5

(3) System diagram

Signals flowing between the control panel and the system board are indicated in the chart below. When the panel processing CPU detects that the control panel is operated, the operational contents are transmitted to the System board through the serial data. The state of the equipment and the messages from the System board are received by the LCD controller and then displayed on the LCD. The LED and buzzers are switched to ON/OFF with the signals from the System control PC board.

System control PC board

Control panel

 

 

 

Power ON/OFF

Reset signals

LCD

controller

Serial data

LED scan signal

LED serial output

Inverter for

backlight

Contrast adjustment

circuit

LCD display

640 x 240 dots

Analog

Touch panel

input

 

 

Decoder

Panel

 

processing

 

CPU

 

 

Hard-key matrix

LED driver

Buzzer ON signal

Buzzer

LED

Fig. 5-403

(4) Data Transmission

 

 

 

 

1/tF

 

 

 

 

1/tF

 

 

 

FRAME

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

240

1

2

240

1

2

240

1

2

LOAD

 

 

 

 

 

 

 

 

 

 

 

 

FRAME

LOAD

CP

D0-D3

CP x(640/4) pulses

Fig. 5-404

e-STUDIO3511/4511 CONTROL PANEL

5 - 10

November 2003 © TOSHIBA TEC

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Image 106
Toshiba 3511, 4511 manual Data Transmission, Load Frame