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The electronic pen position is a detection device that mainly consists of two ultrasonic sensors (Ultrasonic Sensor 1 and Ultrasonic
Sensor 2) and one infrared sensor, equipped as shown in the following figure. These sensors receive the infrared signal and ultra-
sonic wave from the electronic pen. When the electronic pen is pressed on the screen, the electronic pen sends the infrared signal
and ultrasonic wave. This infrared signal is received by the infrared sensor and converted from the infrared signal to the electrical
signal with a cycle of 30 msec (Sig.1).
The ultrasonic signals Sig.2 and Sig.3, which are generated at the same time by the electronic pen, are received with the delay time
t1 (t2) in proportion to the distance d1 (d2) from the electronic pen to the ultrasonic sensor 1 (ultrasonic sensor 2) by the ultrasonic
sensor 1 (ultrasonic sensor 2). The elite Panaboard (Electronic Board) calculates the distance d1 (d2) using the delay times t1 and
t2. As a result, the elite Panaboard recognizes the position of the electronic pen. 

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Contents of error are distinguished by the frequency of blinking of red color LED. When an error occurs, the red color LED blinks
several times after the red color LED goes out approx. 1 second. This frequency of blinking (of red color LED) indicates the error
status. The following is the error status table.   

Error

Frequency 

of blinking

Possible Cause

Check Point

Infrared Error

1

The interval of the infrared radiation is
not within limits (30 ms ±10%), and this
phenomenon has been generated con-
tinuously 5 times or more. 

1. Turn off and on the power, then recheck.
2. Check the place where the elite Panaboard is installed. And, avoid

the following places for proper operating.

• Direct sunlight or strong light
• Near the side wall
• Near the ceiling (Placing the top of elite Panaboard near to the

ceiling)

• Near the vents of an air conditioner

3. Replace the battery or Electronic Pen.
4. Confirm TP3 signal on CONTROL Board.
5. Replace or repair the part(s) having the problem or SENSOR Board.

Temperature
Error

3

The thermo sensor, which senses the
ambient temperature, detects 1

°C

(3.9

°F)  or  less  [or  50°C (197°F) or

more].

• The connection between the

SENSOR Board and CONTROL
Board is not correct.

• The ambient temperature is abnor-

mal [1

°C or less (or 50°C or more)].

1. In the normal ambient temperature [1

°C - 50°C (33.8°F - 122°F)], turn

off/on the power, and recheck.

2. Check the connection between connectors CN600 & CN601 on 

SENSOR Board and connector CN300 on CONTROL Board.

3. Check the soldering of IC312 (CPU).
4. Replace or repair the part(s) having the problem, SENSOR Board or

CONTROL Board.

USB Error

4

USB device controller is abnormal.

1. Check the soldering of IC318 (USB device controller) on CONTROL

Board. 

2. Replace or repair the part(s) having the problem or CONTROL Board.

Backup Mem-
ory (EEPROM) 
Error

5

The data in the backup memory is
abnormal.

1. Check the soldering of IC311 (EEPROM) on CONTROL Board. 
2. Check the soldering of IC312 (CPU) on CONTROL Board. 
3. Replace or repair the part(s) having the problem or CONTROL Board.

SRAM Error

6

SRAM access error

1. Check the soldering of IC313 (SRAM) on CONTROL Board. 
2. Replace or repair the part(s) having the problem or CONTROL Board.

RAM Error

7

RAM (CPU internal) access error 

1. Check the soldering of IC312 (CPU) on CONTROL Board. 
2. Replace or repair the part(s) having the problem or CONTROL Board.

ROM Error

8

ROM (CPU internal) access error 

1. Check the soldering of IC312 (CPU) on CONTROL Board. 
2. Replace or repair the part(s) having the problem or CONTROL Board.

27

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Error Message on PC Screen

Possible Cause

Check Point and Countermeasure

elite Panaboard was
disconnected.

Connection problem between the elite
Panaboard and PC

• Connect the cable correctly.
• Check the cable
• Check the connector

The elite Panaboard power is not provided.

Check that the green LED lights.