Denon DVD-1600 Service Manual page 16

8.3. Fault diagnosis using new self-diagnosis function
The 5th generation DVD players have the additional new service modes as described above to further reinforce the diagnosis
function.
These new functions are unable to bring sufficient results when they are used alone.
Effective fault diagnosis can be expected when multiple diagnostic methods are properly combined in accordance with the servicing
procedures depending on specific fault status.
* New servicing procedures are now under study to match with the newly developed self-diagnosis functions introduced here.
Details of the new servicing procedures will be informed from time to time.
1. Cumulative operation time display function
For spindle motor and DVD/CD laser, the cumulative operation time is displayed.
When servicing, check the timer display and use it as information for fault diagnosis.
At the time of repair and replacement of these components, make sure to check the operation time and reset the timer after
replacement.
Operation time of the replacement parts (spindle motor and laser) is the valuable information as actual data for future product
quality.
Please save the records and supply information to us.
2. Servo process display function
This additional function is intended to improve efficiency of fault diagnosis, especially for the player´s startup failure, in
combination with the learned value data of ADSC internal RAM.
3. ADSC internal RAM display function
The function is to display the internal RAM data of ADSC servo processor.
The RAM data are the learned values of drive servo, memorizing those concerning focus and tracking, as well as data slice and
equalizer.
* This function is also a newly developed service mode. Its full utilization is still under study.
4. Others
x x x x Increased number of last errors stored
1event o20 events
Focus drive value display function
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