Service manual
051-7287-90 CD74HC4049PWR Hex Inverter
052-3400-00 uPD703275YGJ-503-UEN System Controller
Terminal Description
pin 1 : A Vref 0 : - : Reference voltage for the internal ADC.
pin 2: A VSS : - : Negative voltage supply for analog section.
pin 3 : SYS ACC : O : ACC detect signal output.
pin 4: SYS MUTE : O : System muting signal output.
pin 5 : A Vref 1 : - : Reference voltage for the internal ADC.
pin 6 : RDS CLK : IN : RDS clock pulse input.
pin 7: NU :IN : Not in use.
pin 8: FLASH MD 0 : IN : H = The flash memory writing.
pin 9: VDD : - : Positive voltage supply.
pin 10: RE G C : - : The capacitor connection.
pin 11: VSS : - : Negative voltage supply.
pin 12: X 1 : - : The crystal connection.
pin 13: X 2 : IN : The crystal connection.
pin 14 : RESET : IN : Reset signal input.
pin 15: XT 1 : - : Crystal connection.
pin 16: XT 2 : - : Crystal connection.
pin 17 : ILL DET : IN : Illumination ON signal input.
pin 18 : B/U DET 2 : IN : The backup voltage detect pulse input.
pin 19 : B/U DE T : IN : Backup voltage ON signal input.
pin 20: NU : IN : Not in use.
pin 21: ACC IN : IN : ACC ON flag input.
pin 22 : TUN S DA :I/O: I2BUS serial data input/output for the tun-
er pack.
pin 23: TUN SCL : O : I2BUS serial clock output for the tuner
pack.
pin 24: TP REQ : IN : The request signal from the touch panel
micro computer.
pin 25: FLASH TX : O : The serial data output for the flash mem-
ory.
pin 26: FLASH RX : IN : The serial data input for the flash memo-
ry.
pin 27: TP RESET : O : The reset pulse output to the touch panel.
pin 28: NU : IN : Not in use.
pin 29: SPEED PULSE : IN : The speed pulse input.
pin 30: NU : IN : Not in use.
pin 31: IE BUS TX : O : IE Bus serial data output.
pin 32: IE BUS RX : IN : IE Bus serial data input.
pin 33: E VS S : - : Ground.
pin 34: E V D D : - : The positive supply voltage.
pin 35: T-DSP SDA :I/O: I2BUS serial data input/output for the Ra-
dio-Audio-DSP.
pin 36: T-DSP SCL : O : I2BUS serial clock output for the Radio-
Audio-DSP.
pin 37: MOTOR+ : O : The control signal output to the motor.
pin 38: MOTOR- : O : T h e control signal output to the motor.
pin 39: LCD ILL REM : O : H = LCD back light ON.
pin 40: DISP 5V : O : The power supply ON signal output for the
LCD driver.
pin 41: OFFSET DET : IN : The emergency signal input from the pow-
er IC.
pin 42: OSD WAIT : IN : The wait signal input for the on screen dis-
play IC.
pin 43: OSD CD 0 :I/O: The parallel data input/output for the on
screen display.
pin 44: OSD CD 1 :I/O: The parallel data input/output for the on
screen display.
pin 45: OSD CD 2 :I/O: The parallel data input/output for the on
screen display.
pin 46: OSD CD 3 :I/O: The parallel data input/output for the on
screen display.
pin 47: OSD CD 4 :I/O: The parallel data input/output for the on
screen display.
pin 48: OSD CD 5 :I/O: The parallel data input/output for the on
screen display.
pin 49: OSD CD 6 :I/O: The parallel data input/output for the on
screen display.
pin 50: OSD CD 7 :I/O: The parallel data input/output for the on
screen display.
pin 51: OSD RD : O : The read command output for the on
screen display IC.
pin 52: OSD WR : O : The write command output for the on
screen display IC.
pin 53: REMOCON IN : IN : The input terminal of the internal ADC for
the remote controller.
pin 54: OSD CS : O : The chip select signal output to the on
screen display IC.
pin 55: OS D PS 2 : O : On screen display port select.
pin 56: OS D PS 1 : O : On screen display port select.
pin 57: OS D PS 0 : O : On screen display port select.
pin 58: OSD RST : O : The reset pulse output for the on screen
display IC.
pin 59: T P R X : IN : The serial data input from the touch panel
micro computer.
pin 60: TP TX : O : The serial data output to the touch panel
micro computer.
pin 61: E VOL D ATA : O : The serial data output to the volume IC.
pin 62: E VOL C LK : O : The clock pulse output to the volume IC.
pin 63 : MP3 SRQ : IN : MP3 request signal input.
pin 64 : MP3 CS : O : MP3 chip selection signal output.
pin 65: M P 3 WP : O : MP3 wakeup signal output.
pin 66 : MP3 RESET : O : MP3 reset signal output.
pin 67 : BEEP : O : Beep out.
pin 68: MP3 SI : IN : MP3 serial data input.
pin 69 : MP3 SO : O : MP3 serial data output.
pin 70 : MP3 SCK : O : MP3 clock output.
pin 71 : EXT AMP REM : O : ON signal output to the external Amplifier.
pin 72: INT AMP REM : O : ON signal output to the internal Amplifier.
pin 73: AMP MUTE : O : Muting signal output to the Audio Power
Amplifier.
pin 74: KEY IN T : IN : Key interrupting signal input.
pin 75: OSD I NT 0 : IN : The interrupt signal (vertical) input for the
on screen display.
pin 76: NU : IN : Not in use.
pin77:TFTDDFSW1 :O:
The DC-DC-converter-control-signal output-
terminal for the TFT driving. When the-
switching-frequency is out of the standard
frequency range, this terminal outputs L.
pin 78: DD F SW : O : The frequency control signal output for
DC_DC_Converter.
pin 79: REM +5V : O : Power supply circuit control signal. "H"=
ON.
pin 80: MAIN 0 BIT : O : H = 0 bit muting active.
pin 81: NU : IN : Not in use.
pin 82: NU : IN : Not in use.
pin 83: NU : IN : Not in use.
pin 84: NU : IN : Not in use.
pin 85: EEP D O : O : The serial data output to the EEP-ROM.
pin 86 : CLK out : O : Clock pulse output.
pin 87: EEP SCK : O : The clock pulse output to the EEP-ROM.
pin 88 : EEP CEO : O : The chip enable signal output to the EEP-
ROM.
pin 89: EEP DI :IN : The serial data input from the EEP-ROM.
pin 90: NU : IN : Not in use.
pin 91: DSP 2 Request : O : The request signal output to DSP-2.
pin 92: DSP 2 SCK : O : The clock pulse output to DSP-2.
pin 93: DSP 2 SO : O : The serial data output to DSP-2.
pin 94: NU : IN : Not in use.
pin 95: DSP 2 RDY : IN: The ready signal input to DSP-2.
pin 96: DSP 2 RESET : O : The reset pulse output to DSP-2.
pin 97: DSP 2 INI R ST : O : The initial reset signal output to DSP-2.
pin 98: NU : IN : Not in use.
GND
VCC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
NC
NC
DXZ955MC
DXZ956MC
-7-