LG LM-U2350A - Amp Module Troubleshooting; Ic601(Njw1190) Troubleshooting

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IC601(NJW1190) TROUBLESHOOTING
IC601 24PIN VOLTAGE INPUT CHECK
IC601 19,20 SDA, SCA PULSE WAVE
CHECK (VOL UP, DOWN TURN CHECK)
IC601 17.22 PIN WAVE OUTPUT CHECK
IC601 OK
FUNCTION INPUT PORT SIGNAL
CHECK(NJW1190 TROUBLESHOOTING)
SMPS VOLTAGE CHECK CONSULT
IC301 10,8PIN CHECK
IC301 TROUBLESHOOTING
IC601 CHANGE
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
AMP MODULE TROUBLESHOOTING
IC501 9 PIN(AMP-PWR)HIGH CHECK
EXPEND IC TROUBLESHOOTING CONSULT
PROTECTION " HIGH" ➞ SMPS VOLTAGE
AND AMP ON/ OFF STATE CHECK
AMP MODULE CHECK : MOS FET BOTH
ARE READ SHORT ➞ AMP DEAD
AMP MODULE CHANGE
IC305 9 PIN(AMP-PWR) HIGH CHECK
IC701 11 PIN "AMP-ON/OFF" HIGH
CHECK
IC701 12 PIN "PROTECTION" LOW
CHECK
PN702 3 PIN "PROTECTION"CHECK
(HIGH ➞ LOW)
NO
NONO
IC701 3 ,20 & 5 ,18 EACH +65V &-65V
CHECK
SMPS TROUBLESHOOTING CONSULT
YES
NO