Sony XR-CA350X Marketing s & diagrams, Руководство по обслуживанию

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XR-CA350X
5-7. IC PIN FUNCTION DESCRIPTION
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MAIN BOARD IC1 MN101C49HAS (SYSTEM CONTROLLER)
Pin No. Pin Name I/O Description
1 VREF – — Reference voltage (0V) terminal (for A/D converter)
2 VSM I FM and AM signal meter voltage detection input from the tuner unit (A/D input)
3 to 6 NC I Not used
7 QUALITY I Not used
8 MPTH I Not used
9 NC I Not used
10 VREF + — Reference voltage (+5V) terminal (for A/D converter)
11 VDD — Power supply terminal (+5V)
12 OSC2 O Main system clock output terminal (18.432 MHz)
13 OSC1 I Main system clock input terminal (18.432 MHz)
14 VSS — Ground terminal
15 XI I Sub system clock input terminal (32.768 kHz)
16 XO O Sub system clock output terminal (32.768 kHz)
17 MMOD I
Setting terminal for the single chip mode “L”: single chip (fixed at “L” in this set)
18 LCD-SO (TX) O
LCD serial data output to the liquid crystal display driver
19 LCD-SI (RX) I
LCD serial data input from the liquid crystal display driver
20 LCD-CKO O
LCD serial transfer clock signal output to the liquid crystal display driver
21 to 23 NC O
Not used
24 SYS-RES O
System reset signal output to the SONY bus interface “L”: reset
25 BUS-ON O
Bus interface control signal output to the SONY bus interface “L”: uni-link on
26 KEYACK
I Key acknowledge signal detection input from the liquid crystal display driver
27 DAVN I
Not used
28 BU-IN
I
Battery detection signal input from the bus interface and battery detect circuit
“L” is input at low voltage
29
NC
I
Not used
30 TU-ATTIN I
Tuner muting on/off control signal input from the tuner unit “L”: muting on
31, 32 NC I
Not used
33 RESET I
System reset signal input from the reset signal generator and reset switch “L”: reset
“L”is input for several 100 msec after power on, then it changes to “H”
34 NC O
Not used
35
BEEP O Beep sound drive signal output to the power amplifier “H”: beep on
36
POWER-ON O Main system power supply on/off control signal output “H”: power on
37 ILL-IN
I Illuminate line detection signal input terminal “L”: ill on Not used
38 ACC-IN I
Accessory detection signal input “L”: accessory on
“H” is input for several 200 msec after accessory on, then it changes to “L”
39
NC
O
Not used
40
TEL-ATT I
Telephone muting signal input terminal At input of “H”, the signal is attenuated by –20 dB
Not used
41 NCI
I Not used
42 BUS-SO
O Serial data output to the SONY bus interface
43 BUS-SI
I Serial data input from the SONY bus interface
44 BUS-CKO O Serial data transfer clock signal output to the SONY bus interface
45 I2C-SIO I/O Two-way data bus with the tuner unit and electrical volume
46 NC O Not used
47 I2C-CKO O Serial data transfer clock signal output to the tuner unit and electrical volume
48 AMP-ON O
Standby on/off control signal output to the power amplifier
“L”: standby mode, “H”: amplifier on
49 AMP-ATT O Muting on/off control signal output to the power amplifier “L”: muting on