DOWNLOAD Panasonic UB-T781 / UB-T781W / UB-T761 Service Manual ↓ Size: 3.11 MB | Pages: 115 in PDF or view online for FREE

Model
UB-T781 UB-T781W UB-T761
Pages
115
Size
3.11 MB
Type
PDF
Document
Service Manual
Brand
Device
Service Manual / Other / ELECTRONIC BOARD (ELITE PANABOARD)
File
ub-t781-ub-t781w-ub-t761.pdf
Date

Panasonic UB-T781 / UB-T781W / UB-T761 Service Manual ▷ View online

29
UB-T781/T781W/T761
5 Troubleshooting Guide
5.1.
Error Code
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 cor-
rect.
• 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 sen-
sor 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
(to PC)
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.
30
UB-T781/T781W/T761
5.2.
Drawing Problem
31
UB-T781/T781W/T761
5.3.
Error Message on PC Screen
Error Message on PC Screen
Possible Cause
Check Point and Countermeasure
elite Panaboard is not con-
nected. Please check your con-
nection.
Connection problem between the elite Pana-
board and PC
• Connect the cable correctly.
• Check the cable
• Check the connector
The elite  Panaboard power is not turned on. Check that the green LED lights.
The connection with the elite
Panaboard was cut.
The USB cable has been unplugged.
Connect the USB cable correctly.
The elite  Panaboard power is shut down.
Check that the green LED lights.
Defective USB cable
Replace the USB cable, then recheck.
32
UB-T781/T781W/T761
5.4.
Others
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