Sony CDX-C4750 / CDX-C6600 Service Manual ▷ View online
– 45 –
4-11. IC PIN DESCRIPTION
• IC801 MB90574PFV-G-193-BND (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Pin Description
1
LD ON
O
Laser ON/OFF control output
2
FOK
I
Focus OK signal detection input
3
XLAT25
O
CD signal processing latch output
4
DATA25
O
CD signal serial data output
5
XRST
O
Reset output to CD signal processor IC.
6
GFS
I
GFS signal detection input
7
NIL
—
Not used. (Connect to ground in this set.)
8
VCC
—
Power supply pin (+5 V)
9 – 11
NIL
—
Not used. (Open)
12
FLS SI/NOSE1
I
Front panel attachment detection input
13
LCD SO/FLS SO
O
LCD serial data output
14
LCD CKO
O
LCD serial clock output
15
BEEP
O
BEEP output
16
NIL
—
Not used. (Open)
17
SQ SI
I
Sub Q data input
18
NIL
—
Not used. (Connect to ground in this set.)
19
SQ CKO
O
Sub Q read clock output
20
UNI SI
I
BUS system serial interface input
21
UNI SO
O
BUS system serial interface output
22
UNI CK
I/O
BUS system serial clock input/output
23
C IN
I
Track jump No. count input
24
SIRCS
I
Remote commander input
25
TXT SI
I
CD-TEXT data input
26
NIL
—
Not used. (Connect to ground in this set.)
27
TXT CKO
O
CD-TEXT data read clock output
28
CLOK25
O
CD signal processing serial clock output
29
SYSRST
O
System reset output
30
DEEMPH
O
De-emphasis output
31
AMP ATT
O
Power amplifier attenuator control output
32
MD ON
O
CD mechanism power control output
33
VSS
—
Ground
34
C
—
Power stabilization capacitor pin
35
CD ON
O
CD power control output
36
BUS ON
O
BUS ON control output
37
AD ON
O
Power control output of A/D conversion.
38
DVCC
—
VREF input of D/A converter.
39
DVSS
—
Ground of D/A converter.
40
NIL
—
Not used. (Open)
41
ANGLE
O
LCD view angle alignment output (Not used in this set.)
42
AVCC
—
Analog power supply pin (+5 V)
43
AVRH
—
VREF + input of A/D converter.
44
AVRL
—
VREF – input of A/D converter.
45
AVSS
—
Analog ground
46 – 48
KEY IN0 – 2
I
Key input 0 – 2
49
RC IN0
I
Rotary commander input 0
50
QUALITY
I
Not used in this set.
51
NIL
—
Not used. (Connect to ground in this set.)
52
MPDH
I
Tuner multi path input (Not used in this set.)
53
S-METER
I
S-meter voltage detection input
54
VCC
—
Power supply pin (+5 V)
55
NS MASK
O
Not used in this set.
– 46 –
Pin No.
Pin Name
I/O
Pin Description
56
AMP ON
O
Power amplifier power control output
57
TXT ON
O
Reset output to CD-TEXT decoder IC. (Not used in this set.)
58
VOL ATT
O
Electric volume mute control output
59
NIL
—
Not used. (Open)
60
ATT
O
System attenuate control output
61
RC IN1
I
Rotary commander shift key input 1
62
TU ATT
O
Tuner attenuate output (Not used in this set.)
63
VSS
—
Ground
64
NIL
—
Not used. (Open)
65
SSTOP
I
IF counter result signal detection input of PLL.
66
TEST
I
Test mode initial setting detection input
67
DAVN
I
RDS IC data acquisition detection input (Fixed at “L” in this set.)
68
FM ON/AM ON
O
FM ON output
69
TU ON
O
Tuner power control output
70
SDA
I/O
I2C BUS serial data input/output
71
SCL
O
I2C BUS serial clock output
72
NOSE2
I
Front panel OPEN detection input (Not used in this set.)
73
X1A
O
Sub ceramic oscillator output (32 kHz)
74
X0A
I
Sub ceramic oscillator input (32 kHz)
75
SCOR
I
SCOR signal detection input
76
BU IN
I
Backup power detection input
77
DQSY
I
CD-TEXT data setting completion signal detection input
78
CD SENS
I
CD SENS signal detection input
79
KEY ACK
I
Key input acknowledge
80
TEL ATT
I
Telephone attenuate detection input
81
ST/MONO
I/O
Tuner stereo signal detection input/forced monaural output
82
SEEKOUT
O
SEEK output
83
SD IN
I
Signal detector input
84
WIDE
O
WIDE/NARROW select output (Not used in this set.)
85
NARROW
O
WIDE/NARROW select output (Not used in this set.)
86
HSTX
—
Hardware standby input (Connect to pin
(º (RESET).)
87
MD2
—
Operation mode input (Connect to ground in this set.)
88, 89
MD1, 0
—
Operation mode input (Connect to VCC in this set.)
90
RESET
I
Reset input
91
VSS
—
Ground
92
X0
I
Main ceramic oscillator input (4.19 MHz)
93
X1
O
Main ceramic oscillator output (4.19 MHz)
94
VCC
—
Power supply pin (+5 V)
95
COM8V ON
O
COM 8V control output
96
NIL
—
Not used. (Open)
97
AREA1
I
Destination select input 1 (Fixed at “L” (CDX-C4750) or “H” (CDX-C6600) in
this set.)
98
AREA2
I
Destination select input 2 (Fixed at “L” (CDX-C6600) or “H” (CDX-C4750) in
this set.)
99
AREA3
I
Destination select input 3 (Fixed at “L” in this set.)
100
BAND
I
Frequency select input (CDX-C6600)
101
ACC IN
I
Accessory power detection input
102, 103
PH3, 2
I
Disc insertion detection photo sensor input (Not used in this set.)
104
LCD CE
O
LCD chip enable output
105
FLS W
I
Flash write input (Fixed at “H” in this set.)
106, 107
RE IN0, 1
I
Rotary encoder input
108
ILL ON
O
Illumination power control output
109
PW ON
O
System power control output
– 47 –
Pin No.
Pin Name
I/O
Pin Description
110
NIL
—
Not used. (Open)
111
ANT REM
O
ANT REMOTE power control output
112, 113
NIL
—
Not used. (Open)
114
CD LD
O
Loading motor control output (Loading direction)
115
CD EJ
O
Loading motor control output (Eject direction)
116
L SW
I
Sled limit switch detection input
117
IN SW/(PH1)
I
Disc insertion detection input
118
D SW
I
DOWN switch detection input
119
VSS
—
Ground
120
SELF SW/(IN SW)
I
Disc self store detection input
– 48 –
SECTION 5
EXPLODED VIEWS
NOTE:
• The mechanical parts with no reference
number in the exploded views are not supplied.
• Items marked “*” are not stocked since
they are seldom required for routine service.
Some delay should be anticipated
when ordering these items.
Some delay should be anticipated
when ordering these items.
• -XX and -X mean standardized parts, so
they may have some difference from the
original one.
original one.
• Color Indication of Appearance Parts
Example :
KNOB, BALANCE (WHITE) ... (RED)
Parts Color Cabinet’s Color
• Accessories and packing materials and
hardware (# mark) list are given in
the last of this parts list.
the last of this parts list.
Ref. No.
Part No.
Description
Remark
5-1. CHASSIS SECTION
N
N
Ref. No.
Part No.
Description
Remark
1
11
3
5
8
9
6
7
2
10
4
#1
#1
#2
#2 #2
#10
#2
#2
#2
#2
#1
#1
#1
#3
#3
MG-363X-121
TU601
F901
A
A
B
B
12
#2
The components identified by
mark
mark
! or dotted line with mark.
! are critical for safety.
Replace only with part number
specified.
Replace only with part number
specified.
* 1
X-3376-729-1 COVER ASSY
2
X-3376-728-1 PANEL (1) ASSY, SUB
3
X-3368-104-2 LOCK ASSY
* 4
3-030-927-01 BRACKET (MD)
5
3-376-464-11 SCREW (+PTT 2.6X6), GROUND POINT
* 6
A-3294-607-A MAIN BOARD, COMPLETE (C4750)
* 6
A-3294-642-A MAIN BOARD, COMPLETE (C6600)
* 7
3-030-877-01 HEAT SINK
* 8
3-019-565-01 BRACKET (IC)
* 9
3-030-928-01 HEAT SINK (REG)
* 10
3-030-876-01 CHASSIS
11
1-776-207-82 CORD (WITH CONNECTOR) (POWER)
* 12
3-024-285-01 CUSHION (RUBBER)
F901
1-532-877-11 FUSE (BLADE TYPE) (AUTO FUSE) 10A
TU601
A-3301-700-A TUNER ASSY (C4750)
TU601
A-3301-799-A TUNER ASSY (C6600)
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