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.
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.
Das Service Manual war von der ersten bis zur letzten Seite sehr informativ und hilfreich. Die Darstellung aller Teile war klar und der Text gut lesbar.
Vielen Dank, das war nicht der letzte Download bei ownner-manuals.com.
Text excerpt from page 40 (click to view)
TROUBLE SHOOTING GUIDE
E-2. PREAMP IN THE PLAYBACK MODE
Is signal from heads fed to pin1 and 3 of P391?
YES NO
Check the DRUM and DECK mechanism
Is ON/OFF5V supplied to pin87 of IC301?
YES
NO
Check the ON/OFF 5V
Is REC(H) from pin79 of IC501 supplied to base of Q206(LOW)?
YES
NO
Check Pattern, IC501 and adjacent circuit
Is V.SW pulse from pin46 of IC501 supplied to pin11 of IC301?
YES
NO
Check SERVO/SYSCON
Is the signal from pin1 and 3 of P391 fed to pin82 or 85 of IC301?
YES
NO
Check P391and IC301
TO LUMINANCE SIGNAL IN THE REC
NOTE : 1) REC(H) : "HIGH" in the REC mode. "LOW" in the EE and PB mode