Pioneer DEH-2350UB Schematic

PIONEER CORPORATION 1-1, Shin-ogura, Saiwai-ku, Kawasaki-shi, Kanagawa 212-0031, Japan

PIONEER ELECTRONICS (USA) INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A.
PIONEER EUROPE NV Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936

PIONEER CORPORATION 2010

CD RDS RECEIVER

ORDER NO.

CRT4632

DEH-2350UB/XNES

DEH-2350UB

/XNES

DEH-2350UBG/XNES
DEH-2350UBSW/XNES
DEH-2350UB/XSES
DEH-2350UB/XNES1

This service manual should be used together with the following manual(s):

Model No. Order No. Mech. Module Remarks

CX-3269 CRT4488 S11.1STD-DOUT CD Mech. Module : Circuit Descriptions, Mech. Descriptions, Disassembly

For details, refer to "Important Check Points for Good Servicing".

K-ZZZ OCT. 2010 Printed in Japan

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SAFETY INFORMATION

Where in a manufacturer’s service documentation, for example in circuit diagrams or lists
of components, a symbol is used to indicate that a specific component shall be replaced only
by the component specified in that documentation for safety reasons, the following symbol shall
be used:

This service manual is intended for qualified service technicians; it is not meant for the casual do-it-yourselfer.
Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely repair
complex products such as those covered by this manual.
Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty.
If you are not qualified to perform the repair of this product properly and safely, you should not risk trying to do so
and refer the repair to a qualified service technician.

CAUTION:

USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE
SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

WARNING!

The AEL (accessible emission level )of the laser power output is less than CLASS 1
but the laser component is capable of emitting radiation exceeding the limit for
CLASS 1.
A specially instructed person should do servicing operation of the apparatus.

Laser diode characteristics

Wave length : 785 nm to 814 nm
Maximum output : 1 190 µW(Emitting period : unlimited)

Additional Laser Caution

Transistors Q101 in PCB drive the laser diodes.
When Q101 is shorted between their terminals, the laser diodes will radiate beam.
If the top cover is removed with no disc loaded while such short-circuit is continued,
the naked eyes may be exposed to the laser beam.

- Safety Precautions for those who Service this Unit.
When checking or adjusting the emitting power of the laser diode exercise caution in order to get safe, reliable
results.

Caution:

1. During repair or tests, minimum distance of 13 cm from the focus lens must be kept.

2. During repair or tests, do not view laser beam for 10 seconds or longer.

CAUTION

This product is a class 1 laser product classi­fied under the Safety of laser products, IEC
60825-1:2007, and contains a class 1M laser
module. To ensure continued safety, do not re­move any covers or attempt to gain access to
the inside of the product. Refer all servicing to
qualified personnel.

CAUTION—CLASS 1M INVISIBLE LASER
RADIATION WHEN OPEN, DO NOT VIEW
DIRECTLY WITH OPTICAL INSTRUMENTS.

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CAUTION

Danger of explosion if battery is incorrectly replaced.
Replaced only with the same or equivalent type recommended by the manufacture.
Discord used batteries according to the manufacture's instructions.

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[Important Check Points for Good Servicing]

In this manual, procedures that must be performed during repairs are marked with the below symbol.
Please be sure to confirm and follow these procedures.

1. Product safety

Please conform to product regulations (such as safety and radiation regulations), and maintain a safe servicing environment by
following the safety instructions described in this manual.

1 Use specified parts for repair.

Use genuine parts. Be sure to use important parts for safety.

2 Do not perform modifications without proper instructions.

Please follow the specified safety methods when modification(addition/change of parts) is required due to interferences such as
radio/TV interference and foreign noise.

3 Make sure the soldering of repaired locations is properly performed.

When you solder while repairing, please be sure that there are no cold solder and other debris.
Soldering should be finished with the proper quantity. (Refer to the example)

4 Make sure the screws are tightly fastened.

Please be sure that all screws are fastened, and that there are no loose screws.

5 Make sure each connectors are correctly inserted.

Please be sure that all connectors are inserted, and that there are no imperfect insertion.

6 Make sure the wiring cables are set to their original state.

Please replace the wiring and cables to the original state after repairs.
In addition, be sure that there are no pinched wires, etc.

7 Make sure screws and soldering scraps do not remain inside the product.

Please check that neither solder debris nor screws remain inside the product.

8 There should be no semi-broken wires, scratches, melting, etc. on the coating of the power cord.

Damaged power cords may lead to fire accidents, so please be sure that there are no damages.
If you find a damaged power cord, please exchange it with a suitable one.

9 There should be no spark traces or similar marks on the power plug.

When spark traces or similar marks are found on the power supply plug, please check the connection and advise on secure
connections and suitable usage. Please exchange the power cord if necessary.

a Safe environment should be secured during servicing.

When you perform repairs, please pay attention to static electricity, furniture, household articles, etc. in order to prevent injuries.
Please pay attention to your surroundings and repair safely.

2. Adjustments

To keep the original performance of the products, optimum adjustments and confirmation of characteristics within specification.
Adjustments should be performed in accordance with the procedures/instructions described in this manual.

4. Cleaning

For parts that require cleaning, such as optical pickups, tape deck heads, lenses and mirrors used in projection monitors, proper
cleaning should be performed to restore their performances.

3. Lubricants, Glues, and Replacement parts

Use grease and adhesives that are equal to the specified substance.
Make sure the proper amount is applied.

5. Shipping mode and Shipping screws

To protect products from damages or failures during transit, the shipping mode should be set or the shipping screws should be
installed before shipment. Please be sure to follow this method especially if it is specified in this manual.

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CONTENTS

SAFETY INFORMATION .....................................................................................................................................2

1. SERVICE PRECAUTIONS................................................................................................................................6

1.1 SERVICE PRECAUTIONS .........................................................................................................................6

1.2 NOTES ON SOLDERING...........................................................................................................................7

2. SPECIFICATIONS.............................................................................................................................................8

2.1 SPECIFICATIONS ......................................................................................................................................8

2.2 DISC/CONTENT FORMAT .........................................................................................................................8

2.3 PANEL FACILITIES.....................................................................................................................................9

2.4 CONNECTION DIAGRAM........................................................................................................................10

3. BASIC ITEMS FOR SERVICE........................................................................................................................11

3.1 CHECK POINTS AFTER SERVICING .....................................................................................................11

3.2 PCB LOCATIONS .....................................................................................................................................12

3.3 JIGS LIST .................................................................................................................................................13

3.4 CLEANING ...............................................................................................................................................13

4. BLOCK DIAGRAM ..........................................................................................................................................14

4.1 BLOCK DIAGRAM....................................................................................................................................14

5. DIAGNOSIS ....................................................................................................................................................16

5.1 OPERATIONAL FLOWCHART.................................................................................................................16

5.2 ERROR CODE LIST.................................................................................................................................17

5.3 CONNECTOR FUNCTION DESCRIPTION .............................................................................................19

6. SERVICE MODE.............................................................................................................................................20

6.1 DISPLAY TEST MODE .............................................................................................................................20

6.2 CD TEST MODE.......................................................................................................................................21

7. DISASSEMBLY ...............................................................................................................................................22

8. EACH SETTING AND ADJUSTMENT............................................................................................................28

8.1 CD ADJUSTMENT ...................................................................................................................................28

8.2 CHECKING THE GRATING AFTER CHANGING THE PICKUP UNIT ....................................................29

8.3 PCL OUTPUT CONFIRMATION...............................................................................................................31

9. EXPLODED VIEWS AND PARTS LIST ..........................................................................................................32

9.1 PACKING ..................................................................................................................................................32

9.2 EXTERIOR ...............................................................................................................................................34

9.3 CD MECHANISM MODULE .....................................................................................................................36

10. SCHEMATIC DIAGRAM................................................................................................................................38

10.1 TUNER AMP UNIT (GUIDE PAGE)........................................................................................................38

10.2 KEYBOARD UNIT ..................................................................................................................................44

10.3 CD CORE UNIT (S11.1STD-DOUT) ......................................................................................................46

10.4 WAVEFORMS.........................................................................................................................................48

11. PCB CONNECTION DIAGRAM....................................................................................................................50

11.1 TUNER AMP UNIT .................................................................................................................................50

11.2 KEYBOARD UNIT ..................................................................................................................................54

11.3 CD CORE UNIT (S11.1STD-DOUT) ......................................................................................................56

12. ELECTRICAL PARTS LIST ...........................................................................................................................58

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1. SERVICE PRECAUTIONS

1. You should conform to the regulations governing the product (safety, radio and noise, and other
regulations), and should keep the safety during servicing by following the safety instructions
described in this manual.

2. Before disassembling the unit, be sure to turn off the power. Unplugging and plugging the connectors
during power-on mode may damage the ICs inside the unit.

3. To protect the pickup unit from electrostatic discharge during servicing, take an appropriate treatment
(shorting-solder) by referring to "the DISASSEMBLY".

4. After replacing the pickup unit, be sure to check the grating.

5. Be careful in handling ICs. Some ICs such as MOS type are so fragile that they can be damaged by
electrostatic induction.

6. area and a heat sink becomes hot areas. Be careful not to burn yourself.

7. Software update
The software of this product is stored in IC671.
Please replace IC671 when making the version upgrade of software.

8. How to Handle Infrared Deteching unit for Remote Control of Grille
The infrared deteching unit for remote control of keyboard unit is not fixed with cushion, etc.
When external force is applied on the infrared deteching unit for remote control, the light receiving sensitivity might be
deteriorated since the lead bents and attaching angle of the light receiving part may be varied.
Please do not apply external force onto the infrared deteching unit for remote control. If any external force is applied by
mistake, please confirm whether lead bending may exist or not.
If the lead is bent, please correct the angle between the lead and the light receiving part to be 90 degrees or replace
the infrared deteching unit for remote control (GP1UXC14RK).

1.1 SERVICE PRECAUTIONS

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9. Capacitor Bond Lock
Silicon Glue (GEM1017)
Place the capacitor in the center of the silk print, and confirm it does not touch to the connector. Then, apply silicon glue.

OK

NG

For environmental protection, lead-free solder is used on the printed circuit boards mounted in this unit.
Be sure to use lead-free solder and a soldering iron that can meet specifications for use with lead-free solders for repairs
accompanied by reworking of soldering.

Compared with conventional eutectic solders, lead-free solders have higher melting points, by approximately 40 C.
Therefore, for lead-free soldering, the tip temperature of a soldering iron must be set to around 373 C in general, although
the temperature depends on the heat capacity of the PC board on which reworking is required and the weight of the tip of
the soldering iron.

Compared with eutectic solders, lead-free solders have higher bond strengths but slower wetting times and higher melting
temperatures (hard to melt/easy to harden).

The following lead-free solders are available as service parts:
Parts numbers of lead-free solder:
GYP1006 1.0 in dia.
GYP1007 0.6 in dia.
GYP1008 0.3 in dia.

1.2 NOTES ON SOLDERING

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2. SPECIFICATIONS

General

Rated power source...............1 4.4 V DC

(allowable voltage range:

12.0 V to 14.4 V DC)

Grounding system...................Negative type

Maximum current consumption

.....................................................10 .0 A

Backup current .......................4.0 mA or less

Dimensions (W × H × D):

DIN

Chassis.....................17 8 m m × 50 mm × 165

mm

Nose...........................188 mm × 5 8 mm × 1 7 mm

D

Chassis.....................17 8 m m × 50 mm × 165

mm

Nose...........................170 mm × 4 6 mm × 1 7 mm

Weight ..........................................1. 2 kg

Audio

Maximum power output ....... 50 W × 4

Continuous power output ...22 W × 4 (50 Hz to 15 000

Hz, 5 % THD, 4 load, both

channels driven)

Load impedance ......................4 (4 to 8 allowable)

Preout maximum output level

.....................................................2.0 V

Tone controls:

Bass

Frequency................10 0 Hz

Gain ............................±12 dB

Mid

Frequency................1 kHz

Gain ............................±12 dB

Treble

Frequency................10 kHz

Gain ............................±12 dB

Subwoofer (mono):

Frequency..........................50/63/80/100/125 Hz

Slope....................................–18 dB/oct

Gain ......................................+6 dB to – 24 dB

Phase ..................................N orm al/Reverse

CD player

System ..........................................Compact disc audio system

Usable discs ..............................Compact disc

Signal-to-noise ratio............... 94 d B (1 kHz) (IEC-A net-

work)

Number of channels ..............2 (st ereo)

WMA decoding format .........Ver. 7 , 7.1, 8, 9, 10, 11, 12

(2ch audio)

(Windows Media Player)

MP3 decoding format ...........M PEG -1 & 2 Au dio Layer 3

WAV signal format..................Linear PCM & MS ADPCM

(Non-compressed)

USB

USB standard specification

.....................................................USB 2.0 full speed

Maximum current supply ....500 mA

USB Class...................................MSC (Mass Storage Class)

File system..................................FAT12, FAT16, FAT32

WMA decoding format .........Ver. 7 , 7.1, 8, 9, 10, 11, 12

(2ch audio)

(Windows Media Player)

MP3 decoding format ...........MPEG-1 & 2 Audio Layer 3

WAV signal format..................Linear PCM & MS ADPCM

(Non-compressed)

FM tuner

Frequency range......................87.5 MH z t o 108.0 MHz

Usable sensitivity.....................9 dBf (0. 8 µV/75 , mono,

S/N: 30 dB)

Signal-to-noise ratio............... 72 d B (IE C- A network)

AM tuner

Frequency range......................531 kHz to 1 602 kHz (9 kHz)

530 kHz to 1640 kHz (10

kHz)

Usable sensitivity.....................25 µV (S/N: 20 dB)

Signal-to-noise ratio............... 62 d B (IE C- A network)

SW tuner (DEH-2350UBSW)

Frequency range......................2 3 00 kHz to 7 7 35 k Hz

(2 300 kHz to 2 495 kHz, 2

940 kHz to 4 215 kHz, 4 540

kHz to 5 175 kHz, 5 820 kHz

to 6 455 kHz, 7 100 kHz to 7

735 kHz)

9 500 kHz to 21 975 kHz

(9 500 kHz to 10 135 kHz, 11

580 kHz to 12 215 kHz, 13

570 kHz to 13 870 kHz, 15

100 kHz to 15 735 kHz, 17

500 kHz to 17 985 kHz, 18

015 kHz to 18 135 kHz, 21

340 kHz to 21 975 kHz)

Usable sensitivity.....................28 µV (S/N: 20 dB)

Signal-to-noise ratio............... 62 d B (IE C- A network)

Infrared remote control

Wavelength.................................940 nm ±5 0 nm

Output ...........................................typ ; 12 mw/ sr per Infrared

LED

Note

Specifications and the design are subject to mod­ifications without notice.

2.1 SPECIFICATIONS

2.2 DISC/CONTENT FORMAT

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Head unit

1

24 5 63

78 a b cd9

traPtraP

1 S (SRC/OFF) 8

(Back/display/

scroll)

2 (eject) 9

3 (list) a /DISP OFF

4

MULTI-CONTROL
(M.C.)

b 1 to 6

5 Disc loading slot c

AUX input jack (3.5
mm stereo jack)

6 USB port d Detach button

7 B (BAND/ESC)

CAUTION

Use an optional Pioneer USB cable (CD-U50E)
to connect the USB audio player/USB mem­ory as any device connected directly to the
unit will protrude out from the unit and may
be dangerous.
Do not use unauthorized products.

Remote control

e

k

i

f

h

gj

7

1

9

Part Operation

e VOLUME

Press to increase or decrease vo­lume.

f MUTE

Press to mute. Press again to un­mute.

g AUDIO Press to select an audio function.

h DISP/SCRL

Press to select different displays.
Press and hold to scroll through
the text information.

i

Press to pause or resume play­back.

j FUNCTION

Press to select functions.
Press and hold to recall the initial
setting menu when the sources
are off.

k

LIST/
ENTER

Press to display the disc title,
track title, folder, or file list de­pending on the source.
While in the operating menu,
press to control functions.

Display indication

4 5

6

3

8

a b

9

1

2

7

Indicator State

1

Main dis­play sec­tion

Tuner: band and frequency
Program service name
Built-in CD player and USB:
elapsed playback time and
text information

2

An upper tier of folder or menu
exists.

3

A lower tier of folder or menu ex­ists.

4

(list) The list function is operated.

5

(artist)

The disc (track) artist name is dis­played.

6

(disc)

The disc (album) name is dis­played.

7

(song)

The track (song) name is dis­played.
A playable audio file has been se­lected while operating the list.

8 LOC The local seek tuning is on.

9

(repeat) Track or folder repeat is on.

a

(ran-

dom)

Random play is on.

b

(sound re­triever)

The sound retriever function is
on.

2.3 PANEL FACILITIES

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2.4 CONNECTION DIAGRAM

This unit

1

3

4 5

2

1 Power cord input
2 Rear output or subwoofer output
3 Antenna input
4 Fuse (10 A)
5 Wired remote input

Hard-wired remote control adaptor can be
connected (sold separately).

Power cord

Perform these connections when not connect­ing a rear speaker lead to a subwoofer.

1

8
9

c
d

6

32

4

5

7

a

b

e
f

h

g

RL

F

R

Perform these connections when using a sub­woofer without the optional amplifier.

1

8
9

c
d

6

32

4

7

a
b

a

b

e
f

h

g

RL

F

SW

i

j

d

c

kl

1 To power cord input
2 Left
3 Right
4 Front speaker

5 Rear speaker
6 White
7 White/black
8 Gray
9 Gray/black
a Green
b Green/black
c Violet
d Violet/black
e Black (chassis ground)

Connect to a clean, paint-free metal location.

f Yellow

Connect to the constant 12 V supply terminal.

g Red

Connect to terminal controlled by ignition
switch (12 V DC).

h Blue/white

Connect to system control terminal of the
power amp or auto-antenna relay control
terminal (max. 300 mA 12 V DC).

i Subwoofer (4 )
j When using a subwoofer of 70 W (2 ), be

sure to connect the subwoofer to the violet
and violet/black leads of this unit. Do not con­nect anything to the green and green/black
leads.

k Not used.
l Subwoofer (4 )× 2

Notes

With a 2 speaker system, do not connect any­thing to the speaker leads that are not con­nected to speakers.
Change the initial setting of this unit. Refer to
SW CONTROL (rear output and subwoofer set­ting).
The subwoofer output of this unit is monaural.

Power amp (sold separately)

Perform these connections when using the
optional amplifier.

1

3

2

4

55

1 System remote control

Connect to Blue/white cable.

2 Power amp (sold separately)
3 Connect with RCA cable (sold separately)
4 To Rear output or subwoofer output
5 Rear speaker or subwoofer

Fastening the front panel

If you do not plan to detach the front panel,
the front panel can be fastened with the supplied
screw.

Screw
ES, ES1 : XXX7020

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demrifnocebotmetIserudecorP.oN

1 Confirm whether the customer complain has

been solved.
If the customer complain occurs with the
specific media, use it for the operation check.

The customer complain must not be
reappeared.
Display, audio and operations must be
normal.

2 CD Play back a CD.

(Track search)

No malfunction on display, audio and
operation.

3 FM/AM tuner Check FM/AM tuner action.

(Seek, Preset)
Switch band to check both FM and AM.

Display, audio and operations must be
normal.

4 Check whether no disc is inside the product. The media used for the operating check must

be ejected.

retfaecnaraeppastinotridrosehctarcsoNkcehcecnaraeppA5

receiving it for service.

Item to be checked regarding audio

3. BASIC ITEMS FOR SERVICE

3.1 CHECK POINTS AFTER SERVICING

To keep the product quality after servicing, please confirm following check points.

See the table below for the items to be checked regarding audio:

Distortion
Noise

Volume too low
Volume too high
Volume fluctuating
Sound interrupted

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3.2 PCB LOCATIONS

A

B

Keyboard Unit

CD Core Unit (S11.1STD-DOUT)

C

Tuner Amp Unit

A:DEH-2350UB/XNES

B:DEH-2350UBG/XNES

C:DEH-2350UBSW/XNES

D:DEH-2350UB/XSES

E:DEH-2350UB/XNES1

Unit Number : CWN5489 (A, B, D, E)

: CWN5479 (C)

Unit Name : Tuner Amp Unit

Unit Number :

Unit Name : Keyboard Unit

Unit Number : CWX3985

Unit Name : CD Core Unit (S11.1STD-DOUT)

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- Jigs List

- Grease List

Name

Grease
Grease
Grease
Grease
Silicon Glue

Grease No.

GEM1024
GEM1038
GEM1043
GEM1045
GEM1017

Remarks

CD Mechanism Module
CD Mechanism Module
CD Mechanism Module
CD Mechanism Module
Capacitor Bond Lock

Name

G

Name

16P FFC
Test Disc
L.P.F.

Jig No.

GGD1310
TCD-782

Remarks

Tuner Amp Unit - CD Core Unit
Checking the grating
Checking the grating (Two pieces)

Before shipping out the product, be sure to clean the
following portions by using the prescribed cleaning
tools:

Portions to be cleaned Cleaning tools

CD pickup lenses Cleaning liquid : GEM1004

Cleaning paper : GED-008

3.3 JIGS LIST

3.4 CLEANING

rease No.

emarks

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4. BLOCK DIAGRAM

JA401

1

2,3

CN701

B.UP

Q873

ANTENNA

ILM+B

ILMPW

132

VDD3.3V

8

SWVDD

SW5V

9

6

BSENS

SYSPW

SWVDD

1

11

141

128

7

3

CDRST

9

RESET

120

2

B.UP

4

10

SYS+B

SWVDD

VDD12

SW5V

SYS+B

BSENS

SW5VCNT

+B

PVIN

VIN

SW

VIN

EN

OC

+BUP

VDDCONT

SYSPW

5

USB5V

VOUT

5

SYNC

USBCTL

USBFLG

19

5

2

8

1

18

VBUS

54

1

3

20

4

B.UP

Q751

15

16

Q752

VDCONT

14

VDSENS

67

MECHA VD

VD

B.UP

VDD

BD9008F

IC502

SYNC

EN/

BD2226G

IC501

SYST

CO

R5S72

REGULATOR IC

IC912

BA49182-V12

RF FRONT END IC

IC401

TDA7706

5

FMMIXIN1

16

PINDIN

JA961

Q872

SYSTEM MICRO

COMPUTER

(1/2)

IC601

R5S7266ZD144FP

VDD1.2V

VDD3.3V

VDD

8

7

TUNSDA

TUNSCL

33

34

57

111

112

TUNPCE1

31

107

KEYAD

69

KEYD

129

I2CSDA

RSTN

I2CSCL

DACOUTL

RES

138

RESET

IC651

S-80827CNMC-B8M

14

13

MC

LRCK

MD

BCK

1

DAC

IC231

PCM1753DBQ

2

DATA

SCK

3

16

ML

DACBSCK

DACLRCK

DACBDATA

DACSCK

DACDATA

AUDIO_XOUT

DACCS

15

85

87

91

88

89

84

124

7

VOUTL

FLASH ROM

IC671

PEA011A8

CD CORE UNIT(S11.1 STD-DOUT)

M

LD

MD

SPINDLE

M

LOADING/CARRIAGE

LD-

MD

15

5

HOLOGRAM

RF AMP, CD DECODER, MP3&WMA DECODER

2

VD

VD

9

16

VO3-

15

VO3+

18

VO4-

17

VO4+

21

CNT

9

MUTE

TD,FD

AC,BD,E,F

SD,MD

LD+

14

1

LD

2

PD

CONT

CLCONT

HOME

35

40

39

VDD

1

VDD

VDD

15

5

FOCUS ACT.

TRACKING ACT.

FOP

TOP

2

1

TOP

FOP

11

VO1-

14

VO2+

2

1

14

DSCSNS

38

29

RESET

8

RESET

88

VREF

REFO

93

REFOUT

3

3

FOM

FOM

12

VO1+

4

4

TOM

TOM

13

VO2-

22

LDIN

LOEJ

41

54

PUEN

V+3A

VDD

UNIT

MOTOR

MOTOR

ACTUATOR/

MOTOR DRIVER

BA5839FP

HOMEDSCSNS

PE5756A

DIGITAL SERVO/DATA • PROCESSOR

CPU, USB HOST CONTROLLER

CN701

Q101

CN101

Q102

IC301

S901

S903

IC201

V+3A

12

12

VCC

PD

REFO

LD+

SOP

SOM

LCOP

LCOM

PICKUP UNIT
(P10.5)(SERVICE)

GND

CD DATA (CDSRQ,CDSTBY,SKIP,
SCL,SDA,DATA,BCLK,LRCK,WAIT)

CD DATA (CDSRQ,CDSTBY,SKIP,
SCL,SDA,DATA,BCLK,LRCK,WAIT)

TUNER AMP UNIT

2

3

1

USB5V REGULATOR

WIRED

REMOTE

KEYAD

KEYD

GND

C

A

18

LNAIN

ILMPW

4.1 BLOCK DIAGRAM

14

DEH-2350UB/XNES

5 678

56

7

8

C

D

F

A

B

E

B.UP

21

MUTE

143

ASENS

9

7

3

5

FL-

FL+

RL-

RL+

FL-

FL+

B.UP

RL-

RL+

BREM

ACC

22

Q931

MUTE

CN801

ASENS

13

7

5

1

3

18

17

15

JA901

18

10

8

SOURCE

DPDT

KYDT

SSENS

142

ROT0

131

ROT1

130

DPDT

28

KYDT

29

FLIn

11

20

DSENS

DSENS

140

DM

52

DP

53

RLIn

12

MUTE

25

B.REM

14

BSENS

SYSPW

SWVDD

141

128

7

CDRST

120

3

1

B.UP

5

AUX L

19

SYNC

USBCTL

USBFLG

19

5

18

VBUS

54

20

VDCONT

14

VDSENS

67

02

EN/

SYSTEM MICRO

COMPUTER

(2/2)

IC601

R5S7266ZD144FP

AMP

IC301

PAL007E

Q351

(1/2)

Q351

(2/2)

JA251

Q251

IN2_L

IN1_L

2

1

7

FRONT_L

8

REAR_L

6

POUT_L

ELECTRONIC VOLUME/

SOURCE SELECTOR

IC201

PML022A

IN4+_L

4

CLK

STB

14

15

DATA

VCK

VST

VDT

13

30

26

31

P251

11

USB5V

4

6

ROT0

ROT1

DM

DP

13

15

42

IC801

TC7SET08FUS1

ILM+B

3

SWVDD

SW5V

TUNL

CD_Lch

AUX_Lch

PRE OUT

POWER
CONNECTOR

PL

RCAG

CN1901

KEYBOARD UNIT

B

AUXL

AUXGND

SOURCE

2

1

3

4

FRONT_AUX

KYDT

DPDT

CN1821

10

8

KEY MATRIX

S1845

4

6

2

1

5

4

3

AUXL

SOURCE

ROT0

ROT1

KDT2

KST1

18

19

AUXR

ILM+B

LCD DRIVER/

KEY CONTROLLER

ROTARY COMMANDER

IC1801

PD6340A

LCD

V1801

USB5V

DM

DP

18

20

DPDT

KYDT

17

REM

28

KST4

11

KST3

12

KST2_1

13

KST1

14

KST0

26

KDT3

25

KST2_2

16

KDT1

15

KDT0

11

13

15

5

SW5V

3

D1868,D1869,D1870,D1871,

D1872,D1873,D1874,D1875,

D1876,D1877,D1878,D1879,

D1880,D1881,D1882,D1883

CN1911

2

3

4

USB5V

DM

DP

USB

DSENS

20

S1841

D1913

IC1802

GP1UXC14RK

SENSOR

1

REMOTE CONTROL

FUSE 10 A

DEH-2350UB/XNES

15

1234

1234

C

D

F

A

B

E

5. DIAGNOSIS

Vcc = 1.2 V

Pin 5

PVcc = 3.3 V

Pin 1

BSENS

Pin 141

ASENS

Pin 143

DSENS

Pin 140

BSENS = L

DSENS = L

Starts

communication

with Grille

microcomputer.

SWVDD <- H

Pin 128

Source keys

operative

Source ON

SYSPW <- H

Pin 7

300 ms

300 ms

In case of the above signal, the communication
with Grille microcomputer may fail.
If the time interval is not 300 msec, the oscillator
may be defective.

Completes power-on operation.
(After that, proceed to each source operation)

Power ON

ASENS = L

5.1 OPERATIONAL FLOWCHART

16

DEH-2350UB/XNES

5 678

56

7

8

C

D

F

A

B

E

8-digit display 6-digit display 4-digit display

ERROR-xx ERR-xx E-xx

(2) LIST OF CD ERROR CODES (Error Mode: 0xFD)

Code Classification

Error code to be displayed

Details and possible causes

10 Servo Carriage Home NG The CRG cannot move toward the inner track.

The CRG cannot move from the inner track.

--> Defective HOME SW; Failure in CRG movement.

7

Servo TOC reading NG TOC information cannot be read.

--> The partial disk or TOC content is illegal.

11

Servo Focus Search NG Focusing not available

--> Disc placed upside-down; Stains on the disc; excessive vibration.

17 Servo Setup NG AGC protection does not work. Focus can be easily lost.

--> Scratches or stains on the disc; excessive vibration.

15 Servo Failure in RF data RF not read

--> A CD-R disc that does not contain data loaded

--> A CD-RW disc that does not contain data loaded

12

Servo Spindle Lock NG

Subcode NG
RF-amp NG

Spindle not locked. Subcode not readable.
Proper RF AMP gain not obtained.

--> Defective spindle; Scratches or stains on the disc; excessive vibration.

-->

A CD-R disc that does not contain data loaded, or in a rare case, disc placed upside-down.

--> CD signal error.

30

Servo Search Time Out Failed to reach a target address

--> CRG tracking error; Scratches on the disc; Stains on the disc

50 Mechanism Failure in ejection

Load NG

Disc ejection not completed
Disc loading not completed

--> A foreign object inserted in the mechanism; Disc jammed.

51

Mechanism Failure in retried

turning for ejection

Disc could not be ejected even after disc turning had been retried.

--> A foreign object inserted in the mechanism; Disc jammed.

NOTES

• Indications of error codes are available only during disc operations, because CD operations are
unavailable if a mechanical error is generated.

• If the TOC cannot be read, this is not processed as an error, and operation continues accordingly.

• If you design a new head unit, be sure to use one of the display formats indicated in “Display example of
the main unit.”

ERROR CODES

(1) DISPLAY METHOD

If “0xFD” error mode is displayed in CD MODE (CD MODE area for display), an error code will be displayed in the MIN (minute
display) and SEC (second display) areas.

The same code is displayed in the MIN and SEC areas.
The TNO area is blank (#0FFH), as it conventionally was.

• Display example of the main unit
Depending on the display capability of LCDs, the display format varies, as shown below. XX denotes an error number.
Note: In a case of an OEM product, the error display format is subject to the specifications used by the equipment
manufacturer.

If a CD memory device is inoperable, or operation of such media is stopped by an error, the error mode is established and a
cause of the error is displayed by an error code. Indication of error codes is intended to reduce the number of calls from
customers and facilitate failure analysis and repair work in servicing.

• The 2 high-order digits of an error code denote the main
classification, shown below.
0x: Servo-related errors
1x: Servo-related errors
3x: Servo-related errors
5x: Mechanism-related errors

• How to restore from each error is shown below.
0x, 1x and 3x: ACC-OFF then ON, CD-OFF then ON,
Disc ejection
5X: ACC-OFF then ON, Disc ejection, Disc reloading

5.2 ERROR CODE LIST

DEH-2350UB/XNES

17

1234

1234

C

D

F

A

B

E

USB storage device

Message Cause Action

NO DEVICE When plug and

play is off, no
USB storage de­vice is con­nected.

Turn the plug

and play on.

Connect a com­patible USB sto­rage device.

FRMT READ Sometimes there

is a delay be­tween the start of
playback and
when you start to
hear any sound.

Wait until the mes­sage disappears
and you hear
sound.

NO AUDIO There are no

songs.

Transfer the audio
files to the USB
storage device and
connect.

The connected
USB storage de­vice has security
enabled

Follow the USB
storage device in­structions to dis­able the security.

SKIPPED The connected

USB storage de­vice contains
WMA files em­bedded with
Windows Med­ia DRM 9/10

Play an audio file
not embedded with
Windows Media
DRM 9/10.

PROTECT All the files in the

USB storage de­vice are em­bedded with
Windows Media
DRM 9/10

Transfer audio files
not embedded with
Windows Media
DRM 9/10 to the
USB storage de­vice and connect.

N/A USB The USB device

connected to is
not supported by
this unit.

Connect a USB
portable audio
player or USB
memory that is
USB Mass Storage
Class compliant.

Disconnect your
device and replace
it with a compati­ble USB storage
device.

CHECK USB The USB connec-

tor or USB cable
has short­circuited.

Check that the
USB connector or
USB cable is not
caught in some­thing or damaged.

The connected
USB portable
audio player/
USB memory
consumes more
than maximum
allowable cur­rent.

Disconnect the
USB portable
audio player/USB
memory and do
not use it. Turn the
ignition switch to
OFF, then to ACC
or ON and then
connect a compli­ant USB portable
audio player/USB
memory.

Message Cause Action

ERROR-19 Communication

failed.

Perform one of the
following opera­tions.
–Turn the ignition
switch OFF and
back ON.
–Disconnect the
USB portable
audio player/USB
memory.
–Change to a dif­ferent source.
Then, return to the
USB portable
audio player/USB
memory.

ERROR-23 USB storage de-

vice is not for­matted with
FAT12, FAT16 or
FAT32

USB storage de­vice should be for­matted with FAT12,
FAT16 or FAT32.

18

DEH-2350UB/XNES

5 678

56

7

8

C

D

F

A

B

E

REAR

OUTPUT

ANTENNA

1 FL+
2 FR+
3 FL­4 FR­5 RL+
6 RR+
7 RL­8 RR-

9 NC
10 NC
11 NC
12 NC
13 ACC
14 B.REM
15 B.UP
16 GND

16

14

12

10 8

6

42

15

13

11

97

5

31

WIRED

REMOTE

CONTROL

5.3 CONNECTOR FUNCTION DESCRIPTION

DEH-2350UB/XNES

19