Sony MDX-C7900 Service Manual page 45

Pin No. Pin Name
85 PLL CE
86 HSTX
87 MD2
88 MD1
89 MD0
90 RESET
91 VSS
92 X0
93 X1
94 VCC
95 PW SEL
96 POL MONO
97 to 99 NC
BAND
100
(9K-10K)
101 NC
102 RAMBU
103 NC
104 LCD CE
105 FLASH W
106 REIN0
107 REIN1
LAMP ON
108
(ILL ON)
109 PW ON
110
FM ON
111 TUN ON
NC
112 to 118
119 VSS
120 NC
I/O
O PLL serial chip enable output to the FM/AM PLL (IC100)
I
Hardware standby input terminal Not used (open)
I
Mode selection input terminal (fixed at "L")
I
Mode selection input terminal (fixed at "H")
I Mode selection input terminal (fixed at "H")
System reset signal input from the reset signal generator (IC801) and reset switch (S900)
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)
I Power select switch (S700) input terminal "L": on (operation mode), "H": off (halt mode)
I
Polar monaural detection signal input terminal Not used (open)
O
Not used (open)
Frequency select switch (S701) input terminal "H": MW 9k step/FM 50k step, "L": MW10k
I
step/FM 200k step Used for the E model only
O Not used (open)
Internal RAM reset detection signal input from the RN5VD23AA (IC802)
I Input terminal to check that RAM data are not destroyed due to low voltage
This checking is made within 100 msec after reset
O
Not used (open)
O Chip enable output to the liquid crystal display driver (IC801)
I
Fixed at "H" in this set
I Rotary encoder (EN801) input for volume/bass/treble/balance/fader control
I Rotary encoder (EN801) input for volume/bass/treble/balance/fader control
Power supply on/off control signal output terminal at the illumination and liquid crystal display
driver (IC801) "H": power on
O
At power select switch (S700) on mode: "H" output at the accessory on
At power select switch (S700) off mode: "H" output at the power on
O Main system power supply on/off control signal output to the BA3918 (IC800) "H": power on
O FM system power supply on/off control signal output to the BA3918 (IC800) "H": FM on
O Tuner system power supply on/off control signal output to the BA3918 (IC800) "H": tuner on
O
Not used (open)
— Ground terminal
O Not used (open)
Function
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