Read Sony CDX-C8050X Service Manual online
23
Pin No.
Pin Name
I/O
Pin Description
78
DSPRADY
I
Transfer enable signal input from the CXD2726Q (IC805)
“L”: transfer prohibition, “H”: transfer permission
79
KEYACK
I
Input of acknowledge signal for the key entry Acknowledge signal is input to
accept function and eject keys in the power off status On at input of “H”
80
ADON
O
A/D converter power control signal output terminal
When the KEYACK (pin ul) that controls reference voltage power for key A/D
conversion input is active, “L” is output from this terminal to enable the input
81
ACCIN
I
Accessory detection signal input terminal “L”: Accessory on
82
FLASH ON
O
Power on/off control signal output of the illumination LED and liquid crystal display
driver (IC901) “H”: power on
83
PWON
O
Main system power supply on/off control signal output terminal “H”: power on
84
TESTIN
I
Setting terminal for the test mode “L”: test mode, Normally: fixed at “H”
85
RAMBU
I
Internal RAM reset detection signal input from the RN5VD33AA (IC504)
Input terminal to check that RAM data are not destroyed due to low voltage
This checking is made within 100 msec after reset
86
HSTX
I
Hardware standby input terminal “L” hardware standby mode Reset signal input inset
87
MD2
I
Setting terminal for the CPU operational mode (fixed at “L” in this set)
88
MD1
I
Setting terminal for the CPU operational mode (fixed at “H” in this set)
89
MD0
I
Setting terminal for the CPU operational mode (fixed at “H” in this set)
90
RSTX
I
System reset signal input from the reset signal generator (IC503) and reset swich (S101)
“L”: reset “L” is input for several 100 msec after power on, then it changes to “H”
91
VSS
—
Ground terminal
92
X0
I
Main system clock input terminal (3.68 MHz)
93
X1
O
Main system clock output terminal (3.68 MHz)
94
VCC
—
Power supply terminal (+5 V)
95
ILLIN
I
Auto dimmer control illumination line detection signal input terminal
“L” is input at dimmer detection
96
TELATT
I
Telephone detection signaal input terminal At input of “H”, the signal is attenuated
by –20 dB
97
EMPH
I
Emphasis control signal input from the CD Mechanism controller (IC5)
98
F CH
O
Frequency changing terminal from the power control (IC302) “H”: frequency change
99 – 102
NCO
O
Not used (open)
103
4V SEL
I
Input terminal of whether line driver is mounted or not is detected
“L”: line driver is not mounted, “H”: line driver is mounted
104
COL SEL
I
Setting terminal for the illumination color
“L”: 2 color, “H”: 1 (red) color
105
AMPATT
O
Power amplifier muting on/off control signal output terminal “H”: muting on
Not used (open)
106
BOOT
O
Serial data output to the liquid crystal display drive controller (IC701)
107
DSPGAIN
O
Not used (open)
108
NCO
O
Not used (open)
109
MODELSEL0
I
Setting terminal for the internal mechanism tape or CD/MD
“L”: tape, “H”: CD/MD (fixed at “H” in this set)
110
DSPON
O
Power supply on/off control signal output for the CXD2726Q (IC805) “H”: DSP on
111
MODELSEL1
I
Setting terminal for the internal mechanism CD or MD
“L”: CD, “H”: MD (fixed at “H” in this set)
112
BAND
I
Not used (fixed at “L”)
113
TUNON
O
Tuner system power supply on/off control signal output terminal
“H”: tuner power on
114
DOORSW
I
Not used (fixed at “L”)
115
REIN1
I
Dial pulse input of the rotary encoder (RE901) (A phase input)
(for VOLUME/BASS/TREBLE/BALANCE/FADER control)
Click on the first or last page to see other CDX-C8050X service manuals if exist.