P-touch info mode diagnostic

So I found a service manual for the PT-1900 and it says that it has a "diagnostic mode." With the unit powered off, hold code and k, then press the power, release the power, then release code and K you get into the INFO diagnostic mode, and the display will say "INFO MODE."

Note that it won't go into info mode unless the buffer is empty.


The page from the manual says:


Starting the Inspection Mode
First, press the “ON/OFF” key while pressing the “Code” and “R” keys, and release the “ON/OFF” key, then “Code” and “R” keys so that the RAM is cleared, and the machine performs normally. Then, when the power is OFF, press the “ON/OFF” key while pressing the “Code” and “K” keys and release the “ON/OFF” key, then the “Code” and “K” keys so that the machine goes into the inspection mode.


Once you are in "INFO MODE" and you type the number keys you get:




1 = Info mode (show the country settings and test the display)
2 = Cassette diagnostic (if you push the cassette identification pins with your finger, it will update in real-time)
3 = key (test the keyboard)
4 = cut (test the cutter)
5 = print 1
6 = print 2
7 = motor (runs the motor until you turn it off, best to take out the cassette first or you will waste your p-touch tape)
8 = AD (test the Analog/Digital conversion)

r = motor
m = print head
f = feed and cut

so hit ENTER and it will go into the various modes, when you've cycled through all the options for a given mode, it will go to the next mode.


I find the AD kind of interesting, as it will display the Voltage and Temperature sensors in real time:

VOLT TEMP
BA 8A


for the m=PRINT HEAD, if you then type y, it will cycle through Di,STR,CLK,LAT, w will go to OFF, then e will go to END, then 1 (one) turns the unit off. I have no idea what this means...perhaps it is to test the signals on the print head connector as there are signals on the connector that are named DI, STR, CLK and LAT.



My cool discovery of the day.







Na = Nation and it is a US model, H = Head Rank (I don't know what that means exactly), and Vo = Voltage (o for good, x for not good)



Cassette pins status







I'm using a Panasonic PQLV1 telephone adapter that only puts out 9V, but it seems to work. Probably why the Vo reads X instead of O.



Officially, the PT-1900 requires 9.5V.

I was able to get into the info mode on a PT-1750 and a PT-2300. The PT-1750 had some different options, one being a CG that would display the character roms.