37’’ LCD TV Color Monitor Norcent LT3725
23
5.2 No sound
Check SF701 PIN5
、
4 signal
input is normal?
Check TUNER circuit
CHECK X701 surge is normal?
Check CAS-220/CS (U701) is
normal?
Check speakers are ok?
Check earphone is normal?
Check Q2 MUTE circuit
Check TPA6110A2 (U600)
Relative circuit is normal?
Test NJM2199 (U2) PIN 12 PIN
11 output is normal?
Check CS4335 (U405) PIN5
PIN 8 output is normal?
Check NJM2199 (U2) PIN8 power
supply is normal?
OK
OK
NG
OK
OK
OK
OK
OK
OK
OK
NG
NG
NG
Summary of Contents for Norcent LT3725
Page 4: ...37 LCD TV Color Monitor Norcent LT3725 4 1 General Specifications ...
Page 6: ...37 LCD TV Color Monitor Norcent LT3725 6 2 2 Front Panel Control Knobs ...
Page 7: ...37 LCD TV Color Monitor Norcent LT3725 7 2 3 OSD Operations ...
Page 8: ...37 LCD TV Color Monitor Norcent LT3725 8 ...
Page 9: ...37 LCD TV Color Monitor Norcent LT3725 9 ...
Page 10: ...37 LCD TV Color Monitor Norcent LT3725 10 ...
Page 11: ...37 LCD TV Color Monitor Norcent LT3725 11 ...
Page 12: ...37 LCD TV Color Monitor Norcent LT3725 12 ...
Page 13: ...37 LCD TV Color Monitor Norcent LT3725 13 ...
Page 14: ...37 LCD TV Color Monitor Norcent LT3725 14 2 4 How to Connect ...
Page 15: ...37 LCD TV Color Monitor Norcent LT3725 15 ...
Page 19: ...37 LCD TV Color Monitor Norcent LT3725 19 Remove the boards Remove the screws Remarked in red ...
Page 20: ...37 LCD TV Color Monitor Norcent LT3725 20 Remove main frame Remove the screws remarked in red ...
Page 21: ...37 LCD TV Color Monitor Norcent LT3725 21 Remove the bezel Remove the screws remarked in red ...
Page 26: ...37 LCD TV Color Monitor Norcent LT3725 26 7 PCB Layout 7 1 Main Board ...
Page 27: ...37 LCD TV Color Monitor Norcent LT3725 27 ...
Page 28: ...37 LCD TV Color Monitor Norcent LT3725 28 7 2 Power Board ...
Page 29: ...37 LCD TV Color Monitor Norcent LT3725 29 7 3 Key Board ...
Page 30: ...37 LCD TV Color Monitor Norcent LT3725 30 8 Block Diagram 8 1 Main board ...
Page 53: ......
Page 54: ...37 LCD TV Color Monitor Norcent LT3725 54 10 Exploded View ...