Sony CDX-C8000R / CDX-C8000RX Service Manual ▷ View online
25
• IC502 MB90574PMT-G-264-BND (SYSTEM CONTROL) (MAIN BOARD)
Pin No.
Pin Name
I/O
Pin Description
1
NIL
I
Not used (fixed at “L”)
2
AMSIN
I
Input terminal of whether a music is present or not is detected at auto music sensor
“L”: music is not present, “H”: music is present Not used (fixed at “L”)
3
AMSON
O
Tape auto music sensor control signal output terminal
“L” is output to lower the gain for audio level at FF/REW mode Not used (open)
4
SP LAT
O
Serial data latch pulse output for spectrum analyzer section to the liquid crystal
display drive controller (IC701)
5
ATT
O
Audio line muting on/off control signal output terminal “L”: muting on
6
SYSRST
O
System reset signal output to the MD mechanism controller (IC501), liquid crystal
display drive controller (IC701) and SONY bus interface (IC601) “L”: reset
7
F/R
O
Tape detection signal output terminal “L”: reverse side, “H”: forward side
Not used (open)
8
VCC
—
Power supply terminal (+5 V)
9
MTLIN
I
Auto metal detection signal input terminal Not used (fixed at “L”)
10
E2PSIO
I/O
Two-way data bus for tuner EEPROM with the FM/AM tuner unit (TUX201)
11
E2PCKO
O
Tuner EEPROM bus clock signal output to the FM/AM tuner unit (TUX201)
12
FLS SI
I
Input terminal at the flash memory data write mode
Front panel open/close detection signal input terminal
“L” is input when the front panel is closed
13
FLS SO
O
Output terminal at the flash memory data write mode
Display serial data output to the liquid crystal display driver (IC901)
14
BUS-ON
O
Bus on/off control signal output to the CD mechanism controller (IC5), liquid crystal
display drive controller (IC701) and SONY bus interface (IC601) “L”: bus on
15
BEEP
O
Beep sound drive signal output terminal
16
NCO
O
Not used (open)
17
UNISI
I
Serial data input from the SONY bus interface (IC601)
18
UNISO
O
Serial data output to the SONY bus interface (IC601)
19
UNICKO
O
Serial clock signal output to the CD mechanism controller (IC5), liquid crystal
display drive controller (IC701) and SONY bus interface (IC601)
20
IFWIDTH
I
Tuner wide/narrow select signal input terminal “L”: wide, “H”: narrow
Not used (fixed at “L”)
21
SWSHIFT
O
When the radio is tuned at the frequency to produce beats, shift the frequency of the
signal from the D/D converter so as to produce no beats.
22, 23
NCO
O
Not used (open)
24
SIRCS
I
Sircs remote control signal input from the remote control receiver (IC951)
25
DSPSI
I
Serial data input from the CXD2726Q (IC805)
26
DSPSO
O
Serial data output to the CXD2726Q (IC805)
27
DSPCKO
O
Serial data transfer clock signal output to the CXD2726Q (IC805) and liquid crystal
display drive controller (IC701)
28
DSPPLL
O
PLL clock control signal output to the CXD2726Q (IC805)
At “L” is output: fixed at “L” is PLCLK (pin ia of IC805 CXD2726Q )
At “H” is output: PLL clock signal output to the PLCLK (pin ia of IC805 CXD2726Q)
29
DSPMST
O
Bit clock (BCK) and L/R sampling (LRCK) signal master/slave mode selection signal
output to the CXD2726Q (IC805) “L”: master mode, “H”: slave mode
30
NCO
O
Not used (open)
31
VOLATT
O
Pre amplifier muting on/off control signal output to the electrical volume (IC301)
“L”: muting on
32
TU ATT
O
Muting on/off control signal output of the FM/AM tuner signal “L”: muting on
33
VSS
—
Ground terminal
34
C
—
Connected to coupling capacitor for the power supply
35
DSPLAT
O
Serial data latch pulse output to the CXD2726Q (IC805)
36
DSPRST
O
Reset signal output to the CXD2726Q (IC805) “L”: reset
26
Pin No.
Pin Name
I/O
Pin Description
37
ANT CUT
O
Tuner system power supply on/off control signal output terminal
“H” tuner power on Not used (open)
38
DVCC
—
Power supply terminal (+5 V) (for D/A converter)
39
DVSS
—
Ground terminal (for D/A converter)
40, 41
NCO
O
Not used (open)
42
AVCC
—
Power supply terminal (+5 V) (for analog system)
43
AVRH
I
Reference voltage (+5 V) input terminal (for A/D converter)
44
AVRL
I
Reference voltage (0 V) input terminal (for A/D converter)
45
AVSS
—
Ground terminal (for analog system)
46
KEYIN0
I
Key0 input terminal (A/D input )
47
KEYIN1
I
Key1 input terminal (A/D input )
48
RCIN0
I
Rotary remote commander key input terminal (A/D input)
49
DSTSEL
I
Destination setting terminal (A/D input) “L”: TYPE1, “M”: TYPE3, “H”: TYPE2
50
QUALITY
I
Noise level detection signal input at SEEK mode (A/D input)
51
FM AGC
I
FM AGC detection signal input from the FM/AM tuner unit (TUX201) (A/D input)
52
MPTH
I
Multi-path detection signal input from the RDS decoder (IC201) (A/D input)
53
VSM
I
FM and AM signal meter voltage detection input from the FM/AM tuner unit
(TUX201) (A/D input)
54
VCC
—
Power supply terminal (+5 V)
55
AMPON
O
Standby on/off control signal output terminal
“L”: standby mode, “H”: amplifier on
56
NS MASK
O
Discharge control signal output for the noise detection circuit “H”: discharge
57
MTLOUT
O
METAL output terminal (METAL on at “L” output) Not used (open)
58
REEL
I
Rotation detect signal input terminal Not used (fixed at “L”)
Tape position (EJECT/FF/REW/REV/FWD mode) detect input from the tape
operation switch on the deck mechanism Not used this function (fixed at “L”)
POS0: “L”: EJECT mode, “H”:others mode
POS1: “L”: FF and FWD mode, “H”: others mode
POS2: “L”: REW mode,“H”: others mode
POS3: “L”: REV and EJECT mode, “H”: others mode
63
VSS
—
Ground terminal
64
NCO
I
Not used (fixed at “L”)
65
FSW IN
I
Frequency count input terminal from power control (IC302)
66
LMLOD
O
Loading motor control signal output terminal “H” active
(For the loading direction and forward side operation) Not used (open)
67
CMON
O
Capstan/reel motor control signal output terminal “H”: motor on Not used (open)
68
TAPE ON
O
Tape system power supply on/off control signal output terminal “H”: tape on
Not used (open)
69
FLASH W
I
Internal flash memory data write mode detection signal input terminal
70
I2CSIO
I/O
Two-way data I2C bus with the FM/AM tuner unit (TUX201), RDS decoder (IC201)
and electrical volume (IC301)
71
I2CCKO
O
I2C bus clock signal output to the FM/AM tuner unit (TUX201), RDS decoder
(IC201) and electrical volume (IC301)
72
RCIN1
I
Rotary remote commander shift key input terminal
73
X1A
O
Sub system clock output terminal (32.768 kHz)
74
X0A
I
Sub system clock input terminal (32.768 kHz)
75
DAVN
I
Data transmit completed detection signal input from the RDS decoder (IC201)
“L” active
76
DISCON_IN
I
CD/MD on/off control signal input from the CD mechanism controller (IC5)
77
BUIN
I
Battery detection signal input from the SONY bus interface (IC601) and battery detect
circuit “L” is input at low voltage
59
POS0
I
60
POS1
I
61
POS2
I
62
POS3
I
27
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 signal 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 (CDX-C8000R), “H”: 1 (red) color (CDX-C8000RX)
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 “L” 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)
28
Pin No.
Pin Name
I/O
Pin Description
116
REIN0
I
Dial pulse input of the rotary encoder (RE901) (B phase input)
(for VOLUME/BASS/TREBLE/BALANCE/FADER control)
117
NOSESW
I
Front panel block remove/attach detection signal input from the nose detection switch
(S102) “L”: front panel is attached
118
DOORIND
O
LED drive signal output of the CD disc slot illumination and Z indicator (LED771 –
773, LSW771) “H”: LED on “H”is output to turn on LED when front panel is opened
119
VSS
—
Ground terminal
120
DOLBY
O
Dolby control terminal “H”: dolby on Not used (open)
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