Epson TM-T88II Series Bedienerhandbuch Seite 57

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2-18 Mechanisms and Operation Rev. A
In order to simplify maintenance, signal lines such as motors and sensors (except for the thermal
head signals) are all connected to the switch circuit board assembly-B by the leads and
connectors, and switch circuit board assembly-B is connected by FFC to the main circuit board
unit-A. The switch circuit board assembly-B is affixed to the arm coming out of the main frame.
The control panel LEDs and push-button are mounted on switch circuit board assembly-B.
Main Circuit Board Unit-A
The main circuit board unit-A is made up of the following electrical circuits:
CPU and CPU Peripheral Logic Circuits
CPU
RAM
ROM
Gate array
Reset circuit
M-T88 Control Circuits
Thermal head drive circuit
Paper feed motor drive circuit
Auto cutter drive circuit
Detector circuits
Operation Panel Control Circuits
DIP Switch Read Circuit
Malfunction Protection Circuit
Drawer Kick Control Circuit
Figure 2.4.22 Switch circuit board assembly-B external configuration
Display panel
Switch board assembly-B
Push-button
LED
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