LED and LED driver troubleshooting
Context
The device has two LED drivers that provide current for the keyboard and several LEDs (Charge,Send/
end,menu) . Brightness of backlights can be adjusted manually, and it affects the keypad. Keyboard backlights
and some LEDs can be turned ON/OFF separately but not without switching on the display lights.
RM-505; RM-506
BB Troubleshooting and Manual Tuning Guide
Issue 1 COMPANY CONFIDENTIAL Page 3 –39
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