8.2 RELIABILITY FAULTS:
WRONG OR NO ICONS ON DISPLAY
CHECK AND TEST 1
Step 1
If you verify that the wrong icons or no icons are shown on display or icons are flashing...
DIAGNOSIS 1
CHECK AND TEST 2
Step 1
Unscrew cover of mainboard with a cross-head screwdriver.
Step 2
Check if terminal in PCB area is inserted to final position.
If not, reinsert it to final position.
Step 3
Unscrew hinge cover.
Step 4
Check if terminal in hinge cover is inserted to final position.
If not, reinsert it to final position.
DIAGNOSIS 2
CHECK AND TEST 3
Step 1
Check if wire order in PCB area and hinge cover area are correct or not.
Right picture shows the correct wire order.
DIAGNOSIS 3
PROCEDURE 1
GENERAL PROCEDURES FOR WIRE RECONNECTION.
Step 1
Cut wire off.
Step 2
Peel off the sleeves.
Step 3
Check to ensure proper wire order and connect them.
Step 4
Tin soldering.
Step 5
Cover connection with electrical tape.
PROCEDURE 2
Step 1
Push a 6mm sucker onto display and turn the knob to strengthen suction force.
Step 2
Wrap a belt around knob to make it easier to pull out of display board.
Tips for installing display.
Tip 1
After connecting terminal, please use tape to fasten wires to avoid crushing with cover.
Tip 2
After putting display
into cavity, press edge
until you hear a clicking
sound, this means the
board is pushed into final
position.
Tip 3
Please press all buttons on display board to make sure it works well.
PROCEDURE 3
Step 1
Prize off the cover on door cap.
Step 2
Remove the screws (in total 2).
Step 3
Pull out the plastic.
Step 4
Disconnect the terminal for display panel.
Step 5
Remove tape.
Step 6
Push the display away from the corner.
Reverse steps above
to install display
board.
Follow tips carefully:
Tip 1
Please press all buttons on display board to check if it works well or not. Make sure words and icons are clear.
Tip 2
If not, disassemble it and put tape onto the point indicated by red circle.
PROCEDURE 4
Step 1
Use a slotted driver to prize off from back of cover.
Step 2
Unscrew with 6mm Cross-head screwdriver.
Step 3
Pull down the lamp box.
Step 4
Disconnect the terminals for LED and for control board.
Step 5
Loosen the clips and take off the control panel.
Step 6
Unscrew with 6mm Philips screwdriver and move away the control board.
Reverse steps above to install internal display. Please note below point:
Tip 1
Pay attention to wires while installing the internal display, to avoid damaging with screw.
CHECK AND TEST 4
Step 1
Check if connection and
wire order in display area
are correct or not.
CASE 1: OUTSIDE DISPLAY
CASE 2: INTERNAL DISPLAY
DIAGNOSIS 4
CHECK AND TEST 5
Step 1
Set multimeter to resistance gear.
CASE 1: OUTSIDE DISPLAY
Step 2
Check wire connection from PCB area to hinge cover area.
Step 3
Check wire connection from hinge cover area to display area.
DIAGNOSIS 5
CASE 2: INTERNAL DISPLAY
Step 2
Check wire connection from PCB area to display area.
DIAGNOSIS 5
PROCEDURE 5
Step 1
Unscrew hinge cover.
Step 2
Remove the cover.
Step 3
Disconnect the terminals.
Step 4
Unscrew 3 bolts and remove the top hinge.
Step 5
Remove upper door.
Reverse procedures above to restore hinges and doors, however, please pay attention to below points:
Tip 1
Don’t forget to add washer onto hinge pin.
Tip 2
When installing door onto hinge, please check the alignment between door-stopper and hinge.
Tip 3
Make sure gasket is attached well.
Tip 4
Make sure gaps between doors are even.
CHECK AND TEST 6
PROCEDURE 6
Step 1
Unscrew cover of mainboard with a cross-head screwdriver.
Step 2
Disconnect terminals.
Step 3
Prize off earthing wires.
Step 4
Unscrew the mainboard
Step 5
Prize off the buckle to remove mainboard.
Reverse steps above to install a new mainboard.
CHECK AND TEST 7
GO BACK TO FAULT LIST RELIABILITY