17
SCD-XB790
4-4. SACD (DL) DISC OPERATION CHECK
(• Perform as necessary)
This checking performs the focus jump using a DL disc, which is
a dual-layer HD disc, to verify the stability of the set.
A set of layer 0 most-outside track access (only once)
t
one-second
trace
t
focus jump (layer 0
t
1)
t
one-second trace
t
focus jump
(layer 1
t
0) are repeated 5 times.
Checking Method:
1. After setting the test mode, rotate the
[ AMS ]
dial to
select “91 FJUMP CHECK” and press the
[ AMS ]
dial
to enter.
2. The tray will open automatically, and then set the DL disc.
3. With “DISC IN&JOG ON” displayed, press the
[ AMS ]
dial.
4. The tray will be loaded in automatically, and then the test will
start.
5. During the test, “NOW TEST
iiii
” is displayed.
6. Upon successful completion of the check, “OK!” will be
displayed and the tray will open automatically. (In case of
NG, “NG! ERR FJ-UP” or “NG! ERR FJ-DWN” is displayed)
7. Take the DL disc out and press the
[OPEN/CLOSE ]
button,
and the test mode selection display will be back
4-5. SHIPPING MODE
The repaired set must be initialized, and for this purpose the set
should be set to the shipping mode.
Setting Method:
1. After setting the test mode, rotate the
[ AMS ]
dial to
select “8D SETUP MODE” and press the
[ AMS ]
dial
to enter.
2. “INITIAL OK” is displayed and the test mode selection display
will be back immediately.
“8D 000000000 00” will be displayed, and if the scroll starts in
the left direction, the set initialization has completed
3. Press the
[POWER]
button to turn the power off.
The following setups are established in the shipping mode
1. Initialization of EEPROM (IC903)
• PLAY MODE
CONTINUE
• LAYER SELECT
SACD
• M/2CH SELECT
MULTI
• 2ch SPK MODE
2ch DIRECT
cumulative light emission time of the laser
: Even if the shipment mode setting mentioned above is made, the
disc check threshold value attained in the 3. SET CHECK is not
cleared.
The optical pick-up moves to the home position (most-inside
track)
Description
Error during the time from auto adjustment to TOC
reading, Different type of disc (Such as a DVD disc),
Disc is dirty
Toc Error **** Illegal SACD (Such as a pirated version)
4-6. WAVEFORMS CHECK
BU Electrical Adjustment Mode
The BU electrical adjustment mode is used to check the S curve
waveform, traverse waveform, RF waveform, and CLV jitter. After
a disc is placed on the tray, each time the
[ AMS ]
dial is
pressed, the check mode is switched in order for S curve
waveform
t
traverse waveform
t
RF waveform
t
CLV jitter (for
the CD).
S Curve Check
Connection:
Checking Method:
1. After setting the test mode, rotate the
[ AMS ]
dial to
select “9C. BU DENCHO” and press the
[OPEN/CLOSE ]
button. Place the test disc (PATD-012 or YEDS-18 or SATD-
S5 or SATD-S4) on the tray and close the tray, then press
the
[ AMS ]
dial.
2. At the completion of disc type check, “CD DETECT” will be
displayed (for PATD-012 or YEDS-18).
Note:
For the SATD-S5 or SATD-S4, “SL DETECT” is displayed.
3. Press again the
[ AMS ]
dial, and the S curve waveform
check mode will become active and “S-CURVE MODE” will
be displayed.
4. Connect an oscilloscope to the TP506 (FE) and TP504 (AVC)
on the MAIN board.
5. Check that the level
A
and
B
of waveform on the oscilloscope
satisfy the specification.
Specified Value:
Disc
A
B
SATD-S5 or
SATD-S4
PATD-012 or
0.7 to 1.7 Vp-p
–0.1 to +0.1V
YEDS-18
Note:
For easier observation of this waveform, extend the sweep time
and raise the brightness.
Checking and Connecting Location : See page 19.
MAIN board
TP506 (FE)
TP504 (AVC)
+
–
oscilloscope
A
B
S curve waveform
VC
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