- 3 - PN-2445M
ADJUSTMENT
Item Procedure Measuring
instrument
FM noise
convergence
1. Input the 98.1MHz/55dB (1kHz 30% MOD) signal.
2. Adjust the outputs to 18 3dB by VR102 when the SG output is set to 20dB .
SSG
AC volt meter
Clock accuracy 1. Turn off and on the ACC switch twice, while holding the buttons of power switch
and CD eject to make the unit the test mode.
2. Set a universal timer to TP101(T-BASE), adjust TC201 so that a reading of the
meter is 0 0.1 sec./day.
Chronometer
EXPLANATION OF IC
052-1163-20 uPD178076GF-540-3BA CD & Radio System control
1.Terminal Description
pin 1: EJECT SW : IN: Eject switch ON signal input.
pin 2: NU : - : Not in use.
pin 3: NU : - : Not in use.
pin 4: VOL DATA : O : The serial data output to the volume IC.
pin 5: VOL CLK : O : The clock pulse output to the volume IC.
pin 6: VOL CE : O : The chip enable signal output to the vol-
ume IC.
pin 7: NU : - : Not in use.
pin 8: LCD DI : IN: The srial data input from the LCD driver.
pin 9: LCD DO : O : The srial data output to the LCD driver.
pin 10: LCD CLK : O : The clock pulse output to the LCD driv-
er.
pin 11: LCD CE : O : The chip enable signal output to the LCD
driver.
pin 12: NU : - : Not in use.
pin 13: POWER SW : IN : Power switch ON signal input.
pin 14: VOL 1 : IN : Volume control pulse input from the rota-
ry encoder.
pin 15: VOL 2 : IN : Volume control pulse input from the rota-
ry encoder.
pin 16: ILL : IN : Illumination ON signal input.
pin 17: NU : - : Not in use.
pin 18: NU : - : Not in use.
pin 19: NU : - : Not in use.
pin 20: NU : - : Not in use.
pin 21: NU : - : Not in use.
pin 22: NU : - : Not in use.
pin 23: NU : - : Not in use.
pin 24: NU : - : Not in use.
pin 25: NU : - : Not in use.
pin 26: NU : - : Not in use.
pin 27: A VDD : - : Positive supply voltage for the Analog sec-
tion.
pin 28: NU : - : Not in use.
pin 29: NU : - : Not in use.
pin 30: NU : - : Not in use.
pin 31: NU : - : Not in use.
pin 32: A VSS : - : Analog ground.
pin 33: REG CPU : IN : The capacitor connection terminal to sup-
press the ripple.
pin 34: VDD : - : Positive supply voltage.
pin 35: REG OSC : IN : The capacitor connection terminal to sup-
press the ripple.
pin 36: X 2 : - : Crystal connection.
pin 37: X 1 : - : Crystal connection.
pin 38: GND : - : Ground.
pin 39: NU : - : Not in use.
pin 40: GND : - : Ground.
pin 41: AM IF :IN: Input terminal of the internal universal
counter for AM IF.
pin 42: FM IF :IN: Input terminal of the internal universal
counter for FM IF.
pin 43: VDD PLL : - : Positive supply voltage for the PLL.
pin 44: FM OSC : IN : Input terminal of the internal counter for
FM OSC( Local Oscillation ).
pin 45: AM OSC : IN : Input terminal of the internal counter for
AM OSC( Local Oscillation ).
pin 46: GND PLL : - : Ground for the PLL.
pin 47: Voltage Tune : O : PLL error output.
pin 48: NU : - : Not in use.
pin 49: IC : IN: Connected to the ground.
pin 50: RESET : IN: Reset signal input.
pin 51: NU : - : Not in use.
pin 52: NU : - : Not in use.
pin 53: ST/TWEET :I/O: Outputs "L" at AM 900kHz receiving. In-
puts "L" at FM stereo receiving.
pin 54: CLK INT : IN: Without a clock = "H".
pin 55: AUX ON :IN: AUX ON signal input.
pin 56: TEST : - : For the Test.
pin 57: LCD ON : O : LCD back light ON signal output.
pin 58: NU : - : Not in use.
pin 59: BEEP : O : Beep out.
pin 60: NU : - : Not in use.
pin 61: NU : - : Not in use.
pin 62: CD RESET : O : The reset pulse output to the CD IC.
pin 63: NU : - : Not in use.
pin 64: AF MUTE : O : Audio frequency signal muting.
pin 65: NU : - : Not in use.
pin 66: FM ON : O : FM ON signal output.
pin 67: AM ON : O : AM ON signal output.
pin 68: CD ON : O : CD ON signal output.
pin 69: NU : - : Not in use.
pin 70: NU : - : Not in use.
pin 71: NU : - : Not in use.
pin 72: RF MUTE : O : Radio frequency signal muting.
pin 73: DX/LO : O : DX/Local select signal output.
pin 74: SYS ON : O : System ON signal output.
pin 75: AMP ON : O : Audio power amplifier ON signal output.
pin 76: COMBI ON : O : Combi ON signal output.
pin 77: NU : - : Not in use.
pin 78: ACC IN :IN : ACC detection signal intput.
pin 79: RADIO ON : O : Radio ON signal output.
pin 80: NU : - : Not in use.
pin 81: SBSY : IN : Sub code sync input.
pin 82: GND : - : Ground.
pin 83: CD CONNECT :IN : CD connection check signal input.
pin 84: BUS 0 :I/O: CD IC Data input / output.
pin 85: BUS 1 :I/O: CD IC Data input / output.
pin 86: BUS 2 :I/O: CD IC Data input / output.
pin 87: BUS 3 :I/O: CD IC Data input / output.
pin 88: BUS CK : O : Clock pulse output to the CD IC.
pin 89: CCE : O : The chip enable signal output.
pin 90: GS1 TEST : O : Test data output.
pin 91: S STOP :IN : In side limit signal input.
pin 92: CHU SW :IN: CD disc chucking signal input.
pin 93: TR B :IN : Photo sensor signal input from the CD
mechanism.
pin 94: TR A :IN : Photo sensor signal input from the CD
mechanism.
pin 95: LD CONT :IN : Loading control signal input.
pin 96: LD MUTE : O : Muting signal output to the CD mecha-
nism.
pin 97: NU : - : Not in use.
pin 98: BAND SEL : IN : Band selection input.
pin 99: VDD : - : Positive supply voltage.
pin100: GND : - : Ground.