Thermal Head Section; Structure - Sony UP-895 Service Manual

4-5. Thermal Head Section

4-5-1. Structure

The thermal head consists of one-line 1280 dots (64 bits x 20). It includes the 20 pairs below.
(The DATA input is ten DATA [20:1], and other terminals are common.)
5V
DR
BEO
STB
DATA[n]
CLK
Internal Circuit Configuration of Thermal Head (One-port)
DATA
CLK
STB
DR
BEO
4-14
R1 R2
D1 D2 D3
D1 D2
D3
Print data (64 data)
64CLK
Goes "H" during print start.
Timing Chart
VH
R3 R64
Output-stage
transistor
Latch section
D64
Shift register
D64
section
Head heat time
UP-895/(E)