LG / GOLDSTAR RC-185
Manual de Servicio

VDR ELECTRICAL TROUBLESHOOTING GUIDE

No 3.3V

No 2.5V

Is the Vcc(3.8V) sup- NO plied to IC153 pin 1?
YES

Check or Replace the D127

Is the Vcc(13.5V) sup- NO plied to D156 anode?
YES

Check or Replace the D156

Is the IC153 pin4 � H�?
YES

NO

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

Is the IC154 pin4 �H�?
YES

NO

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

Check or Replace the IC153

Check or Replace the IC154

No 12VL

No 5VL

Is the Vcc(13.5V) sup- NO plied to IC155 pin 1?
YES

Check or Replace the D124

Is the Vcc(5.5V) sup- NO plied to IC156 pin 1?
YES

Check or Replace the D128

Is the IC155 pin4 �H�?
YES

NO

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

Is the IC156 pin4 �H�?
YES

NO

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

Check or Replace the IC155

Check or Replace the IC156

3-68