CMT-C7NT, HCD-C7NT - Sony Audio Service Manual (repair manual). Page 29

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The Iop value labeled on the optical pick-up can be recorded in
the non-volatile memory. By recording the value, it will eliminate
the need to look at the value on the label of the optical pick-up.
When replacing the optical pick-up or non-volatile memory (IC195
of BD (MD) board), record the Iop value on the optical pick-up
according to the following procedure.

Record Procedure:
1. Press the  ?/1  button to turn the power on.
2. Press the  

FUNCTION 

z  button to set the MD function.

3. Press three buttons of  

VOL -

 ,  x  and 

 CD SYNC HIGH

  ,

simultaneously to enter the MD test mode and display
“[Check]”.

4. Press the  . 

“R”

  or  > 

“R”

  button to display

“[Service]”.

5. Press the  

ENTER/YES “R”

    button to display “AUTO

CHECK”, and press the  > 

“R”

    button to display “Iop

Write”.

6. Press the  

ENTER/YES “R”

  button.

7. The display becomes “Ref= @@@.@” (@ is an arbitrary num-

ber) and the numbers which can be changed will blink.

8. Input the Iop value written on the optical pick-up.

To select the number : Press the

. 

“R”

or > 

“R”

button.

To select the digit

: Press two buttons of  

VOL -

  and

CD 

Z  simultaneously.

9. When the

ENTER/YES “R”

button is pressed, the display

becomes “Measu=@@@.@” (@ is an arbitrary number).

10. As the adjustment results are recorded for the step 9 value.

Leave it as it is and press the  

ENTER/YES “R”

  button.

11. “Complete!” will be displayed momentarily. The value will

be recorded in the non-volatile memory and the display will
become “Iop Write”.

12. Press the  

REPEAT “R”

  button, or press two buttons of

VOL -

  and  

MD 

Z  simultaneously to complete. “Initialize”

will be displayed and release the MD test mode.

Display Precedure:
1. Press the  ?/1  button to turn the power on.
2. Press the  

FUNCTION 

z  button to set the MD function.

3. Press three buttons of  

VOL -

  ,  x  , and 

 CD SYNC HIGH

simultaneously to enter the MD test mode and display
“[Check]”.

4. Press the  . 

“R”

    or  > 

“R”

    button to display “[Ser-

vice]”.

5. Press the  

ENTER/YES “R”

    button to display “AUTO

CHECK”, and press the  > 

“R”

  button to display “Iop Read”.

6. Press the  

ENTER/YES “R”

  button.

7. “@@.@/##.#” is displayed and the recorded contents are dis-

played.
@@.@ : Indicates the Iop value labeled on the pick-up.
##.#

: Indicates the Iop value after adjustment.

8. Press the  

REPEAT “R”

    button or press two buttons of

VOL -

   and  

MD 

Z  simultaneously to complete. “Initialize”

will be displayed and release the MD test mode.

If the nonvolatile memory data is abnormal, “E001 MEMORY NG”
will be displayed so that the MD deck does not continue opera-
tions. In this case, set the test mode promptly and perform the
following procedure.

Procedure:
1. Enter the MD test mode.
2. Normally a message for selecting the test mode will be displayed.

However if the nonvolatile memory is abnormal, the following
will be displayed “INIT EEP?”.

3. Press the

x

  and 

MD 

Z  buttons simultaneously.

4. Press the  

. 

“R”

  or

  >

 “R”

  button to display “MDM-7X2B”.

5. Press the  

FUNCTION 

z  button. If the nonvolatile memory is

successfully overwritten, the normal MD test mode will be set
and a message to select the MD test mode will be displayed.