Circuit Flow
Input Level is Appear?
YES
NO
Is Vref 2.85V ?
NO
PAM Circuit is OK
See next page to check
Duplexer & Mobile SW
Or Replace QSC6010
Check U103 Pin2
RF_IN
YES
Check U103 Pin4
V_ref
Check F101 circuit
Check Q101 circuit
NO
Level is
3.2V~4.2V OK?
YES
Check U103 Pin1,8
VCC1,2
Check C206, U201
NO
Output Level
is Appear?
YES
Check U103 Pin7
RF_OUT
Replace U103
Waveform
U103 Pin2 DCN PAM_IN
U103 Pin7 DCN PAM_OUT
SPECTRUM ANALYZER CONDITION
-
RBW : 1MHz,VBW: 1KHz
-
Span : 60MHz
-
Frequency : DCN( 836.52MHz)
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 ...