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Circuit diagrams are in PDF, so it cannot include by this window. If you wish to get some details, check the site linked here. Surf the site in "MOSAIC" view. It will make surf easy. http://electronicshelponline.blogspot.com/
Do all documents have this problem? Then I would contact an authorized Sharp repair center.
If there's only one document that does this, it could be a corrupt or very large file that the printer can't handle. Try sending a single page of the document instead of the whole thing.
Isn't the AR-M350U a "Corporate" multifunction device? Then your vendor should be providing warranty support or service contract support for it. Check with the vendor before getting involved with another company.
That is a CRUM communication error. The CRUM is a chip that resides on the toner cartridge that keeps track of the toner usage and resets when a new toner is installed. If you replaced the toner recently it may be corrupt. If you got a refurbidhed toner they may have reprogrammed the CRUM incorrectly. Power supply problems often cause this error so check your outlet to make sure it is withinn the proper voltage range and also that it is not on the same circuit as other devices. Get a "real" surge protector designed for office equipment such as a smartpower. Try changing toners and using genuine supplies.
You might have better luck posting this under Sharp TVs: http://www.fixya.com/support/sharp/standard_televisions
The black lines at the top of the screen are usually an indication of a problem with the vertical output section. It's often bad electrolytic capacitors, the vertical IC, or both.
That's apparently not a US model, so it will be hard to find the values but you could contact Sharp Philippines:
SHARP (PHILS.) CORPORATION [Philippines]
Km.23 West Service Road, South Superhighway, Alabang, Muntinlupa,Metro Manila, Philippines Tel: 63-2-842-1371
Service Center Tel: 63-2-807-4991/4992
Home Page: http://www.sharp.ph/