Read Sony CDX-C7850R Service Manual online
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Pin No.
Pin Name
I/O
Pin Description
55
RAMBU
I
RAM reset detection input
56
POWSEL
I
Power select initial setting input
57
EQ-SEL
I
Equalizer connection with/without detection initial input
58
TESTIN
I
Test mode setting detection input
59
DOORIND
O
Door indicator output
60
TIRPLAY
O
Audio line select control output at TIR playback.
61, 62
SUB-SW1, 0
O
Simple SUB WOOFER control output 1, 0
63
VSS
—
GND
64
VOLCE
O
Electric volume serial chip enable output
65
MUTE
O
System mute control output
66
VOLSO/SUBSO
O
Main/Sub volume serial data output
67
VOLCKO/SUBCKO
O
Main/Sub volume serial clock output
68
SUBCE
O
Sub volume serial chip enable output
69
FLASH-W
I
Flash write in mode detection input
70
I2CSIO
I/O
RDS serial data input/output
71
I2CCKO
O
RDS serial clock output
72
RC-IN1
I
Rotary commander input
73
X1A
—
Low speed oscillation input (32.768 kHz)
74
X0A
—
Low speed oscillation input (32.768 kHz)
75
DAVN
I
RDS IC data taking in detection input
76
KEYACK
I
Key input acknowledge
77
BU-IN
I
Back-up power detection input
78
ILLIN
I
Illumination line detection input
79
TELMUTE
I
Telephone mute detection input
80
NOSESW
I
Front panel detachable detection input
81
ACCIN
I
Accessory power detection input
82 – 85
TIR-D0 – D3
I/O
TIR IC command input/output 0 – 3
86
(VCC)
—
Connect to power supply pin.
87
(VSS)
—
Connect to GND.
88, 89
(VCC)
—
Connect to power supply pin.
90
RST
—
Microcomputer reset input
91
VSS
—
GND
92
X0
—
High speed oscillation input (3.68 MHz)
93
X1
—
High speed oscillation input (3.68 MHz)
94
VCC
—
Power supply pin (+5 V)
95
TIR-BUSY
I
TIR IC BUSY output monitor pin
96
TIR-WR
O
TIR IC data write in pulse output
97, 98
TIR-CE
O
TIR IC chip enable output
99
TIR-RES
O
TIR IC reset/power down output
100
TIR-PDWN
O
TIR IC power down output
101
TIR-RD
O
TIR IC data read in pulse output
102
MTLIN
I
Auto METAL detection input (Not used in this set.)
103
AM STIN
I
AM stereo detection input (Not used in this set.)
104
REEL
I
Tape reel table rotation detection input (Not used in this set.)
105
POS0
I
Tape position detection input 0 (Fixed at “H” in this set.)
106
POS1
I
Tape position detection input 1 (Fixed at “H” in this set.)
107
POS2
I
Tape position detection input 2 (Fixed at “H” in this set.)
108
POS3
I
Tape position detection input 3 (Fixed at “H” in this set.)
109
LM-EJ
O
Tape loading motor control output (Eject direction) (Not used in this set.)
110
LM-LOD
O
Tape loading motor control output (Loading direction) (Not used in this set.)
111
CM-ON
O
Tape capstan motor control output (Not used in this set.)
112
TAPEON
O
Tape power control output (Not used in this set.)
113
N-ROUT
O
Tape forward/reverse detection output (Not used in this set.)
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