Kenwood GX-201KHF2, GX-201LHF2 Service Manual

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Page 1

CD & HEATER CONTROL RECEIVER

GX -201 KHF2/LHF2 /RHF2/SHF2

SERVICE MANUAL (TENTATIVE

SUBARU GENUINE

GX-201LHF2

COMPACT

DIGITALAUDIO

VOL ADJ

REG

TUNE

TRACK

Model Model Name Parts No. Destination GX-201LH GX-201LHF2 86201AG400 Europe (left-hand-drive cars) GX-201RH GX-201RHF2 86201AG300 Europe (right-hand-drive cars) GX-201KH GX-201KHF2 86201AG200 Other Areas (right-hand-drive cars) GX-201SH GX-201SHF2 86201AG500 Other Areas (left-hand-drive cars)

Panel assy ( - )*

CHR

LOCAL

SCAN

RDM

)

GX-201RHF2

COMPACT

DIGITALAUDIO

CHR FM

LOCAL

SCAN

RDM

Panel assy ( - )*

ANTI-THEFT SYSETM

REG

TUNE

TRACK

VOL ADJ

GX-201SHF2

COMPACT

DIGITALAUDIO

SCAN

TUNE

TRACK

MODE

A/COFF

A/C OFF

Panel assy ( - )*

GX-201KHF2

COMPACT

DIGITALAUDIO

CHR FM

MODE

A/COFF

* Part number of panel assy is undecided.

The knobs with numbers larger than 700 on exploded view are not supplied for service parts because it is difficult to apply grease. Please change to panel assy (PA1) when you need repair to the knob.

DC cord for service : E30-3801-15 Antenna connector replacement cord for service : E30-6255-05

CHR

MODE

A/C OFF

Panel assy ( - )*

TUNE

TRACK

SCAN

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GX-201KHF2/LHF2/RHF2/SHF2

BLOCK DIAGRAM

(X14- ) (X89-254)

FM/AM ANT

CD SERVO AVR

IC11

FM DIVERSITY

DC/DC

A3 IC12

FA/AM TUNER (FRONT END)

(2-73,

2-74)

ONLY

IC13,

RDS MUTE

AM NOISE CANCELLER

IC22

E-VOL/ SIGNAL PROCESSOR IC

AVR

A1 A2

DC/DC AUDIO HEAT CONTROL

IC23

FRONT

NAVI SW

REAR

CD MECHA

X81

OSC

12.582MHz

(X25-929)

DC/DC AVR

DC/DC

IC81

SYSTEM u-COM

IC82

RESET BUS I/F

IC11IC31

BU5V, AUDIO8V, LED10V AVR

X25

AVR AVR

IC31-34Q401,402

FIX-EQ

BUZZER

FM 8VAM 8V

BZ81

SW 5V

IC41

POWER AMP

Q813Q102Q104Q605Q602

IC83

IGN DET

Q808

IGN

AIR-CONDITIONER UART COMMUNICATION

Q815

BU DET

Q807

ACC DET

Q802,850,851

ILLM +/DET

Q816

P-ANT

BUS (COMMUNICATION)

BUS (AUDIO)

ACC

ILLM +/-

P-ANT

X89

LED ILLUMINATION FL DISPLAY

ANT

TUNER

AM : 215mV-rms

AUDIO KEY

GX-201KHF2/SHF2 GX-201RHF2/LHF2

IC12

AM/NC

0dB

-7.5dB

CD-MECHA

CD : 1.2V-rms

EXT-UNIT

CH : 1.2V-rms

NAVI

NAVI : 1.2V-rms

MATRIX I/F

PANEL u-COM

FL DISPLAY

LEVEL DIAGRAM

500mV-rms

LPF

MPX, LOUD, E-VOL, BASS, TRE, MID

270mV-rms

GX-201KHF2 GX-201SHF2

CD : +5dB

: +5dBCH

FM : +7dB

: +16dBAM

FAD, BAL

FRONT

REAR

GX-201RHF2 GX-201LHF2

: +5dB

: +10.5dB

: +18dB

IC23IC22

SELECTOR

LEVEL DIFFERENCE OF EACH SAUCE (CD 1W OUTPUT)

GX-201KHF2/SHF2 GX-201RHF2/LHF2

1kHz 30% mod.

1kHz 75kHz dev.

1kHz 0dB

Q401,

-1.5dB

402

MUTE

-23.8dB

-0.5dB

-16dB

IC31-34

FIX-EQ

+7.5dB

-3dB

Q24,

UARTHEAT CONTROL

1kHz 30% mod. 1kHz 40kHz dev.

-6dB 1kHz 0dB

0dB

1kHz 0dB

0dB

IC41

25ED2IC1ED1

AMP

+26dB

-14dB

-8dB 0dB 0dB

FRONT SP

REAR SP

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GX-201KHF2/LHF2/RHF2/SHF2

COMPONENTS DESCRIPTION

● SYNTHESIZER UNIT (X14-694x-xx)

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

IC11 FM diversity IC FM diversity switching (Only for GX-201JHF2/KHF2) IC12 AM noise canceller IC AM noise canceller IC13 2-piece ope-amp RDS noise amp (Only for GX-201LHF2/RHF2) IC14 RDS demodulation IC RDS demodulation (Only for GX-201LHF2/RHF2) IC22 Electronic volume BASS/MID/TRE, MPX, Mute, Electronic volume IC23 Ope-amp with switch Audio/NAVI switching IC31~34 4-piece ope-amp FIX-EQ IC35 2-piece ope-amp 1/2 VCC output IC41 Power amp 4ch power amp IC81 System µ-com System control IC82 Reset IC System reset detection IC83 I2C BUS IC F-BUS communication IC84 2-piece NOR circuit For hard muting IC85 EEPROM Bug counter-measure IC86,87 Inverter circuit F-BUS control Q101 Diversity switch When turned ON, turns diversity OFF (Only for GX-201JHF2/KHF2) Q102,103 FM power supply switch When FM, 8V output Q104,105 AM power supply switch When AM, 8V output Q106 IF count detection When detecting IF count, Lo output Q107 RDS data buffer RDS data buffer output (Only for GX-201LHF2/RHF2) Q108 S-meter buffer S-meter voltage output Q151,152 Noise amp Noise detection constant switching (Only for GX-201LHF2/RHF2) Q153 Noise amp Noise detection output buffer (Only for GX-201LHF2/RHF2) Q202 Mute switch For muting with in electronic volume Q401,402 NAVI mute For NAVI muting at interruption Q403 SVR switch For SVR discharging Q404 SVR switch For SVR discharging at over voltage Q601,602 Audio DC/DC power supply switch For DC/DC audio Q604,605 Heater DC/DC power supply switch For DC/DC heater Q606,607 DC/DC control switch For switching internal frequency Q650 Audio DC/DC power supply switch For DC/DC audio Q651 Heater DC/DC power supply switch For DC/DC heater Q801 Buzzer switch For buzzer Q802 Illumination + detection For illumination + detection Q803 Reset output switch for F-BUS When resetting F-BUS, Hi output Q804 NAVI mute switch When muting NAVI, Hi output Q805 IF count detection When detecting IF count, Lo output Q806 P-ANT circuit control switch When tuner, GND electric potential output Q807 ACC detection When ACC ON detection, Lo output Q808 IGN detection When IGN ON detection, Lo output Q809 SYS_ON current buffer When SYS_ON Hi, Lo output Q810 Hard reset switch When HARD_RESET ON, Lo output Q812 BUS_OFF switch When F-BUS system OFF, Hi output

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GX-201KHF2/LHF2/RHF2/SHF2

COMPONENTS DESCRIPTION

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

Q813 P-ON5V power supply switch For P-ON5V Q815 BU detection When BU ON, Lo output Q816 P-ANT circuit control switch When tuner, BU electric potential output Q817,818 P-ANT circuit protection P-ANT short circuit protection Q820 F-BUS mute output When mute ON, Hi output Q821 BUS_ON detection When F-BUS system ON, Hi input Q822 BUS_ON switch When F-BUS system ON, Hi output Q850,852 Illumination - detection switch When detecting illumination -, Hi output Q853 Illumination - detection switch When detecting illumination -, Lo output

● SWITCH UNIT (X25-929x-xx)

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

IC1 Display control µ-com VFD control, Key intake IC3 EEPROM For bug counter-measures Q1 Audio VFD5V switch When audio VFD ON, 5V output Q2 Audio VFD5V switch When audio DC/DC ON, Lo output Q4 Heater VFD5V switch When heater VFD ON, 5V output Q5 Heater VFD5V switch When heater DC/DC ON, Lo output Q11 F differential indicator power supply switch When F-differential indicator ON, 5V output Q12 R differential indicator power supply switch When R-differential indicator ON, 5V output Q21 Multiple-push reset circuit detection When detecting REP/RDM, DWN_SEEK, Hi output Q22 Multiple-push reset circuit detection When resetting by multiple push, Lo output Q23 Multiple-push reset circuit detection When TONE (BAL/FAD) detected, Lo output Q24 Heater UART communication control Heater UART communication control (TX) Q25 Heater UART communication control Heater UART communication control (RX) Q26 SW5V power supply switch When IGN ON, 5V output Q27 Panel illumination switch When panel illumination ON, 10V output Q28 Panel illumination switch When panel illumination ON, GND electrical potential Q29 F differential indicator dimmer control When dimmer OFF, GND electrical potential Q30 R differential indicator dimmer control When dimmer OFF, GND electrical potential Q33 System reset detection When system is reset, Hi output Q34 Dimmer current counter-measure When audio encoder ON, 5V output Q35 System reset detection When system is reset, Lo output Q36,37 6CD breakup counter-measure FL (H) discharge circuit

● DAUGHTER UNIT (X89-2540-01)

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

IC11 Various constant voltage power supply output 5V, 8V, 10V constant voltage power supply IC31 CD servo 8V power supply For CD servo Q101 Panel illumination power supply switch When illumination + input, 5V output Q301~303 CD servo power supply switch For CD servo

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GX-201KHF2/LHF2/RHF2/SHF2

MICROCOMPUTER’S TERMINAL DESCRIPTION

● SYSTEM MICROCONTROLLER IC : 703037AYGFM02 (X14 : IC81)

Pin No. Pin Name I/O Application Processing Operation Description

1 SC_DATAIN O Slave data output (Panel communication) (UART) 19200bps 2PLL_SDA I/O F/E (+EEPROM) data input/output (I2C) 100kHz or less 3 MECHA_SDA I/O CD mechanism data input/output (I2C) 100kHz or less 4 PLL_SCL O F/E (+EEPROM) clock output (I2C) 100kHz or less 5 MECHA_SCL O CD mechanism clock output (I2C) 100kHz or less 6 R_DATA (NC) I (O) RDS data input (J, M, General type : Open, not used) 7 R_QUAL (NC) I (O) RDS quality (J, M, General type : Open, not used) 8NCONot used Open

9 EVDD - 5V electrical potential 10 EVSS - GND electrical potential 11 BEEP O BEEP output Buzzer : H (Pulse) 2kHz 12 IFC I F/E IFC OUT input Station found : L, Other : H 13 AM+B O AM power supply output AM : H, Other : L

14 FM+B O FM power supply output

15 ILL_DET- I ILL- detection (V ehicle illumination control signal) ILL- ON (GND) : H (Pulse input) 16 ILL_DET+ I ILL+ detection (Vehicle small signal) ILL+ ON : L

17~20 NC O Not used Open

21 IC/VPP - Write voltage

22~25 NC O Not used Open

26 BUS_DI I IE-BUS data input 27 BUS_DO O IE-BUS data output 28 IC2_SDA I/O IC2 data input/output (I2C) 100kHz or less 29 IC2_SCL O IC2 clock output (I2C) 100kHz or less

30,31 NC O Not used Open

32 MUTE O Audio mute Mute : H, Normal : L

33 AFS (NC) O Switching constant at noise detection

34 RESET I System rest input Reset : L, Reset voltage : 4.2V, Reset at rise of L→H 35 XT1 I Sub-system clock oscillation terminal 36 XT2 - Sub-system clock oscillation terminal 37 REGC 38 X2 - Main system clock oscillation terminal 12.58MHz 39 X1 I Main system clock oscillation terminal 12.58MHz 40 VSS - GND electric potential 41 VDD - 5V electric potential 42 NC O Not used Open 43 HARD_RESET O Hard reset output Reset : H

RDS operation : H (FM : H), Other than RDS operation : L (Other : L)

FM, AM seek : L (J, M, General type : Open, not used ), RDS operation : H, Other than RDS operation : L

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GX-201KHF2/LHF2/RHF2/SHF2

MICROCOMPUTER’S TERMINAL DESCRIPTION

Pin No. Pin Name I/O Application Processing Operation Description

44 NAVI_SW O NAVI voice switching NAVI interruption : H, Normal : L 45 NAVI_MUTE O

46 DC/DC_FREQ O DC/DC oscillation frequency control AM 5kHz step 750~900, 1110~1270, 1480~1630 : Hi,

47 NC (DIVER) O Diversity antenna control J, M type : Normal mode : L (DIVER ON),

48 P_STBY O Power IC standby control ACC ON, POWER ON : H, Other : L

49 P_MUTE O Power IC mute control This mute should not be normally used when playing

50 SVR O SVR control Normal : L, Discharge : H 51 ANT_CON O Power antenna control 52 NC O Not used Open 53 IGN_DET I IGN detection 54 ON_REQ I F-BUS ON request System ON request : L 55 SYS_ON O F-BUS ON output System ON : H 56 NC O Not used Open 57 SYS_OFF O F-BUS OFF output System OFF : H 58 BVDD - 5V electric potential 59 BVSS - GND electric potential 60 BUS_STBY O BUS IC standby control System ON : H 61 PON O Power ON control

62 DC/DC_H O DC/DC (For HTR-VFD) control

63 DC/DC_A O DC/DC (For AUDIO-VFD)control

CD_LOE/LIM_SW

65 CD_MOTOR O CD loading motor (+) control

66 CD_LO/EJ I/O CD loading/eject control Normal : Hi-Z (Refer to 65pin), Eject : H, Loading : L 67 CD_MSTOP O CD standby control Stop : L (Mechanism standby), Normal : H 68 CD_MRST O CD reset Reset : L, Reset at rise of L→H 69 CD_MUTE I CD audio mute request Mute : L, Activated only when CD_MSTOP : H 70 CD_8EJE_SW I CD 8cm disk eject end SW

71 CD_LOS_SW I CD loading start SW

CD_12EJE_SW

NAVI voice Frontch interruption mute (When switching)

I CD down limit SW input Disk chucking : H, Chattering time 30ms (+20%)

I CD 12cm disk eject SW

NAVI interruption start/release : L, Normal : H AM 9kHz step 747~900, 1125~1287, 1494~1629 : Hi,

Other : L E, General type : Open, not used

Test mode : H (OFF) or L (ON) switching (Initial : H)

Mute : L, Other : H

is broken off such as search during play.

Power ON : L, Power OFF : H, Stabilization time 400ms HTR ON : H, HTR OFF : L, Stabilization time : 550ms, Turn to H after receiving panel µ-com HVFD_ON : H AUDIO ON : H, AUDIO OFF : L, Stabilization time 500ms, Turn to H after receiving panel µ-com AVFD_ON : H

LO/EJ mode : H, Other : L, In other mode, CD mechanism LO/EJ pin is switched to pull-down.

Eject complete : H edge, Chattering time 30ms (+20%) Loading start : H edge, 8/12cm disk is found : L, Not found : H, Chattering time 30ms (+20%) Eject complete : H edge, Chattering time 30ms (+20%)

Page 7

GX-201KHF2/LHF2/RHF2/SHF2

MICROCOMPUTER’S TERMINAL DESCRIPTION

Pin No. Pin Name I/O Application Processing Operation Description

73 REF_CON O A/D port reference voltage output ACC ON : H, Other : L 74 AVDD - 5V electric potential 75 AVSS - GND electric potential 76 AVREF I A/D port reference voltage input

77~80 NC I Not used

81 DIAG I Test mode terminal Test mode : L, Normal : H 82 TYPE1 I Destination setting 1 83 TYPE2 I Destination setting 2 84 TYPE3 I Destination setting 3 85 NOISE I FM noise detection (AD input) 86 SMETER I S-meter (AD input) 87 NC I Not used 88 SCRTY I Force security release Released : L, Other : H 89 SC_CON O Slave ON/OFF control (Panel communication) ON : H, OFF : L 90 MC_REQ I Master ON request (Panel communication) ON request : H 91 ACC_DET I ACC detection ACC ON : L, ACC OFF : H, Detection voltage : 8.5V 92 OFF_REQ I F-BUS OFF request System OFF request : L

93 BU_DET I BU detection

94 SC_RST O Slave reset (Panel communication)

95 SC_BKUP O 96 R_CLK (NC) I (O) RDS clock J, M, General type : Open, not used 97 FLASH_SI O Not used Open (For flash writing) 98 FLASH_SO O Not used Open (For flash writing) 99 FLASH_CLK O Not used Open (For flash writing)

100 MC_DATAIN I Slave data input (Panel communication) (UART) 19200bps

Reduced electricity detection (Panel communication)

NOISE value : With 2.9V or less, station found permission SMETER value : According to the data written to EEPROM

BU ON : L, BU OFF (At instant reduction) : H, Detection voltage : 8.5V Normal : H, Reset : L (2 pulses), Immediately after reset, communication error : Reset Electricity reduced product : L, Normal : H

Page 8

GX-201KHF2/LHF2/RHF2/SHF2

MICROCOMPUTER’S TERMINAL DESCRIPTION

● PANEL MICROCONTROLLER : 90587CAPFV13x (X25 : IC1)

Pin No. Pin Name I/O Application Processing Operation Description

1 KR2_A I Key matrix (RET : 2Bit) 2 KR3_A I Key matrix (RET : 3Bit) 3 KR4_A I Key matrix (RET : 4Bit) 4 KR5_H I Key matrix (RET : 5Bit) 5 KR6_H I Key matrix (RET : 6Bit) 6,7 NC O Not used, Open

Controls power supply for Audio FL tube.

8AVFD_ON O Audio VFD power supply ON signal When stopped (L) : Power supply OFF,

Normal operation (H) : Power supply ON 9 VSS - Within-chip ground GND 10~15 NC O Not used, Open 16 HMC_DATA I Heater ECU communication (Reception) Conducts communication (Reception) with A/C 17 HSC_DATA O Heater ECU communication (Transmission) Conducts communication with A/C (transmission) 18,19 NC O Not used, Open 20 AVFD_DATA O 21 VCC - Power supply input terminal BU5V connection 22 AVFD_CLK O VFD tube communication for audio (Clock) 23 SCL O Serial clock for E2PROM Output to E2PROM as I2C clock signal 24 SDA I/O Serial data for E2PRROM Input/Output to E2PROM as I2C data signal 25 C - Terminal for voltage stabilization 0.1µF capacitor connection 26 TYPE1 I Left/Right steering wheel judgment H : Left steering wheel, L : Right steering wheel 27 TYPE2 I Judgment on security condition H : Security, L : No security 28 DVRH - Connected to GND as D/A converter not used GND 29 DVSS - Ground the terminal for D/A converter GND 30,31 NC O Not used, Open 32 AVCC - Power supply input terminal A/D converter VCC 33 AVRH - Connected to GND as A/D converter not used GND 34 AVRL - Connected to GND as A/D converter not used GND 35 AVSS - Ground the terminal for A/D converter GND 36 NC O Not used, Open 37 HVFD_DATA O

38 HVFD_CLK O Heater VFD tube communication (Clock)

39 NC O Not used, Open 40 VSS - GND connection terminal GND 41 ACC_DET I Detection of ACC Hi : No ACC, Lo : With ACC

42 SW5V_ON O UART buffer power supply control

VFD tube communication for audio (Transmission)

Heater VFD tube communication (Transmission)

Display data transmission for audio FL tube

Audio VFD synchronization clock output during serial communication

Display data transmission to A/C FL tube

Heater VFD tube communication synchronization clock

output for serial communication

When IGN ON L : ON (SW5V) output,

When IGN OFF H : OFF (SW5V) output

Page 9

GX-201KHF2/LHF2/RHF2/SHF2

MICROCOMPUTER’S TERMINAL DESCRIPTION

Pin No. Pin Name I/O Application Processing Operation Description

43,44 NC O Not used, Open

45 IGN_DET I External interruption 0 (IGN signal)

46 SC_BKUP I

47 MD0 I Used when writing to flash ROM Hi : Normal mode, Lo : FLASH writing mode 48 MD1 I Used when writing to flash ROM Hi : Normal and FLASH writing mode, Lo : No setting 49 MD2 I Used when writing to flash ROM Hi : FLASH writing mode, Lo : Normal mode 50 HST I L : Hardware standby condition VCC 51,52 NC O Not used, Open

53 SC_CON I External interruption 4 (Audio SC-CON signal) start/stop is made as external interruption from audio.

54 KR0_A I External interruption 5 (Interruption key RET0)

55 KR1_A I External interruption 6 (Interruption key RET1)

56 NC O Not used, Open 57 SC_DATA IN I

58 MC_DATA IN O Audio system µ-com communication

59 MC_REQ O Audio MC_REQ signal

60 AVFD_LAT O Audio VFD tube LAT signal Audio FL tube display data LAT signal 61 NC O Not used, Open 62 HVFD_CS O Heater VFD tube chip select signal 63 NC O Not used Pull down (When built-in ROM is flash memory) 64 NC I Not used Pull down (When built-in ROM is flash memory)

65 HVFD_ON O Heater VFD power supply ON signal

66,67 NC O Not used, Open

68 AVFD_BLK O Audio VFD tube brightness adjust Brightness info is variable by the Audio system µ-com with the

69~74 NC O Not used, Open 75 SC_RST I CPU reset signal 76 NC O Not used, Open

External interruption 1 Breakup condition output from Audio. (Power supply breakup signal) Hi : Breakup recovery, Lo : Breakup occurrence

Audio system µ-com communication (Reception)

(Transmission) Trans mission data is k ey data and CAN data.

Detect IGN signal. Lo : Communication permitted, Hi : Communication prohibited

As audio communication permission signal, judgment on

Hi : Occurrence of interruption, Lo : Port sampling Audio key stop mode return. In stop mode, Lo : Occurrence of interruption, Other : Prohibition Audio key stop mode return. In stop mode, Lo : Occurrence of interruption, Other : Prohibition

Communication interface with Audio system µ-com (Reception). Reception data is display data. Communication interface with Audio system µ-com (Transmission).

Beginning communication with Audio Output stopped after recognizing SC-CON signal.

When chip select (Lo) is output, signal transmission data is effective

Stopped (L) : Power supply OFF, Normal operation (H) : Power supply ON

Audio FL tube brightness is adjusted with Hi/Lo duty ratio.

illumination brightness data. Duty ratios are of 16 types

system µ-com

Page 10

GX-201KHF2/LHF2/RHF2/SHF2

MICROCOMPUTER’S TERMINAL DESCRIPTION

Pin No. Pin Name I/O Application Processing Operation Description

77 X1A 78 X0A O 79 VSS - GND connection terminal GND 80 X0 - CPU main clock supply 3.9936MHz crystal is used. 81 X1 - CPU main clock supply 3.9936MHz crystal is used. 82 VCC - Power supply Input terminal Connected to BU5V 83 NC O FLASH write method setting Not used during normal operation, Lo : Serial write permission 84 NC I FLASH write method setting Not used during normal operation, Hi : Serial write permission 85 F_DEF_DIM O LED control of front DEF key H : Bright light, L : Dim light 86 F_DEF_IND O LED control of front DEF key Lo : ON, Hi : OFF 87 R_DEF_DIM O LED control of rear DEF key H : Bright light, L : Dim light 88 R_DEF_IND O LED control of rear DEF key Lo : ON, Hi : OFF 89 HENC_UP I Rotary encoder SW (A/C : A) 90 HENC_DW I Rotary encoder SW (A/C : B) 91 AENC_UP I Rotary encoder SW (Audio : A) 92 AENC_DW I Rotary encoder SW (Audio : B) 93 KS0_AH O Key matrix (SCAN : 0Bit) 94 KS1_AH O Key matrix (SCAN : 1Bit) 95 KS2_AH O Key matrix (SCAN : 2Bit) 96 KS3_AH O Key matrix (SCAN : 3Bit) 97 KS4_AH O Key matrix (SCAN : 4Bit) 98 TONE I TONE (BAL/PAD) key input Lo : OFF, Hi : ON 99 A_STORE I A_STORE key input Lo : ON, Hi : OFF 100

DOWN_SEEK

Sub clock terminals for accommodating 2 clocks Sub clock terminals for accommodating 2 clocks

IDOWN_SEEK key input Lo : OFF, Hi : ON

Not used, Connected to GND

Page 11

GX-201KHF2/LHF2/RHF2/SHF2

SECURITY CODE (GX-201RHF2)

The audio security system has been set for GX-201REF2

and GX-201RHF2.

● Security Function

Security is released when an agreement is found between the data from the immobilizer, which is sent from the vehicle, and the data that are set beforehand.

The interrelationship in the security system is shown in the chart below.

BU ON

Non-registrationRegistration

Non-registration mode

Registration mode

Confirmation mode

Normal operation

Code confirmation mode

Security mode

Delete mode

Re-Registration

● Code Confirmation Mode

This mode is for judging whether the Security code is registered or not in the audio unit.

When the unit is reset, the operation will start from the Current mode.

• The registration condition of the Security code can be

grasped using the E2PROM.

• The Security code is not registered or when abnormalities

detected with E2PROM, the system will move to Non-registration mode.

• When registering a Security code, the system will move to

Confirmation mode.

● Non-Registration Mode

Thus system will move to the Non-registration mode, when the Security code is not registered for an audio unit.

Even if the Security code is not resisted, operation is possible for an hour. Howe v er , there is a certain limitations placed on the operation. Using this time, production and a variation on the products will be conducted.

● Confirmation Mode

The system will automatically go into the Confirmation mode, when the Security code is confirmed to be adjusted to in the Code confirmation mode.

When the A/C ECU is obtained Through CAN from the Integrated ECU on the vehicle side, it goes into the gateway. The Immobi code sent to the audio unit by UART and the Security code registered on the audio unit is compared.

As a result of confirmation, if the code is judged to be authentic, the system goes into normal operation. However, if the code is not judged to be authentic, then the system goes into the Security mode.

● Security Mode

The system goes into the Security mode when the Immobi code is not judged to be authentic when it is compared with the Security code registered in the audio unit. When this happens, the unit can be operated for an hour. After the elapse of an hour, the po wer on the unit is cut off and operation is f orcefully stopped.

Also, in the Non-registration mode, if an hour elapses, the system will go into the Security mode. In the Security mode, the power on the unit is cut off and operation is forcefully stopped. Note : When working on a unit to repair it, the repair would should be conducted in the one hour effective time. After the elapse of an hour, the power on the unit is cut off. If the power is put on again, another hour will be given to operate on.

• Conditions of the audio unit during the Security mode

Power off. Display light off. Keys do not work (Except the EJECT Key). Audio power off (No voice output). Switching on TV sources not possible . ( Key operation from the monitor not possible.) Voice interruption/switching from NAVI and hands-free unit not possible. In the Security mode, the display is not lighted and when there is an input from any of the key, “SECURITY” will be displayed.

● Delete Mode

The system goes in the Delete mode, when the “Requesting Delete” condition of the Integrated ECU operating condition signal from the Integrated ECU is obtained by the A/C ECU via low-speed CAN into the gateway and it is sent to the audio unit via UART.

The Delete mode is positioned as a Test mode and detailed input methods are not disclosed.

The Security code recorded into the E2PROM in the Registration mode and Re-registration mode is cleared in the Delete mode and non-registration condition is obtained. Note : When a linked product is repaired, the security code must be deleted when the repair work is completed.

For GX-201, in order to maintain the security, deletion is only effective when selection monitor is used.