Keep getting this error coming up, No Disc. All other functions appear to work fine the only other strange behaviour is the power LED seems very dim when red stby just about noticeable in a lit room and green on not noticeable at all in a lit or darkened room, not sure if this is normal or not.
Found SM here:
Followed through some of the troubleshooting that seems relevant and all checks out ok so guessing this is now down to either the 'top hat', magnet, spindle servo motor or laser.
Voltages on the PS b/d all look ok except the amplifier volts seem a little low so does the -24.9v to front control panel, should be -27v(this is for the VFD, Stby + Vol board)
CN901 28v reads 27.2V and -27v reads -24.9v.
CN902 reads 5.06v, 12.01v and 4.77v.
CN903 reads AC1 fluctuates 19.7-19.8v, AC2 fluctuates 17.6-17.7v, again -27 reads -24.9v, BK5 reads 4.78v and On/Off reads 4.66v.
The main filter cap measured 326v when PS b/d disconnected and 324v in stby and 323v when powered on, not sure this seems quite right?
Q101-TIP42C has 3.22v on Pin2 and Q102-2SB772 has 1.8v on Pin2.
The laser does do its back and forth movement for reading the disc and I have cleaned the lens and the spindle motor does spin up though depending on how far up or down the top hat is fitted to the servo has different results.
Too far down the servo spindle and it cannot spin, too high up the spindle and the top hat stays attached to the magnet, magnet too strong?
I have not tried to oil the servo yet!
Any other ideas or tips please.
Found SM here:
Followed through some of the troubleshooting that seems relevant and all checks out ok so guessing this is now down to either the 'top hat', magnet, spindle servo motor or laser.
Voltages on the PS b/d all look ok except the amplifier volts seem a little low so does the -24.9v to front control panel, should be -27v(this is for the VFD, Stby + Vol board)
CN901 28v reads 27.2V and -27v reads -24.9v.
CN902 reads 5.06v, 12.01v and 4.77v.
CN903 reads AC1 fluctuates 19.7-19.8v, AC2 fluctuates 17.6-17.7v, again -27 reads -24.9v, BK5 reads 4.78v and On/Off reads 4.66v.
The main filter cap measured 326v when PS b/d disconnected and 324v in stby and 323v when powered on, not sure this seems quite right?
Q101-TIP42C has 3.22v on Pin2 and Q102-2SB772 has 1.8v on Pin2.
The laser does do its back and forth movement for reading the disc and I have cleaned the lens and the spindle motor does spin up though depending on how far up or down the top hat is fitted to the servo has different results.
Too far down the servo spindle and it cannot spin, too high up the spindle and the top hat stays attached to the magnet, magnet too strong?
I have not tried to oil the servo yet!
Any other ideas or tips please.
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