Sony DHC-EX880MD / DHC-MD717 / MDS-EX880 / MDS-MS717 Service Manual ▷ View online
– 17 –
8.
FOCUS BIAS ADJUSTMENT
Adjusting Method:
1. Load a continuously recorded disc (Refer to “4. Creating MO
1. Load a continuously recorded disc (Refer to “4. Creating MO
Continuously Recorded Disc”) to slot 1.
2. Turn the
[
=
SELECTOR
+
]
dial and display “CPLAY
MODE”.
3. Press the
[ENTER/YES]
button and display “CPLAY MID”.
4. Press the
[MENU/NO]
button when “C =
AD =
)” is
displayed.
5. Turn the
[
=
SELECTOR
+
]
dial and display “FBIAS
ADJUST”.
6. Press the
[ENTER/YES]
button and display “
/
a =
”.
The first four digits indicate the C1 error rate, the two digits
after [/] indicate ADER, and the 2 digits after [a=] indicate the
focus bias value.
after [/] indicate ADER, and the 2 digits after [a=] indicate the
focus bias value.
7. Turn right the
[
=
SELECTOR
+
]
dial and find the focus
bias value at which the C1 error rate becomes 220. (Refer to
note 2.)
note 2.)
8. Press the
[ENTER/YES]
button and display “
/
b =
”.
9. Turn left the
[
=
SELECTOR
+
]
dial and find the fo-
cus bias value at which the C1 error rate becomes 220. (Refer
to note 2.)
to note 2.)
10. Press the
[ENTER/YES]
button and display “
/
c =
”.
11. Check that the C1 error rate is below 50 and ADER is 00.
Then press the
[ENTER/YES]
button.
12. If the “(
)” in “
-
-
(
)” is above 20, press the
[ENTER/YES]
button.
If below 20, press the
[MENU/NO]
button and repeat the ad-
justment from step 2 again.
13. Press the
[REPEAT]
button and press the
§ button to remove
the continuously recorded disc.
Note 1:
The relation between the C1 error and focus bias is as shown in
the following figure. Find points a and b in the following figure
using the above adjustment. The focal point position c is auto-
matically calculated from points a and b.
the following figure. Find points a and b in the following figure
using the above adjustment. The focal point position c is auto-
matically calculated from points a and b.
Note 2:
As the C1 error rate changes, perform the adjustment using the
average vale.
average vale.
9.
ERROR RATE CHECK
9-1. CD Error Rate Check
Checking Method:
1. Load a test disc TDYS-1 to slot 1.
2. Turn the
1. Load a test disc TDYS-1 to slot 1.
2. Turn the
[
=
SELECTOR
+
]
dial and display “CPLAY
MODE”.
3. Press the
[ENTER/YES]
button and display “CPLAY MID”.
4. “C =
AD =
)” is displayed.
5. Check that the C1 error is below 20.
6. Press the
6. Press the
[MENU/NO]
button, stop playback, press the
[REPEAT]
button, and remove the test disc.
9-2. MO Error Rate Check
Checking Method:
1. Load a continuously recorded disc (Refer to “4. Creating MO
1. Load a continuously recorded disc (Refer to “4. Creating MO
Continuously Recorded Disc”) to slot 1.
2. Turn the
[
=
SELECTOR
+
]
dial and display “CPLAY
MODE”.
3. Press the
[ENTER/YES]
button and display “CPLAY MID”.
4. “C =
AD =
)” is displayed.
5. If the C1 error is below 50, check that ADER is 00.
6. Press the
6. Press the
[MENU/NO]
button, stop playback, press the
§
button, and remove the continuously recorded disc.
(To exit from the TEST mode, press the
(To exit from the TEST mode, press the
[REPEAT]
button.)
10. FOCUS BIAS CHECK
Change the focus bias and check the focus tolerance amount.
Checking Method:
1. Load a continuously recorded disc (Refer to “4. Creating MO
Checking Method:
1. Load a continuously recorded disc (Refer to “4. Creating MO
Continuously Recorded Disc”.).
2. Turn the
[
=
SELECTOR
+
]
dial and display “CPLAY
MODE”.
3. Press the
[ENTER/YES]
button and display “CPLAY MID”.
4. Press the
[MENU/NO]
button when “C =
AD =
)” is
displayed.
5. Turn the
[
=
SELECTOR
+
]
dial and display “FBIAS
CHECK”.
6. Press the
[ENTER/YES]
button and display “
/
c =
”.
The first four digits indicate the C1 error rate, the two digits
after [/] indicate ADER, and the 2 digits after [c=] indicate the
focus bias value.
Check that the C1 error is below 50 and ADER is 02.
after [/] indicate ADER, and the 2 digits after [c=] indicate the
focus bias value.
Check that the C1 error is below 50 and ADER is 02.
7. Press the
[ENTER/YES]
button and display “
/
b =
”.
Check that the C1 error is not below 220 and ADER is not
above 02 every time.
above 02 every time.
8. Press the
[ENTER/YES]
button and display “
/
a =
”.
Check that the C1 error is not below 220 and ADER is not
above 02 every time.
above 02 every time.
9. Press the
[MENU/NO]
button, next press the
§ button, and
remove the continuously recorded disc.
Note 1:
If the C1 error and ADER are above 02 at points a or b, the focus
bias adjustment may not have been carried out properly. Adjust
perform the beginning again.
bias adjustment may not have been carried out properly. Adjust
perform the beginning again.
C1 error
220
b
c
a
Focus bias value
(F. BIAS)
(F. BIAS)
– 18 –
11. ADJUSTING POINTS AND CONNECTING
POINTS
[BD BOARD] – SIDE A –
[BD BOARD] – SIDE B –
CN101
D101
CN107
GND
IC316
IC121
TP95
(RF)
(RF)
TP68
(FE)
TP69
(TEO)
(TEO)
TP30
(IOP–)
(IOP–)
TP29
(IOP+)
(IOP+)
TP58
(VC)
(VC)
IC101
– 19 –
– 20 –
MDS-EX880/MS717
SECTION 6
DIAGRAMS
6-1.
BLOCK DIAGRAM – MD SERVO Section –
F
C
B
D
A
E
I
J
J
I
B
A
C
D
D
E
F
DETECTOR
1
2
J
I
4
5
6
7
A
B
C
D
D
8
9
E
F
LD
PD
LASER DIODE
ILCC
PD
OPTICAL PICK-UP
(KMS-260A/J1N)
AUTOMATIC
POWER
CONTROL
Q162, 163
LASER ON
SWITCH
Q101
OVER WRITE
HEAD DRIVE
IC181, Q181, 182
HF MODULE
SWITCH
Q102 – 104, 113
11
10
APC
PD
LD/PD
AMP
APCREF
I-V
AMP
I-V
AMP
AT
AMP
B.P.F.
29
30
WBL
ADFM
ADIN
32
ADFG
ABCD
AMP
FOCUS
ERROR AMP
TRACKING
ERROR AMP
35
34
26
28
ABCD
FE
TE
SE
V-I
CONVERTER
20
F0CNT
WBL
3T
EQ
SERIAL/
PARALLEL
CONVERTER,
DECODER
COMMAND
17
16
18
SWDT
SCLK
XLAT
RF AMP
B.P.F.
46
RFO
40
RF AGC
& EQ
AGCI
EQ
38
RF
RF AMP,
FOCUS/TRACKING ERROR AMP
IC101
TEMP
48 47
MORFO
MORFI
3T
PEAK &
BOTTOM
WBL
33
AUX
62
37
PEAK
36
BOTM
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC152
6
8
OUT4F
OUT4R
M
M901
(SPINDLE)
27
25
OUT2F
OUT2R
M
M902
(SLED)
21
23
OUT1F
OUT1R
12
10
OUT3F
OUT3R
FCS+
FCS–
TRK+
TRK–
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
3
4
IN4R
IN4F
29
30
IN2F
IN2R
19
18
IN1F
IN1R
14
15
IN3F
IN3R
MOD
SPFD
SPRD
92
91
88
89
86
85
APCREF
SFDR
SRDR
FFDR
FRDR
TFDR
TRDR
16
PSB
PWM GENERATOR
AUTOMATIC
POWER
CONTROL
DIGITAL
SERVO
SIGNAL
PROCESS
74
65
64
66
75
ANALOG MUX
A/D CONVERTER
AUTO
SEQUENCER
FROM CPU
INTERFACE
DIGITAL SERVO
SIGNAL PROCESSOR
IC121 (2/2)
RECP
+3.3V
AUX2
AUX1
ABCD
FE
TE
SE
PEAK
BOTM
81
80
82
XLRF
CKRF
DTRF
XLAT
SCLK
SWDT
PLL
FILTER
59
58
61
60
FILI
PCO
CLTV
FILO
100
EFMO
23
ADDT
IC121 (1/2)
15
TX
51
52
55
ASYO
ASYI
RFI
SCTX
HR901
OVER WRITE HEAD
ADIP
DEMODULATOR/
DECODER
78
ADFG
SPINDLE
SERVO
F0CNT
94 93
SPFD
SPRD
SUBCODE
PROCESSOR
SAMPLING
RATE
CONVERTER
DIGITAL
AUDIO
INTERFACE
22
21
DIN
DOUT
DIGITAL SIGNAL PROCESSOR,
EFM/ACIRC ENCODER/DECODER,
SHOCK PROOF MEMORY CONTROLLER,
ATRAC ENCODER/DECODER, 2M BIT D-RAM
IC121 (1/2)
DADT
INTERNAL BUS
D-RAM
CLOCK
GENERATOR
25
26
27
XBCK
LRCK
FS256
X100
22.5792MHz
OSCI
OSCO
CPU
INTERFACE
MONITOR
CONTROL
CONTROL
10
XRST
12
DQSY
11
SQSY
14
XINT
9 8
5 6 7
SENS
SRDT
SWDT
SCLK
XLAT
1
2
3
4
MNT0
MNT1
MNT2
MNT3
FOK
SHOCK
XBUSY
SLOCK
SWDT
SCLK
XLAT
40
35 37 38
48 47 46 45
MNT0
MNT1
MNT2
MNT3
DIG-RST
SQSY
DQSY
LDON
WRPWR
MOD
XINT
SENS
SRDT
75
76
HEAD UP
HEAD DOWN
4
5
6
5
05
1
7
M
FIN
RIN
SDA
SCL
OUT1 OUT2
OVER WRITE HEAD
UP/DOWN
MOTOR DRIVE
IC172
EEPROM
IC171
M905
(OVER WRITE HEAD UP/DOWN)
XIN
SDA
SCL
XOUT
X302
7MHz
47, 46, 48, 49
1, 2, 18, 19
D0 – D3
32 – 29, 34 – 38, 43
6 – 9, 11 – 15, 5
A00 – A09
D0 – D3
A00 – A09
41
16
45
3
44
4
42
17
XOE
XWE
XRAS
XCAS
XOE
XWE
XRAS
XCAS
D-RAM
IC124
MD MECHANISM CONTROLLER
IC316 (1/2)
73
13
63
50
79
83
12
HF MODULE
16
17
C
(Page 21)
B
(Page 21)
A
(Page 21)
(Page 21)
D
5 23 41 36
20
49
44
15
13
79
SCTX
80
42
REFLECT
54
HEAD SW DOWN
PROTECT
S683
(PROTECT)
74
55
S682
(REFLECT)
59
73
LIMIT-IN
HEAD SW UP
S681
(LIMIT IN)
•
SIGNAL PATH
: MD PLAY
: MD REC (ANALOG INPUT)
: MD REC (DIGITAL INPUT)
: MD REC (ANALOG INPUT)
: MD REC (DIGITAL INPUT)
COMPA-
RATOR
EFM/ACIRC
ENCODER/DECODER
SHOCK PROOF
MEMORY CONTROLLER
ATRAC
ENCODER/DECODER
24
S6
OVER WRITE HEAD
UP DETECT
S7
OVER WRITE HEAD
DOWN DETECT
– 21 –
– 22 –
6-2.
BLOCK DIAGRAM – MAIN Section –
05
MASTER CONTROLLER
IC305
LOADING
MOTOR DRIVE
IC308
ELEVATOR
UP/DOWN
MOTOR DRIVE
IC309
CLOCK IN
BUS BUSY
CLOCK OUT
DAT0
DAT1
DAT3
DAT2
1 2 3 4
SYSTEM-RST
PWR-DWN
12
19
RESET
SWITCH
Q402
MD MECHANISM CONTROLLER
IC316 (2/2)
EMP 7
AD-EN 25
DA-EN 24
IN1
IN2
IN1
IN2
OUT1
M903
(LOADING)
OUT2
OUT1
OUT2
3
2
3
2
11
X402
5MHz
X2
X1
10
LEVEL SHIFT
IC312 (1/3)
LEVEL SHIFT
IC312 (2/3)
LEVEL SHIFT
IC312 (3/3)
TXD
RXD
CLK
MAS-BUSY
MEC-BUSY
49
32
26
48
31
47
46
50
34
33
CTS
RTS
SIO CLK
SIO TXD
SIO RXD
M
M904
(ELEVATOR UP/DOWN)
M
8
7
8
7
SENSOR (MAIN)
SENSOR (SUB)
ELEVATOR POSITION
SENSOR
D1
LEVEL SHIFT
Q2, 3
ELEVATOR POSITION
SENSOR
D2
LEVEL SHIFT
Q1
D701 – 703
LED DRIVE
Q503 – 505
56
55
54
MONO
ANA
DIG
D704, 705,
D712 – 714
68
67
66
REC IT
CD SYNC
PROGRAM
65
64
SHUFFLE
CONTINUE
A/D, D/A CONVERTER
IC201
12
15
16
24
23
11
SDTO
AINL
AINR
AOUTL
AOUTR
R-CH
R-CH
R-CH
SDTI
SCLK
MCLK
LRCK
XBCK
FS256
LRCK
DEM0
14
13
5
3
26
27
C
(Page 20)
(Page 20)
(Page 20)
A
D
DIG IN SEL1
DIG IN SEL0
(Page 20)
PDAD
PDDA
PDDA
OPTICAL
RECEIVER
IC302
REC AMP
IC318
RV801
REC LEVEL
J101
MD ANALOG
MD DIGITAL
SYSTEM CONTROL
OPTICAL
DIGITAL IN
CD PLAYER
OPTICAL
DIGITAL IN
VIDEO 2
OPTICAL
DIGITAL IN
VIDEO 1
IC301 – 303
R-CH
IN
L
R
OUT
L
R
OPTICAL
RECEIVER
IC301
OPTICAL
RECEIVER
IC303
BUFFER
IC304
DIGITAL INPUT
SELECTOR
IC306
A B
6
14 2
4
5
5
3
7
B
•
SIGNAL PATH
: MD PLAY
: MD REC (ANALOG INPUT)
: MD REC (DIGITAL INPUT)
24 – 22, 20 – 13
QC – QE, QG – QN
D708 – 711,
D801 – 803
4
DATA
LED DATA
LED CLOCK
LED LATCH
LED DRIVE
IC702
CLK
LATCH
8
60
59
58
57
6
7
RES
LED REST
B+
REC AMP (IC318)
+3.3V
REGULATOR
IC192
B–
RECT
D314 – 316, 321
–29V
REGULATOR
Q521, 522
–29V
(FL DRIVER (IC701) B–)
RECT
D312, 313
CN308
F1
TO FL701
F2
D305
D329
D304
D303
+5V
+5V
BACK UP +3.3V
D331
14
16
AC
AC
11
YBUS BUSY
10
YBUS CLK
9
YBUS DATA3
8
YBUS DATA2
7
YBUS DATA1
6
YBUS DATA0
RECT
D326, 327
+3.3V
FOR MECHANISM
DECK SECTION
+5V
MASTER CONTROLLER
(IC305) B+
+3.3V
FOR DIGITAL INPUT
CIRCUIT B+
+5.6V
REGULATOR
IC315
+3.3V
REGULATOR
IC314
+5.6V MOTOR
+5.6V
REGULATOR
IC310
AD/DA +5V
+5V
REGULATOR
IC319
RECT
D319, 320
OEMREST
51
BACK UP
+3.3V
+5V
D328
POWER DOWN
DETECT
IC316
RESET SIGNAL
GENERATOR
IC317
RESET
POW DOWN
12 – 1, 64, 63
DIG0 – DIG13
59 – 33, 31 – 24
SEG0 – SEG34
OSC
C707, R705
FLUORESCENT
INDICATOR
TUBE DRIVER
IC701
FLUORESCENT
INDICATOR
TUBE
FL701
FL DATA
FL CLOCK
42
43
44
44
45
16
15
14
14
13
20
DATA
CLK
XOUT
XIN
RES
CS
FL RES
FL CL
21
96
99
82
83
84
85
18
52
LD IN
LD OUT
ELV UP
ELV DW
DISC3 SW
88
DISC4 SW
S10
(LOADING IN DETECT)
DISC2 SW
DISC1 SW
S9
(RESET)
S8
(HOME POSITION DETECT)
89
S11
(LOADING OUT DETECT)
OUT SW
93
MDM RESET SW
INT SW
91
IN SW
DISC5 SW
97
S1
(DISC 1 DETECT)
S3
(DISC 2 DETECT)
S5
(DISC 3 DETECT)
86
+5V
+5V
87
90
92
KEY0 – KEY3
S700 – 709, 711 – 713,
S716, 718, 721 – 723,
S726 – 728
25 – 28
ROTARY
ENCODER
S661
JOG A
JOG B
19
20
= SELECTOR +
S661
15
RESET
SWITCH
Q301
8
17
16
5
OPTICAL
DIGITAL IN
LD/DVD
OPTICAL
DIGITAL IN
CS/BS
MDS-EX880
MDS-MS717
MDS-EX880
MDS-MS717
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