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Model
SCD-XE670
Pages
87
Size
6.12 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
scd-xe670.pdf
Date

Sony SCD-XE670 Service Manual ▷ View online

SCD-XE670
11
3-6.
BASE  UNIT (DVBU6A)
1
floating screw (DIA. 12) 
2
– BOTTOM VIEW –
3
base unit (DVBU6A)
base unit (DVBU6A)
cam (66)
12
SCD-XE670
SECTION  4
TEST  MODE
Test Mode Command List
The contents of test mode are as follows.
Note:
Wrong operation in the test mode causes a trouble, thus requiring extreme care.
LINE command (1X): Use mainly for a manufacturing line.
No.
Name
Description
Remarks
05
DSP MON1
XUGF, XPCK, C2PO outputted from IC509 (CD DSP)
Not used for the servicing
06
DSP MON2
MNT0, MNT1, MNT2, MNT3 outputted from IC509 (CD DSP)
Not used for the servicing
07
DSP MON3
RFCK, XPCK, XROF, GTOP outputted from IC509 (CD DSP)
Electrical measurement,
CD CLV jitter measurement
STANDARD command (1X): Use when the servo is applied by manual operation.
No.
Name
Description
Remarks
12
LD ON/OFF
The laser diode is turned on or off
On or off are switched alternately
13
SPIN ON/OFF
The spindle motor is rotated with the regulated voltage
On or off are switched alternately
14
FSRV ON/OFF
The focus servo is turned on or off
On or off are switched alternately
15
TSRV ON/OFF
The tracking servo is turned on or off
On or off are switched alternately
16
CLV ON/OFF
The spindle SLV servo is turned on or off
On or off are switched alternately
Focus and tracking servos must be already turned on
17
SSRV ON/OFF
The sled servo is turned on or off
On or off are switched alternately
Focus, tracking and spindle servos must be already turned on
18
ALL SRV ON
All servos are turned on
19
ALL SRV OFF
All servos are turned off
Stop command in the test mode
This set automatically executes self-diagnosis and various checks
by entering the test mode.
Note:
 This set automatically makes various adjustments according to the
type of disc, thereby not requiring adjustment of the set when parts
were replaced. However, be sure to execute 4-1. IC AND FLUO-
RESCENT DISPLAY TUBE CHECK, 4-2. AUTO CHECK and 4-
7. WAVEFORMS CHECK.
Disc for Test Mode
Various checks of this set require the following discs.
Model
Type 
*
1
Category
Application
MODEL
SATD-S5
12 cm disc
Adjusted value check,
(J-2501-215-A) SL
Reference disc
Operation check,
SATD-S4
Optical waveform check
(J-2501-184-A)
Not specified
DL
12 cm disc
Operation check
PATD-012
Adjusted value check,
(4-225-203-01)
CD
12 cm disc
Operation check,
YEDS-18
Reference disc
Optical waveform check
(3-702-101-01)
Not specified
HYBRID 12 cm disc
Operation check
*1 SL: Single Layer
DL: Dual Layer
Setting Method of Test Mode
Turn the 
[POWER]
 switch on while pressing the 
[        AMS        ]
dial and the 
[MENU]
 button. Release the 
[MENU]
 button and the
[        AMS        ]
 dial in this order when “Test Mode Menu” is
displayed on the fluorescent indicator tube. (If the 
[        AMS         ]
dial is released first, the test mode becomes active but “Test Mode
Menu” is not displayed)
Releasing Method of Test Mode
To release the test mode, turn the 
[POWER]
 switch off.
Selection/Entry of Test Mode
To select and enter the “Test Mode Menu”, operate as follows.
1. Rotate the 
[        AMS        ]
 dial to select the menu, and press
the 
[        AMS        ]
 dial to enter.
2. The test is switched on or off alternately each time the
[        AMS        ]
 dial is pressed.
3. To return to the previous step, rotate the 
[        AMS        ]
 dial
to select the desired item, and press the 
[        AMS        ]
 dial
to enter.
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13
SCD-XE670
FOCUS command (2X): Focus related. (All servos must be already turned on (except command 21))
No.
Name
Description
Remarks
21
FSRCH ON/OFF
The continuous vertical motion of the optical pick-up lens is turned on or
Avoid a long-time use
off
22
F-BIAS UP
Increase focus bias
Focus bias value
23
F-BIAS DOWN
Decrease focus bias
Focus bias value
24
ADJ FCSBIAS
The focus bias is adjusted automatically
Both + and - directions are searched to search for best jitter point
25
FGAIN UP/DW
The focus servo gain is switched between normal and down
Normal or down are switched alternately
26
FJMP UP/DWN
Focus jump is executed
Valid only for DL
UP: layer 0
t1, DOWN: layer 1t0
27
FOCUS AGC
The focus servo gain is adjusted automatically
28
DISP FBdata
The focus bias adjusted value is displayed
Hexadecimal display 9 bit data
Note:
On or off and up or down are switched alternately
OFFSET (PI, FE, TE) command (3X): Adjusts the offset of PI, FE and TE signals.
No.
Name
Description
Remarks
31
PI/FE OFSET
Adjusts the offset of PI, FE and TE signals
TE offset adjustment is executed for the CD
This adjustment must be executed after 61 DISC DETECT
only
TRACKING command (4X): Tracking servo related.
No.
Name
Description
Remarks
41
TGAIN NM/UP
The tracking servo gain is switched between normal and up
Normal or up are switched alternately
44
ADJ TRK DSP
The traverse AGC and E-F balance adjustment is performed
45
TRACKING AGC
The tracking servo gain is adjusted automatically
SEARCH command (5X): Track search related. (Nos. 51 through 53 are not used for the servicing.)
No.
Name
Description
Remarks
51
1-TRCK JUMP
One-track jump is performed
52
M-TRCK MOVE
M-track movement is performed
53
FINE SEARCH
Fine search is performed
DISC DETECT command (6X): Disc type check related.
No.
Name
Description
Remarks
61
DISC DETECT
Disc type check is executed
Refer to how to apply servo by manual
Display after judgment
operation (page 14)
DSKMOD CD: Judged as CD
DSKMOD SL: Judged as SACD (SL)
DSKMOD DL: Judged as SACD (DL)
DSKMOD HLHD: Judged as HYBRID HD
DSKMOD CDRW: Judged as CD-RW
62
SetDiscMode
Enter disc type    CD setting
CD forced setting
63
Enter disc type    SL setting
SL forced setting
64
Enter disc type    DD setting
DD forced setting
65
Enter disc type    HYBRID HD setting
HD forced setting
66
Enter disc type    HYBRID CD setting
CD forced setting
6F
Download
Not used for the servicing
14
SCD-XE670
TOOLS command (8X): Performs aging, reads adjusting parameters, etc.
No.
Name
Description
Remarks
81
VERSION
Firmware version is displayed
Example: Ver 1.00
83
TRAY AGING
Tray open-close aging is performed
Number of times and eccentricity
Not used for the servicing
measurement   Not used in this set.
84
JITTER
Jitter measurement
Not used for the servicing
85
ERROR RATE
Error rate measurement
Error rate
CD: C1, C2
Not used for the servicing
SACD: PO, PI1, PI2
86
ALL SRV ON
Apply all servos
Use when applying the servo by
Full automatic measurement including PI, FE and TE offset adjustment is
manual operation
performed
Refer to STANDARD command (page 12)
87
DISP ADJ DT
Automatic adjusting parameters are displayed
Refer to auto check items  (page 17)
The offset adjusted values are scroll-displayed in order of RF, VC, FE and
TE
Refer to auto check items  (page 17)
8A
FL TEST
Not used for the servicing
8d
Set Up Init
Set to factory shipping mode
Set when repair completed
PLAY, REPEAT, DIGIFIL, etc. are initialized
Refer to 4-6. SHIPPING MODE (page 21)
8F
49 TRCK JIT
Used for jitter measurement of 49th music on SACD-S4
For manufacturing line
Not used for the servicing
QA command (9X)
No.
Name
Description
Remarks
91
F.JMP CHECK
Not used for the servicing
92
SET CHECK
The set is checked
Refer to 4-2. AUTO CHECK (page 17)
93
WATER MARK
Not used for the servicing
94
SET AGING
The set aging is performed
Refer to 4-5. AGING MODE (page 21)
Repeat by the specified number of times or until an error occurred
95
DISP ERROR
The content of error recorded to the set is read and displayed
Refer to Error Display list (page 22)
(Error recording) Only one item is recorded
96
D-OUT OnOff
Digital out of CD is turned on or off
Not used in this set.
98
APDD JITTER
Not used for the servicing
9C
BU DENCHO
The content of error recorded to the set is read, and then the S curve
Refer to 4-7.WAVEFORMS CHECK
waveform, traverse waveform, and RF waveform can be checked
(page 23)
successively
9D
P-ON HOUR
Approximate cumulative power supplying time is displayed
In unit of 1 hour
(Initialized by 8d command)
9E
RFD OUT
RFD output is turned on or off
Not used for the servicing
SACD jitter measuring mode
How to Apply Servo by Manual Operation
In analyzing failures of the set, the servo may be applied by manual operation. To apply servo in the test mode, use the following method.
1. After setting the test mode, rotate the 
[        AMS        ]
 dial to select a command, and press the 
[        AMS        ]
 dial to enter.
2. “61 DISC DETECT” (Disc type check)
t“86 ALL SRV ON”  (All servos on + auto adjustment)
3. If applying servo while checking the condition one by one, “61 DISC DETECT” (Disc type check)
t“31 PI/FE OFSET” (Offset
automatic adjustment)
t“14 FSRV ON/OFF” (Focus servo on)t“16 CLV ON/OFF” (CLV servo on)t“44 ADJ TRK DSP ” (E-F
balance adjustment)
t“15 TSRV ON/OFF” (Tracking servo on)t“17 SSRV ON/OFF” (Sled servo on)t“24 ADJ FCSBIAS” (Fo-
cus bias adjustment)
t“27 FOCUS AGC” (Focus auto gain adjustment)t“45 TRACKING AGC” (Tracking auto gain adjustment).
Note:
1. On and off are alternately switched in the same command.
2. For a stop, select “19 ALL SRV OFF” and press the 
[        AMS        ]
 dial.
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