Denon DCD-315 - Page 16

RS COS 75 a a a a ee a
2. Judgement by checking of changing PU due to Focus Error signal Vre
(check for proper S-surve)
Load the adjustment disc
(CA-1094). (Note 1)
(service mode)
S-curve wave
Press[PLAY]button.
Perform continuous
focus search. (Note 2)
[0.5V/div]
GND
Observe with
oscilloscope
across test point
FE and VC.
[2msec/div]
Record VrEmax data
with maesuring focus
error signal (S-curve)
3 times.
Is VFEmax shown
more than 1.58V?
Is PU lens
cleaned?
Yes
Clean the PU lens.
(Note 3)
Record Vremax data
with measuring VFE
signal 10 times by turn
disc about approx. 90°.
Trouble may exist in PU
abnormality due to focus
error signal (S-curve) VFE.
Execute PU replacement.
Perform checking of
item 3. (Next page)
Note 1: Adjustment disc (CO-76143) VFE = 1.67 V.
Note 2: Press button continually in VFeE measuring.
Note 3: Gently wipe out the lens surface with a little amount of isopropyl
alcohol soaked lens cleaning paper without apply excessive force to the lens.
16