Sony MDX-C8900 Service Manual page 60

Pin No. Pin Name
VOLCKO/
67
SUBCKO
68 SUBCE
69
FLASH-W
70 RDSSI
71 RDSCKI
72 RC-IN1
73 X1A
74 X0A
75 DAVN
76 KEYACK
77 BU IN
78 ILL IN
79
TEL-ATT
80 NOSESW
81 ACC IN
82 to 85
TIR-D0 to TIR-D3
86 HSTX
87 MD2
88 MD1
89 MD0
90 RESET
91 VSS
92 X0
93 X1
94 VCC
95 TIR-BUSY
96 TIR-WR
97 TIR-CE
98 BBE
99 LO
100 PRO
101 TIR-RD
102 MTLIN
103
AM STIN
104 LOCK
105 to108 POS0 to POS3
109 MD MUTE
110 LM-LOD
111 LINKOFF
112 TAPE-ON
I/O
Serial data transfer clock signal output to the main electrical volume (IC400) and sub electrical
O
volume (IC403)
O Chip enable signal output to the sub electrical volume (IC403) "H" active
Internal flash memory data write mode detection signal input terminal "L": data write mode
I
Not used (fixed at "H" in this set)
I
Serial data input from the external device Not used (open)
I Serial data transfer clock signal input from the external device Not used (open)
I Rotary remote commander shift key input terminal "L": shift
O
Sub system clock output terminal (32 kHz)
I
Sub system clock input terminal (32 kHz)
I Not used (open)
Input of acknowledge signal for the key entry Acknowledge signal is input to accept function
I
and eject keys in the power off status On at input of "H"
Battery detect signal input from the SONY bus interface (IC504) and battery detect circuit
I
"L" is input at low voltage
Auto dimmer control illumination line detection signal input terminal
I
"L" is input at dimmer detection
I Telephone muting signal input terminal At input of "L", the signal is attenuated by –20 dB
Front panel block remove/attach detection switch (SW503) signal input terminal
I
"L": front panel is attached
I Accessory detect signal input terminal "L": accessory on
O
Not used (pull down)
I
Hardware standby input terminal "L": hardware standby mode Reset signal input in this set
I
Setting terminal for the CPU operational mode (fixed at "L" in this set)
I
Setting terminal for the CPU operational mode (fixed at "H" in this set)
I
Setting terminal for the CPU operational mode (fixed at "H" in this set)
System reset signal input from the reset signal generator (IC505) and reset switch (SW701)
I
"L" is input for several 100 msec after power on, then it changes to "H"
—
Ground terminal
I Main system clock input terminal (3.68 MHz)
O Main system clock output terminal (3.68 MHz)
—
Power supply terminal (+5V)
O
Not used (pull down)
O Not used (pull down)
O
Not used (pull down)
O
Boost on/off control signal output to the NJM2150AM (IC409)
O
Low-range boost control signal output to the NJM2150AM (IC409)
O High-range boost control signal output to the NJM2150AM (IC409)
O
Not used (pull down)
I
Not used (fixed at "L")
I
AM detection signal input terminal Not used (fixed at "L")
Mini-disc lock detection signal input from the MD mechanism controller (IC501) "H": lock
I
CLV lock status input in test mode
I Not used (fixed at "L")
The audio muting control signal is input from the MD mechanism controller (IC501), and output
I
to ATT (pin ^∞)
O
Not used (pull down)
O
Not used (pull down)
O
Not used (pull down)
Function
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