MDS-NT1 - Sony Audio Service Manual (repair manual). Page 3

3

Display

Details of History

op rec tm

Cumulative recording time is displayed.
When cumulative recording time is over 1 minute, the hour and minute are displayed as they are.
When it is under 1 minute, “Under 1 min” is displayed.
The displayed time shows how long the laser is in high power state.
It is about one fourth the actual recording time.

op play tm

Cumulative playing time is displayed.
When cumulative playing time is over 1 minute, the hour and minute are displayed as they are.
When it is under 1 minute, “Under 1 min” is displayed.

spdl rp tm

Cumulative spindle motor running time is displayed.
When cumulative spindle motor run time is over 1 minute, the hour and minute are displayed as they are.
When it is under 1 minute, “Under 1 min” is displayed.

retry err

Displays the total number of retries during recording and number of retry errors during play.
Displayed as “rss pss”.
“r” indicates the retries during recording while “p” indicates the retry errors during play.
The number of retries and retry errors are displayed in hexadecimal digits from 00 to FF.

total err

Displays the total number of errors.
Displayed as “total ss”.
The number of errors is displayed in hexadecimal digits from 00 to FF.

err history

Displays the 10 latest errors.
Displayed as “0s ErrCd@@”.
s indicates the history number. The smaller the number, the more recent is the error. (00 is the latest).
@@ indicates the error code.
Refer to the following table for the details. The error history can be switched by clicking the 

[JOG UP]

 or

[JOG DOWN]

.

retry adrs

Displays the past five retry addresses.
Displays “ss ADRS ssss”, ss is the history number, ssss is the cluster with the retry error.
Select the error history number using the 

[JOG UP]

 or 

[JOG DOWN]

.

er refresh

Mode to clear the error history and retry address history.
[Operating method]
1) Click the 

[JOG UP]

 or 

[JOG DOWN]

 when “er refresh” is displayed.

2) The display will change to “er refresh?”, and then click the 

[ENTER/YES]

.

The operation is over if “Complete!” is displayed.
After this mode was executed, check the following:
• The data have been cleared.
• Perform the recording and playing to check that the mechanism operates normally.

tm refresh

Mode to clear the “op rec tm” and “op play tm” histories.
These histories serve as approximate indications of when to replace the optical pick-up. If the optical pick-up
has been replaced, perform this operation and clear the history.
[Operating method]
1) Click the 

[JOG UP]

 or 

[JOG DOWN]

 when “tm refresh” is displayed.

2) The display will change to “tm refresh?”, and then click the 

[ENTER/YES]

.

The operation is over if “Complete!” is displayed.
After this mode was executed, check the following:
• The data have been cleared.
• Perform the recording and playing to check that the mechanism operates normally.

op change

Mode to clear cumulative time of “op rec tm” and “op play tm”.
These historical data are used to determine the timing when the optical pick-up is to be replaced. When the
optical pick-up was replaced, perform this operation to clear historical data.
[Operating method]
1) Click the 

[JOG UP]

 or 

[JOG DOWN]

 when “op change” is displayed.

2) The display will change to “op chang?”, and then click the 

[ENTER/YES]

.

The operation is over if “Complete!” is displayed.

spdl change

Mode to clear cumulative time of “spdl rp tm”.
This historical data is used to determine the timing when the spindle motor is to be replaced. When the spindle
motor was replaced, perform this operation to clear historical data.
[Operating method]
1) Click the 

[JOG UP]

 or 

[JOG DOWN]

 when “spdl change” is displayed.

2) The display will change to “spdl chang?”, and then click the 

[ENTER/YES]

.

The operation is over if “Complete!” is displayed.