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SONY MDSW1
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of SONY MDSW1 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Text excerpt from page 47 (click to view)
11. Rotate the AMS knob until the waveform of the oscilloscope moves closer to the specified value. In this adjustment, waveform varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible. (Traverse Waveform)

5-12. FOCUS BIAS ADJUSTMENT
Adjusting Procedure : 1. Load a test disk (MDW-74/AU-1). 2. Rotate the AMS knob and display “CPLAY MODE” (S: 30). 3. Press the YES button and display “CPLAY MID”. 4. Press the MENU/NO button when “C = AD = ” is displayed. 5. Rotate the AMS knob and display “FBIAS ADJUST” (S: 13). 6. Press the YES button and display “ / a = ”. The first four digits indicate the C1 error rate, the two digits after [/] indicate ADER, and the 2 digits after [a =] indicate the focus bias value. 7. Rotate the AMS knob in the clockwise direction and find the focus bias value at which the C1 error rate becomes 220 (Refer to Note 2). 8. Press the YES button and display “ / b = ”. 9. Rotate the AMS knob in the counterclockwise direction and find the focus bias value at which the C1 error rate becomes 220. 10. Press the YES button and display “ / c = ”. 11. Check that the C1 error rate is below 50 and ADER is 00. Then press the YES button. 12. If the “( )” in “ ( )” is above 20, press the YES button. If below 20, press the MENU/NO button and repeat the adjustment from step 2. 13. Press the §EJECT button to remove the test disc. Note 1 : The relation between the C1 error and focus bias is as shown in the following figure. Find points a and b in the following figure using the above adjustment. The focal point position C is automatically calculated from points a and b. Note 2 : As the C1 error rate changes, perform the adjustment using the average vale.
C1 error

A VC B

Specification A = B

12. Press the YES button, and save the adjustment results in the non-volatile memory. (“EFB = SAV” will be displayed for a moment.) Next “EF MO ADJUS” is displayed. The disc stops rotating automatically. 13. Press the §EJECT button and remove the disc. 14. Load the check disc (MD) TDYS-1. 15. Roteto AMS knob and display “EF CD ADJUS” (S: 12). 16. Press the YES button and display “EFB = CD”. Servo is imposed automatically. 17. Rotate the AMS knob so that the waveform of the oscilloscope moves closer to the specified value. In this adjustment, waveform varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible. (Traverse Waveform)

A VC B

220

Specification A = B

18. Press the YES button, display “EFB = SAV” for a moment and save the adjustment results in the non-volatile memory. Next “EF CD ADJUS” will be displayed. 19. Press the §EJECT button and remove the check disc (MD) TDYS-1. Note 1 : MO reading data will be erased during if a recorded disc is used in this adjustment. Note 2 : If the traverse waveform is not clear, connect the oscilloscope as shown in the following figure so that it can be seen more clearly.
Oscilloscope

b

c

a

Focus bias value (F. BIAS)

BD board CN110 pin 3 (TEO) CN110 pin 1 (VC)

330 kΩ 10pF

– 47 –

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