Samsung FACSIMILE SF40 Service Manual page 31

3. TPH (Thermal Print Head)
The TPH consists of shift registers, buffers, drivers, and print resistors.
Below is the circuit diagram of the thermal print head, analog with the timing diagram.
24V
STBO
STB1
STB2
STB3
S.l SHIFT REGISTER
CLK
[Fig. 8]
Sl
LATCH
STBO 4 —
STB1 oe
STB2 ans ts: il
[Fig. 9]
|
4
:
:
|