Spindle; Focus Servo - LG LAD-9600 Service Manual

3. SPINDLE

Does spindle rotate
normally?
YES
Continue

4. FOCUS SERVO

Focus on OK?
YES
Continue
NO
Normal spindle
driver power ?
Normal spindle control signal
and hall sensor input?
Normal spindle driver output
from IC301 ?
NO
Normal focus error signal?
Normal focus actuator
driving signal?
Check disc
4-4
NO
YES
NO
YES
NO
NO
YES
NO
YES
Check IC301 pin 43
Check IC301 pin 6 and
CN302 pin 4, 5, 6, 7, 8, 9,
10 (Figure 5)
Check IC301 pin 37, 39,
40, and CN302 pin 1, 2, 3
(Figure 6)
Check IC201 pin 109
(Figure 7)
Check IC301 pin 10, 25, 26,
and CN101 pin 1, 4
(Figure 7)