Q: Hi everyone, I have a printing issue. Only half the page is being printed, not the top half or bottom half so not suspecting the printer assembly. Its only printing the first quarter of the page in full and the rest of the page is entirely blank. Any suggestions are appreciated in advance.
A: Without seeing the actual print. It could be the print head, battery or even the paper. The diagnosis would be based on what it looks like.
A: Might suggest that the print head could be dirty with paper lint. You start with an alcohol pad and swipe it back and forth then do the same with a soft cloth along the orange plastic film flat bar – not the roller. Let it set open for 5 minutes to insure that it is dry. The print head is on the top part of the paper tray at the upper front edge. Do not rub hard on the orange strip.
A: If you replaced the print head, you need to enter in the resistance that is on the label of the print head.
A: If the paper is wrong, it will do that. There must be a hole in the print paper about 3 inches down and 3 from the left top. If the wrong paper is used it will not detect the beginning of the paper and will give you a paper out error and only print about 4 inches. The paper sensor will also cause this. As for the battery, if it were dead or bad it would not print. If it is not either of those, it is a mainboard issue that needs components replaced.
Q: I have above mentioned product and the problem is 1.6A fuse blowing as soon as I connect to the main power. What could be the problem?
A: It could be that a larger capacity fuse is required, check the manual. Or, you have a short somewhere, start investigating, also plug into a GFCI outlet so it trips first.
A: If you are plugging in to 120v power a 3.0A fuse is required, otherwise if 220v, a 1.6A fuse is correct. If it blows the fuse it is likely that T1 is shorted. The windings can be quick-checked with a multimeter if disconnected from the surrounding components. It should read anything, but a direct short. More than likely this is where you will find the problem. It may have visible evidence or smell like burned varnish.
A: It sounds like you definitely have a short. You’re going to have to crack open the case. I’ll help you as much as I can. The hospital I’m working in now doesn’t have any of those units. So, I can’t mirror you.
Remove and disconnect the various components until you narrow it down. Start by disconnecting the rectifier from the transformer (two red wires) and see if it blows the fuse, yes this may take a few fuses to test. I suggest 1.3 to 1.6A maximum for testing like this. I don’t know what your skill level is so please be careful. Have you disconnected the external probe devices? After that, try removing the power amp tube. The most common failure items are diodes, vacuum tubes, transistors, resistors (usually fail open), and transformers (less often and due mostly to overheating from shorted circuits). Integrated rectifiers are a common failure item. Good hunting.
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