Nippon DENON DCD-3000 - Confirming Adjustment Values (Continuation); Confirming Focus Gain; Confirming Tracking Gain; Tracking Offset Measurement

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(3} Confirming Procedure
a) Actuate the service program.
b) Check the value of automatic focus gain adjustment.
c) Check the value of auiomatic tracking gain adjustment.
d) Chack for tracking offset.
e) Finish the service program and return the mode to normal operation (turn ON the power switch in normal manner).
f) Check for HF level.
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Confirming Focus Gain
Cantirm the following items,
a) Press| »>1] button. (TRACK No. indication f} F )
b) Press [EXT. INPUT] button. (INDEX No. indication {- )
c) Check for automatic adjustment value.
Automatic adjustment value: 0tM27s ~ 0081s (Test disc: CA-1094)
01mM27s ~ 00M77s (Test disc: CO-76143)
Note: As there may have a possibility of abnormality in pick-up when adjustment value is less than EEm01s or 00m80s (CA-1094),
0076s (CO-76143), execute the confirmation for pick-up according to pick-up replacement standard.
Hf there is no abnormality in pick-up as described in pick-up replacement standard notes, no problem will occur for. disc
Playback even though the automatic adjustment value is less than EEm01s or 00M80s (CA-1094), 0076s (CO-76143).
(8) Confirming Tracking Gain
Confirm the following items.
a) Press [Pi] button. (TRACK No. indication 73)
b) Press [<<] button. {INDEX No. indication 2- )
c) Check for automatic adjustment value.
Automatic adjustment value: 01M27s ~ 0035s (Test disc: CA- 4094) °
01m27s ~ 00M315s (Test disc: CO-76143)
Note: As there may have a possibility of abnormality in pick-up when adjustment value is less than EEm02s or 0034s (CA-1094),
0030s (CO-76143), execute the confirmation for pick-up according to pick-up replacement standard.
If there is no abnormality in pick-up as described in pick-up replacernent standard notes, no problem will occur for disc
playback even though the automatic adjustment value is less than EEm01s or 00m34s (CA-1094), 0030s (CO-76143).
(6) Tracking offset (E/F Balance)
Connection
Oscilloscope
1U-2797/2798-1
Servo Unit
Probe
TP102-@ (TE) © 40 O+
TP102-@ (VC) o O-
Osciloscope Check Step
Lj u (Oscilloscope) 1, Push|&.OPEN/CLOSE| and load dise holder referrence
disk. .
A
2. Push | OPEN/CLOSE] and close disc holder.
O.iwdiv 1-2 5 3. Push |» PLAY} to turn disc. (Displays track number 22 )
ms/div
4. Short (+)(-) of oscilloscope and check the base line.
A-8
ARG. A 20% 5. Confirm that upper and lower amplitude of the waveform is
io symmetric against OV.
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