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Q Q
3 7 6 3 1 5 1 5 0
3-1. BLOCK DIAGRAM — CD SECTION —
DETECTOR
PD1
PD2
FPI2
96
PD2
PD1
94
FNI2
97
FPI1
95
FNI1
E
E
100
TNI
F
F
98
TPI
LASER DIODE
AUTOMATIC
LD
POWER
91 LDO
CONTROL
Q21
PD
LD
MON OUT
OPTICAL
PICK-UP BLOCK
(KSS1000E)
FOCUS/TRACKING COIL DRIVE,
SLED/SPINDLE/LOADING
T E
L
1 3 9 4 2 2 9 6 5 1 3
2-AXIS DEVICE
FCS+
16
VO4–
FCS–
15
VO4+
(FOCUS)
(TRACKING)
TRK+
18
VO3–
TRK–
17
VO3+
14
VO1+
M902
M
(SLED)
13
VO1–
12
VO2+
M901
M
(SPINDLE)
11 VO2–
10
VOL+
M903
M
(LOADING)
9
VOL–
w w w
CDX-GT250M
SECTION 3
DIAGRAMS
RFEQO
81 RFI
RFO
89
88 AGCI
83
82 RFRPI
RF AMP,DIGITAL SERVO,
DIGITAL SIGNAL PROCESSOR
IC2
RFRP
3
2 RFZI
TEI
6
7 TEZI
MDI
92
MOTOR DRIVE
IC1
9 F0O
OPIN4– 26
OPOUT4 25
OPIN3– 23
10 TRO
OPOUT3 22
12 FMO
OPOUT1 4
OPOUT2 7
13 DMO
MUTE 21
FWD
1
REV
28
x
a o
y
.
i
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8
LO
30
RO
27
R-CH
PIO3
51
37 DEC XMUTE
PIO0
48
30 DEC INT
36
27 DEC SSTBY
MSTBY
58
15 CD ZDET
ZDET
37
/RST
14 CD XRST
/CCE
43
13 CD XCCE
BUCK
42
12 CD BUCK
41
11 CD BUS3
BUS3
40
10 CD BUS2
BUS2
39
8 CD BUS1
BUS1
BUS0
38
7 CD BUS0
SYSTEM CONTROL
Q
Q
3
7
6
3
XI
23
81 X1
X2
X1
16.9344MHz
12MHz
24
80 X0
XO
SW1
46 MEC_DSW
(DOWN)
SW2
53 MEC_SELFSW
(SELF)
SW3
45 MEC_INSW
(DISC IN)
SW4
42 MEC_LIMIT
(LIMIT)
6
DRVON
43
MEC LOAD
44
MEC EJECT
u 1 6 3
.
13
13
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2
4
9
9
• R-ch is omitted due to same as L-ch.
• Signal Path
: CD PLAY
UNISI
56
UNI SI
RXD
25
UNISO
57
UNI SO
TXD
26
UNICKI
58
UNI CLK
BUS ON
50
BUS ON
BU IN
51
B/U CHECK
A ATT
60
ATT
RSTX
75
SYS RST
SYSTEM CONTROL
IC501 (1/3)
EJECT OK
61
89
EJECT OK SW
MECON
63
99
CDM ON
CDON
64
98
CD ON
ZMUTE
93
Z MUTE
66
CD
IC3
MECON CHK
67
MECHA+6V
CDON CHK
68
D+3.3V
1
5
1
5
0
8
9
2
+1.5V REG
IC6
+1.5V ON/OFF
5
VOUT
VDD
1
+1.5V
SWITCH
Q2,3
CE
3
+1.5V
CDON
1
1500MV
m
c o
CDX-GT250M
2
8
9
9
MAIN
CD-L
A
SECTION
(Page 14)
MAIN
B
SECTION
(Page 14)
DISPLAY
C
SECTION
(Page 15)
4
9
8
2
9
9
BU+3.3V
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