Diatron ABACUS 4 - Graphic LCD Display and Keyboard Controller with Integrated High Voltagemodule

Abacus 4 Service Manual
12
2.1.11. Graphic LCD Display and Keyboard controller with
integrated High Voltage Module
Display assembly contains the 320×240 dots, 64 color LCD display and the LCD/high voltage
board (HVB).
High Voltage Board (HVB) generates aperture cleaning voltage (150V), and measuring voltage
(50V). The high voltage board is connected to the system through the amplifier board and the
COMB card.
The CFSW digital signal (from the COMB card) controls HVB: logical LOW turns inverter on.
The MVON digital signal (from the COMB card) switches the measuring voltage (50 V) on/off by
O1 opto switch.
Start key and status
LED board
Keypad connector
HVB module
LCD display
connector
HVB to amplifier
board connector
LCD module
Data connector
to COMB board
Grounding
connector