Norcent LT3290 Service Manual page 22

32'' LCD TV
5.2 No sound
Check speakers are ok?
Check earphone is normal?
Check Q2 MUTE circuit
Test NJM2199 (U2) PIN 12 PIN
11 output is normal?
Test TPA3100(U1) PIN9 PIN10
PIN11 PIN 12 is normal
OK
CHECK X701 surge is normal?
Check CAS-220/CS (U701) is
normal?
Check SF701 PIN5、4 signal
input is normal?
Check TUNER circuit
OK
NG
OK
OK
OK
OK
OK
OK
OK
Check TPA6110A2 (U600)
Relative circuit is normal?
Check CS4335 (U405) PIN5
PIN 8 output is normal?
NG
Check NJM2199 (U2) PIN8 power
supply is normal?
OK
Check TPA3100(U1) PIN21
NG
power supply is normal?
OK
NG
NG
Check (U401) is normal?
22
Norcent LT3290