Sony SCD-XA9000ES Service Manual page 22

SCD-XA9000ES
4-3. SET CHECK (AUTOMATIC VARIOUS MEASUREMENTS)
The operational stability of the set is checked. The check and OK/NG judgment are performed automatically.
Note: In the set check using the CD, besides a checking, the MIRR time used for the disc check is measured every optical pick-up, and from the measured
result, the threshold value is calculated and it is stored in the EEPROM (IC903) on the MAIN board. Accordingly, if a combination of optical pick-
up and EEPROM is changed (for example, the optical pick-up or MAIN board is replaced), be sure to perform the set check using the following CD.
As the data stored in the EEPROM are overwritten every set check, retry if failed. For the set check using the SACD, only checking is made.
92. SET CHECK
CD and SACD (SL) Disc Operation Check
Checking method:
1. After setting the test mode, rotate the
2. Upon display of "AUTO CHECK SP?", further press the
3. The tray will open automatically, and then set the test disc*1 of CD or SACD.
4. With the "DISC IN&JOG ON" displayed, press the
5. "SPEC OK!" will be displayed if the measured result is within the specification. Faulty item name and the measured result will be
displayed if any measured item is NG.
6. After that, "AUTO CHECK SP?" will be again displayed, and then rotate the
[ AMS ]
press the
l L
the test disc out.
*1 Use PATD-012 or YEDS-18 for CD, and SATD-S5 or SATD-S4 for SACD (SL). Using another disc will result in a checking failure.
Measured Items:
Items
RF/VC/FE/TE (ORG)
RF/VC/FE/TE (ADJ)
PI/TRVS PP (ORG/ADJ)
PIOR/CCR/TRCR
FOCUS/TRK GAIN
FBIAS/TRVSC/TRCR2/CFR
PSP AMPLITUDE
1-LAST TRK SEEK (msec)
ERROR RATE
22
AUTO CHECK SP?
AUTO CHECK?
DISP RESULT S?
DISP RESULT F?
CHECH END?
[ AMS ]
l L
[
l
dial, and the test mode selection display will be back, and then press the
Offset values before RF (PI), VC, FE, TE signal offset adjustment
RF (8 bit data in hex notation)
VC, FE, TE (9 bit data in hex notation)
Offset values after RF (PI), VC, FE, TE signal offset adjustment
(Less than ORG value if offset correction is normal)
RF (8 bit data in hex notation)
VC, FE, TE (9 bit data in hex notation)
PI (ORG): PI value at disc type check (decimal data)
PI (ADJ): PI value after PI offset adjustment
(read value at microcomputer A/D) (decimal data)
TRVS PP (ORG): Traverse level before level correction (AGC)
(decimal data)
TRVS PP (ADJ):Traverse level after level correction (AGC)
(decimal data)
PIOR: Set value of PI offset coarse adjusting register
CCR: Set value of FE offset coarse adjusting register
TRCR: Set value of TE offset coarse adjusting register
Auto gain adjusted values of focus and tracking servos
(8 bit data in hex notation)
FBIAS: Focus bias set value (9 bit data in hex notation)
TRVSC: Traverse center value (9 bit data in hex notation)
TRCR2: Set value of E-F balance coarse adjusting register
CFR: Set value of traverse level adjusting register
Average seek time from first track to last track of disc
Error rate measurement
For CD: Average value/Maximum value of C1 and C2
For SACD: Average value/Maximum value of PO, PI1 and PI2
The set check is executed to judge OK or NG.
(For the CD, the threshold value is stored in the EEPROM)
The set check of measurement only is executed.
The measured result is displayed via RS-232C.
The measured result is displayed on the fluorescent indicator tube.
The set check is finished.
dial to select "SET CHECK" and press the
[ AMS ]
dial.
l L
AMS ]
dial, and the check will be executed automatically.
L
[ AMS
l
Description
[ AMS ]
l L
]
dial to select "CHECK END?". Further,
L
[OPEN/CLOSE ]
A
Remarks
At offset 0
RF: A0h
VC, FE, TE: 00h
VC offset is not adjusted
(Measurement only)
Also, for SACD, the TE offset is
not measured and adjusted
PI level conversion
Read value × 12.9mV
Traverse level conversion
Read value × 12.9mV
12.9mV=3.3V ÷ 256 (8 bit)
Registers in RF amplifier
TRCR2 adjusts the E-F gain
balance and used for CD only
(Fixed to 06 for SACD)
TRCR2 and CFR are registers in
RF amplifier
SACD only
For the CD, Measure for 7 sec at track
No.5
For the SACD, calculation from 100-
block data at track No.5
dial to enter.
button and take