Sony MDX-C8900 Service Manual page 59

Pin No. Pin Name
31 TIRIND
32 LCDINH
33
VSS
34 C
35 AD-ON
36 RE-IN0
37 RE-IN1
38 DVCC
39 DVSS
40 NCO
41 LCDANG
42 AVCC
43 AVRH
44 AVRL
45 AVSS
46 KEYIN0
47 KEYIN1
48 RC-IN0
49 DSTSEL0
50 DSTSEL1
51 DSTSEL2
52 MTP
53
VSM
54 VCC
55 RAMBU
56 POWSEL
57 EQ-SEL
58 TESTIN
59 DOOR-IND
60 TIR-PLAY
61 SUB-SW1
62 SUB-SW0
63 VSS
64 VOLCE
65 ATT
VOLSO/
66
SUBSO
I/O
O Not used (open)
O
Blank indicate control signal output to the liquid crystal display driver (IC900) "L": no display
—
Ground terminal
—
Connected to coupling capacitor for the power supply
A/D converter power control signal output When the KEYACK (pin &§) that controls reference
O voltage power for key A/D conversion input is active, "L" is output from this terminal to enable
the input
I
Dial pulse input of the rotary encoder (RE900)
(for VOLUME/BASS/TREBLE/BALANCE/FADER control)
I
—
Power supply terminal (+5V) (for D/A converter)
—
Ground terminal (for D/A converter)
O Not used (open)
View field angle control signal is output when front panel is fully opened
O
"H": front panel is fully opened
—
Power supply terminal (+5V) (for A/D converter)
I Reference voltage (+5V) input terminal (for A/D converter)
I Reference voltage (0V) input terminal (for A/D converter)
— Ground terminal (for A/D converter)
Key input terminal (A/D input) (LSW900, S900, LSW901 to LSW908) OFF, SEEK/AMS 0
I
= – + + ), MODE, SOURCE, SOUND, DSPL, SHIFT, 1, 2, 3 keys input
Key input terminal (A/D input) (LSW701, LSW909, LSW912 to LSW918)
I
6, LIST, 10, 9, 8, 7, 6, 5, 4 keys input
I Rotary remote commander key input terminal (A/D input)
I
Destination setting terminal Not used (open)
I
Destination setting terminal (fixed at 3/4 voltage)
I Destination setting terminal (US model: fixed at "H", E model: frequency select switch input)
I Not used (open)
I FM and AM signal meter voltage detection input from the FM/AM tuner unit (TU1) (A/D input)
—
Power supply terminal (+5V)
Internal RAM reset detection signal input from the RN5VD33AA (IC503)
I Input terminal to check that RAM data are not destroyed due to low voltage
This checking is made within 100 msec after reset
I Power select switch (SW500) input terminal "L": on (operation mode), "H": off (halt mode)
Equalizer (or DSP) connect detection initial setting input from LINE OUT/IN SELECT switch
(SW400) "L": Equalizer (or DSP) is connected, "H": not connected
I
Input terminal to check that RAM data are not destroyed due to low voltage
When equalizer is connected, the fader is set to center, sub volume becomes same value as main
volume, and the set function is deleted
I Setting terminal for the test mode "L": test mode, Normally: fixed at "H"
LED drive signal output of the illumination LED (LED701, 703) "H": LED on
O
"H" is output to turn on LED when front panel is opened
O
Not used (open)
O
Sub woofer output cut-off frequency select signal output terminal
O
Sub woofer output cut-off frequency select signal output terminal
— Ground terminal
O Chip enable signal output to the main electrical volume (IC400) "H": active
O Audio line muting on/off control signal output terminal "H": muting on
O Serial data output to the main electrical volume (IC400) and sub electrical volume (IC403)
Function
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