Drive & Rf Circuit Diagram - NAD L55 Service Manual

3. DRIVE & RF CIRCUIT DIAGRAM
Q2M3 is defective.
Spindle rotates in high speed.
TRACKING LOOP SLED LOOP
FOCUS LOOP SPINDLE LOOP
WAVEFORM
2-22
4
1
6
2
1
IC2A2 is defective.
Q2A1, Q2A2 are defective.
No fucus & tracking control.
CD/DVD LD will not be on.
2-23
3