Diagrams; 3-1. Ic Pin Function Description - Sony TA-EX66 Service Manual

3-1. IC PIN FUNCTION DESCRIPTION

• PANEL BOARD IC101 MB89193A-157 (SYSTEM CONTROLLER)
Pin No. Pin Name I / O
1 MIC-IN I
2 STANBY O
3 K-PON O
4 KEY0 I
5 VSS —
6 RST I
7 XIN I
8 XOUT O
9 VSS —
10 AUB-OUT O
11 AUB-IN I
12 SIRCS-IN I
13 VOL-UP O
14 VOL-DOWN O
–20dB MUTE O
15
16 DIRECT O
17 DBFB LEVEL O
18 MUTE O
19 KEY1 I
20 DBFB ON/OFF O
21 OPEN —
22 VSS —
23 VCC —
ANALOG/
24 I
DIGITAL
25 FUNCA O
26 FUNCB O
27 FUNCC O
28 VCC —
*1
FUNCA
Terminal
Function
(pin @∞)
TAPE "H"
VIDEO 2 "L"
VIDEO 1 "H"
MD "L"
CD "L"
TUNER "H"
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SECTION 3

DIAGRAMS

Plug in detection signal input of the MIX MIC jack (J201)
Insert the microphone plug with the jack when "H"
Power on/off control signal output terminal
Control signal output to the KARAOKE PON circuit
Key input terminal (A/D input)
Ground terminal
Power on reset signal input from the reset signal generator (IC103)
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
System clock input terminal (4 MHz)
System clock output terminal (4 MHz)
Ground terminal
Output terminal of the audio bus signal
Input terminal of the audio bus signal
Sircs signal input from the remote control receiver (IC102)
Motor control signal output to the volume up/down motor driver IC (IC104)
"H": volume up
Motor control signal output to the volume up/down motor driver IC (IC104)
"H": volume down
Control signal output of the –20 dB mute
Control signal output to the SOURCE DIRECT circuit
DBFB level select signal output terminal
Control signal output of the line mute
Key input terminal (A/D input)
–20 dB MUTING, SOURCE DIRECT, KARAOKE PON, DBFB keys (S104 to S107) and rotary
encoder (S110) for the FUNCTION
Control signal output to the DBFB circuit
Not used (open)
Ground terminal
Power supply terminal (+5V)
Digital/analog recording mode select input (ANALOG/DIGITAL select switch (S901) input) of
the AUX/VIDEO 2 IN terminal
(TA-EX77 only)
Function select signal output terminal
Power supply terminal (+5V)
FUNCB FUNCC
(pin @§) (pin @¶)
"H" "H"
"H" "H"
"L" "H"
"L" "H"
"H" "L"
"L" "L"
– 9 –
Function
"H": power on, "L": standby mode
"H": KARAOKE PON on
POWER key (S101) input
"H": –20 dB mute on
"H": SOURCE DIRECT on
"H" : DBFB LOW, "L": DBFB HIGH
"H": line mute on
"H": DBFB off, "L": DBFB on
"H": analog recording mode, "L": digital recording mode
*1
"L": reset