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4-9.
IC PIN FUNCTION DESCRIPTION
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CONTROL BOARD IC801 TMP87C846N-4D22 (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
C6DBUP
O
Relay drive signal output for the +6 dB gain control (for CENTER input signal)
“H”: +6 dB on
2
C12DBUP
O
Relay drive signal output for the +12 dB gain control (for CENTER input signal)
“H”: +12 dB on
3
R6DBUP
O
Relay drive signal output for the +6 dB gain control (for REAR input signal) “H”: +6 dB on
4
R12DBUP
O
Relay drive signal output for the +12 dB gain control (for REAR input signal) “H”: +12 dB on
5
MAINRY
O
Relay drive signal output for the power on/off control “L”: standby mode, “H”: power on
6
OUTDRY
O
Relay drive signal output for the INPUT 1 or 2 signal “L”: INPUT 2, “H”: INPUT 1
7
OUTCRY
O
Relay drive signal output for the output protect “L”: protect, “H”: releasing of protect
8
OUTBRY
O
Relay drive signal output for the BYPASS 2ch input signal “H”: BYPASS 2ch on
9
OUTARY
O
Relay drive signal output for the BYPASS 5.1ch input signal “H”: BYPASS 5.1ch on
10
STANDBY LED
O
LED drive signal output of the STANDBY LED (D809) “L”: LED on
11
INPUT-1 LED
O
LED drive signal output of the input 1 LED (D810) “L”: LED on
12
INPUT-2 LED
O
LED drive signal output of the input 2 LED (D811) “L”: LED on
13
BP-5.1CH LED
O
LED drive signal output of the BYPASS 5.1ch input LED (D812) “L”: LED on
14
BP-2CH LED
O
LED drive signal output of the BYPASS 2ch input LED (D813) “L”: LED on
15
MUTE LED
O
LED drive signal output of the MUTING LED (LED on S802) “L”: LED on
16
VOL LED
O
LED drive signal output of the master volume LED (D815) “L”: LED on
17
TEST
I
Test input terminal (fixed at “L”)
18
RESET
I
System reset signal input from the reset signal generator (IC805) “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
19
XIN
I
Main system clock input terminal (8 MHz)
20
XOUT
O
Main system clock output terminal (8 MHz)
21
VSS
—
Ground terminal
22
VAREF
I
Reference voltage (+5V) input terminal
23
SW4
I
INPUT SELECTOR switch (S801) input terminal “H”: input 1
24
SW3
I
INPUT SELECTOR switch (S801) input terminal “H”: input 2
25
SW2
I
INPUT SELECTOR switch (S801) input terminal “H”: BYPASS 5.1ch input
26
SW1
I
INPUT SELECTOR switch (S801) input terminal “H”: BYPASS 2ch input
27
MUTE
I
MUTING switch (S802) input terminal “L” is input when key pressing
28
W. GAIN
I
WOOFER LEVEL up switch (S805) input terminal “L” is input when key pressing
29
R. GAIN
I
REAR L/R LEVEL up switch (S804) input terminal “L” is input when key pressing
30
C. GAIN
I
CENTER LEVEL up switch (S803) input terminal “L” is input when key pressing
31
W12DBUP
O
Relay drive signal output for the +12 dB gain control (for WOOFER input signal)
“H”: +12 dB on
32
W6DBUP
O
Relay drive signal output for the +6 dB gain control (for WOOFER input signal)
“H”: +6 dB on
33
A-1 IN
I
Sircs remote control signal input for the S-LINK control A1
34
A-1 OUT
O
Sircs remote control signal output for the S-LINK control A1
35
—
I
Not used (fixed at “L”)
36
SIRCS
I
Remote control signal input from the remote control receiver (IC804)
37
VOL+
O
Motor drive signal output to the volume motor drive (IC803) (volume up direction)
38
VOL–
O
Motor drive signal output to the volume motor drive (IC803) (volume down direction)
39
STOP IN
I
Trigger input terminal
40
RCL
O
Serial clock signal output to the EEPROM (IC802)
41
RDT
I/O
Two-way data bus with the EEPROM (IC802)
42
VDD
—
Power supply terminal (+5V)
