Sony HCD-MDX10 Service Manual - Page 32

6. Rotate the AMS dial so that the reading of the laser power meter becomes 6.9 to 7.1 mW, press the ENTER/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 dial and display "LDPWR CHECK". 8. Press the ENTER/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 ENTER/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. Note down the digital voltmeter reading value. Specified Value : Laser power meter reading : 7.0 ± 0.1 mW Digital voltmeter reading : Optical pick-up displayed value ± 10% (Optical pick-up label) KMS260A 27X40 B0825 (For details of the method for checking this value, refer to "7-8. Recording and Displaying IOP Information".) N Iop = 82.5 mA in this case Iop (mA) = Digital voltmeter reading (mV)/1 (Ω) 10. Press the MENU/NO button and display "LDPWR CHECK" and stop the laser emission. (The MENU/NO button is effective at all times to stop the laser emission.) 11. Rotate the AMS knob to display "Iop.Write". 12. Press the ENTER/YES button. When the display becomes Ref=@@@.@ (@ is an arbitrary number), press the ENTER/ YES button to display "Measu=@@@.@" (@ is an arbitrary number). 13. The numbers which can be changed will blink. Input the Iop value noted down at step 9. To select the number : Rotate the AMS dial. To select the digit : Press the AMS dial. 14. When the ENTER/YES button is pressed, "Complete!" will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become "Iop Write". Note 1: After step 4, each time the ENTER/YES button is pressed, the display will be switched between "LD 0.7 mW $ ", "LD 6.2 mW $ ", and "LD WP $ ". Nothing needs to be performed here. 7-11. TRAVERSE ADJUSTMENT Connection : Oscilloscope BD board CN110 pin 3 (TE) CN110 pin 1 (VC) V : 0.5 V/div H : 10 ms/div Input : DC mode Adjusting Procedure : 1. Connect an oscilloscope to CN110 pin 3 (TE) and CN110 pin 1 (VC) of the BD board. 2. Load a disc (any available on the market). (Refer to Note 1.) 3. Press the p button and display the "MD", and then press the p button and display the "MD", and then press the ) button and move the optical pick-up outside the pit. 4. Rotate the AMS dial and display "EF MO ADJUS" (C11). 5. Press the ENTER/YES button and display "EFB = MO-R". (Laser power READ power/Focus servo ON/tracking servo OFF/ spindle (S) servo ON) 6. Rotate the AMS dial so that the waveform of the oscilloscope becomes the specified value. (When the AMS dial is rotated, the of "EFB= " changes and the waveform changes.) In this adjustment, waveform varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible. (Read power traverse adjustment) (Traverse Waveform) A VC B Specification A = B 7. Press the ENTER/YES button and save the result of adjustment to the non-volatile memory ("EFB = SAVE" will be displayed for a moment. Then "EFB = MO-W" will be displayed). 8. Rotate the AMS dial so that the waveform of the oscilloscope becomes the specified value. (When the AMS dial is rotated, the of "EFB- " changes and the waveform changes.) In this adjustment, waveform varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible. (Write power traverse adjustment) (Traverse Waveform) A VC B Specification A = B 9. Press the ENTER/YES button, and save the adjustment results in the non-volatile memory. ("EFB = SAVE" will be displayed for a moment.) 10. "EFB = MO-P". will be displayed. The optical pick-up moves to the pit area automatically and servo is imposed. - 32 -