Test Mode - Sharp CD-C1W Service Manual

CD-C1W,CP-C1W

TEST MODE

• Setting the test mode
Any one of test mode can be set by pressing several keys as follows.
Hold down the EQ and CD buttons, and press the POWER switch.
• TEST mode
Function — CD test mode
Setting of TEST mode
Indication of CD TEST mode (Fig. 14-1)
OPEN/CLOSE operation is manual operation.
The pickup can be moved by using the (
When the track-
<MEMORY>
ing servo is acti-
key input
vated, playback
will begin at the
current position.
TOC. IL is performed, and the ordinary PLAY is performed.
<PLAY> key input
If the following key is pressed during PLAY, it is possible
to specify directly any Track No.
<Disc Number 1> key: Track 4
<Disc Number 2> key: Track 9
<Disc Number 3> key: Track 15
Note:
Only in STOP state it is possible to slide the pickup with the
( ) or ( ) key.
VOL. --- Last memory
BAL. --- CENTER
R.GEQ. --- FLAT
X-BAS --- OFF
Canceling method - POWER OFF
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. 14-2)
2. Tracking offset (Fig. 14-3)
3. E/F balance (tracking error balance) (Fig. 14-4)
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 16 FD
0.1s
0.50 V
IC1 7 TE
Figure 14-2
200 ms
1V/diV
IC 1 15
TO
200 ms
1V/diV
IC 1 7
TE
Figure 14-4
All manuals and user guides at all-guides.com
TEST: CD operation test
IL is not performed.
) or ( ) key.
Press the <MEMORY>
The pickup
STOP button.
willreturn to key input
the STOP
position.
FOCUS
OFF-SET
ADJUST
TRACKING
OFF-SET
1 ADJUST
2
TRACKING/
ERROR
BARANCE
1 ADJUST
2
– 14 –
When the track-
<STOP>
ing servo is acti- key input
vated, playback
will begin at the
current position.
Press <STOP> key.
G9 G10
G2
G3 G7
G3 G5
G1 G2 G4
G10
G1~G8
S21 S20
S19 S18
S17
S36
S14
S40
S34
S16 S15 S12
S13
S31
S10
S9 S8 S29
S27
S4 S3
S6 S5
S7
S1
S2
Figure 14 -1
10ms
0.50 V
IC1 16 FD
10ms
0.50 V
IC1 7 TE
Figure 14-3
The pickup nor-
mally returns to
the STOP posi-
tion.
Stop
G9 G6 G5 G4
G8
G6 G7 G8
G9
S41
S39
S37
S35
S33
S38
S32
S30
S28
S26
S25 S24
S23
S22
Enlarged
View
TRACKING
OFF-SET
ADJUST
1
2