Tally T6090, Maintenace Manual

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Chapter 1: Electronic Hardware Architecture, Performance & Specifications
1–1
Technical Overview
The T6090 is a medium speed, line impact dot matrix printer. It has a maximum speed of 900
lines per minute in uppercase draft text mode. The T6090 is designed for long term opera-
tions, supporting a workload of 160,000 pages per month with minimal maintenance.
T6090 Electronic Hardware Architecture
The electronic design of the T6090 is implemented in two basic modules. These are the Engine
Control and the Personality Module.
Engine Control Module
The primary components of the Engine Control Module are:
• Control Processor – Intel 87C196KB
• Shuttle Processor– Philips/Signetics 87C750
• Sensor Inputs
• Hammer/Motor logic and drive
• EEPROM – X24C08
Control Processor
• 12.288 MHz clock
• High speed outputs for driving the paper motor and hammer firing
• High speed inputs for synchronizing timing of the shuule position
• 8 channel 10 bit Analog to Digital Converter for sensor readings (paper out, paper
motion, shuttle motion, ribbon motion, platen gap, hammer current, power supply
voltage, ambient temperature)
• Serial channel for communication (19.2K bps) with Main CPU
• Port control of Shuttle/Ribbon microcontroller
• Port control of control panel, ribbon clock, and hammer loading
Sensor Inputs
• Paper motion sensor – optical
• Paper out sensor – optical
• Platen gap sensor – optical
• Shuttle motion/capture sensor – optical
• Ambient temperature – thermistor
• Power supply voltage – resistor divider
Shuttle Processor
• 12.288 MHz clock
• Drives stepping phases to the Shuttle and Ribbon motors