SM100 ADJUSTMENT
38
5.3 VOLTAGE CHECKPOINT
There are several voltage checkpoints on the PCB boards. Below are some reference voltage points that are
commonly use.
VOLTAGE POINT VOLTAGE PURPOSE
V
CC
3.3 V Provide voltage for most of the IC
V
TH
24 V Provide voltage mainly to the thermal head
V
BB
3 V Provide backup voltage for the RAM IC
HVcc 5 V
The tolerance of all the voltage is about ± 5% except V
TH
is +2% and -5%
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