Ic Pin Function Description - Sony XR-4759RDS Service Manual

6-1. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD IC501 MN1884820S4G (SYSTEM CONTROLLER)
Pin No. Pin Name I/O
1 TUNMUT O
2 AMPON O
3 ILLON O
4 PW ON O
5 AMPMUT O
6 RC IN1 I
7 VDD –
8 X IN I
9 X OUT O
10 GND –
11 XT IN I
12 XT OUT O
13 EX2 –
14 RESET I
15 RDSCKI I
16 BU IN I
17 KEYACK O
18 VOLSO O
19 VOLCKO O
20 VOLCE O
21 TAPEMUT O
22 LMLOD O
23 LMEJ O
24 AMSON O
25 N ROUT O
26 AMSIN I
27 PLLSO O
28 PLLCKO O
29 PLLCE O
30 RDSSI I
31 AD ON O
32 DOLON I/O
33 MTLON I/O
34 CMON O
35 TAPON O
36 ACCON I
37 PLLSI I
SECTION 6
DIAGRAMS
Tuner muting control pin At muting: "H"
Power amp power supply control pin
Illumination power supply control pin
At PW SEL on: ACC on: "H"
At PW SEL off: Power on: "H"
System power supply control pin
Power amp muting control pin At muting: "L"
Rotary remote commander input pin (A/D input)
Power supply
Main system clock input pin (8 MHz)
Main system clock output pin (8 MHz)
GND
Sub system clock input pin (32.768 kHz)
Sub system clock output pin (32.768 kHz)
Connected to GND
Reset input pin
RDS clock input pin
Back up power supply detection pin
Key acknowledge signal input pin
Data output pin to electrical volume
Clock output pin to electrical volume
Chip enable output pin to electrical volume
Tape muting control pin At muting: "H"
Loading motor control pin (loadig direction)
Loading motor control pin (eject direction)
At AMS: "L"
Forward/reverse control pin
Tape music with/without detection pin "L": with music
PLL data output pin
PLL clock output pin
PLL chip enable output pin
RDS data input pin
Power supply control pin for A/D conversion
DOLBY control input/output pin (Fixed at "H" in this set)
At initial mode: valid/invalid selection input of DOLBY function
At normal mode: DOLBY on/off output
METAL control input/output pin
At initial mode: valid/invalid selection input of METAL function
At normal mode: METAL on/off output "H": on
Capstan motor control pin
Tape power supply control pin
Accessory voltage detection pin
PLL data input pin
– 16 –
Function