Led - Siemens CL75 Service Repair Documentation

Company Confidential
Copyright 2005© Siemens AG

3. LED

Fault Symptoms
Customer:
Keypad illumination does not work
Not okay
Exchange
Keypad LED
LED
Use soldering iron to remove defective component. Avoid excessive heat! Watch surrounding
components! Resolder new component afterwards.
E-commerce order number:
Soldering temperature:
IRIS Diagnose Code:
Service Repair Documentation
Level 2.5 – CL75
LED's Problems
Watch for oxidation and
damaged pads of the LED'S
Check the status of the
LED's visually
Use the diode test
function of a multimeter
to check the status of
Not okay
the diode. The typical
voltage drop on the
diode is 1.7 V when
testing the diode
function with the
multimeter.
Attention: Remove Metal Dome Sheet before!!!
V20810-U6208-D670
240 - 255°C
36000 Keys/Illumination
Page 6 of 12
GRT:
No Support
Not okay
okay
okay
okay
Siemens Com
SCRAP
don´t send
WSC
back to
- Check for dry joints
Level 2 Repair