SCD-XE670 - Sony Audio Service Manual (repair manual). Page 17

17

The auto check is performed to check if the set operates stably. Though a checking is made automatically, whether the measured data are
within the specification is evaluated by the service person. The auto check results in NG immediately, if the check itself causes an error.

Setting Method of Auto Check Mode:
1. After setting the test mode, rotate the 

[        AMS        ]

 dial to select “92. SET CHECK” and press the 

[        AMS        ]

 dial to enter.

2. When “SET TEST START” is displayed, rotate the 

[        AMS        ]

 dial clockwise by 2 clicks to select “1. TOTAL CHECK?”

and press the 

[        AMS        ]

 dial to enter.

3. When “10. TOTAL CHECK” is displayed, rotate the 

[        AMS        ]

 dial clockwise by 1 click to select “11. AUTO CHECK?”.

Checking method:
1. Press the 

[OPEN/CLOSE    ]

 button to open the tray and place the test disc *1.  The 

[OPEN/CLOSE    ]

 key is disabled immediately

after setting the test mode. Be sure to initialize the table.

2. Press the 

[        AMS        ]

 dial, and the following check will be performed automatically.

3. Finally, the test disc will be ejected and the auto check will finish.
4. “AUTO CHECK OK” will be displayed at successful completion of auto check.
5. Recheck is enabled if the 

[        AMS        ]

 dial is pressed in step 4. (Also, use this operation when exchanging the test disc)

6. In case of an error during the checking, the check is interrupted automatically and the error is displayed. (Error display example:

“DISC DETECT ERROR”)  After error display, “CONT?STOP (J/S)” is displayed. In this case, if the 

[        AMS        ]

 dial is pressed,

the check where the error occurred is skipped and you can proceed to the next check. Also, 

x

if button is pressed, the check finishes

and “AUTO CHECK NG” is displayed when even one NG item exists.

*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.

Items

Description

Remarks

LOAD IN TIME (msec)

Time until a disc is chucked from the state where loading tray is out

Loading in switch    H

tL

SPIN UP TIME (msec)

Time from spindle kick to PLL lock

Lock signal    L

tH

RF/VC/FE/TE (ORG)

Offset values before RF (PI), VC, FE, TE signal offset adjustment

At offset 0

RF (8 bit data in hex notation)

RF: A0h

VC, FE, TE (9 bit data in hex notation)

VC, FE, TE: 00h

RF/VC/FE/TE (ADJ)

Offset values after RF (PI), VC, FE, TE signal offset adjustment

VC offset is not adjusted

(Less than ORG value if offset correction is normal)

(Measurement only)

RF (8 bit data in hex notation)

Also, for SACD, the TE offset is

VC, FE, TE (9 bit data in hex notation)

not measured and adjusted

PI/TRVS PP (ORG/ADJ)

PI (ORG): PI value at disc type check (decimal data)

PI level conversion

PI (ADJ): PI value after PI offset adjustment

Read value 

×

 12.9mV

(read value at microcomputer A/D) (decimal data)

TRVS PP (ORG): Traverse level before level correction (AGC)

Traverse level conversion

(decimal data)

Read value 

×

 12.9mV

TRVS PP (ADJ):Traverse level after level correction (AGC)

(decimal data)

12.9mV=3.3V 

÷

 256 (8 bit)

PIOR/CCR/TRCR

PIOR: Set value of PI offset coarse adjusting register

Registers in RF amplifier

CCR: Set value of FE offset coarse adjusting register
TRCR: Set value of TE offset coarse adjusting register

FOCUS/TRK GAIN

Auto gain adjusted values of focus and tracking servos

Reference: 30h

(8 bit data in hex notation)

FBIAS/TRVSC/TRCR2/CFR

FBIAS: Focus bias set value (9 bit data in hex notation)

TRCR2 adjusts the E-F gain

TRVSC: Traverse center value (9 bit data in hex notation)

balance and used for CD only

TRCR2: Set value of E-F balance coarse adjusting register

(Fixed to 06 for SACD)

CFR: Set value of traverse level adjusting register

TRCR2 and CFR are registers in
RF amplifier

MIN JITTER AT F.BIAS

Minimum jitter value in focus bias adjustment (CD only)

Correlative with RF jitter

READ TOC TIME (msec)

Time required for TOC reading

PSP AMPLITUDE

SACD only

1/3 SEEK TIME

Seek time between 1/3LBA and 2/3LBA of the disc

LBA: Absolute address

F) AVE/MIN/MAX (msec):

1/3LBA

t2/3LBA    average/minimum/maximum

R) AVE/MIN/MAX (msec):

2/3LBA

t1/3LBA    average/minimum/maximum

1-MAX TRK SEEK

Seek time between most inward track (0LBA) and most outward track max
LBA

F) AVE/MIN/MAX (msec):

most inward

tmost outward    average/minimum/maximum

R) AVE/MIN/MAX (msec):

most outwar

tmost inward    average/minimum/maximum

ERROR RATE

Error rate measurement

Measure for 10 sec at track No.5

For CD: Average value/Maximum value of C1 and C2

For the SACD, 160 block data

For SACD: Average value/Maximum value of PO, PI1 and PI2

except the data under tracking jump

l

L

l

L

l

L

l

L

l

L

l

L

l

L

l

L

A

A