Sam4s ER-5200 Service Manual page 54

7 Special Circuit Descriptions
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).
manage the Printer Dot.
STB No.
STB1
STB2
STB3
STB4
STB5
STB6
CPU
M30800SFP
7-10
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DOT No. DOTs/STB
1 ~ 64 64
65 ~ 128 64
129 ~ 192 64
193 ~ 256 64
257 ~ 320 64
321 ~ 384 64
Table 7-2 Printer Head Strobe Processing
TPH_STB1
TPH_STB2
TPH_LATCH
TPH_DATA
TPH_CLK
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ER-5200 Strobe Processing
The STB1,STB2 and STB3 are shorted each other on Main PBA.
(192 Dots)
The STB4,STB5 and STB6 are shorted each other on Main PBA.
(192 Dots)
Printer Line
Strobe Circuit
Latch Register
Shift Register
THERMAL PRINTER
Each Strobe Signal
Fig
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7-
14
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SAM4S ER-5200 Series