Checking Flow
START
Is the voltage level VBATT
(R446, R442)3.2-4.2V?
Are all LEDs LED400~409
working?
Q400, R410 is working?
Charge or Change Battery and try again
Check the soldering of each R or
replace LEDs not working
Check the condition of Q400, R410.
If problem, Change Q400, R410.
No
No
No
Yes
Yes
Yes
BACKLIGHT WILL
WORK PROPERLY
Check the signal level at
KEY_BACK_EN=high?
Replace MSM
No
Yes
42
Z3X-BOX.COM
Summary of Contents for LG-MC2670
Page 17: ...LG MC26 70 DCN Mode Graph 2 1 2 1763 04MHz DCN384 14 Z 3 X B O X C O M ...
Page 21: ...LG MC2670 Waveform DP101 Pin 5 Graph 2 1 4 c DP101 Pin 8 Graph 2 1 4 b 18 Z 3 X B O X C O M ...
Page 32: ...LG MC2670 Circuit Diagram 29 Z 3 X B O X C O M ...
Page 55: ...LG MC2670 Appendix Z 3 X B O X C O M ...
Page 56: ...Z 3 X B O X C O M ...
Page 58: ...Z 3 X B O X C O M TX Line RX Line Local Line RD2670 ...
Page 59: ...Z 3 X B O X C O M TX Line RX Line MIC Line SPK Line RD2670 ...
Page 60: ...Z 3 X B O X C O M RD2670 ...
Page 61: ...Z 3 X B O X C O M SPK Line MIC Line RD2670 ...
Page 65: ...Description LG Part No Q ty MAIN PCB SPFY0083001 1 2 PCB Z 3 X B O X C O M ...