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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.
KDC-MP828/W7531/W7531Y/W8531 /W8531Y/X789/X8529/X889
TEST MODE
2. When entering the test mode, the manufacture code of the Flash ROM (4M) is read and when it is normal, FROMCHK of the 100th terminal (Panel µ-com) repeats Hi � Low � Hi · · ·. If the reading is abnormal, �Low� is output. If the manufacture code is normal, by pressing [ ] key for less than 1 second, the connection checks on all terminal is started. If the connections are normal, the FROMCHK terminal stops the Hi � Low � Hi · · · repeating and outputs �Hi�. If the reading is abnormal, �Low� is output. 3. With all lights turned on and by pressing [AM] key for at least 1 second, the data on the Flash ROM (4M) is initialized. While erasing the data, �Data_Erase....� is displayed. Note : Do not touch any key white this is in progress. When erasing is complete, �Erase_OK!!� is displayed. If �Erase_NG!!!!!!� is displayed, it was not possible to erase the data on the Flash ROM (4M). In this case, pressing [AM] key for at least 1 second again. If it is the same, then there is an abnormality with the Flash ROM. � While in the test mode, and at the same time, PM_DET of the 60th terminal (System µ-com) is H, the following will apply to the EJECT key, regardless of whether a disc is in the unit or not. Panel full OPEN/CLOSE is conducted with a push for less than 1 second. (Protection time : 3 seconds) As far as this item is concerned, eject will be achieved by for at least 1 second push on the EJECT key.
� Clearing backup memory and installer memory data (Clearing E2PROM data)
1. By pressing [ ] (NEXT) key and [ATT] key simultaneously, reset and start the unit. This will start the initialization processes for backup and installer memory data and the error log information of the CD mechanism. 2. When initialization is complete, the following display will be made. Normal completion CD_E2P___: AUDIO_E2P:
� Other
� At Power ON, �CODE_OFF�, �CODE_ON� displays will not be made. � When sourcing STANDBY, by pressing [AUTO] or [TI] key for less than 1 second, GREEN/RED of the key illumination is switched. When doing this, the triangle illumination GREEN/RED is switched along with the key illumination. � When staring up in the test mode, LINE MUTE prohibition time is set to 1 second instead of 10 seconds. � While in the test mode, even when a DC offset error is detected, the detection information will not be written to the E2PROM. � While in the test mode, even after an elapse of pre-set time, the backup memory items will not be written to the E2PROM. � Information Clear mode for Test Mode, backup/installer memory, and CD mechanism error log. In the DC offset error detection information clear mode, DEMO mode operation will not be conducted. Also, in the above mode, the menu of the STANDBY source will not display DEMO ON/OFF switching items.
Abnormal ending 1 : backup/installer memory initialization : NG CD_E2P___: AUDIO_E2P:
Abnormal ending 2 : CD mechanism error log initialization : NG CD_E2P___: AUDIO_E2P:
Abnormal ending 3 : All initialization : NG CD_E2P___: AUDIO_E2P:
3. While in this mode, even after an elapse of a pre-set time, no backup memory items will be written to the E2PROM. 4. This mode is released by resetting. (What was on the last screen will not be retained.)
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