Samsung HT-DM150 - Disc Motor Rotation Troubleshooting; Focus Servo Troubleshooting

Samsung Electronics 9-13
5. Disc Motor Does Not Rotate
6. Focus Servo does not Work
6
5
Disc Motor Does Not Rotate
Check peripheral circuit of MU9
Check peripheral circuit of DU3.
Check DU3
Is Voltage of 0V
developed at
pin15 of DU3
Y
N
Focus Servo does not Work
Are FE(pin42 of RU1)
and PI(pin36 of RU1)
normal?
Check peripheral circuit of DU3 and
RU1
Check peripheral circuit of MU9
Check peripheral circuit of DU3 and
RU1
Check Connection between PCB and
MECHA
N
Y