LTPH245 Datasheet, PDF (28/64 Pages) Seiko Instruments Inc – LINE THERMAL PRINTER MECHANISM TECHNICAL REFERENCE

3.5.3 Head Resistance
The head resistance of the printer is classified into three ranks as shown in Table 3-7.
Table 3-7 Head Resistance Ranks
Rank
A
B
C
Head Resistance
178.6 to 195.5 Ω
161.6 to 178.5 Ω
144.5 to 161.5 Ω
* The head resistance ranks are indicated on the label located on the top of the printer.
Sample Label showing the Head Resistance Rank
In this example, the head resistance rank is B.
Figure 3-9 Head Resistance Rank Sample
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