Sony MDM-7A, NEW Section Test Mode, Precautions for USE of Test Mode, Setting the Test Mode

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SECTION 4

TEST MODE

4-1. PRECAUTIONS FOR USE OF TEST MODE

•As loading related operations will be performed regardless of the test mode operations being performed, be sure to check that the disc is stopped before setting and removing it.

Even if the A EJECT button is pressed while the disc is rotating during continuous playback, continuous recording, etc., the disc will not stop rotating.

Therefore, it will be ejected while rotating.

Be sure to press the A EJECT button after pressing the MENU/NO button and the rotation of disc is stopped.

4-1-1. Recording laser emission mode and operating buttons

•Continuous recording mode (CREC 1MODE)

•Laser power check mode (LDPWR CHECK)

•Laser power adjustment mode (LDPWR ADJUS)

•Iop check (Iop Compare)

•Iop value nonvolatile writing (Iop NV Save)

•Traverse (MO) check (EF MO CHECK)

•Traverse (MO) adjustment (EF MO ADJUS)

•When pressing the z REC button.

4-2. SETTING THE TEST MODE

The following are two methods of entering the test mode.

Procedure 1: While pressing the AMS knob and x button, connect the power plug to an outlet, and release the AMS knob and x button. When the test mode is set, “[Check]” will be displayed. Rotating the AMS knob switches between the following three groups;

··· y Check y Service y Develop y ···.

Procedure 2: While pressing the AMS knob, connect the power plug to the outlet and release the AMS knob.

When the test mode is set, “TEMP CHECK” will be displayed. By setting the test mode using this method, only the “Check” group of method 1 can be executed.

NOTE: Do not use the test mode in the [Develop] group. If used, the unit may not operate normally.

If the [Develop] group is set accidentally, press the MENU/NO button immediately to exit the [Develop] group.

4-3. EXITING THE TEST MODE

Press the REPEAT button. The disc is ejected when loaded, and “Standby” display blinks, and the STANDBY state is set.

4-4. BASIC OPERATIONS OF THE TEST MODE

All operations are performed using the AMS knob, YES button, and MENU/NO button.

The functions of these buttons are as follows.

	Function name		Function

MENU/NO button			Cancel or move to top hierarchy

YES button			Set

AMS		Left or Right	Select
AMS
knob		Push	Set submenu
		Push	Set submenu

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Contents Specifications InputsOutputs General Where purchased Power requirementsSupplied accessories SELF-DIAGNOSIS FunctionItems of Error History Mode Items and Contents Exploded Views Table of ContentsDisassembly DiagramsLeakage Section Service NotesSafety CHECK-OUT Flexible Circuit Board RepairingIOP JIG for Checking BD Board WaveformRecord Precedure Checks Prior to Parts Replacement and Adjustments Forced ResetMain Board Component Side Bit Binary Retry Cause Display ModeBit When Binary Higher Bits Lower Bits Hexa DetailsHexadecimal Binary Section General Front Panel Section Section DisassemblyPT BOARD, VOL-SEL Board Main BoardBD Board Mechanism Deck Section MDM-7AExiting the Test Mode Section Test ModePrecautions for USE of Test Mode Setting the Test ModeDisplay Details Mark Group Selecting the Test ModeMENU/NO Operating the Continuous Playback ModeMID OUTFunctions of Other Buttons Test Mode DisplaysMode display Error rate displayInformation When Memory NG is DisplayedMeanings of Other Displays Automatic SELF-DIAGNOSIS FunctionSection Electrical Adjustments Parts Replacement and AdjustmentCheck before replacement YES Adjustment flowPrecautions for Checking Laser Diode Emission Precautions for USE of Optical PICK- UP KMS-260BPrecautions for Adjustments Checks 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 CheckInitial Setting of Adjustment Value Temperature Compensation Offset AdjutmentLaser Power Adjustment Iop NV Save Traverse AdjustmentYES Focus Bias AdjustmentMO 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 Section DiagramsFor schematic diagrams For printed wiring boardsMDS-JE440 Block Diagrams BD SectionSclk Cclk Control Generator OSC Main SectionBD Board Main BoardDisplay Board Semiconductor Printed Wiring Board BD SectionPIN PIN Function Printed Wiring Board Main Section Side a Printed Wiring Board Main Section Side B PIN MDS-JE440 Schematic Diagram Main /3 See page 47 for IC Block Diagrams Printed Wiring Board Power Section Printed Wiring Board Display Section Schematic Diagram Display Section See page 34 for Waveforms IC101 CXA2523AR BD Board IC Block DiagramsIC400 LA5643 Main Board Pin No Pin Name Function IC PIN FunctionsMNT3 Sloc MNT0 FOKMNT1 Shck MNT2 XbusyAvdd MvciAsyo AsyiFS4 TfdrFfdr FrdrIC1 M30805SGP System Control Main Board HLDA/ALE Chassis Section Section Exploded ViewsNot supplied FL771 202 220 201 213 215 216 205 218 207 Mechanism MDM-7A259 Description Remarks Ref. No Section Electrical Parts ListIC TC7WU04FUTE12R Display KEY-SW SWITCH, Keyboard MENU/NOCN1 MainDiode MA8047-TX Vibrator Main VOL-SELSony Corporation