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Complete manual with clear schematic diagrams and printed circuit board layouts of two variants of the headset and the transmitter an old and a new version.
Also shows how the headset and the transmitter is opened and how transmitter and receivers can be adjusted and where to measure.
I had no problems to repair the headset using this service manual.
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Excellent printing quality. A complete and very useful manual with all details.
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This is a great site. I placed my order and by the next am it was available for download. Had some problems with some missing copy on some pages. Once I brought the error to the OMC's attention, the issue was resolved. I'll come back again.
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Mi spiace per non poter scrivere in inglese... ma sono veramente soddisfatto del servizio offerto. Grazie..!!
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The quality of this manual is good. It has all schematics and setup information for both the MDS-B3 and the MDS-B4. The scan quality is quite good, all pages are readable, This service manual also contains scans of the operating instructions from the User manual.
XM-PX3BU/XM-PX3TG
Maintenance of MD pickup
1. Cleaning of pickup lens
(1) Prior to changing the pickup, clean the pickup lens. (2) For cleaning the lens, use the following cotton swab after mearsing it in alcohol. Product No. JCB-B4; Manufacturer;Nippon Cotton Swab
Procedures of changing the MD pickup
Change the MD pickup by referring to "Removing the MD pickup" in the Disassembly method.
2. Confirmation of the service life of laser diode when the service life of the laser diode has been exhausted, the following symptoms will appear.
(1) The RF output (EFM output and eye pattern amplitude) will become lower. (2) The drive current required for light emitting of laser diode will be increased.
Set the pickup to [TEST] mode according to the procedures described in the Adjustment method.
Adjust the laser power 560 W.
Power supply voltage 1.5V
20mV Adjustment
Adjust the disc. Confirm the service life according to the following flow chart: Completion of changing the MD pickup.
Can the laser power adjust under test mode?
NO
Change the pickup
YES
Is the drive current of laser diode 55mA or less?
NO
Change the pickup
Be sure to perform not only adjustment and operation of this system so carefully as not to directly look at the laser beam or touch on the body.
YES
OK.
3. Method of measuring the drive current of laser diode
When the voltage measured at the both side of carbon resistor R301 on the MD servo P.C. board (LVB20008) have become 12.1mV or over, the service life of the laser diode is judged to have been exhausted.
4. About Semi-solid state resistor of pick up
This is adjusted in the maker of pick up . Be careful please not to touch pick up .
2-6
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