Sharp CD-C602 Service Manual page 10

CD-C602,CP-C602
CD SECTION
Since this CD system incorporates the following automatic
adjustment function, when the pickup is replaced, it is not
necessary to readjust it.
Since this CD unit does not need adjustment, the combination
of PWB and laser pickup unit is not restricted.
• Automatic adjustment item
1. Focus offset (Fig. 10-1)
2. Tracking offset (Fig. 10-2)
3. E/F balance (tracking error balance) (Fig. 10-3)
4. RF level AGC function (HF level: constant)
5. RF level automatic follow-up of the tracking gain
This automatic adjustment is performed each time a disc is
changed.
Therefore, each disc is played back using the optimal settings.
0.1s
0.50 V
IC1 20 FE
0.1s
0.50 V
IC1 7 TE
Figure 10-1
10ms
0.50 V
IC1 20 FE
10ms
0.50 V
IC1 7 TE
Figure 10-2
200 ms
1V/diV
IC 1 15
TO
200 ms
1V/diV
IC 1 7
TE
Figure 10-3
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FOCUS
OFF-SET
ADJUST
TRACKING
OFF-SET
ADJUST
1
2
Enlarged
View
TRACKING
OFF-SET
ADJUST
1
2
TRACKING/
ERROR
BARANCE
1 ADJUST
2
– 10 –
CD TEST MODE
When the PLAY
pressed at the same time in OFF MODE, the
set will enter CD TEST MODE
↓
IL is not
performed.
"CD TEST" of LCD will light up.
↓
The pickup can be moved by using the (
( ) button.
→
Press PLAY button
↓
LASER ON
Press PLAY button
↓
FOCUS SERVO ON
Press PLAY button
↓
TRACKING ON THE STOP
SERVO OFF PLAY
Display "CD 01 0:00"
Press PLAY button
↓
TRACKING ON THE STOP
SERVO OFF PLAY
Press PLAY button
↓
STOP "CD TEST" will display
Cancel method: POWER OFF
LCD display: After the PLAY or APMS MEMORY button has
been pressed, the track No. and time only will
appear (valid). The other items are optional.
Note: The pickup can be slid using the
while in the stop mode.
ALL CLEAR AND RE-START FUNCTION
When the STOP and POWER buttons are pressed to turn on
the power, the entire internal memory will be cleared and the
mechanism will run from address 0.
All of the tuner presets, APMS, TOC and disc numbers which
were last stored in memory will be cleared, and the tuner,
changer mechanism and all of the other items will be initial-
ized.
and POWER buttons are
) or
or button only