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TI_Repair_L2.5l_A62_A65_A70_A75_R1.2.pdf Release 1.2
6 LED_ KEYPAD_BACKLIGHT
Fault Symptoms
Customer: GRT:
Keypad BACKLIGHT illumination does not work
Tbd.
LED’s Problems
Check the status of the
battery connector visually
okay
not okay
Level 2 Repair
Exchange
Keypad LED
- check for dry joints
Watch for oxidation and
damaged pads of the LED’S
not okay
Use the diode test
function of a multimeter
to check the status of
the diode. The typical
voltage drop on the
diode is 1.7 V when
testing the diode
function with the
multimeter.
okay
okay
SCRAP has to be
send separately to
WSC
not okay
LED_ KEYPAD_BACKLIGHT
Remove metal dome sheet before replace LED’s Use soldering iron to remove defective component. Avoid
excessive heat! Watch surrounding components! Resolder new component afterwards. The metal dome jip
must be used to place the metal dome sheet.
E-commerce order number: L36
840-L2056-D670
E-commerce order name: LED AMBER
Soldering temperature: 240 - 255°C (For A70 and A75 ~ 360°C Tip temp.)
IRIS Diagnose Code: 22000 Display / Background Illumination
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