Service Manuals, User Guides, Schematic Diagrams or docs for : Pioneer Car Audio AVH-175 pioneer_avh_171_170_175dvd_crt5673

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ORDER NO.
CRT5673
AVH-171DVD/XNUC

DVD RDS AV RECEIVER

AVH-171DVD /XNUC
AVH-170DVD/XNUC
AVH-170DVD/XNEW5
AVH-175DVD/XNRC
AVH-175DVD/XNRD
AVH-175DVD/XNRI
AVH-179DVD/XNID
This service manual should be used together with the following manual(s):

Model No. Order No. Mech.Module Remarks

CX-3311 CRT5651 LS2.5 DVD Mech. Module : Circuit Descriptions, Mech. Descriptions, Disassembly,
Diagnosis Flowchart, Each Setting and Adjustment

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 2015
K-ZZZ JAN. 2015 Printed in Japan
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SAFETY INFORMATION

A CAUTION

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.

WARNING

This product may contain a chemical known to the State of California to cause cancer, or birth defects or other reproductive
B harm.
Health & Safety Code Section 25249.6 - Proposition 65

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:

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

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

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

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.
F

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A
Laser diode characteristics
Wave length:
DVD:660 nm to 670 nm
CD:780 nm to 800 nm
Focus lens on Maximum output:
CD:6.26 mW(Emitting period :9 sec.)
DVD:1.27 mW (Emitting period : unlimited)

Additional Laser Caution
B
Transistors Q841 and Q842 in PCB drive the laser diodes for DVD and CD
respectively. When Q841 or Q842 is shorted between their terminals,
the laser diodes for DVD or CD 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.

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

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CONTENTS
SAFETY INFORMATION..................................................................................................................................... 2
1. SERVICE PRECAUTIONS ............................................................................................................................... 5
A
1.1 SERVICE PRECAUTIONS......................................................................................................................... 5
1.2 NOTES ON SOLDERING .......................................................................................................................... 9
2. SPECIFICATIONS ............................................................................................................................................ 9
2.1 SPECIFICATIONS...................................................................................................................................... 9
2.2 DISC/CONTENT FORMAT ........................................................................................................................ 9
3. BASIC ITEMS FOR SERVICE........................................................................................................................ 10
3.1 CHECK POINTS AFTER SERVICING..................................................................................................... 10
3.2 PCB LOCATIONS .................................................................................................................................... 11
3.3 JIGS LIST ................................................................................................................................................ 12
3.4 CLEANING............................................................................................................................................... 12
4. BLOCK DIAGRAM.......................................................................................................................................... 14
4.1 OVERALL CONNECTION DIAGRAM...................................................................................................... 14
B 4.2 BLOCK DIAGRAM ................................................................................................................................... 16
4.3 POWER SUPPLY SYSTEM FIGURE....................................................................................................... 20
5. DIAGNOSIS.................................................................................................................................................... 23
5.1 OPERATIONAL FLOWCHART ................................................................................................................ 23
5.2 INSPECTION METHOD OF PICKUP UNIT............................................................................................. 24
5.3 ERROR CODE LIST ................................................................................................................................ 27
5.4 CONNECTOR FUNCTION DESCRIPTION ............................................................................................. 29
6. SERVICE MODE ............................................................................................................................................ 30
6.1 VERSION INFORMATION ....................................................................................................................... 30
6.2 SERVICE TEST MODE ........................................................................................................................... 31
6.3 FIRMWARE UPGRADE ........................................................................................................................... 43
7. DISASSEMBLY............................................................................................................................................... 46
C
8. EACH SETTING AND ADJUSTMENT ........................................................................................................... 50
8.1 PCL OUTPUT CONFIRMATION .............................................................................................................. 50
9. EXPLODED VIEWS AND PARTS LIST.......................................................................................................... 52
9.1 PACKING ................................................................................................................................................. 52
9.2 EXTERIOR (1) ......................................................................................................................................... 56
9.3 EXTERIOR (2) ......................................................................................................................................... 58
9.4 DVD MECHANISM MODULE (1) ............................................................................................................. 60
9.5 DVD MECHANISM MODULE (2) ............................................................................................................. 62
10. SCHEMATIC DIAGRAM ............................................................................................................................... 64
10.1 MOTHER UNIT (VEHICLE IF) ............................................................................................................... 64
10.2 MOTHER UNIT (USB POW) .................................................................................................................. 66
D 10.3 MOTHER UNIT (I/F)............................................................................................................................... 68
10.4 MOTHER UNIT (E.VOL) ........................................................................................................................ 70
10.5 MOTHER UNIT (DDC (2ch)) .................................................................................................................. 72
10.6 MOTHER UNIT (TUNER) ...................................................................................................................... 74
10.7 MOTHER UNIT (PWIC) ......................................................................................................................... 76
10.8 MOTHER UNIT (ucom) .......................................................................................................................... 78
10.9 MOTHER UNIT (POWER) ..................................................................................................................... 80
10.10 MOTHER UNIT (SOC) (1/2 scale) ....................................................................................................... 82
10.11 MONITOR PCB (PCB I/F).................................................................................................................... 84
10.12 MONITOR PCB (LCD BL).................................................................................................................... 86
10.13 MONITOR PCB (LCD PW) .................................................................................................................. 88
10.14 MONITOR PCB (LCD I/F) .................................................................................................................... 90
E 10.15 MONITOR PCB (TCON) ...................................................................................................................... 92
10.16 MONITOR PCB (ISO) .......................................................................................................................... 94
10.17 RELAY UNIT ........................................................................................................................................ 96
10.18 KEY PCB ............................................................................................................................................. 98
10.19 WAVEFORMS .................................................................................................................................... 100
11. PCB CONNECTION DIAGRAM ................................................................................................................. 102
11.1 MOTHER UNIT .................................................................................................................................... 102
11.2 MONITOR PCB.................................................................................................................................... 106
11.3 RELAY UNIT ........................................................................................................................................ 110
11.4 KEY PCB ............................................................................................................................................. 112
12. ELECTRICAL PARTS LIST ........................................................................................................................ 113
F

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1. SERVICE PRECAUTIONS
1.1 SERVICE PRECAUTIONS
A

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. Be careful in handling ICs. Some ICs such as MOS type are so fragile that they can be damaged by electrostatic
induction.
3. Please be sure to conduct line process to original status if you make assembling after repair.
4. Please be careful of not to imply static charge onto integrated circuits, etc, when you conduct repair work.
Especially, please use soldering iron with its tip grounded.
Also, please use a pair of tweezers with static charge protection capability if there is the possibility of contacting to
device terminals, and avoid the use of metal-made tweezers.
5. Before disassembling the unit, be sure to turn off the power. Unplugging and plugging the connectors during power-on B
mode may damage the ICs inside the unit.
6. To protect the pickup unit from electrostatic discharge during servicing, take an appropriate treatment (shorting-solder)
by referring to "16. Shorting-solder of the DVD Mechanism Module".
7. Please keep the distance of more than 13 cm from focus lens for safety when you check pickup and make adjustment,
and do not look straight at Laser Beam for more than 10 seconds.
8. Please power adjustment when you replaced mechanical area of DVD Mecha Module or DVD core unit.
9. On this mechanism, Pickup and Spindle Motor can not be replaced at the service site, because a special facility is
required for the adjustment after replacing them.
So, if Pickup or Spindle Motor is defective, replace the Mechanism Unit.
10. Please strictly control the electrostatic action when the LD does not have the shorting-solder. Electrostatic action may
destroy the LD.
11. The service unit of the DVD Mechanism Module has been adjusted. You need not adjust it during servicing. C
12. The skew adjustment and LD power adjustment for the DVD Mechanism Module have already finished, so you cannot
replace its Pickup unit or board unit separately.
13. The part listed below is difficult to replace as a discrete component part.
When the part listed in the table is defective, replace whole Assy.

Unit No. Part No. Reason
Mother Unit IC2201 TEF6686HN Heat pad
Monitor PCB IC5101 OZ527ILN Heat pad
IC5201 R1290K103A Heat pad
D

14. EJECT LOCK MODE for DVD mechanism
< Procedure >
To enter EJECT LOCK MODE : Reset start while pressing [VOL+] key and [REVERSE] key.
To exit EJECT LOCK MODE : Follow the same steps to enter this mode.

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A 15. area and a heat sink becomes hot areas. Be careful not to burn yourself.
MOTHER UNIT
IC1301

L902
C1319
IC111

IC741

MOTHER UNIT

IC1201

IC601

IC861

HEAT SINK

1F & 2F Rear Holder

MECHA TOP

AVH-171DVD/XNUC
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16. Shorting-solder of the DVD Mechanism Module A

The shorting-solder protects the laser diode from the static electricity.
When replacing the DVD Mechanism Module, be sure to follow the procedure below.

1. Procedure for removing the DVD Mechanism Module of the product
(1) To protect the LD, short-circuit the solder while the Mechanism Module remains connected to the product.

Check the location for the shorting-solder.

Shorting-solder land
for CD B

Shorting-solder land
for DVD

Confirm that the Mechanism Module
is connected to the product. Short-circuit the solder to be ready to remove
the DVD Mechanism Module. C

(2) After confirming the shorting-solder has been done securely, remove the DVD Mechanism Module of the product.

Confirm the shorting-solder.
E

Remove the flexible flat cable.

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A
2. Procedure for connecting the DVD Mechanism Module to the product
For the Mechanism Module which is provided by the service station, the short-solder has been done to protect the LD.
According to the previous procedure for removing in reverse order, first connect the Mechanism Module to the product,
then remove the shorting-solder.
(1) Connect the DVD Mechanism Module to the product with shorting-solder.

Confirm the shorting-solder.

Connect to the product.

(2) Remove the shorting-solder while the Mechanism Module is connected to the product.

Remove the shorting-solder.

AVH-171DVD/XNUC
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1.2 NOTES ON SOLDERING

For environmental protection, lead-free solder is used on the printed circuit boards mounted in this unit. A
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: B
Parts numbers of lead-free solder:
GYP1006 1.0 in dia.
GYP1007 0.6 in dia.
GYP1008 0.3 in dia.

2. SPECIFICATIONS
2.1 SPECIFICATIONS
For all items except the backup current, refer to the Owner's Manual.
Backup current......................... 5.0 mA or less

2.2 DISC/CONTENT FORMAT

is a trademark of DVD Format/Logo Licensing Corporation.

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3. BASIC ITEMS FOR SERVICE
3.1 CHECK POINTS AFTER SERVICING
A
To keep the product quality after servicing, please confirm following check points.

No. Procedures Item to be confirmed
1 Confirm whether the customer complain has The customer complain must not be
been solved. reappeared.
If the customer complain occurs with the Display, video, audio and operations must be
specific media, use it for the operation check. normal.
2 DVD Measure playback error rates at the Deterioration of mecha-drive can be
innermost and outermost tracks by using the checked.
test mode with the following disc. The error rate must be less than the
DVD test disc (TDV-582) threshold value.
B (Refer to the chapter of DIAGNOSIS for the
threshold value.)
3 DVD Play back a DVD. Display, video, audio and operations must be
(Menu operation; Title/chapter search) normal.
4 CD Play back a CD. Display, audio and operations must be
(Track search) normal.
5 FM/AM tuner Check FM/AM tuner action. Display, audio and operations must be
(Seek, Preset) normal. * If the reception sensitivity is poorer
Switch band to check both FM and AM. than normal, the gasket on the FM/AM tuner
unit may be damaged or lost.
C
6 Check whether no disc is inside the product. The media used for the operating check must
be ejected.
7 Appearance check No scratches or dirt on its appearance after
receiving it for service.

For check items concerning image and voice, please refer to the followings:

Check items concerning image Check items concerning voice
Block-noise Distortion
Crosscut noise Noise
Dot noise Low volume
D Distorted image (Image skip) High volume
Low brightness Changes in level
Too bright Pause of sound
Color fading
Partial discoloration

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3.2 PCB LOCATIONS

A Mother Unit
C Relay Unit
D Key PCB

B Monitor PCB

A:AVH-171DVD/XNUC
B:AVH-170DVD/XNUC
C:AVH-170DVD/XNEW5
D:AVH-175DVD/XNRC
E:AVH-175DVD/XNRD
F:AVH-175DVD/XNRI
C
G:AVH-179DVD/XNID

Unit Name : Mother Unit
Unit Number : CWN8741(A)
Unit Number : CWN8734(B)
Unit Number : CWN8732(C)
Unit Number : CWN8736(D)
Unit Number : CWN8737(E)
Unit Number : CWN8738(F)
Unit Number : CWN8739(G)
D
Monitor Key Unit
Consists of
Monitor PCB
Key PCB

Unit Name : Monitor Key Unit
Unit Number : CWN8753(A,B,D,E,F,G)
Unit Number : CWN8754(C)

Unit Name : Relay Unit
Unit Number : E

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3.3 JIGS LIST
- Jigs List
Name Jig No. Remarks
A Disc(DVD-Video) TDV-582 Skew adjustment, Check points after servicing,
Inspection method of Pickup Unit
Disc(CD-DA) TCD-782 Inspection method of Pickup Unit
30P FFC GGD1222 RELAY UNIT <

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