LG L3200A Service Manual - Page 18

Sound Troble Shooting

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4. SOUND TROBLE SHOOTING NO SOUND OUTPUT POWER CHECK OF MSP3420G(U501) : U522(8V), L501(5V), L505(5V) POWER CHECK OF TPA3004(U502) : C564(18V) CHECK SOUND OF VCR,DVD,PC CHECK OF CONNECTION OF TUNER AND ANTENNA CHECK MSP3420G(U501) I/O SIGNAL YES NO INPUT SIGNAL NO OUTPUT SIGNAL NO INPUT SIGNAL CHECK TPA3004(U502) I/O SIGNAL YES NO OUTPUT SIGNAL CHECK SOUND INPUT =>PC SOUND(J707) =>VIDEO, DVD, DTV SOUND (RED, WHITE OF J701, J702) CHECK THE PERIPHERAL IC OF MSP3420G(U501) CHECK THE PERIPHERAL IC OF MSP3420G(U501) CHECK THE PERIPHERAL IC OF TPA3004(U502) CONNECTOR CHECK NO INPUT SIGNAL CHECK CONNECTION OF SPEAKER ON MONITOR - 18 -

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- 18 -
4. SOUND TROBLE SHOOTING
NO SOUND OUTPUT
CHECK SOUND OF VCR,DVD,PC
CHECK OF CONNECTION OF TUNER AND
ANTENNA
CHECK THE PERIPHERAL IC
OF MSP3420G(U501)
CHECK THE PERIPHERAL IC
OF TPA3004(U502)
CHECK CONNECTION OF SPEAKER ON
MONITOR
CHECK SOUND INPUT
=>PC SOUND(J707)
=>VIDEO, DVD, DTV SOUND
(RED, WHITE OF J701, J702)
CHECK THE PERIPHERAL IC OF
MSP3420G(U501)
CHECK MSP3420G(U501) I/O SIGNAL
CHECK TPA3004(U502) I/O SIGNAL
CONNECTOR CHECK
POWER CHECK OF MSP3420G(U501) : U522(8V), L501(5V), L505(5V)
POWER CHECK OF TPA3004(U502) : C564(18V)
NO OUTPUT SIGNAL
NO OUTPUT SIGNAL
NO INPUT SIGNAL
NO INPUT SIGNAL
NO INPUT SIGNAL
YES
YES