section Test ModePrecautions for USE of Test Mode Exiting the Test Mode Selecting the Test Mode Operating the Continuous Playback Mode MENU/NO Error rate display Test Mode DisplaysMode display Functions of Other Buttons Automatic SELF-DIAGNOSIS Function When Memory NG is DisplayedMeanings of Other Displays Information Parts Replacement and Adjustment MDS-JE770 Section Electrical AdjustmentsCheck before replacement Adjustment flow Auto Gain Control Output Level Precautions for Adjustments Precautions for Checking Laser Diode EmissionPrecautions for USE of Optical PICK- UP KMS-260B/260E Temp Adjust Using the Continuously Recorded Disc Checks Prior to Repairs Traverse Check Auto CheckOther Checks Traverse Waveform Focus Bias Check Play Check MO Error Rate CheckCD Error Rate Check Self-Recording/playback Check Temperature Compensation Offset Adjutment Initial Setting of Adjustment ValueLaser Power Adjustment Traverse Adjustment Iop NV Save Focus Bias Adjustment CD Auto Gain Control Output Level Adjustment Error Rate CheckAuto Gain Control Output Level Adjustment MO Auto Gain Control Output Level Adjustment Adjusting Points and Connecting Points MDS-JE770 Section Diagrams Circuit Boards Location BD Board For schematic diagramsFor printed wiring boards Main Board IC171 Block Diagrams BD SectionIC190 IC360 2/2 Main SectionIC1 2/2 Optical Pick UP Block SemiconductorOVERSemiconductor Write Head Board Board Main Main Schematic Diagram Main /2 See page 51 for IC Block Diagrams Model is printed on diagram IC1 KEY-SW Board Display BoardKB Board HP Board Schematic Diagram Display Section LED Drive D910 RY910C951 C952 CN921 C924 LF900 C910 Schematic Diagram Power Section Main IC Block Diagrams IC101 CXA2523AR BD Board IC500 AK4524 Main Board IC101 CXA2523AR RF Amplifier BD Board IC PIN Function DescriptionPin No Pin Name Description Pin No Pin Name Desription Asyi MvciAsyo Avdd Frdr TfdrFfdr FS4 Fldt IIC PowerADA.RESET Flck DINT1/H Clip ADA. LatchEPN Protect Beep SW TimerSTB REC Flcs VFL1 ResetVDISP1 OSC0 Section Exploded Views Chassis Section FL750 1-517-987-11 Indicator TUBE, Fluorescent Not supplied Supplied with J790 FL750 With RV790 Mechanism MDM-7A Motor ASSY, Sled HEAD, Over LightMotor ASSY, Spindle Motor ASSY, Loading MDS-JE770 Section Electrical Parts List Jumper Resistor SwitchMetal Chip Short MDS-JE770 Display HP KB KEY-SW KEY-SW Main MDS-JE770 Main 2SD2144S-TP-UVW Resistor MDS-JE770 Main PT VOL-SEL Memo MDS-JE770 Revision History