Filter
Top Products
- 73 -
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
4.12 Speaker/Speaker Phone path
QSC6270 LINE_OUT_L_P/LINE_OUT_R_N ÆTP1_C508, C509Æ Audio Sub System(IC501) Æ TP2_FB507, FB508 Æ
TP3_CN803 1/2, 3/4 PIN(=Main to F_SUB_FPCB Connector) Æ TP4_CN101 1,2 PIN(=F_SUB_FPCB to Main PCB
Connector) Æ TP5_CN102(= Speaker Pad of F_SUB_FPCB)
Connect the phone to network
Equipment and setup call
Setup 1KHz tone out
Can you hear the tone?
END
Yes
No
Change the QSC6270
Change the Main board
Sine wave appears at
TP5_Speaker Pad
Re-Solder Speaker Pad
Change the Speaker
Yes
No
START
Sine wave appears at
TP4_CN101 1,2 PIN
Change the F_SUB FPCB
Yes
No
Sine wave appears at
TP3_CN803 1/2, 3/4 PIN
Re-Connect the CN101
Change the F_SUB FPCB
Yes
No
Sine wave appears at
TP2_FB507, FB508
Change the Main PCB
Yes
No
Sine wave appears at
TP1_C508, C509
Change the IC501
Yes
No