Read Sony CDX-C4840R / CDX-C4850R Service Manual online
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.
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
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
68
FM ON/AM ON
O
FM ON output
69
TU ON
O
Tuner power control output
70
SDA
I/O
I
2
C BUS serial data input/output
71
SCL
O
I
2
C BUS serial clock output
72
NOSE2
I
Front panel OPEN detection input
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
NIL
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 select output (Not used in this set.)
85
NARROW
O
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” in this set.)
98
AREA2
I
Destination select input 2 (Fixed at “L” (AEP, UK model) or “H” (German model)
in this set.)
99
LOUD
I
Fixed at “L” in this set.
100
BAND
I
Fixed at “H” in this set.
101
ACC IN
I
Accessory power detection input
102, 103
PH3, 2
I
Disc insertion detection photo sensor input (Fixed at “H” 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
110
NIL
—
Not used. (Open)
Pin No.
Pin Name
I/O
Pin Description
111
ANT REM
O
ANT REMOTE power control output
112
NIL
—
Not used. (Open)
113
CTL2
—
Not used in this set.
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
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