faded c/panel

[roho]

I am working on a ir3235-The c/panel has no back light, though the display is barely visible. The touch keys work as well. It's a charge call-wondering if it just the inverter pcb?
Thanks!

[teckat]

I am working on a ir3235-The c/panel has no back light, though the display is barely visible. The touch keys work as well. It's a charge call-wondering if it just the inverter pcb?
Thanks!

stupid question ?? did u check the contrast dial on the control panel to adjust it's brightness ? is the green power light on ??

just a note> if u replace it
There are two possible solutions to fix this problem. There may be an issue with the control panel inverter pcb or the Memory Dimm on the Main Controller. The part numbers are listed below.

Inverter PCB FM3-5744-000
Memory Dimm WA7-5211-000

The LCD Display for the Control Panel was dim. It was determined that the LCD Inverter PCB in the Control Panel was defective. Part number FM3-5744-000 was ordered. The LCD Inverter PCB received has been revised to FM4-6690-010. After installing the new style LCD Inverter PCB into the Control Panel the LCD Display is now completely blank / black.

Solution :
The new style LCD Inverter PCB (Part Number FM4-6690-010) now has a jumper, JP4, on it. Also, there may be one of two different style LCD's in the machine, each with a different style connector to the Inverter PCB. There are two positions for jumper JP4 depending on which LCD you have.

If the LCD Display's connector plugs into J2 on the LCD Inverter PCB, the jumper for JP4 should be positioned all the way to the left for the LCD Display to work properly. Please refer to the picture below:
Inverter..jpg
If the LCD Display's connector plugs into J3 on the LCD Inverter PCB, the jumper for JP4 should be positioned all the way to the right for the LCD Display to work properly. Please refer to the picture below.
2Inverter..jpg

or>
When the Main Unit is turned on, either a blank LCD display occurs or no power occurs. In some cases, the control panel buttons work, but the display is blank.

Solution :
If the Main Controller "registered value" ID does not match the REAL TIME CLOCK (RTC) ID, the Main Controller Malfunctions; preventing the LCD display from powering up or no power to unit. By shorting JP1 on the Main Controller it will clear the RTC "registered value", to correct the ID between the Main Controller and RTC Circuit.

Procedure:
1. Turn OFF the Main Unit.
2. Either unplug the power cord from the wall.
3. Remove the rear cover of the Main Unit.
4. Below the left leg of the Battery, jump JP1 for 3-5 seconds.
5. Plug in the power cord and turn on the Main Unit.
6. Verify that the Main Unit powers ON and that the LCD display works.
7. Re-install the rear cover.

pic..JPG

[charm5496]

The inverter board is a known issue with this model and will give you the display issues that you have.