CLARION 28185 EH10A
Service Manual

EXPLANATION OF IC
052-3188-83 M30853FHGP Audio CPU Terminal Description pin 1: CTRST pin pin pin pin pin pin pin pin 2: SPEED 3: EEP/ST DA 4: EEP/ST CK 5: BU DET 6: GND 7: CN VSS 8: ILL ON 9: SYS ON

: O : Contrast adjustment analogue output(DA). : IN : Speed Pulse input. :I/O: The serial data input/output for EEP and Sub-tuner. : O : The serial clock output for EEP and Subtuner. : IN : Backup detection signal input. : - : Ground. : IN : Connect to VSS. : IN : Illumination ON signal input. : O : System ON signal output. : IN : Reset signal input. : O : Crystal connection. : - : Negative voltage supply. : IN : Crystal connection. : - : Positive voltage supply. : IN : Connect to VDD. : IN : ACC ON flag input. : O : Not in use. : O : Not in use. : IN : Time base input. : O : Not in use. : IN : M-CAN serial data input. : O : M-CAN serial data output. : O : BEEP out or the buz control. : O : AMP ON signal output. : O : PWM output. : O : The clock pulse output to EEP/Main-tuner. : O : The serial data output to EEP/Main-tuner. : O : The serial data output for NDS. : IN : The serial data input for NDS. : IN : NDS request signal input. : O : NDS/Automatic-changer select. : O : The serial data output for 1-CD & 6-CDChanger.

pin 55: KEY/LCD S/R pin 56: VOL-2 pin 57: VOL-1 pin 58: NC pin 59: NC pin 60: VDD pin 61: POWER-ON pin 62: GND pin 64: RTLY-VOL1 pin 65: MD WP pin 66: MD XCS pin 67: MD XSCK pin 68: CPU-MD pin 69: MD RESET pin 70: MD XSRQ pin 71: NC pin 72: MD DI

: O : KEY IC Standby output / LCD IC Reset output. : IN : The volume pulse input. : IN : The volume pulse input. : O : Not in use. : O : Not in use. : - : Positive voltage supply. : - : POWER-KEY. : - : Ground : IN : Rotary volume pulse input. : O : MD wakeup, H = WAKE-UP, L = SLEEP. : O : MD chip select , H = CS ON. : O : MD clock. : O : The serial data output to MD. : O : L = RESET ON. : IN : MD request. : O : Not in use. : IN : The serial data input from MD. ing beginning of L. put. And RDS clock in-

pin 63: RTLY-VOL2/TH : IN : Rotary volume pulse input / temperature.

pin 10: RESET pin 11: X out pin 12: VSS pin 13: X IN pin 14: VDD pin 15: NMI pin 16: ACC IN pin 17: NC pin 18: NC pin 19: TB pin 20: NC pin 21: M CAN RX pin 22: M CAN TX pin 24: BEEP/BUZ pin 25: AMP ON pin 26: DIMMER pin 27: EEP/MT CK pin 28: EEP/MT DA pin 29: NDS TX pin 30: NDS RX pin 31: NDS REQ 1 pin 32: NDS CONT pin 33: 1&6-CD TX

pin 73: MD LD/RDS CK : IN : MD loading start signal input, DISC load-

pin 74: MD ON/RDS DI : O : MD power supply control, H = Power ON. pin 75: NC pin 76: ST/SD/TWEET : O : Not in use. And RDS data input. :I/O: At AM station receiving, this port outputs "L" by AM 900kHz receiving. At FM station receiving, this port detects the stereo signal. And at seeking or scanning, this port detects the SD signal. : IN : The interrupt command input from the DSP IC. : O : Reset signal output to the DSP IC. : IN : The input terminal of internal A/D converter to monitor the radio field strength. : IN : Serial data input from the PLL IC. : O : The chip enable signal output to the PLL IC. : O : Serial data output to the PLL IC. : O : The clock pulse output to the PLL. : IN : Serial data input from the PLL IC. : IN : Station detection signal input.

pin 23: Power IC Stndb : O : The standby signal output to Power IC.

pin 77: DSP INT pin 78: DSP RESET pin 79: S METER pin 80: PLL DI pin 81: VFM PLL CE pin 82: VFM PLL DO pin 83: VFM PLL CK pin 84: VFM PLL DI pin 85: VFM SD

pin 34: 6-CD RX / CK :I/O: The serial data input for 6-CD-Changer. Or clock pulse output for 1-CD. pin 35: NDS REQ 2 pin 36: NDS S-CHG pin 37: NC pin 38: NC pin 39: WRITE ONLY pin 40: NC pin 41: NC pin 42: NC pin 43: 1-CD RX pin 44: 1&6-CD REQ pin 45: 1-CD CS pin 46: 1-CD WUP pin 47: 1-CD RESET pin 48: CD ON pin 50: LCD ON pin 51: KEY/LCD DO pin 53: KEY/LCD DI pin 54: KEY/LCD CE : IN : NDS request signal input. : O : N-BUS audio signal select command output. : O : Not in use. : O : Not in use. : - : WRITE ONLY. : O : Not in use. : O : Not in use. : O : Not in use. : IN : The serial data input from 1-CD. : IN : The request signal input from 1-CD & 6CD-Changer. : O : The chip select signal output. : O : The wakeup signal output. : O : The reset signal output. : O : CD ON signal output. : O : LCD ON signal output. : O : Serial data output for KEY IC or LCD IC. : IN : Serial data input for KEY IC or LCD IC. : O : Chip Enable output for KEY IC or LCD IC.

pin 86: VFM S METER : IN : The input terminal of internal A/D converter to monitor the radio field strength. pin 87: MD EJ/6-CD LD : IN : MD eject signal input. And 6-CD-Changer loading start signal input. pin 88: CD EJECT pin 89: PLL CK pin 90: PLL DO pin 91: PLL CE pin 92: N REMO B pin 93: N REMO A pin 94: A GND pin 95: NC pin 96: Vref pin 97: A VCC : IN : CD eject signal input. : IN : PLL clock input. : O : Serial data output to the PLL IC. : O : The chip enable signal output to the PLL IC. : IN : The input terminal of internal ADC for Nremote-controller signal. : IN : The input terminal of internal ADC for Nremote-controller signal. : - : Analog ground. : O : Not in use. : - : Reference voltage. : - : Positive voltage supply for the internal analog section.

pin 49: Power IC Diag : IN : Power IC Diagnosis signal input.

pin 98: DSP/PIC/RDS C: IN : The clock pulse input. pin 99: DSP/PIC/RDS D: IN : The serial data input. pin 100: ANT ON : O : Antenna ON command output.

pin 52: KEY/LCD CLK : O : Clock output for KEY IC or LCD IC.

PN-2714B-B

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