LG / GOLDSTAR RH167
Manual de Servicio

No 5.0VD
YES

No 3.3V
YES

Is there about 5.3V NO at the IC153 pin 1?
YES

Check 5.3VA on SMPS Board

Is there about 3.8V at NO the IC152 pin1?
YES

Check or Replace the D127

Is there about 4V ~ 5V at the IC153 pin 4?
YES

NO

Check the �PWR CTL H� signal from µ-COM

Is there about 4V~ 5V at the IC152 pin4?
YES

NO

Check the �PWR CTL �H��signal from µ-com

Check the IC153 and Replace

Check the IC152 and Replace

No 2.5V
YES

No SW_5.3VA
YES

Is there about 3V ~ 3.8V NO at the IC151 pin 1?
YES

Check D154 and D127 on SMPS Board

Is the VCC (5.3V) supplied to Q158 Emitor?
YES

NO

Check 5.3VA on SMPS Board

Is there about 4V ~ 5V at the IC151 pin 4?
YES

NO

Check the �PWR CTL H� signal from µ-COM

Is there about 0V NO at R179 and R156?
YES

Check the �STANBY H�signal from µ-COM

Check the IC151 and Replace

Check Q158 and Replace

3-5