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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.
For non-Secam LL� system sets if their serial number is lower than 30200001: Substract 5 from �AGC� value and adjust �2.AGC� to this value.
4. SCREEN ADJUSTMENT
Enter service mode and press �Yellow� teletext button. Select �SCRN� item. Press Vol + or � button. You will see white horizontal line at the bottom of the screen. Adjust the screen potentiometer to the just visibility level of horizontal line. After adjustment press Vol + or Vol � button to see the picture (The value of �SCRN� item will be �0�).
5. GEOMETRY ADJUSTMENTS
Enter service mode and press �Green� Teletext button. Check that �Y.DLY� value is �1�. �H.POS� is for horizontal position , �V.POS� is for vertical position �V.HEI� is for vertical size, �LNRTY� is for vertical linearity, �S.COR� is for S-correction, �OSD.H� is for OSD Horizontal Position, �OSD.V� is for OSD Vertical Position adjustment.
6. WHITE BALANCE ADJUSTMENTS
Enter the service mode and press �Yellow� teletext button. Select and adjust �G.CUT� to the �64� for 14� sets and �40� for 20� and 21� sets. Adjust �R.CUT� and �B.CUT� for cut off adjustment. Select and adjust �R.DRV� and �B.DRV� for white balance. Change the �G.CUT� value a few unit if white balance could not be adjusted. Exit from service mode. Remark: When �VIDEO� item is selected �NEW�, optimum �SECBL� value (determined by the IC manufacturer) is loaded to EEPROM. Whereas if the black level of SECAM is not suitable, �SECBL� can be adjusted manually by applying a SECAM pattern that includes black sections and changing value of �SECBL� .
7. FEATURE SETUP
TUNER ST.BY AV2 CLR.S SND.S TEXT LANG SHARP&ALPS, PHILIPS, P.SONIC, TEMIC YES : Automatic switch off is active (when there is no signal for 5 min) NO : Automatic switch off is not active (can be used during repair) NO : Single scart YES : Single scart +front AV PAL, PAL/NTSC (SECAM system is automatically detected by TV) BG, I, BG+DK, BG+ LL� (Sound Systems) NON TEXT : Teletext not available DEFAULT : Teletext FASTTEXT : Fasttext A : English, German, French, Italian, Spanish, Portugal, Greek, Turkish, Dutch, Swiss, Danish, Norwagian, Finnish, Slovenian, Polish, Hungary, Russian, Hebrew B : English, German, French, Russian, Polish, Bulgarian, Serbian, Hungarian, Romenian, Slovenian, Macedonian, Croatian, Czech, Slovekian, Albanian, Arabian, Persian, Turkish INT : Video IC uses internal BG Band Pass Filter (default) EXT : Video IC uses external BG Band Pass Filter OLD : Default NEW : Switch once after replacing the Video IC (IC101) or EEPROM IC (Not: If it is switched to �NEW�, AFC adjustment must be done again as described in AFC Adj. Sect.).
BGBPF VIDEO
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