Cleaning The Lens Of The Dvd Drive - JRC JMR-7230-S3 Instruction Manual

3
Check the attenuation value with the dialog.
The guidelines of attenuation values are as follows.
Transmission section attenuation value:
Normal: -6.9dB to +7.0dB
Performance deterioration: -20.0dB to -7.0dB
Reception section attenuation value:
Normal: -6.9dB to +7.0dB
Performance deterioration: -20.0dB to -7.0dB
• When confirming the attenuation value of the transmitter, after opening the dialog
box, wait for one minute, and then read its value.
• If the attenuation value of the transmitter is -7dB or lesser, or the receiver's
attenuation indicator is -7dB or lesser, it is indicates that performances of the
transmitter/receiver unit are degrading.
In this case, inspection by the specialized service personnel is required. Contact
our dealer, the nearest service representative or JRC sales.

21.4.10 Cleaning the lens of the DVD drive

1
Insert the supplied lens cleaner CD into the DVD drive.
2
Click on the [Menu] button on the left Toolbar.
The menu is displayed.
3
Click [Maintenance] - [Diagnosis] - [DVD Cleaning] from the menu.
Cleaning automatically starts.
The following dialog box appears during cleaning:
21-41 Section 21 Maintenance & Inspection
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