Kenwood KD-CX-659 Service Manual

CD RECEIVER

KDC-MP819/X659/Z838

SERVICE MANUAL

B51-7927-00 (S) 1727

●

This service manual does not include information on the CD mechanism assembly (exploded view, parts list, schematic diagram or mechanism operation description).

For such information, please refer to the CD mechanism assembly service manual (X92-4460-0x: B51-7891-00).

KDC-MP819

Panel assy (A64-2644-11)

KDC-Z838

Panel assy (A64-2649-11)

Plastic cabinet assy (A02-2712-13)

Front glass (B10-4207-01)

Front glass (B10-4212-01)

Escutcheon (B07-3050-02): KDC-MP819/Z838 (B07-3057-02): KDC-X659

KDC-X659

Panel assy (A64-2643-11)

Screw set (N99-1656-05)

Lever (D10-4674-04)x2

Front glass (B10-4206-01)

Screw set (N99-1723-05)

Remote controller assy (A70-2025-05): KDC-X659/Z838

DC cord (E30-6062-05) : KDC-MP819/X659

DC cord (E30-6106-05) : KDC-Z838

Mounting hardware assy (J21-9823-03)

Remote controller assy (A70-2026-05): KDC-MP819

F/E

FM+B

PLL+B

AM+B

E-VOL

MI-COM

ISO AMP

EJECT LED

DSI

4.5V PRE DC/DC

ACC DET

DIMMER

ACC

DIMMER

POWER IC

PRE AMP

PRE OUT

SP OUT

MUTE DRIVER

NOISE BUFFER

ANT-CON

P-CON

IF+B

CD MECHA

AUX

SW OP AMP

E'S

SPEANA AGC OP AMP

MUTE

4.5V

BU DET

BACK UP

EX AMP CONT

RESET

DET

PANEL

KEY ILL

MATRIX

KEY

MI-COM

PANEL

SPEANA BPF

REMO

RESET

REG

BUFFER

3.3V

SERVO AVR

CD5V

BOX

DC/DC

A8V

SW14V

DC/DC REG

BU5V

SW5V

PANEL5V

Q43,44 Q45,46

IC1

IC2

Q36 IC8,Q34

IC5

Q37-42

IC10-12

IC4

Q32,

IC7 33,35

Q15

Q31

Q30

Q14

Q111,112

Q26-29

IC3,Q4-6

IC6,Q16-23

IC23,Q472

A1 Q10-13

Q7,8

Q473,474

IC16305,306

IC1

IC5

IC2

ED1Q1,2

Q7-10

IC3

IC4

IC20

IC21

EEP ROM

IC25

Q101,

EXCEPT KDC-MP819

KDC-MP819 ONLY

SDA SCL

S-METER

SW5V

RDCK

AMAUDIO OUT

BACK UP

DATA H DATA C

MUTE

SDA

RDDA

BU5V

DSI

EJECT G

EJECT R/G

CD/MD

FM AM

BU5V

PRE MUTE

PMUTE

PSTBY

MUTE

BEEP

AUX SW

CD-AUX

E-VOL OUT LEVEL

A8V

IFC OUT

SW5V

A8V

SCL

QUAL

AFS

SERVO

BU5V

Rch Lch

A8V

CD5V

A8V

REQ H RST

REQ C

CH CON

CLK

A8V

-B

BACK UP

BU5VBU5V

MC REQ

SC CON

FL+B

RED

SI2

SI1

CLK

GREEN

KS1-KS4

KR1-KR5

F01-F06

WAVE

P5V

MC CLK

SC REQ

P RST

MC DATA

GCP

LAT

P5V

REMO

FL+B

FAC

P5V

A8V

-B

SERVO

FAC

FL+B

MI-COM

CD5V

MI-COM

SW5V

MI-COM

BU5V

P5V

MI-COM

613mV274mV

2005mV

3795mV

1.8V PRE

896mV

1695mV

KDC-X659 (K)

4.5V PRE

AUX

CHANGER

4.5V PRE

CD/MD

CHANGER

AUX

896mV 274mV

1695mV

2005mV

613mV

3795mV

1.8V PRE 1.8V PRE

3717mV

1964mV

CD/MD

CHANGER

FM AM

AUX 4469mV

722mV

2361mV

4.5V PRE

600mV

QUAL

E'S OUT LEVEL PRE OUT LEVEL

M RST

SW1 SW2

SW4

SW3 LO/EJ M STOP

M SW

MUTE R

MUTE L

KDC-MP819 (K)

KDC-Z838 (M)

KDC-MP819 (K)

KDC-Z838 (M)

KDC-X659 (K)

KDC-Z838 (M)

KDC-X659 (K)

KDC-MP819 (K)

251mV (M)TYPE

470mV (K)TYPE

215mV

1200mV

KDC-MP819/X659/Z838

BLOCK DIAGRAM

KDC-MP819/X659/Z838

COMPONENT DESCRIPTION

● SWITCH UNIT (X16-168X-XX)

Ref.No. Component Name Application/Function Operation/Condition/Compatibility

IC1 TAR5S33 FL AVR +3.3V Output IC2 TC74HC4050AFT Buffer For FL control lines, 5V → 3.3V logic level shifting IC3 RS-171 Remote sensor IC IC4 BA3830F BPF IC BPF for the spectrum analyser indicator IC5 UPD703032GFA04 Panel MI-COM.

Q1 Q2

Q3 Q4

Q6 Q7 2SC4081 V-I converter Current driver for green LEDs Q8 2SC4081 V-I converter Current driver for red LEDs Q9

Q10

DTA144EUA or UN5113 DTC114YUA or UN5214

DTA114EUA or UN5111 DTC114EUA or UN5211

DTC114YK or UN2214

DTA114EUA or UN5111 DTA114EUA or UN5111

FL+B SW

REMO SW FL blanking SW When a base goes Hi, Q4 is turned on, and FL indicator is lit.

SRC key illumination SW

Key illumination Red SW Key illumination Green SW

● ELECTRIC UNIT (X25-9240-XX)

Ref.No. Component Name Application/Function Operation/Condition/Compatibility

IC1 UPD703033GFA17 System MI-COM. IC2 TDA7407 E-VOL.& N.C. MPX IC3 M5237ML AVR IC IC4 TDA7560 Power IC

IC5 TDA7401 IC6 ICL7660SIBA DC/DC converter -9V AVR for pre-output amplifier

IC7 TC74HC02AF Mute logic 2-input NOR x 4

IC8 NJM4565M-TE2 Op. amp. IC10 NJM4565M-TE2 Op. amp. Amplifier for the front pre-outputs IC11 NJM4565M-TE2 Op. amp. Amplifier for the non-fader pre-outputs IC12 NJM4565M-TE2 Op. amp. Amplifier for the rear pre-outputs IC16 S-80837ANNP Reset IC When BU 5V voltage is less than 3.7V, IC outputs Lo. IC20 BA3121F Isolation amplifier AUX inputs isolation amplifier IC21 BA3129F Switched op.amp. Input switching with AUX inputs and CD inputs IC23 SI-8050JD MECHA. AVR DC/DC converter, +5V output for CD mechanism adapted for MP3 IC25 BR24C02F-W EEPROM

Q1 2SD2375 CD servo AVR AVR for CD mechanism servo operation, +7.5V output. Q3 2SA1037K SW 5V Q4 2SA2057 A.+8V AVR

Q5 Q6 Q7 Q8

Q9 2SB1427 PAN5V SW

Q10 2SA2057 Q11 2SC4081 Q12 Q13 Q14 Q15 Q16 2SB1443 Q17 2SC4081

DTC144EUA or UN5213 DTA124EUA or UN5112 DTA124EUA or UN5112 DTC124EUA or UN5212

DTC124EUA or UN5212 DTA124EUA or UN5112 DTA123JK or KRA105S DTC144EUA or UN5213

High pass filter & Non-Fader volume

A.+8V AVR SW When Q5's base goes Hi, Q6 is turned on, and A.+8V AVR is working.

SW14V

FL/Illumination AVR When Q11's base goes Hi, AVR outputs +9V.

FL/Illumination AVR SW EXT. AMP CON. SW

Dimmer detection SW A.+10V AVR When Q17's base goes Hi, AVR outputs +10V.

FL & Illumination +B ON/OFF control. When Q2's base goes Hi, Q1 is turned on, and FL+B(45V) line is supplied to the FL indicator and the key illumination circuit. When a base goes Lo, Q3 is turned on, and PAN5V line is supplied to IC3 and IC4.

When a base goes Hi, Q6 is turned on, and SRC illumination is lit.

When a base goes Lo, Q9 is turned on, and key illumination Red is lit. When a base goes Lo, Q10 is turned on, and key illumination Green is lit.

IC is combined with Q4, and it works as the error detection, the Q4's driver.

HPF(Front/Rear output), LPF, Non-Fader switching and volume function

Amplifier for the spectrum analyser and generation of Vref. (1/2Vcc) voltage

While a base goes Lo, SW 5V is supplied to the microprocessor peripheral circuits. Q4 is combined with IC3, and it works as the power supply of +8.0V output.

When Q8's base goes Hi, Q7 is turned on, and A.+8V AVR, CD servo AVR and A.+10V AVR are working. For PAN5V on/off switching. When a base goes Lo with panel attached to the set, Q9 is turned on, and PAN5V is supplied to the panel.

When Q12's base goes Hi, Q13 is turned on, and FL/Illumination AVR is working. When a base goes Lo, Q14 is turned on, and control pulse signal is outputted. When vehicle small lamps turn on, Q15's base goes Hi, and it is turned on.

KDC-MP819/X659/Z838

COMPONENT DESCRIPTION

Ref.No. Component Name Application/Function Operation/Condition/Compatibility

Q18 2SA1576A Q19 2SC4081 PRE-AMP -9V AVR Q20 2SA1576A Q21 2SC4081 Q22 2SC4081 PRE-AMP +9V AVR Q23 2SA1576A Q26 2SB1277(Q,R) Q29 Q27 2SA1576A P-CON. protection SW Protect Q26 by turning ON when P-CON output is grounded. Q28

Q30 2SC4081 BU detection SW When momentary power down has detected, a base goes Lo, and

Q31 2SC4081 ACC detection SW While ACC is applied, a base goes Hi, and Q31 is turned on. Q32 Q33 Q34 2SC4081

Q35 Q36

Q37 Q38 Q39 Q40 Q41 Q42 Q43 Q44 CPH3105 the F/E. Works during FM reception mode or RDS reception mode. Q45 Q46 CPH3105 the F/E. Works during AM reception mode.

Q101 Q103 Q111 2SB1277(Q,R)

Q112 Q305

Q306 Q472

Q473 2SC4081 Q474 2SB1548(P) Q473 and Q474 are inverted Darlington connection.

DTC114YUA or UN5214

DTA124EUA or UN5112

DTA124EUA or UN5112 DTA124EUA or UN5112

DTC124EUA or UN5212 DTC143TUA or UN5216

DTC143TUA or UN5216 DTC143TUA or UN5216 DTC143TUA or UN5216 DTC143TUA or UN5216 DTC143TUA or UN5216 DTC143TUA or UN5216 DTC124EUA or UN5212

DTC124EUA or UN5212

DTA114YUA or UN5114 DTC124EUA or UN5212

DTC114YUA or UN5214 DTA114YUA or UN5114

DTA114YUA or UN5114 DTC144EUA or UN5213

P-CON SW

P-CON. protection inhibit SW

Mute driver for R Ch. When BU detection SW or System RESET or MI-COM.'s MUTE is Mute driver for L Ch. working, a base goes Lo, and Q32 and Q33 are turned on. AGC for spectrum analyser

E. VOL. mute SW Noise buffer

Audio mute SW (Front L) Audio mute SW (Front R) Audio mute SW (Non Fader R) Audio mute SW (Non Fader L) Audio mute SW (Rear L) Audio mute SW (Rear R)

FM+B SW

AM+B SW DSI LED SW AUX/CD selector SW

P-ANT SW

EJECT LED SW

EJECT LED SW MECHA. AVR SW BU 5V AVR

Q18 and Q20 work as a differential amplifier, Q19 works as a driver, and -9.3V is supplied to OP AMP.

Q21and Q22 work as a differential amplifier, Q23 works as a driver, and +9.7V is supplied to OP AMP.

When Q29's base goes Hi, Q26 is turned on, and P-CON signal is outputted. Works during POWER ON mode.

Prevents Q27 tuning ON during start-up after power ON. While BACKUP is applied, a base goes Hi, and Q30 is turned on.

Q30 is turned off.

When BU detection SW or MI-COM.'s mute is working, a base goes Hi, and Q35 is turned on.

When Q37's base goes Hi, Pre-output is muting. When Q38's base goes Hi, Pre-output is muting. When Q39's base goes Hi, Pre-output is muting. When Q40's base goes Hi, Pre-output is muting. When Q41's base goes Hi, Pre-output is muting. When Q42's base goes Hi, Pre-output is muting. When Q43's base goes Hi, Q44 is turned on, and A.+8V is supplied to

When Q45's base goes Hi, Q46 is turned on, and A.+8V is supplied to

When a base goes Lo, Q101 is turned on, and DSI illumination LED is lit. When a base goes Hi, AUX inputs are selected. When a base goes Lo, CD inputs are selected. When Q112's base goes Hi, Q111 is turned on, and P-ANT signal is outputted. Works during FM/AM reception mode or RDS reception mode. When a base goes Lo, Q305 is turned on, and EJECT illumination LED is lit. When a base goes Lo, Q306 is turned on, and EJECT illumination LED is lit. When a base goes Hi, Q472 is turned on, and MECHA. AVR operation stops. While BACKUP is applied, AVR outputs +5V.

KDC-MP819/X659/Z838

MICROCOMPUTER'S TERMINAL DESCRIPTION

● IC5 (SWITCH UNIT : X16-168X-XX)

Pin No.

17-19 NC O Not used(N.C.)

22-33 NC O Not used(N.C.)

42-47 NC O Not used(N.C.)

50-55 NC O Not used(N.C.)

60-71 NC O Not used(N.C.)

Pin Name I/O Description Processing Operation

1 SC DATA I/O Data input/output with the system MI-COM.

2 MC CLK I Clock input from the system MI-COM.

3 NC O Not used(N.C.)

4 DATA 1 O Data output 1 to the FL driver IC

5 CLK O Clock output to the FL driver IC (Data shift by the rise edge of the pulse)

6 NC O Not used(N.C.)

7 DATA 2 O Data output 2 to the FL driver IC

8 CLK IN I Clock input from the FL driver IC (Data shift by the rise edge of the pulse)

9 EVDD - Positive power supply connection terminal Connected to P5V lines. 10 EVSS - Ground connection terminal Connected to GND lines.

11 RED LED O

GREEN LED

13 REMO I Data input from the remote control light sensor 14 LATCH O Latch output to the FL driver IC Lo: Latch, Hi: Through 15 GCP O Control pulse output to the FL brightness

16 REMO ON I/O

20 BLK O Display ON/OFF control output Lo: Display OFF, Hi: Display ON 21 TEST I Test terminal Not used(Connected to GND lines)

34 RESET I Reset terminal Lo: Reset, Hi: Reset release 35 XT1 - Sub clock resonator connection terminal Not used(Pull down to GND lines) 36 XT2 - Sub clock resonator connection terminal Not used(N.C.)

37 REGC 38 X2 - Main clock resonator connection terminal

39 X1 - Main clock resonator connection terminal 40 VSS - Ground connection terminal Connected to GND lines. 41 VDD - Positive power supply connection terminal Connected to P5V lines.

48 FL +3.3V O FL VDD ON/OFF output Lo: OFF, Hi: ON 49 FL+B I/O FL+B ON/OFF output Hi-Z: OFF, Hi: ON

56 BLUE LED I/O Source key LED ON/OFF output Hi-Z: OFF, Hi: ON 57 NC O Not used(N.C.) 58 BVDD - Positive power supply connection terminal Connected to P5V lines. 59 BVSS - Ground connection terminal Connected to GND lines.

72 SA RESET O Reset output to the BPF IC Hi: Reset 73 NC O Not used(N.C.) 74 AVDD 75 AVSS - A/D converter ground connection terminal Connected to GND lines. 76 AVREF - A/D converter reference voltage input terminal 77 F01 I BPF(63Hz) input 78 F02 I BPF(150Hz) input 79 F03 I BPF(330Hz) input 80 F04 I BPF(1kHz) input 81 F05 I BPF(3.3kHz) input 82 F06 I BPF(10kHz) input 83 WAVE IN I Audio input 84 KR5 I Key return 5 input 85 KR4 I Key return 4 input 86 KR3 I Key return 3 input 87 KR2 I Key return 2 input

Illumination red ON/OFF output in case of two colours /Illumination ON/OFF output in case of one colour Illumination green ON/OFF output in case of two colours

/Not used in case of one colour

Power supply ON/OFF output to the remote control light sensor IC and BPF IC

Capacitor connection terminal for regulator inside microprocessor

A/D converter positive power supply connection terminal

Lo: ON, Hi: OFF Lo: ON, Hi: OFF in case of two colours

/Not used(N.C.) in case of one colour

Lo: ON, Hi-z: OFF

Connected to P5V lines.

KDC-MP819/X659/Z838

MICROCOMPUTER'S TERMINAL DESCRIPTION

Pin No.

Pin Name I/O Description Processing Operation

88 KR1 I Key return 1 input 89 SC REQ O 90 NC O Not used(N.C.) 91 SC CON I Control input from the system MI-COM. Hi: Operation mode 92 NC O Not used(N.C.) 93 SOURCE I Source key input Lo: Key OFF, Hi: Key ON 94 VREF CON O A/D converter reference voltage control output Hi: Active, Connected to AVREF terminal 95 MC REQ I 96 KS4 I/O Key scan output 4 97 KS3 I/O Key scan output 3 98 KS2 I/O Key scan output 2 99 KS1 I/O Key scan output 1

100 MC DATA I Data input from the system MI-COM.

Communication request output to the system MI-COM.

Communication request input from the system MI-COM.

Lo: Standby, Hi: Request

Hi: Request

● IC5 (ELECTRIC UNIT: X25-9240-XX)

Pin No.

Pin Name I/O Description Processing Operation

1 MC DATA I/O Data input/output with the panel MI-COM. 2 MC CLK O Clock output to the panel MI-COM.

Lo: DSI ON, Hi-Z: DSI OFF

3 DSI GUIDE I/O DSI control output

EJECT KEY G

EJECT KEY R/G MC REQ

/FLIP DET /Flip detection input /Lo: Panel detached, Hi: Panel attached 7 IC2 SDA I/O Data input/output with IC2, IC5, and IC25 8 IC2 SCL I/O Clock input/output with IC2, IC5, and IC25 9 EVDD - Positive power supply connection terminal Connected to BU 5V lines.

10 EVSS - Ground connection terminal Connected to GND lines. 11 PAN RESET O Reset output to the panel MI-COM. Lo: Reset or Momentary power down detected 12 BEEP O BEEP output 13 REMO I Data input from the wired remote control 14 SVR O SVR output Not used(N.C.) 15 DIMMER I Small lights detection input Lo: During vehicle small lamps turn on 16 PLL DATA I/O Data input/output with F/E 17 PLL CLK I/O Clock input/output with F/E 18 P-STBY O POWER IC STBY output

19 P-CON I/O P-CON output

20 ANT-CON O ANT-CON output 21 TEST - Test terminal Not used(Connected to GND lines) 22 P MUTE O POWER IC mute output

23 PAN5V I/O Panel 5V control output

EXT-AMP-CON

CD MECHA+B

26 EMUTE O Not used(N.C.) 27 BU DET I Momentary power down detection input

O Eject key illumination green control output Lights on at the panel tilted during POWER ON

O Eject key illumination red/green control output

Communication request output to the panel MI-COM.

I/O

O External amp. control output (in 200msec) Bass boost LOW__Hi: 130msec, Lo: 70msec

I/O CD4.7V ON/OFF output

Lights on at the panel tilted during POWER ON mode. Flashing at the panel detached during POWER ON mode. Lo: ON, Hi-Z: OFF

mode in case of the key illumination green. Lo: ON, H-Z: OFF Lights on at the panel tilted during POWER ON mode. Hi: Request

Lo: Power IC OFF, Hi: Power IC ON or ALL OFF mode Hi-Z: POWER OFF mode or ALL OFF mode, Hi: POWER ON mode Hi: During TUNER mode or last FM mode with RDS/RBDS model

Lo: Muting during POWER OFF mode, ALL OFF mode and TEL MUTE ON Lo: Panel attached normally, Hi-Z: Panel detached or tilted Bass boost OFF__Hi: 160msec, Lo: 40msec

Bass boost HI__ Hi: 100msec, Lo: 100msec Lo: During CD source selected, Hi-z: Except CD source selected

Lo: BU ON, Hi: When momentary power down detected or BU OFF

KDC-MP819/X659/Z838

MICROCOMPUTER'S TERMINAL DESCRIPTION

Pin No.

Pin Name I/O Description Processing Operation

28 ACC DET I ACC detection terminal Lo: ACC ON, Hi: ACC OFF 29 SW5V I/O SW5V control terminal Lo: SW5V ON, Hi-Z: SW5V OFF 30 MUTE I/O MUTE output Lo: Muting OFF, Hi-Z: Muting ON 31 O CE I/O External display CE terminal 32 O CLK I/O External display clock terminal 33 O DATA I/O External display data terminal 34 RESET I Reset input Lo: System reset , Hi: Normal operation 35 XT1 I Sub clock resonator connection terminal Clock count during POWER OFF mode 36 XT2 - Sub clock resonator connection terminal

37 REGC -

38 X2 - Main clock resonator connection terminal

39 X1 I Main clock resonator connection terminal 40 VSS - Ground connection terminal Connected to GND lines. 41 VDD - Positive power supply connection terminal Connected to BU 5V lines. 42 CLKOUT O Internal system clock output Not used(N.C.) 43 NC O Not used(N.C.) 44 E2PDET I EEPROM detection input Lo: No EEPROM, Hi: With EEPROM

PRE MUTE L

PRE MUTE R

47 DSP DATA O Data output to DSP IC Not used(N.C.) 48

DSP LATCH

49 DSP CLK O Clock output to DSP IC Not used(N.C.)

50 AFS O Noise detection time constant switching terminal

51 AM+B I/O AM+B control Hi: During AM reception 52 FM+B I/O FM+B control

53 R QUAL I Quality input from the RDS decoder IC

54 R DATA I Data input from the RDS decoder IC 55 IC2TYPE0 I IC2 setting terminal Lo: Initial value(default)

56 IC2TYPE1 I IC2 setting terminal Lo: Initial value(default) 57 P ON I/O SW 14V control output Hi-Z: POWER OFF mode, Hi: POWER ON mode 58 BVDD - Positive power supply connection terminal Connected to BU 5V lines. 59 BVSS - Ground connection terminal Connected to GND lines. 60 TYPE0 I Destination type selection terminal 0 61 TYPE1 I Destination type selection terminal 1 62 TYPE2 I Destination type selection terminal 2 63 TYPE3 I Destination type selection terminal 3 64 AUX SW O CD/AUX input switching output Lo: Except AUX input, Hi: AUX input 65 ILL ON I/O FL/Illumination AVR ON/OFF control output Hi-Z: AVR OFF, Hi: AVR ON 66 MOSW O CD mechanism loading motor control output Hi: CD loading/eject action or Break, Lo: Other 67 LO/EJ I/O CD mechanism loading/Eject switching output Lo: Loading, Hi: Eject, Hi-Z: Stop or Break 68 M STOP O Stop request to CD mechanism MI-COM. Lo: Stop mode, Hi: Operation mode 69 M RST O Reset output to CD mechanism MI-COM. Lo: Reset 70 CH CON O Changer control Lo: Standby mode, Hi: Operation mode 71 CH RST O Reset output to changers : Reset 72 CH REQH O Request output to changers Lo: Request 73 AVCONT O A/D converter reference voltage control output Hi: Active, Connected to AVREF terminal

Capacitor connection terminal for regulator inside microprocessor

Oscillation: POWER ON mode, Oscillation stop: POWER OFF mode or momentary power down detected

Lo: When M MUTE L input is Lo during CD source

O Pre-out muting L Ch. control output

O Pre-out muting R Ch. control output

O Latch output to DSP IC Not used(N.C.)

selected or Momentary power down detected, Hi: Fix in the case of 2 zone mode Lo: When M MUTE R input is Lo during CD source selected or Momentary power down detected, Hi: Fix in the case of 2 zone mode

Lo: During FM seek or AF search, Hi: During FM reception, Hi: During last FM mode with RDS/ RDBS model

Hi: During FM reception, Hi: During last FM mode with RDS/RDBS model Except RDS, RBDS model: Not used(pull down to GND lines) Except RDS, RBDS model: Not used(pull down to GND lines)

KDC-MP819/X659/Z838

MICROCOMPUTER'S TERMINAL DESCRIPTION

Pin No.

80,81 NC I Not used(Pull down to GND lines)

Pin Name I/O Description Processing Operation

74 AVDD 75 AVSS - A/D converter ground connection terminal Connected to GND lines. 76 AVREF I A/D converter reference voltage input terminal 77 IFC OUT I F/E IFC OUT input terminal Hi: Station detected (Vth=2.5V) 78 S METER I S-meter input from F/E 79 NOISE I FM noise detection input

82 CD SW2 I 12cm disc detection SW input Lo: 12cm disc detected 83 M MUTE R I 84 M MUTE L I 85 CD SW3 I Down & limit switch detection input Hi: Chucking, Hi → Lo: Pickup most inner position 86 PANEL DET I Panel detection input Lo: Panel attached, Hi: Panel detached 87 CH MUTE I Mute request from changers Hi: Mute request 88 PHONE I PHONE detection input 89 SC CON O Control output to the panel MI-COM. Hi: Operation mode 90 SOURCE I/O SOURCE key detection input Not used(N.C.) 91 CD SW1 I Loading SW detection input Lo: Loading start 92 CD SW4 I/O 8cm disc detection SW input Not used(N.C.)

93 R CLK I Clock input from the RDS decoder IC 94 CH REQC I Communication request input from changers Lo: Request

95 EJECT I EJECT key detection input Lo: When EJECT key is pressed 96 SC REQ I 97 CH DATAC I Data input from changers 98 CH DATAH O Data output to changers 99 CH CLK I/O Clock input/output with changers

100 SC DATA I Data input from the panel MI-COM.

A/D converter positive power supply connection terminal

Mute request (R Ch.) from CD mechanism MI-COM. Mute request (L Ch.) from CD mechanism MI-COM.

Communication request input from the panel MI-COM.

Connected to BU 5V lines.

Lo: Mute request Lo: Mute request

1V or less: TEL MUTE, 2.5V or greater: NAVI MUTE

Except RDS, RBDS model: Not used(pull down to GND lines)

Hi: Request

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