Sony MDS-JD320 Temperature Compensation Offset Adjutment, Laser Power Adjustment, Specified Value

Page 17

5-5. TEMPERATURE COMPENSATION OFFSET ADJUTMENT

Save the temperature data at that time in the non-volatile memory as 25 ˚C reference data.

Note :

1.Usually, do not perform this adjustment.

2.Perform this adjustment in an ambient temperature of 22 ˚C to 28 ˚C. Perform it immediately after the power is turned on when the internal temperature of the unit is the same as the ambient temperature of 22 ˚C to 28 ˚C.

3.When D101 has been replaced, perform this adjustment after the temperature of this part has become the ambient temperature.

Adjusting Method :

1.Rotate the AMS knob and display “TEMP ADJUST”.

2.Press the YES button and select the “TEMP ADJUST” mode.

3.“TEMP = ” and the current temperature data will be displayed.

4.To save the data, press the YES button.

When not saving the data, press the EDIT/NO button.

5.When the YES button is pressed, “TEMP = SAVE” will be displayed and turned back to “TEMP ADJUST” display then. When the EDIT/NO button is pressed, “TEMP ADJUST” will be displayed immediatelly.

Specified Value :

The “TEMP =

” should be within “E0 - EF”, “F0 - FF”, “00 -

0F”, “10 - 1F” and “20 - 2F”.

5-6. LASER POWER ADJUSTMENT

Connection :

Laser power meter

Optical pick-up objective lens

Digital volt meter

BD board

CN110 pin 5 (I+3V)

CN110 pin 4 (IOP)

Adjusting Method :

1.Set the laser power meter on the objective lens of the optical pick-up. (When it cannot be set properly, press the 0button or ) button to move the optical pick-up.)

Connect the digital volt meter to CN110 pin 5 (I+3V) and CN110 pin 4 (IOP).

2.Rotate the AMS knob and display “LDPWR ADJUST”. (Laser power : For adjustment)

3.Press the YES button once and display “LD 0.9 mW $ ”.

4.Rotate the AMS knob so that the reading of the laser power meter becomes 0.86 to 0.92 mW. Press the YES button after setting the range knob of the laser power meter, and save the adjustment results. (“LD SAVE $ ” will be displayed for a moment.)

5.Then “LD 7.0 mW $ ” will be displayed.

6.Rotate the AMS knob so that the reading of the laser power meter becomes 6.9 to 7.1 mW, press the YES button and save it.

Note : Do not perform the emission with 7.0 mW more than 15 seconds continuously.

7.Then, rotate the AMS knob and display “LDPWR CHECK”.

8.Press the YES button once and display “LD 0.9 mW $ ”. Check that the reading of the laser power meter become 0.85 to 0.91 mW.

9.Press the YES button once more and display “LD 7.0 mW $

”. Check that the reading the laser power meter and digital volt meter satisfy the specified value.

Specified Value :

Laser power meter reading : 7.0 ± 0.1 mW

Digital voltmeter reading : Optical pick-up displayed value ± 10%

KMS260A 27X40

B0825

N

Iop = 82.5 mA in this case

Iop (mA) = Digital voltmeter reading (mV)/1 (Ω)

(Optical pick-up label)

10. Press the EDIT/NO button and display “LDPWR CHECK” and stop the laser emission.

(The EDIT/NO button is effective at all times to stop the laser emission.)

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Contents MDM-3GC SpecificationsVarnig Flexible Circuit Board RepairingDisassembly Table of ContentsDiagrams Exploded ViewsSelf-Diagnosis Function SELF-DIAGNOSIS FunctionSection Servicing Note Forced ResetJIG for Checking BD Board Waveform Main Board Component SideFluorescent Display Tube Signs Retry Cause Display ModeHexadecimal nBinary Conversion Table Location of Parts and Controls Section GeneralBracket T, L and R Section DisassemblyCase and Front Panel Assembly SUB Chassis BD BoardOver Write Head Shutter AssemblySlider Complete Assembly Section Test Mode Operating the Continuous Recording Mode Operating the Continuous Playback ModeNon-Volatile Memory Mode MIDMeanings of Other Displays Test Mode DisplaysFunctions of Other Buttons Precautions for Checking Laser Diode Emissinon Section Electrical AdjustmentsPrecautions for USE of Optical PICK- UP KMS-260A Precautions for AdjustmentsSpecified Value Temperature Compensation Offset AdjutmentLaser Power Adjustment Traverse Waveform Traverse AdjustmentError Rate Check Focus Bias AdjustmentAdjusting Points and Conneting Points MDS-JE320Block Diagrams MDS-JE320 Section DiagramsOptical PICK-UP Block MainREC Main SectionWaveform For schematic diagramsFor printed wiring boards Semiconductor Printed Wiring Board BD SectionLocation Schematic Diagram BD /2 See page 26 for Waveforms See page 49 for IC Block Diagrams Main Board Printed Wiring Board Main SectionSchematic Diagram Main /3 MDS-JE320 Schematic Diagram Main /3 Eject SW Board Printed Wiring Board Display SectionDisplay Board Schematic Diagram Display Section Printed Wiring Board Switch Section Schematic Diagram Switch Section BD section IC101 CXA2523R IC Block DiagramsIC121 CXD2650R IC152 BH6511FS IC121 CXD2652ARIC192 L88MS33T IC171 XL24C01AFMain section IC301 LA9615 IC307 CXD8607NIC311 LB1641 IC308 M5218AL IC309 LA5620 IC310 M5293LIC101 RF Amplifier CXA2523R Pin No Pin Name Function IC PIN FunctionsMNT1 Shck MNT0 FOKMNT2 Xbusy MNT3 SlocPin No Pin Name Function Ffdr TfdrFrdr FS4IC307 A/D, D/A converter CXD8607N Pin No Pin Name Function TEST3 TEST2Lvdd LvssPower Down Timer SWDaout ChuckMNT3 MNT2LED0 BUS OUTBeep DIG-RSTDA-RST Dsel A, Dsel BMain Section Section Exploded Views6059 Front Panel SectionPanel ASSY, Front US,CND Button Main201 202 Mechanism Deck MDM-3GC203 204 205 206 207 209 208257 258 260 271 252253 254 259 Section Electrical Parts List Inductor Chip TC74ACT540FSShort InductorControl SW Display Eject SW Main NJM79L12A NJM78L06ASN74HCU04AN Line FilterMDS-JE320 Main

MDS-JD320 specifications

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