Sam4s ER-5200 Service Manual

7 Special Circuit Descriptions
7-10 SAM4S ER-5200 Series
7-7 Thermal Printer Circuit
The operating method of the thermal printer is similar to the VFD operating method. First, the CPU send a Serial Clock
and Serial Data 384Bits(48 Bytes) to the Thermal Printer. The Serial Data are stored to a Shift Register in the Thermal
Printer. Second, the CPU send a Latch Signal to the Thermal Printer. Then, the Serial Data are stored to the Latch Register.
After that, the CPU send a Strobe Signal to the Thermal Printer. Then, the Printer outputs the Serial Data. The Strobe
Signals (STB1,STB2,STB3) are shorted each other on Main PBA (Same STB4,STB5,STB6). Each Strobe Signal
manage the Printer Dot.
STB No. DOT No. DOTs/STB ER-5200 Strobe Processing
STB1 1 ~ 64 64
STB2 65 ~ 128 64
STB3 129 ~ 192 64
The STB1,STB2 and STB3 are shorted each other on Main PBA.
(192 Dots)
STB4 193 ~ 256 64
STB5 257 ~ 320 64
STB6 321 ~ 384 64
The STB4,STB5 and STB6 are shorted each other on Main PBA.
(192 Dots)
Table 7-2 Printer Head Strobe Processing
Fig
ure
7-
14
The
rma
l
Prin
ter
Blo
ck
Dia
gra
m
CPU
M30800SFP
TPH_CLK
TPH_DATA
THERMAL PRINTER
Printer Line
Latch Register
Shift Register
Strobe Circuit
TPH_LATCH
TPH_STB2
TPH_STB1

Sam4s ER-5200 Specifications

General

Brand	Sam4s
Model	ER-5200
Category	Cash Register
Language	English