Cd Section; Cd Error Code Description; Items Adjusted Automatically - Sharp CD-K7000W Service Manual

CD SECTION

• Adjustment
Since this CD system incorporates the following automatic
adjustment functions, readjustment is not needed when
replacing the pickup. Therefore, different PWBs and pickups
can be combined freely.
Each time a disc is changed, these adjustments are
performed automatically. Therefore, playback of each disc
can be performed under optimum conditions.

Items adjusted automatically

(1) Offset adjustment (The offset voltage between the head
amplifier output and the VREF reference voltage is
compensated inside the IC.)
* Focus offset adjustment
* Tracking offset adjustment
(2) Tracking balance adjustment (waveform drawing 15
EFBL)
(3) Gain adjustment (The gain is compensated inside the IC
so that the loop gain at the gain crossover frequency will
be 0dB.)
* Focus gain adjustment
* Tracking gain adjustment
CD-K7000W/C7000W,CP-C7000

CD ERROR CODE DESCRIPTION

Error
[Servo System Error]
0001 Cannot detect Pickup-in SW
0002 DSP access error
[Error during close operation]
Open/Close SW not functioning (Low → High)
0101
Open/Close SW not functioning (High → Low)
0103
[Error during open operation]
Open/Close SW not functioning (Low → High)
0201
Open/Close SW not functioning (High → Low)
0203
[Error during skip operation]
0302 Pickup-in SW is not detected
0306 During Disc 1 search, Open/Close SW or Clamp SW
or Disc SW do not change to low.
Clamp SW not function (Low → High)
0307
Clamp SW not function (High → Low)
0308
T
Stopped
CH1=500mV CH2=200mV
DC 10:1 DC 10:1
T
FDO
1
TE
3
EFBL
2
=Filter= =Offset=
Smoothing : ON CH1 :
BW : FULL
CH2 :
CH3 :
CH4 :
– 15 –
State Code
1999/04/05 20:26:47
CH3=1V
DC 10:1
=Record Length=
0.000V Main : 100K Mode : SINGLE
0.000V Zoom : 2k Type : EDGE CH1
0.00V Delay :
Hold off :
0.00V
Figure 15
500ms/div
(500ms/div)
NORM:20kS/s
CH2
v/DIV
200mV
=Trigger=
0.0ns
0.2us