Replacing The Lcd Assembly; Figure 37: Transmitter Disassembly - ABB 266 MODBUS User Manual

Replacing the LCD assembly

The following procedure provides steps to remove and replace the LCD assembly.
WARNING – Bodily injury. When the housing covers are removed and power is still connected, there is a
potential for explosion. Failure to observe this safety information may result in death or severe injury.
Do not remove housing covers in hazardous (classified) areas or explosive environments unless the area is
known to be non-hazardous. Verify an explosive atmosphere is not present before removing the housing covers
when the power is live.
This procedure does not require the transmitter to remain powered up.
1. Disconnect the power supply to the transmitter.
2. Use the instructions in section 5.2.1, Removing the housing cover, to remove the front housing cover, exposing the interior.
3. Use a slotted screwdriver to press the tabs on the LCD fixing locks to release the assembly and remove it (Figure 37).
NOTICE – Property damage. Removing the LCD assembly improperly may damage the assembly. Release
the fixing locks on the LCD assembly before attempting to remove the LCD. Failure to release the locks may
cause the LCD assembly to break apart, damaging the part beyond repair. Damage caused by a failure to
properly remove the assembly is not warrantied.
4. Carefully replace the LCD assembly with a new one. Use caution to avoid bending the HMI connector pins.
5. Replace the front housing cover over the LCD assembly and secure the housing cover (go to section 5.2.2, Securing the
housing cover).
6. Reconnect the power supply to the transmitter and view the HMI screen.
7. To adjust the display contrast, if necessary, go to section 5.8, Adjusting the LCD screen contrast.
48 | 266 MODBUS® multivariable transmitter User manual 2105216 Rev. AB
HMI Co nnecto r 6 Pin
Fixi ng l ocks
Meter L CD assembly
Window co ve r

Figure 37: Transmitter disassembly

5 Service and maintenance