PIONEER DV-2750-S/WYXCN Service Manual

PIONEER DV-2750-S/WYXCN Service Manual
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Service Manual for PIONEER DV-2750-S/WYXCN, downloadable as a PDF file.

We also have owner's manual to this model.

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The manual has 94 pages
File size: 24.81 MB
Available language versions: English
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Sample pages

ORDER NO.

PIONEER CORPORATION 4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, 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 2004

DV-2750-S

RRV2909

DVD PLAYER

DV-2750-S

THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).

Model

Type

Power Requirement

Region No.

Serial No.

Confirm 3rd & 4th

alphabetical letters.

DV-2750-S

WYXCN

AC220-240V

&&TE######$$

DV-2750-S

WVXCN

AC220-240V

&&TE######$$

For details, refer to "Important symbols for good services".

T-ZZE MAR. 2004 printed in Japan

ORDER NO.

PIONEER CORPORATION 4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, 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 2004

DV-2750-S

RRV2909

DVD PLAYER

DV-2750-S

THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).

Model

Type

Power Requirement

Region No.

Serial No.

Confirm 3rd & 4th

alphabetical letters.

DV-2750-S

WYXCN

AC220-240V

&&TE######$$

DV-2750-S

WVXCN

AC220-240V

&&TE######$$

For details, refer to "Important symbols for good services".

T-ZZE MAR. 2004 printed in Japan

DV-2750-S

1234

123

SAFETY INFORMATION

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

trainedto 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 mayvoid the warranty. If you are not qualified to perform the repair of this product properly and

safely, youshould not risk trying to do so and refer the repair to a qualified service technician.

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

FOR DVD : MAXIMUM OUTPUT POWER : 5 mW

WAVELENGTH : 650 nm

FOR CD :

MAXIMUM OUTPUT POWER : 5 mW

WAVELENGTH : 780 nm

Additional Laser Caution

: See page 49.

1. Laser Interlock Mechanism

· Loading switch (S101 on the LOAB Assy) is used for interlock

mechanism of the laser.

When this switch turned ON in SW2 (CLOSE) side (OPEN signal is

0V and CLOSE signal is 3.5V), a laser becomes the status which can

completely oscillation.

Furthermore, the laser completely oscillates in the disc judgment and

disc playback.

When player is power ON state and laser diode is not completely

oscillating, 780nm laser diode is always oscillating by half power.

· Laser diode is driving with Q7 (650nm LD) and Q8 (780nm LD)

on the DVDM Assy.

Therefore, when short-circuit between the emitter and collector of these

transistors or the base voltage is supplied for transistors turn on, the

laser oscillates. (failure mode)

· In the test mode

, there is the mode that the laser oscillates except

for the disc judgment and playback. LD ON mode in the test mode

oscillates with the laser forcibly.

The interlock mechanism mentioned above becomes invalid in this

mode.

2. When the cover is open, close viewing through the objective lens with

the naked eye will cause exposure to the laser beam.

LABEL CHECK

(Printed on the Rear Panel)

DV-2750-S

678

[ Important symbols for good services ]

In this manual, the symbols shown-below indicate that adjustments, settings or cleaning should be made securely.

When you find the procedures bearing any of the symbols, be sure to fulfill them:

2. Adjustments

To keep the original performances of the product, optimum adjustments or specification confirmation is indispensable.

In accordance with the procedures or instructions described in this manual, adjustments should be performed.

3. Cleaning

For optical pickups, tape-deck heads, lenses and mirrors used in projection monitors, and other parts requiring cleaning,

proper cleaning should be performed to restore their performances.

5. Lubricants, glues, and replacement parts

Appropriately applying grease or glue can maintain the product performances. But improper lubrication or applying

glue may lead to failures or troubles in the product. By following the instructions in this manual, be sure to apply the

prescribed grease or glue to proper portions by the appropriate amount.For replacement parts or tools, the prescribed

ones should be used.

4. Shipping mode and shipping screws

To protect the product from damages or failures that may be caused during transit, the shipping mode should be set or

the shipping screws should be installed before shipping out in accordance with this manual, if necessary.

1. Product safety

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.

DV-2750-S

1234

123

CONTENTS

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

1. SPECIFICATIONS ............................................................................................................................................ 5

2. EXPLODED VIEWS AND PARTS LIST ............................................................................................................ 6

2.1 PACKING ................................................................................................................................................... 6

2.2 EXTERIOR SECTION................................................................................................................................ 8

2.3 FRONT PANEL SECTION ....................................................................................................................... 10

2.4 04 LOADER ASSY................................................................................................................................... 12

3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM ..........................................................................................14

3.1 OVERALL BLOCK DIAGRAM.................................................................................................................. 14

3.2 POWER SUPPLY BLOCK DIAGRAM ...................................................................................................... 16

3.3 WAVEFORMS .......................................................................................................................................... 18

3.4 LOAB ASSY and OVERALL WIRING DIAGRAM..................................................................................... 20

3.5 DVDM ASSY 1/4 [RF IC BLOCK]............................................................................................................. 22

3.6 DVDM ASSY 2/4 [DVD IC BLOCK] .......................................................................................................... 24

3.7 DVDM ASSY 3/4 [AUDIO BLOCK]........................................................................................................... 26

3.8 DVDM ASSY 4/4 [VIDEO BLOCK]........................................................................................................... 28

3.9 SCRB ASSY ............................................................................................................................................ 30

3.10 FLKY and IRKY ASSYS......................................................................................................................... 32

3.11 POWER SUPPLY UNIT [VWR1377] ...................................................................................................... 34

4. PCB CONNECTION DIAGRAM ..................................................................................................................... 35

4.1 LOAB ASSY ............................................................................................................................................. 35

4.2 DVDM ASSY ............................................................................................................................................ 36

4.3 FLKY and IRKY ASSYS........................................................................................................................... 40

4.4 POWER SUPPLY UNIT [VWR1377] ........................................................................................................ 42

4.5 SCRB ASSY ............................................................................................................................................ 44

5. PCB PARTS LIST ........................................................................................................................................... 45

6. ADJUSTMENT ............................................................................................................................................... 47

6.1 ADJUSTMENT ITEMS AND LOCATION ................................................................................................. 47

6.2 JIGS AND MEASURING INSTRUMENTS ............................................................................................... 47

6.3 NECESSARY ADJUSTMENT POINTS ................................................................................................... 48

6.4 TEST MODE ............................................................................................................................................ 49

6.5 MECHANISM ADJUSTMENT .................................................................................................................. 50

7. GENERAL INFORMATION ............................................................................................................................. 52

7.1 DIAGNOSIS ............................................................................................................................................. 52

7.1.1 TEST MODE ......................................................................................................................................... 52

7.1.2 DISPLAY SPECIFICATION OF THE TEST MODE ............................................................................... 53

7.1.3 FUNCTIONAL SPECIFICATION OF THE SHORTCUT KEY ................................................................ 54

7.1.4 SPECIFICATION OF MODEL INFORMATION DISPLAY...................................................................... 55

7.1.5 FUNCTIONAL SPECIFICATION OF THE SERVICE MODE................................................................. 56

7.1.6 METHOD FOR DIAGNOSING DEGRADATION OF THE LDS ON THE PICKUP ASSY...................... 57

7.1.7 TROUBLE SHOOTING ......................................................................................................................... 58

7.1.8 ID NUMBER AND ID DATA SETTING................................................................................................... 61

7.1.9 SEQUENCE AFTER POWER ON ........................................................................................................ 64

7.1.10 DISASSEMBLY ................................................................................................................................... 65

7.2 IC ............................................................................................................................................................. 73

7.3 DISC / CONTENT FORMAT PLAYBACK COMPATIBILITY ..................................................................... 89

7.4 CLEANING............................................................................................................................................... 91

8. PANEL FACILITIES ........................................................................................................................................ 92