LK202-25-R-VPT Matrix Orbital, LK202-25-R-VPT Datasheet - Page 20

• Manufacturer Part Number: LK202-25-R-VPT
• Description: LCD ALPHA/NUM DISPL 20X2 BK RED
• Manufacturer: Matrix Orbital

Specifications of LK202-25-R-VPT

• Display Mode: Transmissive
• Number Of Digits/alpha: 40
• Outline L X W X H: 116.00mm x 37.00mm x 25.73mm
• Viewing Area: 82.20mm L x 18.20mm W
• Display Format: 20 x 2
• Character Size: 5.55mm H x 3.20mm W
• Character Format: 5 x 7 Dots
• Voltage - Supply: 5VDC
• Dot Size: 0.60mm W x 0.65mm H
• Interface: I²C, RS232, TTL
• Operating Temperature: 0°C ~ 50°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Display Type: -
• Backlight: -

3 Troubleshooting
3.1 The display does not turn on when power is applied.
3.2 The display module is not communicating.
3.3 The display module is communicating, however text cannot
Matrix Orbital
• First, you will want to make sure that you are using the correct power connector. Standard floppy drive
• The next step is to check the power cable which you are using for continuity. If you don’t have an
• The last step will be to check the Power / Data Connector on the LK202-25. If the Power / Data
• First, check the communication cable for continuity. If you don’t have an ohm meter, try using a
• Second, please ensure that the display module is set to communicate on the protocol that you are
• Third, ensure that the host system and display module are both communicating on the same baud rate.
• If you are communicating to the display via I
• Finally, you may reset the display to it’s default settings using the Manual Override Jumper, see
• A common cause may be that the contrast settings have been set to low. The solution to this problem
power cables from your PC power supply may fit on the Power/Data Connector however they do not
have the correct pin out as can be seen in figure 11 on page 6. Matrix Orbital supplies power cable
adapters for connecting to a PC, which can be found in the Accessories Section on page 2.
ohm meter, try using a different power cable, if this does not help try using a different power supply.
Connector has become loose, or you are unable to resolve the issue, please contact Matrix Orbital,
see 14.6 on page 59 for contact information.
different communication cable. If you are using a PC try using a different Com Port.
using, by checking the Protocol Select Jumpers. To change the protocol used by the display module
see Section 2.3 on page 10.
The default baud rate for the display module is 19200 bps.
address. The default slave address for the display module is 0x50.
Section 2.6 on page 13.
is to adjust the contrast settings. The default setting that will work in most environments is 128.
be displayed.
NOTE I
NOTE Optimal contrast settings may vary according to factors such as temperature, view-
ing angle and lighting conditions.
If you are unable to resolve any issue please contact Matrix Orbital. See 14.6 on page 59
for contact information.
2
C communication will always require pull up resistors.
LK202-25
2
C please ensure that the data is being sent to the correct
16