Sony MDX-CA680 Service Manual page 47

• MAIN BOARD IC501 MN101C49KTJ (US), MN101C49KTK (AEP, UK) (SYSTEM CONTROLLER)
Pin No. Pin Name
1 VREF–
2 VSM
3 NIL
KEYIN1
4
5 KEYIN0
RCIN0
6
QUALITY
7
8 MPTH
DSTSEL
9
10 VREF+
VDD
11
12 OSCOUT
OSCIN
13
VSS
14
XIN
15
16 XOUT
17 MMOD
LCDSO
18
LCDCE
19
LCDCKO
20
21 to 23 NC
24 SYSRST
25 BUSON
26 KEYACK
27 DAVN
28 BUIN
29
SIRCS
30, 31 NIL
32 NIH
33 RESET
34 NOSESW
35
BEEP
36
NCO
37 TEST IN
38 ACC IN
39 NCO
40
TELATT
41 NIH
I/O
I
Reference voltage (0V) input terminal (for A/D converter)
FM and AM signal meter voltage detection signal input from the FM/AM tuner unit (TU10)
I
(A/D input)
I Not used (fixed at "L")
Key input terminal (A/D input) LSW902, LSW905 to LSW911 (LSW910 and LSW911 are AEP,
I UK models only), S902 to S905 (MENU, SOUND, ENTER, S SCROLL, D DISPLAY, LIST,
AF, TA, > M SEEK +, . m SEEK –, DISC/PRESET +, DISC/PRESET –, )
Key input terminal (A/D input) LSW901, LSW903, LSW904, LSW914 to LSW919, S906, S907
I
(OFF, SOURCE, MODE, 6, 5, 4, 3, 2, 1, D-BASS, MBP)
I Rotary remote commander key input terminal (A/D input)
I Noise level detection signal input at SEEK mode (A/D input)
I Multi-path detection signal input from the RDS decoder (IC51) (A/D input)
I
Destination setting terminal (fixed at "L" in this set)
I
Reference voltage (+5V) input terminal (for A/D converter)
—
Power supply terminal (+5V)
O Main system clock output terminal (18.432 MHz)
I Main system clock input terminal (18.432 MHz)
—
Ground terminal
I
Sub system clock input terminal (32.768 kHz)
O Sub system clock output terminal (32.768 kHz)
I
Selection signal of memory mode input terminal "L":single chip mode (fixed at "L")
O Serial data output to the liquid crystal display driver (IC900)
O Chip enable signal output to the liquid crystal display driver (IC900) "H" active
O Serial data transfer clock signal output to the liquid crystal display driver (IC900)
O Not used (open)
O
Reset signal output to the SONY bus interface (IC505) "L": reset
O Bus on/off control signal output to the SONY bus interface (IC505) "L": bus on
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"
Synchronized detection signal of RDS data block input from the RDS decoder (IC51)
I
"H" active (AEP, UK models only)
Battery detection signal input from the SONY bus interface (IC505)
I
"L" is input at low voltage
I
SIRCS remote control signal input from the remote control receiver (IC971)
I Not used (fixed at "L")
I Not used (fixed at "H")
System reset signal input from the reset signal generator (IC602) and RESET switch (S702)
I
"L": reset "L" is input for several 100 msec after power on, then it changes to "H"
Front panel block remove/attach detection signal input from the nose detection switch (S701)
I
"L": front panel is attached
O Beep sound drive signal output to the power amplifier (IC611)
O Not used (open)
I Setting terminal for the test mode "L": test mode, Normally: fixed at "H"
I Accessory detection signal input "L": accessory on
O
Not used (open)
I Telephone detection signal input terminal At input of "H", the signal is attenuated by –20 dB
I Not used (fixed at "H")
MDX-CA680/CA680X
Description
47