Symptom 3 - No Dvd Disc Detected At Start Up. Cd Pb Ok - Sony DVP-S300 Training Manual

First Generation DVD
The first generation Sony DVD player consisted of two models, the DVP-
S3000 and the DVP-S7000.
Symptom 3: No DVD disc detected at start up. CDs
may PB OK.
Cause: Laser assembly or Spindle motor is at end of its life.
Repair procedure
You will check the DVD RF level and use that to determine if the laser
output is sufficient to play back DVDs.
1. Check the DVD laser output at CN760/pin 1 on the MB board. Al-
though there may not be an eye pattern because the DVD only starts
to play, you should see RF at CN760/pin 1. Normally there is a 1.6Vp-
p eye pattern at CN760/pin 1. The minimum operating RF level is
0.9Vp-p. The CD RF test point is at a different location.
17
2. If the DVD RF level is above 0.9Vp-p, suspect the spindle motor. Even
though the DVD disc spins, replace the spindle motor (P/N = 1-698-
944-11). Often when the spindle motor is bad, the RF eye pattern is
not clear or the waveform squeezes and expands like a musical ac-
cordion before shutting down.