Kenwood DPX304 User manual

This product uses Lead Free solder.
This product complies with the RoHS directive for the European market.
PbF
DPX304/308U/404U
DPX-MP3120/U5120/U5120S
SERVICE MANUAL © 2011-5 PRINTED IN JAPAN
B53-0860-00 (N)303
2DIN CD RECEIVER
DC cord
(E30-6940-05)
DC cord
(E30-6939-05)
Screw set
(N99-1779-15)
Lever
(D10-7012-04) x2
Remote controller assy
(A70-2104-05)
Mounting hardware assy
(J22-0429-13)
Escutcheon
(B07-3025-02)
Escutcheon
(B07-3165-02)
Illustrations is DPX308U
Adhesive double-
coated tape
(H30-0595-04)
Compact disc (Manual)
(W01-1794-05)
RC-405
DPX304
DPX404U
DPX-MP3120
DPX-U5120
DPX-U5120S
Escutcheon
(B07-3172-12)
DPX308U
Installation caution
X34- R44 (RS14KB3DR22J)
3.5mm PRE CUT

2
DPX304/DPX308U/DPX404U
DPX-MP3120/U5120/U5120S
BLOCK DIAGRAM
(X34-700)
(X16-712)
PRE OUT
J401
ATOMIC
IC501
MUTE
SP OUT
PWIC
IC200
A8V
CN160
CD
E-VOL
BU5V
MUTE
LOGIC
IC302
SYSTEM
u-COM
IC301
IC420
BU5V
BU
USB5V PAN5V ILL+B
CN
SERVO+B
BU5V
BU5V
USB CN
J1
REMO
IC2
ROTARY
ENCODER
KEY IF
DRIVER
LCD
IC1
LCD
LCD
BACK LIGHT
ILLUMI
KEY
TRIANGLE
LED (RED)
AUX CN
J2
DC CN
BU5V
Q33
Q30
SW5V
Q21
A8V
PAN5V
Q701
ILL+B
SERVO+B
Q41
Q51
USB5V
IC140
D5V
IC70
BU5V
SW5V
A8V
PAN5V
SERVO+B
ILL+B
USB5V
Q80
BU DET
Q81
ACC DET
Q120
LINE MUTE
ILL DET
Q104
ANT CONT
Q103
P CONT
Q404
A8V
J3
CN1
CN700
ILL+B
J3
(4MHz)
RST 3.6V
IC300
FRONT, REAR/NF REAR L/R
FRONT L/R
RESET
P CON / ANT CON
BU DET / ACC DET
LINE MUTE / ILL DET
PON PAN / WIRED REMO
PON / PON ILL
17
2
1123
2
1
15
SUB=32.768kHz(QUARTZ)
CLK MAIN=24MHz(CERAMIC 12MHz)
RST SW
3
9
5
4
ANT CONT EXT REMO MUTE P.CONT BU ACC ILLUMI
ACC
ILLUMI
MUTE
ANT CONT
P.CONT
WIRED REMO
PON
PON
PON PAN
PON
PON ILL
PON
SW VBUS
BU DET BU
VBUS OC
ACC DET ACC
MUTE
ILL DET
MUTE
ILLUMI
ANT CON
P CON
ANT CONT
P CONT
3
21

3
DPX304/DPX308U/DPX404U
DPX-MP3120/U5120/U5120S
BU1.5V
BU3.3V
SW3.3V
DPU1
CD PLAYER UNIT (X32-6260-01) BOARD MOTHER
(X34- )
EF
A
C
B
TR COIL
FO COIL
APC
IC2
16.934MHz
CLOCK
IC3
LOADING &
MOTOR
DRIVER
MOTOR
SPINDLE
S2
S1
S3
SLED
MOTOR
DM1
DM2
X3
Q7
RF AMP
SERVO
MP3 DECODER
WMA DECODER
1Mbit SRAM
PROCESSOR
AAC DECODER
+
+
+
+
+
LEVEL
SHIFT
IC5
iPod
IC7
REG
BU3.3 /
AUTHENTICATION
LEVEL
IC6
SHIFT
IC1
u-COM
Q5
SW BU1.5V
IC9
SW3.3V
REG
Q3
SW
CLOCK
9.000MHz
X1
32.768kHz
CLOCK
X2
IC4
INV
Q9
MECHANISM
VREF
12EJE SW
LOS SW
LOE SW
MOTOR
LO/EJ
AGND
TRO
FOO
DMO
FMO
LD
SIGNAL A/B/C/E/F
S.GND
S7.5V
FOO
TRO
DMO
FMO CD DRIVE MUTE
SO
SRAMSTB
SI
BUCK
CCE
CD REQ
MSTOP
BUCK
CCE
REQ
SO
SI
RST
MRST
Lch
Rch
Z DET
MUTE L/R
DGND
DVSS BU1.5V SW1.5V D3.3V
BU5V
PD
VBUS SW
USB+
VBUS OC
USB-
DATA SCD SI
REQ A
MRST
MSTOP
CLK
CD MUTE
REQ M
DATA M
USB D+
USB D-
USB VBUS SW
USB OC
CD LOE LIM SW RVIN1/RVIN2 DVCC3B PON DVSS DVCC3A PWE
CD SO
DSP REQ
CD CLK
CD RST
ZDET IN
CD SRAMSTB
CE
BSIF LRCK
BSIF DATA
BSIF BCK
BSIF GATE
BSIF ST REQ
IPOD SDA
IPOD SCL
AVSS A3.3V LO RO
BSIF ST REQ
BSIF GATE
BSIF DATA
BSIF BCK
BSIF LRCK
G
D
S
DPX304, DPX-MP3120
DPX308U/DPX404U, DPX-U5120/U5120S
BLOCK DIAGRAM
DPU1
CD PLAYER UNIT (X32-6240-00) BOARD
MOTHER
(X34- )
EF
A
C
B
TR COIL
FO COIL
APC
IC4
16.934MHz
CLOCK
IC3
LOADING &
MOTOR
DRIVER
MOTOR
SPINDLE
S2
S1
S3
SLED
MOTOR
DM1
DM2
X1
Q1
RF AMP
SERVO
MP3 DECODER
WMA DECODER
1M bit SRAM
PROCESSOR
AAC DECODER
+
+
+
+
+
LEVEL
SHIFT
Q11
SHIFT
LEVEL
Q12
LEVEL SHIFT
RESISTOR
SHIFT
LEVEL
Q10
FILTER
FILTER
REVERSAL
CIRCUIT
Q13
D1.5V
IC5
Q14 REG
BU1.5V/
OUTPUT
D3.3V
VREF
12EJE-SW
LOS-SW
LOE-SW
MOTOR
LO/EJ
A.GND
TR OUT
FO OUT
DM OUT
FM OUT
A3.3V
LD
SIGNAL A/B/C/E/F
S.GND
S7.5V
FO OUT
TR OUT
DM OUT
FM OUT
DRV MUTE
SO
SRAM STB
SI
BUCK
CCE
PIO0
R15
SRAM STB
BUCK
CCE
PIO0
SO
SI
MRST MRST
C43
C44
Rch
Lch Lch
Rch
ZDET MUTE L/R
D.GND
D GND BU1.5V D1.5V D3.3V
AGND
BU5V
P.ON
PD

4
DPX304/DPX308U/DPX404U
DPX-MP3120/U5120/U5120S
●SWITCH UNIT (X16-7120-2x)
Ref. No. Application / Function Operation / Condition / Compatibility
IC1 LCD Driver ED1 Drive.
IC2 Remote Control Receiver
Q1 LED Driver KEY Illumination Driver (Blue)
Q2 LED Driver KEY Illumination Driver (Green)
Q3 LED Driver KEY Illumination Driver (Red)
Q4 LED Driver KEY Illumination Driver (Blue)
Q5 LED Driver KEY Illumination Driver (Green)
Q6 LED Driver KEY Illumination Driver (Red)
Q7 LED Driver LCD Back light Illumination Driver (Blue)
Q8 LED Driver LCD Back light Illumination Driver (Red)
Q9 LED Driver LCD Back light Illumination Driver (Green)
Q10 KEY Input timing switch
●ELECTRIC UNIT (X34-700x-xx)
Ref. No. Application / Function Operation / Condition / Compatibility
IC70 USB5V & REMO IC Power Supply Switching Regulator.
IC140 Power Control Switch USB5V power control switch with over current detection and protection.
IC200 Power IC Amplifies front L/R and rear L/R to 45W maximum.
IC300 System μ-com Reset Control Output “L” (System μ-com Reset), when detection voltage goes below 3.6V
or less.
IC301 System μ-com System control. Power management. Panel, AM/FM, External etc.
IC302 MUTE Logic Controls logic for muting.
IC420 Source Selector & Electrical Volume Select source & Full source volume. Speaker out “DC-Offset” detection and
protection. (This function consists of IC200 and IC420.)
IC501 Advanced tuner on main-board IC
The TEF6614TV1S4-X/TEF6614TV1S3-X is an AM/FM radio including Phase-
Locked Loop (PLL) tuning system. It includes a newly developed demodula-
tor for data reception of RDS and RBDS transmissions.
Q21~26 Audio 8V AVR System power on time output 8V.
Q30,31 Switch 5V Active time is Power ON.
Q32,33 Backup5V AVR Always output 5V.
Q40,41 Servo AVR CD Servo
Q42,44~47 Over current detection Over current detection
Q50~53 ILL+B AVR Active time is Power ON.
Q80 Backup detect switch Check of Backup voltage. It is on if good.
Q81 ACC detect switch Check of ACC voltage. It is on if good.
Q82 Surge detect switch Check of over input voltage. Detects it in on.
Q100~103 Power control switch Active time is Power ON.
Q104,105 Power antenna switch Active time is AM/FM source.
Q120 Small lamp detect switch Check of small lamp. Detects it in on.
Q400 Preout mute switch SW/REAR Lch
Q401 Preout mute switch SW/REAR Rch
Q402 Preout mute switch FRONT Lch
Q403 Preout mute switch FRONT Rch
Q404 Preout mute Driver When this Tr does on, it is mute.
Q700,701 Panel 5V AVR Active time is Power ON.
COMPONENTS DESCRIPTION

5
DPX304/DPX308U/DPX404U
DPX-MP3120/U5120/U5120S
COMPONENTS DESCRIPTION
●CD PLAYER UNIT (X32-6240-00): DPX304, DPX-MP3120
Ref. No. Application / Function Operation / Condition / Compatibility
IC3 4ch BTL Driver Driver for focusing & tracking coil, driver for sled & spindle motor, and opera-
tion for disc loading & ejection.
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. Power supply for BU1.5V.
Power supply for digital/analogue/audio 3.3V.
Q1 APC (Auto Power Control) Drives LD (Laser Diode).
Q10~12 5V-3.3V Level Shift Converts signal from 5V to 3.3V, or from 3.3V to 5V.
Q13 Inverter Inverts ZDET (Zero data DETection) signal.
Q14 D1.5V Output
Switches ON/OFF at one end of BU1.5V line which is separated into 2 direc-
tions.
Uses output voltage as D1.5V.
D1 Level Down Lowers signal level by about 1.2V so that Lo level signal that turns the regula-
tor ON/OFF surely becomes Lo judgment level of the regulator SW.
D2 Laser Diode Protection Prevents reverse bias which is applied to laser.
Laser destruction prevention.
D3,4 Static Electricity Countermeasure Prevents malfunction by static electricity.
●CD PLAYER UNIT (X32-6260-01): DPX308U/DPX404U, DPX-U5120/U5120S
Ref. No. Application / Function Operation / Condition / Compatibility
IC1 Mechanism μ-com
Controls DSP and peripheral circuit.
USB host controller. (Compliant with Universal Serial Bus Specification
Rev2.0)
IC2 Servo DSP with Built-in Audio DAC Built-in MP3·WMA·AAC decoder.
Built-in 1M-bit-SRAM.
IC3 4ch BTL Driver Driver for focusing & tracking coil, driver for sled & spindle motor, and opera-
tion for disc loading & ejection.
IC4 iPod Authentication Connection authentication for iPod.
MFI341S2162: iPhone-compliant.
IC5 3.3V→5.0V Level Shift Converts communication signal from 3.3V to 5.0V.
IC6 5.0V→3.3V Level Shift Converts communication signal from 5.0V to 3.3V.
IC7 BU1.5V/ BU3.3V Regulator Power supply for digital back-up.
Power supply for mechanism μ-com.
IC9 A3.3V Regulator Power supply for digital, analog and audio line.
Q3 D1.5V Output The output voltage in which the power supply that diverges from the BU1.5V
line is turned on and off is used as D1.5V.
Q5 B.3.3V Output The output voltage in which the power supply that diverges from the BU3.3V
line is turned on and off is used as D3.3V.
Q6 Control signal Inverter Controls Q5.
Q7 APC (Auto Power Control) Laser diode driver.
Q9 Control signal Inverter
Because the detection logic of LOE/LIM_SW is different in the mechanism
μ-com and the system μ-com, the logic to the mechanism μ-com side is
reversed.
D1 Laser Diode Protection Prevents reverse bias which is applied to laser.
Laser destruction prevention.
D2,3 Countermeasure against Static Electricity The potential difference between DGND and AGND is absorbed, and the mal-
function by static electricity is prevented.

6
DPX304/DPX308U/DPX404U
DPX-MP3120/U5120/U5120S
MICROCOMPUTER’S TERMINAL DESCRIPTION
●SYSTEM μ-COM R5F3650KDFB (X34-700: IC301)
Pin No. Pin Name I/O Application
Truth Value
Table
Processing Operation Description
1 REMO I Remote controller input (INFRARED, WIRED) Pulse width detection
2~5 NC O Not used Output L fixed
6 BYTE -
7 CNVSS - Software writing-in mode control e
8 XCIN - Sub-clock OSC_in 32.768kHz
9 XCOUT - Sub-clock OSC_out 32.768kHz
10 RESET -
11 XOUT - Main-clock OSC_out 12MHz
12 VSS -
13 XIN - Main-clock OSC_in 12MHz
14 VCC1 -
15 NC (NMI) O Output L fixed
16 ROTARY_CCW I VOL encoder input Pulse width detection
17 ROTARY_CW I VOL encoder input Pulse width detection
18 NC O Not used Output L fixed
19 LCD_RESET O LCD_RESET H: Normal, L: RST
20 LED_LCD_BLUE O Vari_Blue_LCD_PWM output H: ON, L: OFF, PWM frequency: 23kHz
21 NC O Not used Output L fixed
22 LED_LCD_GREEN O Vari_Green_LCD_PWM output H: ON, L: OFF, PWM frequency: 23kHz
23 NC O Not used Output L fixed
24 LED_LCD_RED O Vari_Red_LCD_PWM output H: ON, L: OFF, PWM frequency: 23kHz
25 LCD_CE I/O LCD control request H: Data transmission enabled
26 PWIC_BEEP O BEEP output terminal 2kHz/1kHz
27 TUN_SCL I/O TUNER_I2C clock I/O terminal 200kHz (Limitation of ATOMIC)
27 FLASH_SCL I/O For Serial No/ ROM correction I2C clock
28 TUN_SDA I/O TUNER_I2C data I/O terminal 200kHz (Limitation of ATOMIC)
28 FLASH_SDA I/O For Serial No/ ROM correction I2C data
29 NC O Not used Output L fixed
29 TXD1 O Data for system μ-com →writer
30 NC O Not used Output L fixed
30 RXD1 I Data for writer →system μ-com
31 NC O Not used Output L fixed
31 CLK1 I Clock for writer →system μ-com
32 NC O Not used Output L fixed
32 BUSY O BUSY for system μ-com →writer
33 LCD_SYS_DATA O Data for system μ-com →LCD LCD data output
34 LCD_PAN_DATA I Data for LCD →system μ-com LCD data input
35 LCD_CLK O LCD_CLK output LCD clock output (125kHz)
(Maximum: 1.5625MHz)
36 CD_DISC12_SW I CD disc detection terminal (12cm) L: 12cm disc
36 CD_DISK12_SW I CD disc detection terminal (12cm)
37 CD_LOE_LIM_SW I CD detection terminal (Chucking detection) H: Loading completed, L: No disc
37 CD_LOELIM_SW I CD detection terminal (Chucking SW) H: Loading completed, L: No disc
38 M_STOP O Mechanism stop terminal H: Normal, L: Stop SOC

7
DPX304/DPX308U/DPX404U
DPX-MP3120/U5120/U5120S
Pin No. Pin Name I/O Application
Truth Value
Table
Processing Operation Description
38 NC (9B1) O Not used (9B1) Output L fixed
39 ROMCOR_DET I ROM correction writing-in request H: Can overwrite ROM correction
(Switch SDA6 and SCL6 to slave operation)
39 EPM I EPM input terminal when writing-in eL: Overwriting mode (In overwriting mode, the set-
ting of the other terminals are also necessary)
40 CD_MUTE I Mechanism mute request L: MUTE request, H: In normal operation
40 CD_MUTE I CD_MUTE request terminal L: MUTE request, H: In normal operation
41 CD_CD_REQ I Communication request of mechanism
→system μ-com
41 CD_PIO0 I Communication request terminal from
mechanism DSP H: Data request
42 M_RST O Mechanism reset terminal H: Normal, L: Reset
42 M_RST O CD mechanism RST terminal H: Normal, L: Reset
43 NC (9B3) O Not used (9B3) Output L fixed
43 CD_SRAMSTB O 1MbitSRAM standby terminal L: SRAM standby
44 CD_LOS_SW I CD loading detection terminal L: Eject completed
44 CD_LOS_SW I CD loading detection terminal
44 FLASH_CE I CE when overwriting software e
45 CD_SYS_DATA O Data for system μ-com →Bolero
45 CD_SI O CD mechanism serial input
46 CD_CD_DATA I Data for Bolero →system μ-com
46 CD_SO I CD mechanism serial output
47 CD_CD_CLK I CLK from Bolero
47 CD_CLK O Serial clock output
48 CD_SYS_REQ O Communication request for system μ-com
→mechanism
48 CD_CCE O CD mechanism chip enable terminal
49 NC (9B3) O Not used (9B3) Output L fixed
49 PON_CD O CD mechanism power control terminal H: Power ON
50 NC (9B3) O Not used (9B3) Output L fixed
50 CD_DRIVEMUTE O Motor driver mute output wL: MUTE
51 CD_LOEJ I/O CD motor control terminal w
51 CD_LOEJ I/O CD motor control terminal w
52 CD_MOTOR O CD motor control terminal wH: LO/EJ mode
52 CD_MOTOR I/O CD motor control terminal wH: LO/EJ mode
53 LED_KEY_GREEN O Vari_Green_KEY_PWM output H: ON, L: OFF, PWM frequency: 100Hz
54 LED_KEY_RED O Vari_Red_KEY_PWM output H: ON, L: OFF, PWM frequency: 100Hz
55 LED_KEY_BLUE O Vari_Blue_KEY_PWM output H: ON, L: OFF, PWM frequency: 100Hz
56~59 NC O Not used Output L fixed
60 VCC2 -
61 NC O Not used Output L fixed
62 VSS -
63 PON_PANEL I/O Panel 5V control terminal H: ON, Hi-Z: In 11 minutes after ACC_OFF
64 PON_ILL I/O Panel LED power supply control H: ON, Hi-Z: OFF
65 PON I/O Power supply control terminal H: ON, Hi-Z: OFF
MICROCOMPUTER’S TERMINAL DESCRIPTION

8
DPX304/DPX308U/DPX404U
DPX-MP3120/U5120/U5120S
MICROCOMPUTER’S TERMINAL DESCRIPTION
Pin No. Pin Name I/O Application
Truth Value
Table
Processing Operation Description
66 BU_DET I BU detection L: With BU, H: When without BU/ reduced volt-
age/ over voltage
67 ACC_DET I ACC detection With ACC: L, Without ACC: H
68 LINE_MUTE I Line mute detection
1V or less: TEL_MUTE (MUTE),
2.5V or more: NAVI_MUTE (ATT),
J-TYPE is 1V or less, NAVI_MUTE is activated in
2.5V or more
69 P_CON I/O PCON control terminal H: POWER_ON, Hi-Z: Power_Off, STBY source
70 ANT_CON I/O ANTCON control terminal
(Other than E-TYPE) H: Tuner source, Hi-Z: Other than Tuner
70 NC O Not used (E-TYPE) Output L fixed
71 ILLUMI_DET I Dimmer illumi detection L: ON, H: OFF
72 DC_DET_2 I PWIC short to VCC/ GND detection terminal
73 PWIC_MUTE O PWIC mute terminal L: In STANDBY source, During momentary power
down, or in TEL_MUTE
74 PWIC_STBY O PWIC standby control H: Power_On, L: Power_Off
75 AUD_SDA I/O E-VOL data input terminal
76 AUD_SCL I/O E-VOL clock output terminal
77 MUTE O MUTE terminal L: MUTE_ON, H: MUTE_OFF
78 NC O Not used Output L fixed
79 DC_DET_1 I DC offset detection terminal
Threshold value: Determined as DC offset detec-
tion when less than 1.0V is observed 20 times for
every 100mS
80~88 NC O Not used Output L fixed
89 TYPE_DOP_1 I DOP destination switch 1 q
90 NC O Not used
91 NC O Not used Output L fixed
92 TYPE I Destination switch q
93 NC O Not used Output L fixed
94 AVSS -
95 NC O Not used Output L fixed
96 VREF -
97 AVCC -
98,99 NC O Not used Output L fixed
100 NC
(Kenwood brand model)
O Not used (Kenwood brand model) Output L fixed
100 STE_REMO I Steering remote controller input (DOP) AD

9
DPX304/DPX308U/DPX404U
DPX-MP3120/U5120/U5120S
MICROCOMPUTER’S TERMINAL DESCRIPTION
Truth Value Table
qDestination setting
Mid Low Common to Mid/ Low
TYPE1
(92) Destination Test mode display
TYPE1
(92) Destination Test mode display
TYPE_DOP_1
(89) Destination Test mode display
1DPX-U5120
DPX-U5120S 1023WM 1 DPX-MP3120 1024WM 1 Kenwood brand model
2 DPX-U500 1023WJ 2 2 Mitsubishi
3 (Reserve) 3 (Reserve) 3 Mazda
4 DPX308U 1023WK 4 4 Honda
5 DPX404U 1023WE 5 DPX304 1024WE 5
wCD_MOTOR, CD_LOEJ eConditions to overwrite built-in FLASH memory
CD_MOTOR CD_LOEJ Signal Input level
Standby L L CNVSS H
Eject H H EPM L
Load H L RESET L →H
Brake H Hi-z CE H
P6_5/CLK1 L

10
DPX304/DPX308U/DPX404U
DPX-MP3120/U5120/U5120S
TEST MODE
1. Overview
●Target models
MODEL NAME DEVELOPMENT CODE TYPE
Mid
DPX-308U C-1023WK K
DPX-U5120/DPX-U5120S C-1023WM M
DPX-U500 C-1023WJ J
DPX-404U C-1023WE E
Low DPX-MP3120 C-1024WM M
DPX-U304 C-1024WE E
●Exterior specification
Exteriors and key assign and names in all the target models, are as shown below.
Exterior









2
>=; .
@:
8 B
Key assign and names
No. Key Assign No. Key Assign No. Key Assign No. Key Assign
1 ROTARY UP 6 SEARCH 11 SEEK UP 16 PRESET-3
2 ROTARY DOWN 7 B.BOOST 12 DISP 17 PRESET-4
3 ENTER 8 RETURN 13 ATT 18 PRESET-5
4 SRC 9 BAND 14 PRESET-1 19 PRESET-6
5 iPod/Play Pause 10 SEEK DOWN 15 PRESET-2 20 EJECT
●How to enter the test mode
Processing details Key operation
Test mode function [B.BOOST] + [SEARCH] + Reset
Forced Power ON mode function [ENTER] + [PRESET-4] + Reset
DC error detection information display function [PRESET-3] + [PRESET-6] + Reset
Frequency span switching function [PRESET-1] + [PRESET-5] + [SRC] (Power ON)
Security code forced deletion function Press and hold [BAND] + [SEEK UP]
Forced frequency display switching function Press and hold [PRESET-1] + [PRESET-6]
ROM correction writing-in function [PRESET-6] + [SEARCH] + Reset
DOP setting function [ATT] + [PRESET-6] + Reset

11
DPX304/DPX308U/DPX404U
DPX-MP3120/U5120/U5120S
TEST MODE
●Description explanation
Display specification of this document is described by the following forms.
÷÷÷÷
Key Description of display Description
5Disc Eject
count display
EJCNT: XXXXX Disc Eject count display (Max. 65535 times).
■
5EJCNT: 00000 While Disc Eject count is displayed, press and hold for 2
seconds or longer to clear Disc Eject count.
*A symbol “■” in the key column indicates that the key should be pressed and held.
2. Test mode function
●How to transfer to the mode
Perform the reset operation while pressing and holding [B.BOOST] + [SEARCH] to transfer to the test mode.
●How to clear the mode
Clear the test mode with the conditions below.
• Reset
• Momentary power down detection
• ACC OFF operation
• POWER OFF operation
●Limitation/ special remarks in the mode
• When detecting the disconnection of the oscillator for sub-clock, all lights ON display flashes.
• When the unit starts with the test mode, change the LINE MUTE inhibit time from 10 seconds to 1 second.
• In the test mode, do not write serial with the serial write jig.
• In the test mode, the DC error detection information is not written in Data Flash even if the DC error detection is performed.
• DEMO mode shall not operate in the test mode. Also, when the source is STANDBY, do not display DEMO ON/OFF switching
items in the FUNCTION.
• DISC forced load operation prohibited in the test mode.

12
DPX304/DPX308U/DPX404U
DPX-MP3120/U5120/U5120S
TEST MODE
• In the test mode, even if the prescribed period of time elapses, the backup memory items are not written in save area (Data
Flash/ E2PROM).
• In the test mode, the opening display shall be omitted for the easy recognition of the mode transfer.
• In the test mode, the animation after the source switching shall be omitted to reduce waiting time.
*The MID/ LOW model shall operate in the same manner as the normal operation because there is no animation display after
the source switching.
• In the test mode, DOP setting is unavailable (Except only for DOP TYPE display).
• In the set for E destination, even if security is allowed, Power ON can be maintained only for 30 minutes.
●Initial setting
Differences from normal operation
• All LCDs are ON.
• VOLUME setting value shall be 30.
• KEY ON BEEP setting shall be ON regardless of destination of the set.
• Base Boost setting shall be OFF..
• Illumi settings shall be R255, G255, B255 (white).
Special notes to be added though the same as normal
• CRSC setting shall be ON. *ON/OFF is not included in this model.
• Initial settings of 1PRE/ 2PRE model shall be REAR.
●Special function with STANDBY source while all the lights are turned on
Special screen displays and key operations in the test mode are described below.
(A symbol “■” in the key column indicates that the key should be press and hold.)
Key Description of display Description
All lights ON ÷÷÷÷
All lights ON
iPod/
Play Pause
iPod
authentication IC
installation
condition display
iPod :##
iPod authentication IC installation condition display
Pressed when the left is displayed, it will return to the
all lights ON display.
The display of ## in the left is as follows.
Blank: Searching and deciding the present status.
OK: Authentication IC has been installed
NG: This is the iPod compatible model, but the
authentication IC is not yet installed
∗ ∗: This is not the iPod compatible model
SEARCH DISP & ILLUMI
color switching
Switches DISP & ILLUMI color (forward rotation).
White (R255/G255/B255) →Red (R255/G0/B0) →
Green (R0/G255/B0) →Blue (R0/G0/B255) →White…
■
B.BOOST Preout setting
switching SWPRE #####
While pressing and holding this key for 1 second,
toggle the preout setting. (1Preout/ 2Preout model
only)
The display of ## in the left is as follows.
REAR: REAR setting
SUB-W: SUB WOOFER setting
RETURN
(Toggle)
All lights ON/
All lights OFF
÷÷÷÷
÷÷÷÷
Toggles between all lights ON and all lights OFF.
However, when [RETURN] is pressed briefly, all lights
ON shall be applied.
BAND Serial No. display SN ########
Serial No. display (8 digits)
The display of ## in the left is as follows.
In writing-in: Serial No. (8 digits)
Not in written-in: Displays “EEEEEEEE”.

13
DPX304/DPX308U/DPX404U
DPX-MP3120/U5120/U5120S
TEST MODE
Key Description of display Description

Forced Power
OFF information
display
POF F # # #
Forced Power OFF information display
The display of ## in the left is as follows.
No forced POWER OFF: –– –
Communication error between system μ-com and
panel: PNL
■

Forced Power
OFF information
initialization
In the forced Power OFF information display, press
and hold this key for 2 seconds to clear Power OFF
information.
Audio data
initialization AUD I O I N I T AUDIO setting values are reset to the default values in
the test mode.
DISP
CD information
display mode
ON
Transfer to the CD information display mode (sub-
mode).
*For the details of display and operation procedure,
refer to the “CD information display mode”.
■
ENTER
All of the CD
information
initialization
Press and hold this key for 2 seconds in respective
service information displays to clear all of the CD
information.
1
(forward
rotation)
System μ-com
version display SYS0 1 – 3.0 0
System μ-com version display
MID: SYS03-x.xx
LOW: SYS04-x.xx
DOP information
display DOP :0001
DOP information display
*Displays DOP type in 4 digits.
*Displays “– – – –” for Kenwood brand model.
(Pressing [PRESET-1] key briefly again, MID model
transfers to the mechanism model name and mecha-
nism version display, and LOW model transfers to the
all lights ON display)
Mechanism
model name
Mechanism
version display
9B20 :
Mechanism model name and mechanism version
display
*Displayed only in MID model.
(Pressing [PRESET-1] key briefly again, it transfers to
the all lights ON display)
■
1Version display
mode ON
Press and hold this key for 1 second to display the
version.
*For the details of display and operation procedure,
refer to the “Version information display mode”.
2ROM correction
version display
System μ-com Mechanism μ-com
SR0001 MR0001
The number indicates ROM correction number.
*In LOW model, there is no mechanism μ-com ROM
correction version display
System μ-com Mechanism μ-com
SR–––– MR–––– When not written-in
System μ-com Mechanism μ-com
SR∗∗∗∗ MR∗∗∗∗
When the data is incompatible
*Different version
3Power ON time
display
PONTM: 0HXX Displays 00~50 in “XX”. Displays it for less than 1 hour
in the unit of 10 minutes.
PONTM: XXXXX Displays 00001~10922 in “XXXXX”. MAX 10922 (hour)
■
3
Power ON time
information
initialization
PONTM: 0H0 0 Press and hold this key for 2 seconds in the Power
ON time display, to clear Power ON time

14
DPX304/DPX308U/DPX404U
DPX-MP3120/U5120/U5120S
TEST MODE
Key Description of display Description
4Disc operation
time display
CDTM : 0HXX Displays 00~50 in “XX”. Displays it for less than 1 hour
in the unit of 10 minutes.
CDTM : XXXXX Displays 00001~10922 in “XXXXX”. MAX 10922 (hour)
■
4
Disc operation
time information
initialization
CDTM : 0H00
Press and hold this key for 2 seconds in the Disc op-
eration time display, to clear the Disc operation time
(Cleared only for the media in display)
5Disc EJECT
count display EJCNT: XXXXX Disc EJECT count display.
MAX 65535 (times)
■
5
Disc EJECT
count information
initialization
EJCNT: 00000 Press and hold this key for 2 seconds in the Disc Eject
count display, to clear Disc Eject count
6
Data flash
writing-in count
display
DFCNT: XXXXX Data flash writing-in count display
MAX 10000 (times)
CD information display mode (sub-mode)
Key Description of display Description
DISP
(forward
rotation)
CD mechanism
error log display
MECHA E R 1 :X X Mecha error history 1 (latest)
XX: numbers of errors, “––” when there is none
MECHA E R 2 :X X Mecha error history 2 (latest)
XX: numbers of errors, “––” when there is none
MECHA E R 3 :X X Mecha error history 3 (latest)
XX: numbers of errors, “––” when there is none
CD load error
information
display
LOAD ER1 :XX Load error switch 1
XX: numbers of errors, “––” when there is none
LOAD ER2 :XX Load error switch 2
XX: numbers of errors, “––” when there is none
CD Eject error
information
display
EJ ECT ER1 :XX Eject error switch 1
XX: numbers of errors, “––” when there is none
EJECT ER2 :XX Eject error switch 2
XX: numbers of errors, “––” when there is none
EJECT ER3 :XX Eject error switch 3
XX: numbers of errors, “––” when there is none
EJECT ER4 :XX Eject error switch 4
XX: numbers of errors, “––” when there is none
CD time code
error count
information
display
(count skip)
CNT LOSE CD time code error count information (count skip)
mode display
CDDA :XX CD-DA error count numbers
XX: numbers of errors and “––” when there is none
CDROM :X X CD-ROM (compressed file) error count numbers
XX: numbers of errors and “––” when there is none
CD time code
error count
information
display
(no count update)
CNT S T AY CD time code error count information (count not up-
dated) mode display
CDDA :XX CD-DA error count numbers
XX: numbers of errors and “––” when there is none
CDROM :X X CD-ROM (compressed file) error count numbers
XX: numbers of errors and “––” when there is none

15
DPX304/DPX308U/DPX404U
DPX-MP3120/U5120/U5120S
TEST MODE
Key Description of display Description
ROTARY UP
CD information
display switching
(forward rotation)
In CD information display mode, perform the display
switch of displayed information (forward rotation).
(Ex.) CD eject error information display
Eject error 1 →Eject error 2 →Eject error 3 →
Eject error 4 →(to Eject error 1).
ROTARY
DOWN
CD information
display switching
(reverse rotation)
In CD information display mode, perform the display
switch of displayed information (reverse rotation).
(Ex.) CD eject error information display
Eject error 1 →Eject error 4 →Eject error 3 →
Eject error 2 →(to Eject error 1).
RETURN All lights ON ÷÷÷÷
Transfer to the all lights ON display mode.
Version information display mode (sub-mode)
Key Description of display Description
BAND
(forward
rotation)
Destination termi-
nal
status display
TYPE :# TYPE shows the destination of μ-com and displays
the status of destination terminal in real time.
Development
code
status display
XXXXWY –Z.ZZ
XXXX: Development name *Mid: 1023, Low: 1024
Y: Destination *Mid: M/J/E/K, Low: M/E
Z.ZZ: Version (μ-com)
■
1 All lights ON ÷÷÷÷
Press and hold this key for 1 second to reset the
mode and transfer to the all lights ON display mode.
RETURN All lights ON ÷÷÷÷
Press this key briefly to reset the mode and transfer to
the all lights ON display mode.
*Basically, the operation in all lights ON display mode shall be effective, and then this mode is reset automatically.
●TUNER source test mode
TUNER special display mode
Key Description of display Description
F/E error display
TUN CON NG
[TUNER IC communication error]
This display indicates the status in which the commu-
nication with TUNER IC is not possible.
∗ERR∗A 9 8.3 A
[Adjustment not yet made]
When the TUNER adjustment has never been made
(Adjustment value: 0x00 or 0xFF)
“∗ERR∗” display shall be the blinking display. And it
continues in normal mode.
Normal display
(RDS automatic
measurement
function)
RDS T EST
[Display in RDS automatic measurement]
To reduce the process of the visual inspection of the
PS display that has been executed up to now in the
production line, a function concerned is installed as
an alternate.
Turn off the P-CON terminal forcibly after receiving PS
data to display “RDS_TEST” in the PS. (“_” indicates
blank.)
*While a function concerned is dedicated to the test
mode process, P-CON shall be resumed by Power
OFF →ON.

16
DPX304/DPX308U/DPX404U
DPX-MP3120/U5120/U5120S
TEST MODE
Key Description of display Description
■
DISP Mode transfer
Press and hold for 1 second to enter the TUNER set-
ting adjustment mode (AUTO). When the source is FM,
frequency is switched to 98.3MHz (M/E/K), 83.0kHz (J)
at the start of the adjustment mode.
BAND Band switching
Every time when the [BAND] key is pressed, the BAND
is switched as shown below.
M/K: FM1 ↔AM, E: FM1 ↔MW/LW, J: FM1 ↔AM1
*
When switching the band in FM →AM, switched to
the center frequency.
*M/J/E type →999kHz, K type →1000kHz
RETURN Mode transfer Only in FM band, transfers to the S-meter voltage
pass and fail evaluation mode.
TUNER setting adjustment mode
Adjust TUNER setting. Only during the TUNER setting adjustment mode, Volume operation by turning the Rotary is prohibited.
After the TUNER setting adjustment, the entire test modes can be cleared with the reset button.
If you do not save the adjustment value after the adjustment, the value is not saved in the Data Flash.
When the level offset value is read out and found to be 0x00 or 0xFF, it is decided that the adjustment is not yet made.
The adjustment starts with the default value (0x3E) when the adjustment is started from the status in which it is not yet made.
qTUNER setting adjustment mode (AUTO)
Key Description of display Description
Normal display A S–xx L–xx
[Level Offset adjustment (Auto)]
S-xx: Current S-meter value (Hex)
L-xx: Level offset value (Hex)
*When the level offset value is not adjusted (0xFF or
0x00), “– –” is displayed.
ENTER
In automatic
adjustment A S–xx L–xx Press this key briefly to start the automatic adjust-
ment.
Automatic
adjustment
complete
Save the
adjustment value
Level offset value
ADJ OK :XX
When written to data flash after automatic adjustment
is completed, level offset value (Hex) of the adjust-
ment result is displayed.
Automatic
adjustment
failure
Failure value
(0xFF) Memory
ADJ NG
Display shown when the automatic adjustment failed.
(Write 0xFF to data flash. After re-entering adjustment
mode by this, start with “– –”.)
DISP Adjustment mode
switching
Press the key briefly to enter the TUNER setting ad-
justment mode (MANUAL).
ATT Adjustment mode
switching
Press the key briefly to enter the TUNER setting ad-
justment mode (MANUAL).
RETURN Mode clear Clear the adjustment mode to transfer to the TUNER
special display mode.

17
DPX304/DPX308U/DPX404U
DPX-MP3120/U5120/U5120S
TEST MODE
wTUNER setting adjustment mode (MANUAL)
Key Description of display Description
Normal display M S–xx L–xx
[Level Offset adjustment (Manual)]
S-xx: Current S-meter value (Hex)
L-xx: Level offset value (Hex)
*When the level offset value is not adjusted (0xFF or
0x00), “– –” is displayed.
/
■
/
Level Offset
adjustment
(Manual)
M S–xx L–xx Press []/[] key for 500ms or longer to continuously
increase/ decrease the adjustment value.
ENTER
Completion of
the adjustment
value saving
Level offset value
ADJ OK :XX
Displayed when an adjustment value(s) was written to
the data flash. The level offset value (Hex) is displayed.
Failed to save
the adjustment
value
ADJ NG Displayed when adjustment value(s) was not written to
the data flash.
DISP Adjustment mode
switching
Press the key briefly to enter the TUNER setting ad-
justment mode (AUTO).
ATT Adjustment mode
switching
Press the key briefly to enter the TUNER setting ad-
justment mode (AUTO).
RETURN Mode clear Clear the adjustment mode to transfer to the TUNER
special display mode.
S-meter voltage evaluation mode
This mode is to display the S-meter present voltage (Hex) and to check and evaluate if the voltage is within the criteria or not (OK
or NG).
Check and evaluate the voltage only after the completion of the TUNER setting adjustment. (When the setting is not yet ad-
justed, “– –” is displayed.)
When receiving AM, do not select this mode.
When this mode, the BAND switching and SEEK operations such as operation of [BAND], []/[], and [PRESET] keys shall be
prohibited.
Key Description of display Description
S-meter voltage
evaluation display
S-meter Evaluation
value result
S–MTR XX:OK
[S-meter value]
XX: Current S-meter value (Hex)
[S-meter value evaluation result]
OK: S-meter voltage is within the range of the criteria
(J type: 0xA5~0xAF)
(Other than J type: 0xA3-0xAD)
NG: S-meter voltage is outside the range of the crite-
ria (Other than defined above)
– –: TUNER setting is not yet adjusted
RETURN Mode clear Clear the adjustment mode to transfer to the TUNER
special display mode.

18
DPX304/DPX308U/DPX404U
DPX-MP3120/U5120/U5120S
TEST MODE
●Test mode specification with CD source
Operation for CD-DA media (KTD-02A)
Key Description of display Description
Normal display P-TIME display (default)
Truck-up
operation
[] key operation enables the truck jumps in the fol-
lowing sequence.
No.9 →No.15 →No.10 →No.11 →No.12 →No.13
→No.22 →No.14 →No.9 (Return back to top) ….
*However in the case of CD-DA disc that has 8 or
less tracks of recorded music, and MP3/ WMA/ AAC
discs, they are played back in order starting with
Track1.
*When displaying CD mechanism name and the ver-
sion information, returns to normal display.
Truck-down
operation
Tracks down by 1 from the track currently being
played back.
*When displaying CD mechanism name and the ver-
sion information, returns to normal display.
1 Jump operation
Jump to No.28 (For MUSIC line vibration test, Scratch
0.7mm)
*When displaying CD mechanism name and the ver-
sion information, returns to normal display.
2 Jump operation
Jump to the track No.14 (Blurring surface disc TCD-
731RA Tr14)
*When displaying CD mechanism name and the ver-
sion information, returns to normal display.
3
(forward
rotation)
Mechanism
model name
Mechanism
version display
9B#0 : Mechanism model name (MID model: “9B30”/ LOW
model: “9B10”) and mechanism version display
Mechanism servo
version display SERVO: Mechanism servo table version display
(Displayed only in MID model)
Mechanism boot
program version
display
BOOT : Mechanism boot program version display
(Displayed only in MID model)
5 Jump operation
*Toggling action with the track jump of No.9 ↔No.22
*When displaying CD mechanism name and the ver-
sion information, returns to normal display.
6 Jump operation
Jump to the track No.15.
Set volume to 26 (20Hz 0dB DC protection malfunc-
tion FCT check)
*Set VOL setting value based on 13.2V supplied by
Regulated Power Supply.
*When displaying CD mechanism name and the ver-
sion information, returns to normal display.
RETURN Mode clear In the display of mechanism system information,
return to normal display.

19
DPX304/DPX308U/DPX404U
DPX-MP3120/U5120/U5120S
TEST MODE
Procedure in compressed media
Key Description of display Description
File type display
(MP3) MP 3
The file format is displayed just before the file play-
back.
File type display
(WMA) WM A
File type display
(AAC) AAC
●Audio adjustment
The operation specification and adjustment items in the test mode are the same as those in the product specification.
*However, the layer position and setting value in respective adjustment items shall be changed as follows.
Press []/[] key to adjust Bass-Bass Center Level to 3 stepss (-8 ↔0 ↔+8) (Initial value: 0).
Press []/[] key to adjust Middle-Middle Center Level to 3 steps (-8 ↔0 ↔+8) (Initial value: 0).
Press []/[] key to adjust Treble-Treble Center Level to 3 steps (-8 ↔0 ↔+8) (Initial value: 0).
Press []/[] key to adjust Fader to 3 steps (R15 ↔0 ↔F15) (Initial value: 0).
Press []/[] key to adjust Balance to 3 steps (L15 ↔0 ↔R15) (Initial value: 0).
Press []/[] key to adjust Sub Woofer Level to 3 steps (-15 ↔0 ↔+15) (Initial value: 0).
Press []/[] key to adjust Detailed-LPF SW to 2 steps (85kHz ↔Through) (Initial value: Through).
Press []/[] key to adjust Volume Offset (except for the internal AUX) to 2 steps (-8 ↔0) (Initial value: 0).
Press []/[] key to adjust Volume Offset (internal AUX) to 3 steps (-8 ↔0 ↔+8) (Initial value: 0).
●Backup current measurement
Procedure Note
Power on during ACC OFF (Back Up ON) The MUTE terminal is turned OFF not in 15 seconds but in 2 seconds.
(When the terminal is turned OFF, the CD mechanism does not function.)
3. Forced Power ON mode function
●How to transfer to the mode
In the set for E destination, even if security is allowed, Power ON can be maintained for 30 minutes only by resetting while
pressing and holding [ENTER] key and [PRESET-4] key. After 30 minutes have elapsed, the set can be recovered only by reset-
ting it.

20
DPX304/DPX308U/DPX404U
DPX-MP3120/U5120/U5120S
TEST MODE
4. Security code forced deletion function
●How to transfer to the mode (E destination)
When a code is requested, press and hold [SEEK UP] key for 3 seconds while pressing [BAND] key to be transferred to the
mode, ([–][–][–][–]) will be cleared.
●Simple security code forced deletion
Delete (Release) a security code forcibly with the operations below.
• Enter “KCAR” with a remote controller.
Press [5] key of a remote controller 2 times to display “K”, and then press [] key.
Press [2] key of a remote controller 3 times to display “C”, and then press [] key.
Press [2] key of a remote controller 1 time to display “A”, and then press [] key.
Press [7] key of a remote controller 2 times to display “R”, and then press [] key.
• Security is released to be a STANDBY mode.
• When incorrect remote controller code has been entered, it will be the code request mode.
5. DC error detection information display function
●How to transfer to the mode
While pressing and holding [PRESET-3] key and [PRESET-6] key, reset-start to enter the DC error display mode.
The opening display shall be omitted for the easy recognition of the mode transfer.
In the STANDBY source, the present DC error detection status is displayed.
The transfer to this mode shall be possible even if the DC error has been detected.
This mode is cleared by reset. (The last status is not retained)
In this mode, DOP setting is unavailable (Except only for DOP TYPE display).
In the set for E destination, even if security is allowed, Power ON can be maintained only for 30 minutes.