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SCD-CE775
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Service Manual
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Audio
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Sony SCD-CE775 Service Manual ▷ View online

21
SCD-CE775
5-2. AUTO CHECK (AUTOMATIC VARIOUS MEASUREMENTS)
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?”.
CD and SACD (SL) Disc Operation 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 the machine enters 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.
Check Items:
Items
Description
Remarks
LOAD IN TIME (msec)
Time until a disc is chucked from the state where loading tray is out
Loading in switch    HtL
SPIN UP TIME (msec)
Time from spindle kick to PLL lock
Lock signal    LtH
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):
1/3LBAt2/3LBA    average/minimum/maximum
R) AVE/MIN/MAX (msec):
2/3LBAt1/3LBA    average/minimum/maximum
1/MAX SEEK TIME
Seek time between most inward track (0LBA) and most outward track max
LBA
F) AVE/MIN/MAX (msec):
most inwardtmost outward    average/minimum/maximum
R) AVE/MIN/MAX (msec):
most outwartmost 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
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22
SCD-CE775
Items
Description
Remarks
HENSIN
Eccentricity measurement
For the CD only are measured
Eccentricity (actual eccentric amount) of disc, disc pulley total
• Read by dividing by 10
• 0 may be displayed if eccentricity
is small (10um or less) (Due to
measurement reason)
SPIN DOWN TIME (msec)
Time from spindle brake application to rotation stop
FG (IC901 pin ys) monitoring
LOAD OUT TIME (msec)
Time until loading table comes out from the state where a disc is in chuck
Loading out switch    HtL
Measured Data Reading Method:
To judge the check result, the measured data must be read.
1. When “AUTO CHECK OK” is displayed, rotate the 
[        AMS        ]
 dial clockwise by 2 clicks.
2. When “13. DISP RSLT?” is displayed, press the 
[        AMS        ]
 dial to enter.
3. “PLEASE WAIT” will be displayed and in several seconds, “13. DISP RESULT” will be displayed.
4. Rotate the 
[        AMS        ]
 dial clockwise by 1 click, and the “LOAD IN” will be displayed.
5. Press the 
[        AMS        ]
 dial to enter.
6. Compare the displayed value with the following specified value.
7. Hence, repeat step 4 to 6 (display is variable) and read the measured data respectively.
8. Compare the measured data with the specified value to check for NG item.
Note:
Blank display of measured value means that an error occurred during the checking or no measurement was taken place.
Specified Value:
(1) SACD (Use the test disc SATD-S5 or SATD-S4)
Note:
Measured values in check items are typical ones.
Check items
Specified value
LOAD IN TIME (msec)
:
Not displayed in this set.
SPIN UP TIME (msec)
: 1993
1800 to 2450 msec
PF/VC/FE/TE AVRG (ORG) : 8E, E, 1E2, 12
RF: 91-C8, VC: 1F8-8, FE: 1D1-30, TE: 198-75
PF/VC/FE/TE AVRG (ADJ) : 9D, E, 6, 2
RF: 91-AF, VC : 1F8-8, FE: 1EE-12, TE: 1EA-16
PI/TRVS PP (ORG/ADJ)
: 80, 129, 100, 90
PI ORG: 80-100,  PI ADJ: 80-95, TRVS ORG: 53-118, TRVS ADJ: 45-132
PIOR/CCR/TRCR
: 1B, 31, 1F
No specified value given
FOCUS/TRK GAIN
: 29, 35
FOCUS: 1E-35, TRK: F-40
FBIAS/TRVSC/TRCR2
: 2FE, 14, 6
F.BIAS: 1E2-3A, TRVSC: 1E4-4D    TRCR2: no specified value given
READ TOC TIME (msec)
: 1098
1350 to 2050
PSP AMPLITUDE
: 2387
1450 to 2150
1/3 SEEK TIME
: 2268581, 625121, <_>, 1446850
F) AVE/MIN/MAX (msec)
: 926, 909, 938
AVE: 1150 msec or less, MAX: 1300 msec or less
R) AVE/MIN/MAX (msec)
: 919, 901, 937
AVE: 1150 msec or less, MAX: 1300 msec or less
1/MAX SEEK TIME
: 2268581, 0, <_>, 2268581
F) AVE/MIN/MAX (msec)
: 1846, 1819, 1879
AVE: 2250 msec or less, MAX: 2500 msec or less
R) AVE/MIN/MAX (msec)
: 1837, 1829, 1849
AVE: 2250 msec or less, MAX: 2500 msec or less
ERROR RATE
PO MAX/AVE FRAME
: 0, 0
MAX: 0, AVE: 0
PO MAX/AVE NUM
: 480, 28
MAX: 1500 or less, AVE: 200 or less
PI1 MAX/AVE FRAME
: 0, 0
MAX: 0, AVE: 0
PI1 MAX/AVE NUM
: 320, 11
MAX: 1500 or less, AVE: 200 or less
PI2 MAX/AVE FRAME
: 0, 0
MAX: 0, AVE: 0
PI2 MAX/AVE NUM
: 41, 0
MAX: 1500 or less, AVE: 200 or less
SPIN DOWN TIME (msec)
: 1312
1300 to 2100
FG LEVEL (step)
: 100
90 to 120
LOAD OUT TIME (msec)
: 1934
1300 to 1850
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* Items are not used in the
SATD-S5.
23
SCD-CE775
(2) CD (Use the test disc PATD-012 or YEDS-18)
Note:
Measured values in check items are typical ones.
Check items
Specified value
LOAD IN TIME (msec)
:
Not displayed in this set.
SPIN UP TIME (msec)
: 1354
1300 to 1600
RF/VC/FE/TE AVRG (ORG)
: 8E, D, 1E3, 12
RF: 91-C8, VC: 1F8-8, FE: 1D1-30, TE: 198-75
RF/VC/FE/TE AVRG (ADJ)
: 9C, C, 6, 2
RF: 91-AF, VC: 1F8-8, FE: 1EE-12, TE: 1EA-16
PI/TRVS PP(ORG/ADJ)
: 84, 128, 100, 90
PI ORG: 80-100,  PI ADJ: 80-95, TRVS ORG: 55-155, TRVS-ADJ: 50-120
PIOR/CCR/TRCR
: 1B, 11, 1E
No specified value given
FOCUS/TRK GAIN
: 33, 28
FOCUS: 24-53, TRK: 1A-4E
FBIAS/TRVSC/TRCR2
: 10, 0, 5
F.BIAS: 1D9-2A,  TRVSC: 1E2-19    TRCR2: no specified value given
MIN JITTER AT F.BIAS
: 147
700 or less
READ TOC TIME (msec)
: 827
2500 msec or less
1/3 SEEK TIME
: 311660, 103786, <_>, 207722
F) AVE/MIN/MAX (msec)
: 794, 699, 908
AVE: 1200 msec or less, MAX: 1300 msec or less
R) AVE/MIN/MAX (msec)
: 824, 661, 920
AVE: 1200 msec or less, MAX: 1300 msec or less
1/MAX SEEK TIME
: 311660, 0, <_>, 311660
F) AVE/MIN/MAX (msec)
: 1991, 1964, 2015
AVE: 2200 msec or less, MAX: 2500 msec or less
R) AVE/MIN/MAX (msec)
: 1711, 1701, 1726
AVE: 2200 msec or less, MAX: 2500 msec or less
ERROR RATE
C1 MAX/AVE
: 3, 0
C1  MAX: 15 or less
C2 MAX/AVE
: 0, 0
C2  MAX: 0
HENSHIN RYOU (1/10um)
: 168
800 or less (100 um or less)
SPIN DOWN TIME (msec)
: 1342
450 to 1500
FG LEVEL (step)
: 25
22 to 32
LOAD OUT TIME (msec)
: 1962
1300 to 1850
Note:
RF, VC, FE, TE, FBIAS and TRVSC measured values are hexadecimal data with positive and negative signs. When comparing the measured
value with the specified value, refer to the following.
Hexadecimal (hex) display 9 bit data
FF
011111111 (+255) 
FE
011111110 (+254) 
(+) Side
(-) Side
MAX
01
000000001 (+1) 
00
000000000 (0) 
1FF
111111111 (-1) 
101
100000001 (-255) 
100
100000000 (-256) 
Hexadecimal (hex) display 8 bit data
7F
01111111 (+127) 
7E
01111110 (+126) 
01
00000001 (+1) 
00
00000000 (0) 
02
00000010 (+2) 
FF
11111111 (-1) 
FE
11111110 (-2) 
81
10000001 (-127) 
80
10000000 (-128) 
MIN
0
24
SCD-CE775
5-3. SACD (DL) DISC OPERATION CHECK
(• Perform as necessary)
The stability of the set can be checked by repeating the combined
operation of focus jump (layer 0t1, layer 1t0) and access to
the most inward trackymost outward track by the set number of
times or until an error occurs using the dual layer HD disc, DL
disc.
A set of operation including an access to the layer 0 (most inward
track)tlayer 0 (most outward track)tfocus jump (layer
0t1)tlayer 1 (most outward track)tlayer 1 (most inward
track)tfocus jump (layer 1t0) is carried out repeatedly by the
set number of times.
Checking Method:
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 3 clicks to display “2.
F.JMP CHECK?”.
3. Press the 
[    OPEN/CLOSE]
 button to open the tray, and place
the DL disc.
4. Press the 
[        AMS        ]
 dial to load the tray into the set.
5. “NOW SET UP” will be displayed and the DL disc setup will
start. (It takes about ten and several seconds to set up the disc
as two layers of layer 0 and layer 1 are adjusted)
6. At the completion of setup, “F.JUMP TIMES” will be dis-
played.
7. Rotate the 
[        AMS        ]
 dial clockwise by 5 clicks to display
“5”. (If 5 sets of operation is executed *1)
8. Press the 
[        AMS        ]
 dial, and the check will start.
9. Immediately when the check finished, “UP MAX
ssss”t“UP AVE ssss”t“DW MAX
ssss”t“DW AVE ssss”t“F.JMP OK 
[TIMES]
will be displayed repeatedly. (s denotes the measured value
in msec)
UP MAX: Max time required for layer 0 (most inward
track)tlayer 0 (most outward track)tfocus jump
(layer 0t1)
UP AVE:
Average time required for layer 0 (most inward
track)tlayer 0 (most outward track)tfocus jump
(layer 0t1)
DW MAX: Max time required for layer 1 (most outward
track)tlayer 1 (most inward track)tfocus jump
(layer 1t0)
DW AVE: Average time required for layer 1 (most outward
track)tlayer 1 (most inward track)tfocus jump
(layer 1t0)
Specified value: 7000 msec or less (if no error occurred)
If an error occurred due to defocusing during the checking,
refer to the following error list. (64 page)
10. Press the 
[    OPEN/CLOSE]
 button, and the disc will be ejected
and the check will finish. Also, if the 
[        AMS        ]
 dial is
pressed in step 9, “2. F.JUMP CHK OK” will be displayed.
Then, if the 
[        AMS        ]
 dial is again pressed, “2. F.JMP
CHECK” will be displayed instantaneously and a recheck is
enabled from the step 5 in the same manner.
*1 Setting arbitrary number of times instead of 5 allows the check-
ing to be repeated by the set number of times. Also, setting 0
(zero) allows the aging check to be repeated until an error oc-
curs.
5-4. HYBRID DISC OPERATION CHECK
(• Perform as necessary)
This test checks the auto adjustment time required when the disc
is switched between HD (SACD) layer and CD layer. This test is
conducted to check the stability in switching from CD to SACD,
or SACD to CD in the HYBRID disc.
A set of operation including CD layer stop statetHD layer auto
adjustmenttHD layer TOC readingtHD layer stop statetCD
layer auto adjustmenttCD layer TOC readingtCD layer stop
state is repeated by the set number of times.
Checking Method:
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 4 clicks to display “3.
HYB CHECK?”.
3. Press the 
[    OPEN/CLOSE]
 button to open the tray, and place
the HYBRID disc.
4. Press the 
[        AMS        ]
 dial to load the tray into the set.
5. “NOW SET UP” will be displayed and the HYBRID disc setup
will start. (It takes about several seconds to set up the disc *1)
6. At the completion of setup, “CHANGE TIMES?” will be dis-
played.
7. Rotate the 
[        AMS        ]
 dial clockwise by 5 clicks to display
“5” (if 5 sets of operation is executed *2)
8. Press the 
[        AMS        ]
 dial, and “START” will be displayed
and the check will start. During the check, the following will
be displayed.
“CD—>HD” display: Time from switching from CD layer to
HD layer up to start of play is measured.
“HD—>CD” display: Time from switching from HD layer to
CD layer up to start of play is measured.
9. Immediately when the check finished, “CD MAX
ssss”t“CD AVE ssss”t“HD MAX
ssss”t“HD AVE ssss” will be displayed
repeatedly. (s denotes the measured value in msec)
Specified value: 10000 msec or less (if no error occurred)
If an error occurred due to defocusing during the checking,
refer to the following error list. (64 page)
10. Press the 
[    OPEN/CLOSE]
 button, and the disc will be ejected
and the check will finish. Also, if the 
[        AMS        ]
 dial is
pressed in step 9, “HYB CHK OK” will be displayed. Then, if
the 
[        AMS        ]
 dial is again pressed, “HYBRID CHECK”
will be displayed instantaneously and a recheck is enabled from
the step 5 in the same manner.
*1 “NOW SET UP” display may continue for several minutes
and an error may be displayed depending on the discs. In this
case, press the 
[        AMS        ]
 dial again.
*2 Setting arbitrary number of times instead of 5 allows the check-
ing to be repeated by the set number of times. Also, setting 0
(zero) allows the aging check to be repeated until an error oc-
curs
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