Sony KMS-2608/J1N User Manual

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Checking Procedure :
1. Load a continuously recorded test disc (MDW-74/GA-1).

(Refer to “5-5. Using the Continuously Recorded Disc”.)

2. Rotate the  AMS  knob and display “CPLAY1 MODE”.
3. Press the  YES  button and display “CPLAY1 MID”.
4. The display changes to “C1 = 

 AD = 

”.

5. If the C1 error rate is below 20, check that ADER is 00.
6. Press the  MENU/NO  button, stop playback, press the  A  but-

ton, and test disc.

Checking Procedure :
1. Load a check disc (MD) TDYS-1.
2. Rotate the  AMS  knob and display “CPLAY1 MODE”.
3. Press the  YES  button twice and display “CPLAY1 MID”.
4. The display changes to “C1 = 

 AD = 

”.

5. Check that the C1 error rate is below 20.
6. Press the  MENU/NO  button, stop playback, press the  A  but-

ton, and the test disc.

Prepare a continuous recording disc using the unit to be repaired
and check the error rate.

Checking Procedure :
1. Insert a recordable test disc (MDW-74/GA-1) into the unit.
2. Rotate the  AMS  knob to display “CREC1 MODE”.
3. Press the  YES  button to display the “CREC1 MID”.
4. When recording starts, “  

  ” is displayed, this becomes

“CREC (@@@@)” (@@@@ is the address), and recording
starts.

5. About 1 minute later, press the  MENU/NO  button to stop

continuous recording.

6. Rotate the  AMS  knob to display “C PLAY1 MODE”.
7. Press the  YES  button to display “C PLAY1 MID”.
8. “C1 = 

 AD = 

” will be displayed.

9. Check that the C1 error becomes below 20 and the AD error

below 2.

10. Press the  MENU/NO  button to stop playback, and press the

A  button and remove the disc.

Ω

4

6

Change the focus bias and check the focus tolerance amount.
Checking Procedure :
1. Load a continuously recorded test disc (MDW-74/GA-1).

(Refer to “5-5. Using the Continuously Recorded Disc”.)

2. Rotate the  AMS  knob and display “CPLAY1 MODE”.
3. Press the  YES  button and display “CPLAY1 MID”.
4. Press the  MENU/NO  button when “C = 

 AD = 

” is

displayed.

5. Rotate the  AMS  knob and display “FBIAS CHECK”.
6. Press the  YES  button and display “ 

/

 c = 

”.

The first four digits indicate the C1 error rate, the two digits
after [/] indicate ADER, and the 2 digits after [c =] indicate the
focus bias value.
Check that the C1 error is below 20 and ADER is below 2.

7. Press the  YES  button and display “ 

/

 b = 

”.

Check that the C1 error is below 100 and ADER is below 2.

8. Press the  YES  button and display “ 

/

 a = 

”.

Check that the C1 error is below 100 and ADER is below 2.

9. Press the  MENU/NO  button, next press the  A  button, and

remove the test disc.

16. Observe the waveform of the oscilloscope, and check that the

specified value is satisfied. Do not rotate the  AMS  knob.

(Traverse Waveform)

17. Press the  YES  button and display “EF CD CHECK”.
18. Press the  A  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 oscillo-

scope as shown in the following figure so that it can be
seen more clearly.

IA – BI