Earphone receiving path problem
2
Signwave appear
at pin1 of U303 &U304
Signwave appear
at R413 and R414?
Yes
Yes
No
No
Earphone sending path problem
3
Level of pin4 at CON402
is more than 2.0V
Level of C266 is
About a few tens
or hundreds mVAC?
Re-solder
R412, R415
Re-solder
C266
Does it work well?
Re-download
software
Does it work well?
4
Replace QSC
No
No
Yes
Yes
Yes
Yes
No
No
Change main board
Check the condition of U303&304
If problem, replace the
U303&304
Level of pin6 of
U303&U304 is Low?
(High: FM Mode)
Yes
No
Re-download S/W
Signwave appear at
pin2 and 3 of CON402?
Check the receiving path from U303&304 to CON402
4
Yes
No
Z3X-BOX.COM
Summary of Contents for LG-UD6100
Page 25: ...Circuit Diagram Z 3 X B O X C O M ...
Page 40: ...Test Points Circuit Diagram 4 3 5 UIM Trouble CON301 3 0V 3 2 1 Z 3 X B O X C O M ...
Page 46: ...Test points Circuit Diagram 4 3 8 MIC Trouble R371 C327 M301 MIC Z 3 X B O X C O M ...
Page 55: ...BACK_END_CLOCK M_CLOCK P_CLOCK VS DATA 0 Camera Locking Error Z 3 X B O X C O M ...
Page 62: ...Z 3 X B O X C O M 0 Ohm Pad 0 Ohm Pad DNI DNI ...
Page 63: ...Z 3 X B O X C O M 0 Ohm Pad 0 Ohm Pad DNI DNI ...
Page 64: ...Z 3 X B O X C O M ...
Page 65: ...Z 3 X B O X C O M ...
Page 66: ...Z 3 X B O X C O M ...