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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.
[Self-diagnosis Display]
(1) ROM Error Contents: Data of EPROM (IC704) is wrong. Method: � Check the bridge is possible and if find out a repair. � IC704 insert the socket is wrong, if find out a insert again. Display:
[Initialize Method]
Press three buttons [SAVE], [SYSTEM], and [POWER] simultaneously, and the display of fluorescent indicator tube changes to �All Initialize!!�, and restart system.
(2)
Internal RAM Error Contents: Internal RAM of micro computer (IC701) is wrong. Method: � Perform an initialize. (See Initialize Method.) � Replace the IC701, if do not restore of the initialize is not happen another error messages. Display:
(3)
External RAM Error Contents: Internal data of SRAM (IC702) is wrong. Method: � Check the bridge is possible and if find out a repair. � Perform an initialize. (See Initialize Method.) � Replace the IC702, if do not restore of these items the above-mentioned and not happen another error messages. Display:
(4)
DRAM Error Contents: Internal data of DRAM (IC503) is wrong. Method: � Check the bridge is possible and if find out a repair. Display:
(5)
Battery Low Contents: Exhaust the power of lithium battery (BA501). Method: � Replace the BA501. � Check a point of contact, if do not restore of replace the BA501. Display:
� 12 �
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