Sony STR-NX3 Service Manual - Page 24

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Sony STR-NX3 Service Manual

5-14. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD IC501 M30622MA-A12FP (SYSTEM CONTROLLER )
Pin No.
Pin Name
I/O
Spectrum analyzer drive signal input from the spectrum analyzer band-pass filter (IC401)
1
L+R
I
(for VACS, non-stop signal)
Spectrum analyzer drive (super low frequency) signal input from the spectrum analyzer band-pass
2
BPF SL
I
filter (IC401) (for 40 Hz)
3
F RELAY
O
Speaker protect relay drive signal output for the front side speaker "H": relay on
4
R RELAY
O
Speaker protect relay drive signal output for the rear side speaker "H": relay on
5
SIRCS
I
Remote control signal input from the remote control receiver (IC601)
6
LINE MUTE
O
Line muting on/off control signal output terminal "L": muting on
DBFB normal/high selection signal output to the M62493FP (IC101)
7
DBFB
O
"L": DBFB high, "H": DBFB low/off
8
BYTE
I
External data bus line byte selection signal input terminal Fixed at "L" in this set
9
CNVSS
—
Ground terminal
10
XCIN
I
Sub system clock input terminal (32.768 kHz)
11
XCOUT
O
Sub system clock output terminal (32.768 kHz)
System reset signal input from the reset signal generator (IC502) "L": reset
12
RESET
I
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
13
XOUT
O
Main system clock output terminal (16 MHz)
14
VSS
—
Ground terminal
15
XIN
I
Main system clock input terminal (16 MHz)
16
VCC
—
Power supply terminal (+5V)
17
NMI
I
Non-maskable interrupt input terminal Fixed at "H" in this set
18
WAKE UP
O
Wakeup control signal output to the CPU on the HTC-NX1 "H" active
19
PHONES MUTE
O
Muting on/off control signal output terminal "L": muting on Not used (open)
RDS serial data transfer clock signal input from the tuner pack
20
RDS INT
I
(Used for the AEP and UK models only)
21
RDS DATA
I
RDS serial data input from the tuner pack (Used for the AEP and UK models only)
22
AC CUT
I
AC off detection signal input from the reset signal generator (IC502) "L": AC cut checked
Serial data transfer clock signal output to the M62464FP (IC201)
23
PL CLK
O
(Used for the STR-NX3 only)
24
PL DATA
O
Serial data output to the M62464FP (IC201) (Used for the STR-NX3 only)
25
PL LAT
O
Serial data latch pulse output to the M62464FP (IC201) (Used for the STR-NX3 only)
26
STK POWER
O
Power amplifier on/off selection signal output terminal "L": standby mode, "H": on
SPEAKER
Protect on/off detection signal input from the speaker protect circuit
27
I
PROTECT
"L": protect on, "H": protect off
28
SOFT-TEST
O
Output terminal for the software test Not used (open)
Communication data reading clock signal input or transfer clock signal output with the CPU on
29
IIC CLK
I/O
the HTC-NX1
30
IIC DATA
I/O
Communication data bus with the CPU on the HTC-NX1
31
TXD1
O
Not used (open)
32
RXD1
I
Not used (fixed at "L")
33
CLK1
I
Not used (fixed at "L")
34
RTS1
O
Not used (open)
35
LCD DATA
O
Serial data output to the liquid crystal display unit (LCD601)
36
RXD0
I
Not used (fixed at "L")
37
LCD CLK
O
Serial data transfer clock signal output to the liquid crystal display unit (LCD601)
38
493 LT
O
Serial data latch pulse output to the M62493FP (IC101)
Description
24
Pin No.
Pin Name
I/O
39
CLOCK OUT
O
Output terminal for the clock signal check Not used (open)
40
VC L+R/L–R
O
Virtual cinema L+R/L–R selection signal output terminal Not used (open)
41
XHOLD
I
Not used (fixed at "L")
Liquid crystal display on/off selection signal output terminal "L": on, "H": off
42
LCD SW
O
Not used (open)
Main power on/off control signal output terminal "L": standby mode, "H": power on
43
STBY RELAY
O
(Used for the US, Canadian, AEP and UK models only)
Sync bass frequency normal/high selection signal output to the M62493FP (IC101)
44
BASS FREQ
O
"L": sync bass off (normal), "H": sync bass high Not used (open)
45
OPT SEL
O
Not used (open)
46
XWR
I
Not used (fixed at "H")
47
493 DATA
O
Serial data output to the M62493FP (IC101)
48
493 CLK
O
Serial data transfer clock signal output to the M62493FP (IC101)
49
ST MUTE
O
Tuner muting control signal output to the tuner pack "H": muting on
50
STEREO
I
FM stereo detection signal input from the tuner pack "L": stereo
51
TUNED
I
Tuning detection signal input from the tuner pack "L": tuned
52
ST CE
O
PLL chip enable signal output to the tuner pack
53
ST DOUT
O
PLL serial data output to the tuner pack
54
ST DIN
I
PLL serial data input from the tuner pack
55
ST CLK
O
PLL serial data transfer clock signal output to the tuner pack
56
VC BYPASS
O
Virtual cinema bypass control signal output terminal Not used (open)
PHONES
Connection detect signal input of the headphone jack (J701)
57
I
DETECT
"L": no connected, "H": headphone connected
58
LCD LAT
O
Serial data latch pulse output to the liquid crystal display unit (LCD601)
59
LCD A0
O
Address signal output to the liquid crystal display unit (LCD601)
60
LCD RESET
O
Reset signal output to the liquid crystal display unit (LCD601) "L": reset
61
NC
O
Not used (open)
62
VCC
—
Power supply terminal (+5V)
63
NC
O
Not used (open)
64
VSS
—
Ground terminal
65 to 68
NC
O
Not used (open)
69
JOG B
I
Jog dial pulse input from the rotary encoder (S652 JOG) (B phase input)
70
JOG A
I
Jog dial pulse input from the rotary encoder (S652 JOG) (A phase input)
71
VOL B
I
Jog dial pulse input from the rotary encoder (S651 VOLUME) (B phase input)
72
VOL A
I
Jog dial pulse input from the rotary encoder (S651 VOLUME) (A phase input)
73 to 78
NC
O
Not used (open)
79
LED FUNCTION
O
LED drive signal output of the key illumination indicator (D643 to D648) "H": LED on
80
LED POWER
O
LED drive signal output of the I/1 indicator (D638) "H": LED on
LED drive signal output of the TIMER indicator (D637) "H": LED on
81
LED TIMER
O
(Used for the US, Canadian, AEP and UK models only)
LED drive signal output of the liquid crystal display back light indicator (D639 to D642)
82
LED LCD
O
"H": LED on
83
LED ENTER
O
LED drive signal output of the ENTER indicator (D636) "H": LED on
84
LED JOG
O
LED drive signal output terminal Not used (open)
85
LED CINEMA
O
LED drive signal output terminal Not used (open)
LED drive signal output of the PRO LOGIC indicator (D633) "H": LED on
86
LED DOLBY
O
(Used for the STR-NX3 only)
24
Description