My typewriter seems to be stuck in the erase position, and/or change ink cartridge position. when I bought it there was no ink ribbon cartridge insalled. It was in up position and I installed a ink ribbon cartridge but can not lower it. Is there a code for lowering the cartridge to the typing position? Is it supposed to lower on its own when I close the top cover?Or is something else wrong? I didn't receive a manual when I bought it and if someone knows the code system it would be very helpful. Thanks!