Sony UP-890MD - 5-6. Thermal Head Section

5-6. THERMAL HEAD SECTION
The thermal head of this unit comprise 1-line of 1024 dots (64 bits X 16) and
prints out the screen vertically.
5-6-1. Configuration
There are sixteen sets of the assemblise shown below. (The DATA inputs are
DATAI to 16. The other terminals are common.)
Resistor section. Vu
ere
eee
oe
e-eee-
eee
Output Stage transistor section
Latch section
Shift register section
Fig.5-8. Head Internal Circuit Configuration
5-6-2. Timing Chart
Print data (64 bits)
ST8 iH
Head heat generation period
OR
Bg, tg ae eee
“H” while the power is on
Fig.5-9. Timing Chart