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Epson service manual CPU peripheral logic circuits, TM200 Control Circuit

Models: TM200

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TM200 Service Manual

CPU peripheral logic circuits

RAM (128K byte)

RAM is used for temporary storage of the following:

‰Data received from the interface (receive buffer)

‰Pattern data printed by the print head unit (printer buffer)

‰Data used for CPU routines (flags, pointers, etc.)

Flash memory (2M or 8M bits)

A printer control program and character generator data is written into flash memory. The control program controls basic printer operations, and all CPU control is performed in accordance with this program. Another flash memory works as a sub-memory for such items as expanding character generator data.

RS-232C interface specifications

Selection between two signals (pin 6 (DSR) or pin 25 (INIT)) is possible.

TM200 Control Circuit

Thermal head driver circuit

The print head of the receipt printer mechanism is a thermal type print head with 576 dots per line. All print head control is performed via a gate array. A driver is built into the print head, and sending of print signal DATA-IN, which is synchronized with the CLOCK signal, to the driver sets the print/non-print status of each dot. Data is confirmed by latch signal #LATCH. Print time control is performed by #STROBE1 and #STROBE2, while energizing time is controlled by the gate array.

Changes in head temperature causes fluctuation of the resistance value of the thermistor built into the head, which is output as temperature signal THERMISTOR.

Paper feed motor driver circuit

The paper feed motor is constant-current driven by a special-purpose IC. The energizing direction switching signals (PH1,PH2,PH3 and PH4) from the CPU. The special-purpose IC controls the paper feed motor in accordance with these signals using Q1, Q2, Q3, and Q4 signals.

Autocutter driver circuit

The autocutter driver use MOSFET to control DC motor.

Detector circuits

Paper end sensor circuit

The thermal printer mechanism is equipped with a paper end sensor, which is connected via switch circuit board assembly to the main circuit board unit. The paper end signal FP_Sensor is input to the DSP’s port.

Cover open sensor circuit

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Epson service manual CPU peripheral logic circuits, TM200 Control Circuit
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TM200 specifications

The Epson TM200 series represents a significant advancement in the realm of receipt printers, catering to a diverse range of business needs. Known for its reliability, speed, and compact design, the TM200 is engineered specifically to meet the demands of retail, hospitality, and other environments requiring efficient transaction processing.

One of the standout features of the Epson TM200 is its enhanced printing speed, capable of producing receipts at an impressive rate of up to 200 mm per second. This rapid output reduces the time customers spend waiting for their transactions to be completed, thereby increasing throughput during peak business hours. The device employs advanced thermal printing technology, which not only ensures high-quality output but also minimizes the need for ink or toner.

The TM200 series is designed with versatility in mind. It supports multiple connectivity options, including USB, serial, and Ethernet interfaces, allowing for seamless integration into existing systems. Additionally, its compatibility with various operating systems enhances its usability across a wide spectrum of platforms, making it a flexible choice for businesses.

Another notable characteristic of the TM200 is its compact footprint. The printer's design maximizes counter space, making it an ideal solution for environments with limited room. Despite its small size, the TM200 does not compromise on performance, delivering robust features in a sleek form factor.

Built with durability in mind, the Epson TM200 boasts an extended lifespan, significantly reducing the need for frequent replacements. Its intuitive paper load mechanism ensures quick and easy paper changes, further enhancing operational efficiency.

Moreover, the TM200 series utilizes Epson's unique Economode technology, which optimizes power consumption without compromising on performance. This eco-friendly approach not only lowers operational costs but also aligns with sustainability goals pursued by many modern businesses.

In summary, the Epson TM200 series combines high-speed performance, versatile connectivity, compact design, and durability, making it an ideal choice for businesses seeking reliable and efficient receipt printing solutions. Whether placed in a retail store, restaurant, or other commercial environments, the TM200 stands out as a formidable option that meets contemporary business needs with ease and efficiency.