Excellent printing quality.
A complete and very usefull service manual with all details.
GREAT SERVICE AT VERY LOW PRICE!
Text excerpt from page 23 (click to view)
P 37-1101/5 TXT, T 51-1101/5 TXT, T 55-1101/5 TXT
ENTERING THE SERVICE MODE: Press the "MENU" button to switch to the "PICTURE" menu, then enter the digits "8 5 0 0" in this menu (this entry is not visible). Exit the Service Mode with the "0" button. When exiting the Service Mode, the software version is briefly indicated and changes will be stored automatically.