What to do if Casio DR-120LB has no print?
If your Casio Cash Register isn't printing, the issue might stem from poor voltage VM. Check if VM equals 11 V±5 % while printing. Another potential cause is a defective motor.
What to do if Casio Cash Register does not work at all?
If your Casio Cash Register isn't working, it could be due to a defective power transformer. Check the secondary voltage of the transformer. Alternatively, a defective LSI could be the cause, in which case you should check the waveforms of each pin.
Why is the display poor on my Casio DR-120LB?
A poor display on your Casio Cash Register could be due to several reasons. It may be caused by a defective LSI or short or open circuits between digit signals and segment signals (check between LSI and display tube). A defective display tube could also be the reason.
What to do if Casio DR-120LB has no display?
If your Casio Cash Register has no display, it could be due to no voltage at VF1 and VF2, so check VF1 and VF2. If that's not the problem, it could be caused by no digit signal or no segment signal, so check the pulse signals from LSI. If VF1, VF2, Digit and Segment signals are OK, then the display tube may be defective.
Main PCB schematic diagram illustrating component connections and layout.
Keyboard PCB schematic showing key matrix and connections.
Slide switch board PCB schematic detailing switch configurations and signals.
Printer pin arrangement diagram showing connections and signal timing.
General| Brand | Casio |
|---|---|
| Model | DR-120LB |
| Category | Cash Register |
| Language | English |
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