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Purchased the manual that I was looking for at a great price and could download it easily.. Great service experience and for future purchases I plan to use the site.
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Exactly what was needed to assess the product - excellent value and great service
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A site where discontinualed schematic diagrams and back dated information can be found on discontinued radios tv's and any electronic equipment can be found. Newer manuals either Service and operating manuals. Radio amateurs should find this site a great source for ham radio equipment manuals. I will return to this site should I need information on any electrical equipment. priced easy to download in a PDF format and print pages need to undertake the repair.
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Quality scan of the original. All the detail necessary to troubleshoot, repair and adjust the unit. I'm sure I will be downloading more manuals in the future as the need arises.
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Exactly as described, a Service Manual complete with the schematics and PCB layout delivered in a timely manner. Many thanks for the great service.
MD-MT290H
� Recording/playback operation.
Insert a low reflection disc, and ascertain audio output by normal playback, and then set TEST REC mode. Change MSL from 00H to 80H by the control setting of EEPROM. After completing the operation, return in to 00H. Does the head move down, failing to start record even when the continuous record mode is set after address ? Yes Does the RF waveform appear at TP201 when recording/ Playback is performed. No Does level of pins 69 of IC401 and pin 2 of change depending on record and playback ? Yes Yes No Check voltage of pins 89 and 90 of IC201, pins 17, 18, 20, and 21 of IC601, pins 8 and 9 of CN601. Check whether disc is record-inhibited.
No
Check periphery of IC401 and IC101.
Is RF pattern output from IC201 pin 36, 37 ? Yes Check whether there is any damage in IC101, periphery of laser diode. Check for defects of IC351 head, flexible PWB.
No
Check for soldering failure of IC201 .
Check whether input waveform is observed on the pins 3 and 4 of IC501. Yes
No
Check whether the audio signal line between IC501 and J701 is defective.
Is the output waveform output to the pin 9 of IC501 ? Yes Check the periphery of IC501 and the waveform of the pins 97, 100, 101, 102 of IC201.
No
Check whether the pin 16 of IC501 and the pin 108 of IC201 are in H state.
� 35 �
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