Kenwood KD-CU-4549-SD, KD-CBT-648-U, KD-CBT-41-U, KDC-4751-SD, KD-CU-549-BT Service Manual

...

CD RECEIVER

KDC-348U/4751SD KDC-BT41U/BT648U KDC-U4549/U4549SD/U549BT KDC-X395/X695

SERVICE MANUAL

Tuner setting adjustment after replacing E2PROM

After replacing E2PROM (IC203 on X34), tuner setting adjustment is needed. The adjustment is that to perform the “TUNER Setting Adjustment Mode” (Page 13).

B53-0844-00 (N) 303

KDC-4751SD : Panel assy (A64-5245-02)

KDC-BT648U : Panel assy (A64-5240-02)

KDC-U549BT : Panel assy (A64-5244-12)

KDC-X695 : Panel assy (A64-5241-12)

KDC-BT41U : Panel assy (A64-5242-12)

KDC-U4549SD : Panel assy (A64-5246-12)

TDF SPARE-PANEL

MAIN UNIT NAME TDF PARTS No. TDF NAME KDC-348U Y33-3490-11 TDF-113D KDC-4751SD Y33-3482-73 TDF-4751SD KDC-BT41U KDC-BT648U KDC-U4549 Y33-3490-21 TDF-U4549 KDC-U4549SD Y33-3480-22 TDF-U4549SD KDC-U549BT Y33-3480-21 TDF-U549BT KDC-X395 Y33-3490-10 TDF-113DX KDC-X695 Y33-3480-11 TDF-116DX

Y33-3482-71 TDF-BT41U Y33-3480-10 TDF-BT116D

Mounting hardware assy (J22-2049-03)

* Tap screw (2x8) (N80-2008-48)

* Depends on the model. Refer to the parts list.

* Screw set (N99-1757-15)

* DC cord (E30-6933-05)

Lever (D10-7139-04) x2

* DC cord (E30-6934-05)

* Plastic cabinet assy (A02-2757-13)

* Carrying case (W01-xxxx-xx)

This product uses Lead Free solder.

This product complies with the

* Remote controller assy (RC-405) (A70-2104-05)

* Trim plate (xxx-xxxx-xx)

* Microphone (3m) (W01-1768-15)

PbF

RoHS directive for the European market.

KDC-348U/4751SD/BT41U/BT648U

/U4549/U4549SD/U549BT/X395/X695

ELECTRIC UNIT (X34- )

W551

ATOMIC TUNER

(4MHz)

TYPE 1,2

∗

J921

IC501

BU5V

MIC CN

DME1

IC301

LEVEL SHIFT

IC201

IC202

RESET

S301

RESET SW

J701

PRE-OUT

FRONT/REAR/NF

Q701-706

PRE MUTE

A8V

SERVO+B

BU5V

CD MECHA

USB CN

ROTARY ENCODER

IC2

REMOTE

KEY MATRIX

BU3.3V

J301

2219 8 6

(2.8V)

∗

J601

LX-BUS

BU3.3V

4VPRE+B

IC401

BU5V

∗

MAIN CLOCK = 48MHz (CRYSTAL 12MHz)

BU3.3V

IC601,

602

LEVEL SHIFT

SYSTEM u-COM

SUB CLOCK = 32.768kHz (QUARTZ)

211

USB5V

OEM RC

ED1

A8V

E-VOL

IC203

PANEL3.3V

SW3.3V

FL+B

CONNECTOR

E2P ROM

IC801

SW3.3V

ILLUMI+B

POWER IC

IC802

LEVEL SHIFT

to GND

CN DET

KEY ILLUMI

Q707,708

MUTE

∗

IC451

SPE-ANA

AGC AMP

SW3.3V

∗

IC261

iPod AUTHENTICATION

SWREG5V

1333

∗

CN901

SD SLOTSD3.3V

AUX CN

BU5V

BU DET

∗

A901

BT MODULE

∗

IC921

ANALOG SW

∗

CN1

MIC CN

SWREG5V

IC901

BT3.3V

SWREG5V

DC-CN

FRONT L/R

POWER SUPPLY IC

REAR L/R

P-CON P-ANT OEM RC MUTE ILLUMI ACC BU

BLOCK DIAGRAM

Q301

BU-DET

ACC-DET

ILLUMI-DET

LINE-MUTE

AM+BLPF

∗

OME-RC PS1-1 PS1-2 PS1-3 PS2-1 ACC-DET BU-DET ILL-DET LINE MUTE PON-4VPRE PON-SW3 PON-PAN3 PON-SWERG FSEL SW-VBUS VBUS-OC

∗

SD-PWR

BU DET

Q102

SURGE DET

Q101

ACC DET

∗

Q105

ILLUMI DET

D105

LINE MUTE

4VPRE+B

SERVO+B

BU3.3V

SW3.3V

PANEL3.3V

FL+B

SWREG5V

BT3.3V

SW3.3V

USB5V

VBUS OC SW VBUS

SD3.3V BU3.3V

PS1-1 PS1-2 PS1-3 PS2-1

∗

Q91,92

4VPRE+B

Q1,2

SERVO+B

Q103

BU3.3V

∗

Q302

SW3.3V

Q301

PANEL3.3V

∗

IC902

BT3.3V

IC71

HI-SIDE SW

∗

Q951

SD3.3V

ACC

ILLUMI

MUTE

Q5-10

LEVEL SHIFT

SD PWR

ILLUMI+B

P-CON

P-ANT

OEM RC

MUTE

ILLUMI

ACC

P-CON

P-ANT

A8V

AM+B

BU5V

SW5V

PON-4VPRE

Q3,4

SW14V

BU5V

BU3.3V

PON-SW3

BU3.3V or SW3.3V

PON-PAN3

Q51

DC/DC5V

IC1

SWREG5V

PON-SWREG FSEL

SWITCH UNIT (X16- )

BLOCK DIAGRAM

KDC-348U/4751SD/BT41U/BT648U /U4549/U4549SD/U549BT/X395/X695

DPU1

ACB

FO COIL

TR COIL

DM1

SPINDLE MOTOR

DM2

LOADING & SLED MOTOR

CD PLAYER UNIT (X32-6250-02)

IC4

SIGNAL A/B/C/E/F

APC

IC3

FO OUT

TR OUT

MOTOR DRIVER

DM OUT

FM OUT

VREF

FO OUT

TR OUT

DM OUT

FM OUT

CLOCK

16.934MHz

RF AMP

SERVO PROCESSOR

MP3 DECODER

WMA DECODER

AAC DECODER

1M bit SRAM

MOTHER BOARD

SRAM STB

BUCK

D GND

D1.5V

CCE

PIO0

MRST MRST

ZDET MUTE L/R

A3.3V

AGND

BU1.5V

D3.3V

Q14

D1.5V OUTPUT

R15

LEVEL SHIFT RESISTOR

C43

Lch Lch

Rch

FILTER

C44

FILTER

IC5

BU1.5V/ D3.3V REG

(X34- )

SRAM STB

BUCK

CCE

PIO0

Rch

A.GND

BU5V P.ON

D.GND

LOS-SW

12EJE-SW

LOE-SW

DRV MUTE

LO/EJ

MOTOR

S7.5V

S.GND

KDC-348U/4751SD/BT41U/BT648U /U4549/U4549SD/U549BT/X395/X695

COMPONENTS DESCRIPTION

ELECTRIC UNIT (X34-696x-xx)

●

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

IC1 Power Supply IC Outputs 5Vx2, 8V, 8.3V, 10.3V, P-CON, P-ANT.

IC21 3.3V AVR IC Power supply for BU+3.3V to μ-COM.

IC51 SW REG Power supply for D+5.1V to USB and panel.

IC71 Hi-side SW USB over-current detection.

IC201 System μ-COM Controls FM/AM tuner, CD mechanism, panel, volume.

IC202 Reset IC Lo when detection voltage goes below 2.8V.

IC203 E2PROM For log memory.

IC261 iPod Authentication IC For Apple authentication.

IC301 3.3V to 5V Level shift.

IC401 E-VOL Controls the source and volume.

IC501 ATomIC RDS Tuner IC.

IC601,602 3.3V to 5V Level shift.

IC801 Power IC Ampliﬁ es the front L/R and the rear L/R to 50W maximum.

IC802 3.3V to 5V Level shift.

IC901 BT LPF Bluetooth output low pass ﬁ lter.

IC902 3.3V AVR Power supply for BT/SD+3.3V.

IC921 Switch IC MIC switching signal (Panel microphone/ Rear microphone)

Q1,2 SERVO+B AVR When Q2’s base goes Hi, AVR outputs 7.5V.

Q3,4 Control SW for SERVO+B ON when Q3’s base goes Hi.

Q5,6 Control SW for IC1 ON when Q5’s base goes Hi.

Q7,8 Control SW for IC1 ON when Q7’s base goes Hi.

Q9,10 Control SW for IC1 ON when Q9’s base goes Hi.

Q51 FREQ CONT SW for IC51 1.1MHz when the base goes Lo, 1.7MHz when the base goes Hi.

Q91,92 4V PREOUT+B AVR When Q92’s base goes Hi, AVR outputs 12V.

Q93,94 CONT SW for 4V PREOUT+B ON when Q94’s base goes Hi.

Q101 ACC DET ON when the base goes Hi during ACC is applied.

Q102 Surge DET When the base goes Hi, surge voltage is detected.

Q103 BU DET ON when the base goes Hi during BU is applied.

Q104 Mute CONT ON when the base goes Hi.

Q301 PAN3.3V SW ON when the base goes Lo.

Q302 SW3.3V SW ON when the base goes Lo.

Q701,702 Pre-out Mute SW When one of 2 bases goes Hi, pre-out is muted.

Q703,704 Pre-out Mute SW When one of 2 bases goes Hi, pre-out is muted.

Q705,706 Pre-out Mute SW When one of 2 bases goes Hi, pre-out is muted.

Q707,708 Mute Driver for Pre-out ON when the base goes Lo.

Q921 MIC SW CONT Rear MIC when the base goes Lo, panel MIC when the base goes Hi.

Q951 SD3.3V SW ON when the base goes Lo.

KDC-348U/4751SD/BT41U/BT648U /U4549/U4549SD/U549BT/X395/X695

COMPONENTS DESCRIPTION

CD PLAYER UNIT (X32-6250-02)

●

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

IC3 4ch BTL Driver

IC4 Servo DSP with built-in Audio DAC With built-in MP3/WMA/ACC decoder and 1M-bit-SRAM.

IC5 BU1.5V/D3.3V REG.

Q1 APC (Auto Power Control) Drives LD (Laser Diode).

Q14 D1.5V Output

D2 Laser Diode Protection

D3,4 Static Electricity Countermeasure Prevents malfunction by static electricity.

Driver for focusing & tracking coil, driver for sled & spindle motor, and operation

for disc loading & ejection.

Power supply for BU1.5V.

Power supply for digital/analogue/audio 3.3V.

Switches ON/OFF at one end of BU1.5V line which is separated into 2 directions.

Uses output voltage as D1.5V.

Prevents reverse bias which is applied to laser.

Laser destruction prevention.

KDC-348U/4751SD/BT41U/BT648U /U4549/U4549SD/U549BT/X395/X695

MICROCOMPUTER’S TERMINAL DESCRIPTION

System μ-COM : IC201 (X34- : ELECTRIC UNIT)

●

Pin No. Pin Name I/O Application

1,2 NC - Not used

3 AVSS - Reference GND for A/D converter

4 VREFH - Reference power supply for A/D converter

5 RESET

6 MODE I Mode Connects to GND

7 IPOD SDA I/O

8 IPOD SCL O I2C clock output for iPod authentication IC

9 IPOD RST

10 ROTARY CW I VOL encoder input Pulse width detection

11 VFD DATA I/O VFD data input/output VFD data input/output

12 VFD PAN DATA I VFD data input VFD data input

13 VFD CLK O VFD clock output 125kHz

14 ROTARY CCW I VOL encoder input Pulse width detection

15 DVSS - GND

16 VFD RST

17 VFD CE O VFD control request

18 PON SW3

19 BSIF LRCK O BS LRCK output

20 BSIF BCK O BS BCK output

21 BSIF DATA O BS DATA output

22 BSIF GATE O Data transfer starting signal

23 BSIF ST REQ I Data input request signal

24 MIC SW O BT microphone switching (KDC-BT648U) L: Panel microphone, H: Rear microphone

25 PON PANEL3

26 NC - Not used Output L ﬁ xed

27 PANEL DET I Panel connection detection H: No panel, L: Panel attached

28 NC - Not used Output L ﬁ xed

29 CD BREAK O CD motor brake

30 CD LOEJ O CD motor control

31 CD PON I/O CD mechanism power supply control output H: Power supply ON, Hi-Z: Power supply OFF

32 CD LOE LIM SW I CD detection (Chucking SW) H: Loading completed, L: No disc

33 CD SRAM STBY

34 CD REQ I Communication request from mechanism DSP H: Data request

35 CD LOS SW I CD loading detection

36 CD SO O Serial interface transmission

37 CD SI I Serial interface reception

38 CD CLK O Serial interface clock output 1MHz

39 BEEP O Beep output 2kHz/1kHz

40 CD DISC12 SW I 12cm disc detection

I Reset input

I2C data input/output for iPod authentication IC

O Reset signal for iPod authentication IC

O VFD driver reset output

I/O SW3.3V control ON: L, OFF: Hi-Z

I/O PAN3.3V control

O Decoder SRAM standby control L: SRAM standby

Truth Value

Table

Processing / Operation / Description

Connects to GND even when A/D converter is

not used

Connects to +B even when A/D converter is not

used

H: Reset cancelled, L: Reset

Momentary power down or panel detached or

11 minutes after ACC OFF: L

ON: L, Momentary power down or panel de-

tached or 11 minutes after ACC OFF: Hi-Z

Refer to the truth value table

KDC-348U/4751SD/BT41U/BT648U /U4549/U4549SD/U549BT/X395/X695

MICROCOMPUTER’S TERMINAL DESCRIPTION

Truth Value

Pin No. Pin Name I/O Application

41 ZDET IN I 0-bit mute request H: Mute request, L: Normal play

42 CD RST

43 CD CCE

44 CD DRIVE MUTE

45 CD MOTOR O CD motor switching control

46 NC - Not used Output L ﬁ xed

47 DVCC3 - Power supply

48 DVSS - GND

49,50 NC - Not used Output L ﬁ xed

51 SD CD

52 SD PWR

53 BT RST

53 SD CS

54~56 NC - Not used Output L ﬁ xed

57 PS1-1 O Power supply IC control

58 PS1-2 O Power supply IC control

59 PS1-3 O Power supply IC control

60 PS2-1 O Power supply IC control

61 NC - Not used Output L ﬁ xed

62 FSEL1 O SW-REG frequency switching

63 NC - SW-REG frequency switching Output L ﬁ xed

64 PON SW-REG O SW-REG ON/OFF L: OFF, H: ON

65 BT SYS DATA O Data output to BT

65 SD DO O Data output to SD

66 BT BT DATA I Data input from BT

66 SD DI I Data input from SD

67 SD CLK O Clock output to SD

68~70 NC - Not used Output L ﬁ xed

71 ILLUMI DET

72 BU DET

73 ACC DET

74 NC - Not used Output L ﬁ xed

75 PON 4V-PRE I/O 4V-PRE power supply control (eXcelon model) H: ON, Hi-Z: OFF

76 SA RST

77 SA CLK O Clock output for spectrum analyzer

78 MUTE 0

79 MUTE 1

80 MUTE 2

O CD mechanism reset H: Normal, L: Reset

O CD mechanism chip enable

O CD motor driver mute output

I SD card insert detection L: SD found

I/O SD block power supply control L: POWER ON, Hi-Z: POWER OFF

O BT module reset L: BT reset, H: Normal

O CS output to SD

I Dimmer illumination detection L: ON, H: OFF

I Momentary power-down detection

I ACC detection ACC found: L, No ACC: H

O Reset output for spectrum analyzer H: Reset cancelled, L: Reset

O Front direct mute

O Rear direct mute

O Other direct mute

Table

Processing / Operation / Description

Refer to the truth value table

BU found: L,

No BU or momentary power down: H (Operates

less than 4ms after momentary power down)

L: Mute ON (Time constant solo setting: 10ms),

H: Normal

L: Mute ON (Time constant solo setting: 10ms),

H: Normal

L: Mute ON (Time constant solo setting: 10ms),

H: Normal (Countermeasure against IC2 shock

noise)

KDC-348U/4751SD/BT41U/BT648U /U4549/U4549SD/U549BT/X395/X695

MICROCOMPUTER’S TERMINAL DESCRIPTION

Pin No. Pin Name I/O Application

81 MUTE AFS

82 PWIC MUTE

83 PWIC STBY

84 PWIC DC ERR I

85 LX DATA M O Data to slave unit SIO mode transmission

86 LX DATA S I Data from slave unit SIO mode reception

87 LX CLK I/O LX-BUS clock SIO mode clock (125kHz or 107kHz)

88 NC - Not used Output L ﬁ xed

89 DVCC3 - Power supply

90 DVSS - GND

91 SW DIO - For on-board writing

92 SW CLK - For on-board writing

93 TRACE CLK - For debug

94 TRACE DATA 0 - For debug

95 TRACE DATA 1 - For debug

96 TRACE DATA 2 - For debug

97 TRACE DATA 3 - For debug

98 AUD SDA I/O I2C data input/output (E-VOL IC control)

99 AUD SCL O I2C clock input/output (E-VOL IC control)

100 LX RST O Forced reset to slave unit H: Reset, L: Normal

101 LX MUTE I Mute request from slave unit H: Mute ON, L: Mute OFF

102 LX REQ M O Communication request to slave unit

103 LX CON O Start-up request to slave unit H: Slave unit ON, L: Slave unit OFF

104 USB PON O USB P.ON output H: ON, L: OFF

105 USB OC

106 NC - Not used Output L ﬁ xed

107 MUTE PRE

108 MUTE PRE SW

109 LX REQ S I Communication request from slave unit For external interrupt

110 TUN SDA I/O I2C data input/output (Tuner IC control)

111 TUN SCL O I2C clock output (Tuner IC control) I2C clock frequency: 200kHz

112 REMO I

113 REMO I Remote control signal input

114 REG VCC3 - Power supply

115 XT1 I Low frequency resonator connection Sub clock: 32.768kHz

116 XT2 O Low frequency resonator connection Sub clock: 32.768kHz

117 CVCC3 - Power supply

118 X1 I High frequency resonator connection Main clock: 12MHz

119 CVSS - GND

I/O AFS mute

O Power IC mute

O Power IC standby control POWER ON: H, POWER OFF: L

Detection of power IC’s +B and GND short-

circuited

I USB over-current detection L: Detected, H: Normal

O External preout mute O-bit or momentary power down: L, L: Mute ON

O External preout mute (SUB) O-bit or momentary power down: L, L: Mute ON

Input signal of remote control reception and

wired remote control

Truth Value

Table

Processing / Operation / Description

L: Mute ON (Time constant solo setting: 0.5ms),

Hi-Z: Normal

STANDBY source or momentary power down: L,

TEL mute: L

Communication with E2PROM for system

μ-COM data keeping

Communication with E2PROM for system

μ-COM data keeping

Pulse width detection

Even pin No.112 is being short-circuited, input

signal can be ignored in software

KDC-348U/4751SD/BT41U/BT648U /U4549/U4549SD/U549BT/X395/X695

MICROCOMPUTER’S TERMINAL DESCRIPTION

Truth Value

Pin No. Pin Name I/O Application

120 X2 O High frequency resonator connection Main clock: 12MHz

121 DVCC3 - Power supply

122 DVSS/REGVSS - GND

123 USB D+ I/O USB data connection

124 USB D- I/O USB data connection

125 NM IN I Non-maskabe interrupt

126 TEST1 - For test Output L ﬁ xed

127 TEST2 - For test Output L ﬁ xed

128,129 NC - Not used Output L ﬁ xed

130 AVCC3 - Power supply

131 SA IN I Input data for spectrum analyzer

132 AUD DC ERR

133 NC - Not used

134 LINE MUTE I Line mute detection

135~138 NC - Not used

139 TYPE 1 I Destination switching

140 TYPE 2 I Destination switching

141,142 NC - Not used

143 SERIAL DET I For serial number writing

144 NC - Not used

I DC offset detection

Table

Processing / Operation / Description

TEL mute: Below 1V (Model without BT func-

tion), NAVI mute: Over 2.5V

Truth value table

CD motor control

CD MOTOR (Pin 45) CD LOEJ (Pin 30) CD BRAKE (Pin 29)

Standby L L L

Eject H H L

Load H L L

Brake H H/L H

Power supply IC control SEL1 (Pin No.10 of IC1)

PS1-2 (Pin 58) PS1-3 (Pin 59) PS2-1 (Pin 60) ILLUMI P-CON P-ANT

L L L OFF OFF OFF

L L H ON OFF OFF

H L H ON ON OFF

H H H ON ON ON

Power supply IC control SEL1 (Pin No.11 of IC1)

PS1-1 (Pin 57) AUDIO/SW5/AM

L OFF

HON

KDC-348U/4751SD/BT41U/BT648U /U4549/U4549SD/U549BT/X395/X695

1. Panel

ACCENT

TEST MODE

RETURN

VOL

2. How to enter each Test Mode

Test Mode name Operation

Production Test Mode Press and hold [1] key and [3] key and reset.

Service Test Mode

Service information clear mode Press and hold [2] key and [5] key and reset.

DC Error Information Mode Press and hold [3] key and [6] key and reset.

Version display mode *1 While pressing and holding [RETURN] key, press [DISP] key.

Forced update mode Press and hold [1] key and [SEARCH] key and reset.

Transition to Test Mode shall be available during DC Error detection.

✳

*1: The model that does not support ﬁ rmware update function will not also support the version display mode.

In the STANDBY source, while pressing and holding [2] key, press [6] key for 7 seconds.

(Starting to press [2] key and [6] key at the same time can not be entered into the mode)

3. How to release each Test Mode

• Reset

• Momentary voltage drop

• ACC OFF

• POWER OFF

• Panel Detach

• Arbitrary key operation (ﬁ rmware and version display only)

4. Production Test Mode

How to enter the production test mode

●

Press and hold [1] key and [3] key and reset.

Default status immediately after the mode activation

●

It shall be same as normal RST start in other settings than the following.

Details

Period to prohibit TEL/LINE MUTE immediately

after activation (normally 10 seconds)

Initial CD mechanism operation at start-up Prohibited

Difference in action

Write-in to E2PROM when detecting a DC error Prohibited

Demo Mode ON/OFF Setting Menu Prohibited

Power supply during ACC OFF (Back Up On)

BEEP sound Beep with short-pressing in any functions

1 second

MUTE terminal turns OFF after 2 seconds (When the terminal

is turned OFF, the CD mechanism does not function)

KDC-348U/4751SD/BT41U/BT648U /U4549/U4549SD/U549BT/X395/X695

TEST MODE

Details

Volume 30 (-10dB)

BASS BOOST/LOUD OFF

Various setting value

Mode structure

●

Some Test Modes change according to the current source.

The following table shows the current source in Set and the related test mode status.

POWER OFF -

Standby STANDBY Test Mode

TUNER TUNER Test Mode

CD CD Test Mode

SD -

BT BT Test Mode (BT built-in model)

USB -

AUX -

EQ NATURAL

Fader/Balance Center

DEMO Mode Setting OFF

AUX Setting ON1

Model source Test mode

Basic operation of the [ACCENT] keys

●

BT built-in model



Source Condition Operation

Other than BT Mode/HF interruption

Transmit possible condition (displaying phone number) Transmit

BT Mode

HF interruption

SD built-in model



Source Condition Operation

Other than SD SRC

SD SRC

Transmit impossible condition BT Mode clear

Receiving Off Hook (connect)

Transmitting Off Hook (disconnect)

Connected Off Hook (disconnect)

Connected (receiving interruption) Interruption receiving Menu

Connected (receiving interruption Menu) Invalid

Connected (interruption connected) Disconnect (Parrot dependent)

SD inserted SD SRC

SD not inserted Invalid

BT Mode source

Easy Setting

■

Easy Setting

■

(Invalid)

■

Invalid

■

KDC-348U/4751SD/BT41U/BT648U /U4549/U4549SD/U549BT/X395/X695

TEST MODE

USB model



Source Condition Operation

iPod inserted iPod SRC

Other than iPod SRC

iPod SRC

Mode content

●

Syscon shall display the following information after entering this mode. The operation shown below shall be workable.

Display content Details

÷÷÷÷÷÷÷

STANDBY Test Mode Speciﬁ cation

●

Operation Display content Details

Syscom version display

BT module version

1 (Toggle)

2 (Toggle)

3 (Toggle) All lights ON/OFF

4 (Toggle)

USB

model only

5 (Toggle) Preout switch

display

Information display

Mechanism model name

Mechanism version

All lights ON

Serial No. display

All lights ON

Information display iPod

veriﬁ cation IC mount

status display

All lights ON/TEST

iPod not inserted Invalid

All lights ON

SYS01–200

SYS03–200

BT HXXXSXXXXX

9B20:

SN :00000000

iPod :

iPod :OK

iPod :NG

iPod :

SWP RE R E AR

SWP RE S UB – W

Syscom version

SYS01: BT/USB 13 digit model

SYS03: SD MODEL

BT module/version displlay (Target model: BT)

Mechanism model name and mechanism version

display

All lights ON (Switch with other display)

Serial No. display (8-digit)

Display as it is in hex

✳

All lights ON (Switch with other display)

All lights ON/OFF with toggle

iPod veriﬁ cation IC mount status display

Blank: Verifying

OK: Veriﬁ cation IC mounted

NG: Veriﬁ cation IC not mounted

∗∗

: Non-iPod support model

∗∗

All lights ON (Switch to other display)

Switch Preout with toggle

(KDC-4751SD/BT41U/U549BT)

Invalid

■

Invalid

iPod By Hand Mode

■

6 (Toggle) All lights ON/OFF Switches between all lights ON and all lights OFF

SOURCE

transition

RETURN Mode release

■

DISP Display blinks once when key is pressed.

BAND

Mode release Return to Normal mode

Return to Normal mode

Display blinks once when key is pressed.

TEST MODE

Tuner Test Mode Speciﬁ cation

●

The following display shall be indicated according to the TUNER status.

Status Display content Details

TUNER IC Normal Error

Adjustment not imple-

mented

RDS Speciﬁ ed data

reception

Operations



Operation

ACCENT

BAND

DISP

■

TUNER IC display

BAND switch

operation

S meter voltage

judgment display

Shift to TUNER

setting adjust-

ment mode

TUN CON NG

ERR

∗

Blink in 2Hz

RDS TE ST

ATOM RDS

FM1 – 3 A 9 7.9 A

S–MTR xx:OK

S–MTR xx:NG

S–MTR xx:––

∗

Display content Details

A97.9A

KDC-348U/4751SD/BT41U/BT648U /U4549/U4549SD/U549BT/X395/X695

Communication to TUNER IC not available (indicated unless

the mode is in Clock Display Mode).

For models that TUNER adjustment is necessary but not done

(adjustment value: 0x00 or 0xFF), the following TUNER Test

Mode functions are valid (“∗ERR∗” display is continuing).

Turn OFF P-CON forcibly if PS=RDS TEST is received.

P-CON recovers with Power OFF/ON.

Display TUNER IC version

Execute Band Switch as shown in the following table

every time Band key is pressed in each type.

S meter value xx: Current S meter value

Determination result OK: Within S meter voltage spec

NG: Out of S meter voltage spec

– – : No LEVEL OFFSET adjustment

Shift to TUNER setting adjustment mode after switching

to 98.3MHz

SG setting values

Frequency: 98.3MHz, Modulation frequency: 1kHz,

Modulation mode: MONO, Modulation: OFF,

Deviation: 40kHz, ANT input level: 34dBμV

TUNER Setting Adjustment Mode



Operation (Operation after performance of above-mentioned “Shift to TUNER setting adjustment mode” item)

Operation

BAND

■

(Toggle)

RETURN Mode release

AUTO Adjust-

ment Mode

Display content Details

Select TUNER adjustment method (AUTO) using [BAND] key.

S-xx: Current S meter value (Hex)

A S–xx L–xx

L-xx: Level offset value (Hex)

In case that the level offset value is not adjusted (0xFF

✳

or 0x00), display “– –”.

Return to TUNER Test Mode

2) Operation in AUTO Adjustment Mode

Operation

VOL

PUSH

Adjustment start

Display content Details

A S–xx L–xx

Start adjustment (Start Auto adjustment, and transit to Suc-

cess/Failure display depending on the adjustment result)

KDC-348U/4751SD/BT41U/BT648U /U4549/U4549SD/U549BT/X395/X695

TEST MODE

3) Status display during adjustment

Status Display content Details

Adjustment success

Adjustment failure

ADJ OK :x x

ADJ NG

4) Operation of return to TUNER Test Mode

Operation

RETURN Mode release Return to TUNER Test Mode.

BAND switch list



Type BAND1 BAND2 BAND3 BAND4 BAND5 BAND6 Details

FM1 FM2 FM3

Display content Details

When the adjustment value write-in to E2PROM (IC203 on X34)

has been completed. xx: Level offset value (HEX)

When the adjustment value write-in to E2PROM (IC203 on X34)

has failed

AM - -

MW/LW - -

MW SW1 SW2

q→w

CD Test Mode Speciﬁ cation

●

It shall be the same as normal RST start in other than the below setting.

Content Details

Playback track from top No.9

Default for Display mode Play time

Operations in CDDA playback



Operation





Special track

down

Special jump

operation

Special jump

operation

Special jump

operation

Special jump

operation

Display content Details

Every time pressed, track up/down performed as below.

No.9→No.15→No.10→No.22→No.12→No.13→No.14→No.9

However, playback is from No.1 for discs with 8 tracks or

less.

If transferred to tracks other than the above with B. Skip,

up/down is performed 1 track at a time to the nearest track

Jump to No.28

(Scratch 0.7mm for MUSIC line vibration test)

Jump to No.14 (Damaged disc TCD-731RA Tr14)

Jump to No.15

• Set Volume value at 27 (2.5V PREOUT MODEL)

• Set Volume value at 29 (4V PREOUT MODEL)

(for error operation FCT check of 20Hz 0dB DC protection)

Jump to No.9 if the track No.22 is playing.

Jump to No.22 if the track No.9 is playing.

BT test mode speciﬁ cation (BT built-in model)

●

Initial condition of the BT MODE (BT source) will display as following.

Status Display content Details

BT MODE

BT MODE display

Operations during BT MODE



Operation

KDC-348U/4751SD/BT41U/BT648U /U4549/U4549SD/U549BT/X395/X695

TEST MODE

Display content Details

ACCENT



■

BAND

■

Clear the BT

related memory

information *1

BT device

Internal loop

back ON *2

INIT IALIZE

BT INIT :OK

BT I N I T :NG

(The display blinks)

SEARCH I NG

xxxxxxxxxxxxx

UNKNOWN

INT LOOP F

INT LOOP R

Clear the BT MODE (BT source) and transition to the last

source. (Target model: BT)

Press and hold this key for 2 seconds. The character string

as shown in the left cell is displayed while the BT related

memory is being initialized. (Target model: BT)

This is to initialize the BT related memory to its factory de-

fault condition.

When the initialization is successfully completed, “…OK”

(upper) is displayed, and when the initialization is abnor-

mally completed, “…NG” (lower) is displayed.

(Target model: BT)

Press and hold this key for 1 second to initiate the BT de-

vice search.

The search is terminated when 1 device is found.

(Target model: BT)

When a device is found after the search, the name of that

device is displayed. (Target model: BT)

When no device is found at the completion of the search.

Only for this case, perform the search again by pressing the

[VOL PUSH] key brieﬂ y. (Target model: BT)

After the completion of the search, press and hold the

[BAND] key for 1 second to exit from the test mode.

(Target model: BT)

• Set the Volume to 22 and turn the internal loop back func-

tion ON by pressing and holding for 1 second.

• INT LOOP F: Display internal loop back by FRONT micro-

phone

• INT LOOP R: Display internal loop back by REAR micro-

phone

• Microphone setting initial value is FRONT for model with

microphone setting.

• Display microphone position for each model for model

without microphone setting.

• Details of display will not change except [F or R] if it is

ON.

+AM233 (Target model: BT)

Operations during internal loop back (only with KDC-BT648U)



Operation

DISP

(Toggle)

Switch micro-

phone

Display content Details

INT LOOP R

INT LOOP F

Microphone REAR setting

Microphone FRONT setting

*1: This is a function to clear the BT memory information recorded in the EEPROM and the FLASH memory to be initialized with

the “Data ﬂ ash clear” function, and to write the speciﬁ c values to initialize it to its factory default condition.

Factory default condition

• Clearing of the pairing information (FLASH memory of the BT module)

• Clearing of the preset telephone numbers (EEPROM)

• Writing “KENWOOD BT CD/R-3P1” in the friendly name (FLASH memory of the BT module)

+ 35 hidden pages