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Yamaha
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DVDS-796
User Manual [ru]
33 pgs1.86 Mb0
User Manual [ja]
44 pgs1.1 Mb0
Service manual
82 pgs14.62 Mb0
User Manual
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Yamaha DVDS-796 Service manual

DVD-S796/DV-S5270 DVD-S796/S5270
DVD PLAYER

DVD-S796/DV-S5270

SERVICE MANUAL
SERV ICE M A N UAL
100711
IMPORTANT NOTICE
WARNING: Failure to follow appropriate service and safety procedures when servicing this product may result in personal
IMPORTANT: The presentation or sale of this manual to any individual or firm does not constitute authorization, certification or
The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering, and service departments of YAMAHA are continually striving to improve YAMAHA products. Modifications are, therefore, inevitable and specifications are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please contact the distributor's Service Division.
WARNING: Static discharges can destroy expensive components. Discharge any static electricity your body may have accumu- IMPORTANT: Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power to the unit.
injury, destruction of expensive components and failure of the product to perform as specified. For these reasons, we advise all YAMAHA product owners that all service required should be performed by an authorized YAMAHA Retailer or the appointed service representative.
recognition of any applicable technical capabilities, or establish a principle-agent relationship of any form.
lated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to this buss).

CONTENTS

SECTION 1
DVD-S796/DV-S5270
SPECIFICATIONS ................................................................ 1-1
LOCALE MANAGEMENT INFORMATION ......................... 1-1
TO SERVICE PERSONNEL ................................................ 1-2
PREVENTION OF ESD TO ES DEVICES.........................1-3
PRECAUTION OF LASER DIODE......................................1-4
HANDILNG PRECAUTIONS FOR TRAVERSE DECK......1-4
REAR PANELS ..................................................................... 1-5
OPTICAL PICKUP SELF-DIAGNOSIS AND REPLACEMENT PROCEDURE ...
SELF-DIAGNOSIS FUNCTION AND SERVICE MODES ............
SERVICE PRECAUTIONS ................................................... 1-9
SERVICE TOOLS AND EQUIPMENT ................................ 1-9
OPERATING INSTRUCTIONS ..........................................1-10
SECTION 2
ASSEMBLING AND DISASSEMBLING THE CASING AND CHECKING C. B. A.s
1.Disassembly Procedure .................................................2-1
2.Casing Parts and C.B.A. Positions .............................. 2-2
3.Service Positions ............................................................ 2-2
4.Disassembling the Top Cover ....................................... 2-3
5.Disassembling the Tray ................................................. 2-3
6.Disassembling the Front Panel ..................................... 2-3
7.Disassembling the Loading Base Unit .........................2-4
8.Checking the Module C.B.A. ......................................... 2-4
9.Disassembling the Rear Panel ..................................... 2-4
10.Checking the Power Supply C.B.A............................... 2-5
11.Checking the Mother C.B.A. ......................................... 2-5
12 Checking the Power Switch C.B.A. .............................. 2-5
13.Checking the Front Switch C.B.A. ................................ 2-5
ASSEMBLING AND DISASSEMBLING THE OPTICAL PICKUP
1.Handling the Optical Pickup .......................................... 2-6
2.Disassembly Procedure .................................................2-6
3.Lubricating the Loading Base Unit ............................... 2-7
4.Static Electricity Countermeasures ............................... 2-8
5.Disassembling the Clamp Base Unit ............................ 2-9
6.Disassembling the Clamper Weight, Clamper Yoke,
Magnet and Clamper .....................................................2-9
7.Disassembling the Traverse Unit .................................. 2-9
8.Disassembling the Stepping Motor Unit ..................... 2-10
9.Disassembling the Optical Pickup Unit ...................... 2-10
10.Disassembling the Nut Unit......................................... 2-11
11.Disassembling the Sub-Shaft Preload Spring ........... 2-11
12.Assembling the Optical Pickup ...................................2-11
13.Disassembling the Spindle Motor Unit ....................... 2-12
14.Optical Pickup Tilt Adjustment .................................... 2-13
15.Disassembling the Intermediate Chassis ...................2-15
16.Disassembling the Vertical Cam and Drive Gear ..... 2-15
17.
Disassembling the Pulley Gear and Deceleration Gear ....
18.Disassembling the Mechanism Loading C.B.A. ......... 2-15
19.
Lubricating the Optical Pickup and Peripheral parts .....
ELECTRICAL CONFIRMATION
1.Video Output (Luminance Signal) Confirmation ........2-17
2.Video Output (Chrominance Signal) Confirmation ....2-17
3.
Video Component Signal (CB) Output Confirmation .
1-6 1-7
2-15
2-16
2-18
SECTION 3
ABBREVIATIONS ................................................................. 3-1
BLOCK DIAGRAM
1.OVERALL BLOCK DIAGRAM ....................................... 3-3
2.SERVO BLOCK DIAGRAM ...........................................3-4
3.VIDEO BLOCK DIAGRAM (FOR U, A, R MODELS) .3-5
4.VIDEO BLOCK DIAGRAM (FOR G, B MODEL) ......... 3-6
5.AUDIO BLOCK DIAGRAM ............................................ 3-7
INTERCONNECTION DIAGRAM
1.U, A, R MODELS ........................................................... 3-8
2.G, B MODELS ................................................................ 3-9
SCHEMATIC DIAGRAM
1.POWER SUPPLY SCHEMATIC DIAGRAM (FOR U MODEL) ......
2.
POWER SUPPLY SCHEMATIC DIAGRAM (FOR G, B, A MODELS) .....
3.POWER SUPPLY SCHEMATIC DIAGRAM (FOR R MODEL) ......
4.
ADSC (MODULE C.B.A. 1/6) SCHEMATIC DIAGRAM .....
5.AV DECODER (MODULE C.B.A. 2/6)
SCHEMATIC DIAGRAM (FOR U MODEL) .....................................
6.AV DECODER (MODULE C.B.A 2/6)
SCHEMATIC DIAGRAM (FOR G, B, A, R MODELS) ..........
7.
AUDIO (MODULE C.B.A. 3/6) SCHEMATIC DIAGRAM
8.
FEP (MODULE C.B.A. 4/6) SCHEMATIC DIAGRAM ....
9.
CPU (MODULE C.B.A. 5/6) SCHEMATIC DIAGRAM ........
10.
ODC (MODULE C.B.A. 6/6) SCHEMATIC DIAGRAM...
11.VIDEO OUT (MOTHER C.B.A. 1/4) SCHEMATIC DIAGRAM (FOR U, A, R MODELS) ... 3-20
12.VIDEO OUT (MOTHER C.B.A 1/4)
SCHEMATIC DIAGRAM (FOR G, B MODELS) ........ 3-21
13.AUDIO OUT1 (MOTHER C.B.A. 2/4) SCHEMATIC DIAGRAM
14.
AUDIO OUT2 (MOTHER C.B.A. 3/4) SCHEMATIC DIAGRAM.
15.
OPERATION (MOTHER C.B.A. 4/4) SCHEMATIC DIAGRAM ......
16.
FRONT SW AND POWER SW SCHEMATIC DIAGRAM ..
17.
SCART SCHEMATIC DIAGRAM (FOR G, B MODELS) ...
CIRCUIT BOARD DIAGRAM
1.POWER SUPPLY C.B.A. (FOR U MODEL) .............. 3-27
2.POWER SUPPLY C.B.A. (FOR G, B, A MODELS) ..........
3.POWER SUPPLY C.B.A. (FOR R MODEL) .............. 3-29
4.MODULE C.B.A. ........................................................... 3-30
5.MOTHER C.B.A. ........................................................... 3-32
6.FRONT SW AND POWER SW C.B.A. ......................3-33
7.SCART C.B.A. (FOR G, B MODELS) ........................ 3-34
SECTION 4
EXPLODED VIEWS & REPLACEMENT PARTS LIST
1.Electrical Replacement Parts List ............................... 4-11
2.Casing Parts & Mechanism Section ........................... 4-13
3.Loading Mechanism Section .......................................4-15
4.Traverse Section ..........................................................4-17
5.Remote Control Transmitter ........................................ 4-18
3-10 3-11 3-12 3-13
3-14
3-15 3-16 3-17 3-18 3-19
3-22 3-23 3-24 3-25 3-26
3-28
SECTION 1 SPECIFICATIONS
Power requlrements: For U model
AC 120V,60Hz
For G, B, A models
AC 220 – 240V, 50Hz
For R model
AC 110 – 240V, 50/60Hz
Power consumption: For U model
14W
(approx. 2W when set to the standly
mode)
For G, B, A, R models
14W
(approx. 4W when set to the standby
mode)
DVD-S796/DV-S5270 DVD-S796/S5270
Signal system: For U model
NTSC
For G, B, A, R models
PAL 625/50, PAL 525/60
Weight: 7lbs. 4oz (3.3kg) Dimensions: 17-1/8” (W) ✕ 10-7/8” (D) ✕ 3-7/8” (H)
[435 (W) ✕ 276 (D) ✕ 99 (H) mm]
Operating temperature range: +50° to +35°C (+41° to +95°F) Operating humidity range: 5 to 90% (no condensation) Discs played:
(1) DVD-VIDEO disc
5” (12cm) single-sided, single-layer 5” (12cm) single-sided, double-layer 5” (12cm) double-sided, single-layer 3” (8cm) single-sided, single-layer 3” (8cm) single-sided, double-layer 3” (8cm) double-sided, single-layer
(2) Compact disc (CD-DA, VIDEO CD)
5” (12cm) disc 3” (8cm) disc
S-video output:
Y output level: 1Vp-p (75Ω) C output level: 0.286Vp-p (75Ω) Output connector: S terminal (1 system)
Video output:
Output level: 1Vp-p (75Ω) Output connector: Pin jack (1 system)
Compact video output:
For U, A, R models only
Y output level: 1Vp-p (75Ω), green PB output level: 0.7Vp-p (75Ω), blue PR output level: 0.7Vp-p (75Ω), red Output connector: Pin jack
Audio output:
Output level: 2 Vrms (1kHz, 0dB) Output connector: Pin jack Mixed output: 1 system Subwoofer output: 1 system
Audio signal output characteristics:
(1) Frequency response:
DVD (linear audio):
2Hz to 22kHz (48kHz sampling) 2Hz to 44kHz (96kHz sampling)
CD audio:
2Hz to 20kHz (EIAJ)
(2) S/N ratio:
CD audio: 115dB (EIAJ)
(3) Dynamic range:
DVD (linear audio): 102dB CD audio: 98dB (EIAJ)
(4) Total harmonic distortion:
CD audio: 0.0025% (EIAJ)
Digital audio output:
Optical digital output: Optical connector
Pickup: Wave length: 655nm
Laser power: CLASS II Laser output: Max. 1.0 mW (Continuous)
Color: DVD-S796BU Black
DV-S5270BU Black DVD-S796BG Black DVD-S796TG Titanium DVD-S796GG Gold DVD-S796BB Black DVD-S796BA Black DVD-S796GR Gold
Specifications are subject to change without notice. Weight and dimensions are approximate.
U ........ U.S .A. mo del G ........ E uropean model
R ........Asian model B ........ United Kindom model
A ........ Australlan model
Manufactured under license from Dolby Laboratories Licens­ing Corporation. “Dolby” and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation.

LOCALE MANAGEMENT INFORMATION

Locale Management Information: This DVD player is designed and manufactured to respond to the Locale Management information that is recorded on a DVD disc. If the Locale number described on the DVD disc does not correspond to the Locale number of this DVD player, this DVD player cannot play this disc. (See page1-3, REGION CODE.)
This product incorporates copyright protection technology that is protected by method claims of certain U.S. patents and other intellectual property rights owned by Macrovision Corporation and other rights owners. Use of this copyright protection techology must be authorized by Macrovision Corporation, and is intended for home and other limited viewing uses only unless otherwise authorized by Macrovision Corporation. Reverse engineering or disassembly is prohibited.
1 - 1

TO SERVICE PERSONNEL

1. Critical Components Information
DVD-S796/DV-S5270
Components having special characteristics are marked and must be replaced with parts having specifications equal to those originally installed.
2. Leakage Current Measurement (For 120V Models Only) When service has been completed, it is imperative to verify that all exposed conductive surfaces are properly insulated from supply circuits.
● Meter impedance should be equivalent to 1500 ohm shunted
by 0.15µF.
● Leakage current must not exceed 0.5mA.
● Be sure to test for leakage with the AC plug in both polarites.
WARNING: CHEMICAL CONTENT NOTICE!
The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/or plastic (where applicable) components may also contain traces of chemicals found by the California Health and Welfare Agency (and possibly other entities) to cause cancer and/or birth defects or other reproductive harm.
DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON WHATSOEVER!
Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyes to solder/flux vapor!
If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling food.
WARNING: Laser Safety
This product contains a laser beam component. This component may emit invisible, as well as visible radiation, which may cause eye damage. To protect your eyes and skin from laser radiation, the following precautions must be used during servicing of the unit.
1) When testing and/or repairing any component within the product, keep your eyes and skin more than
30cm away from the laser pick-up unit at all times. Do not stare the laser beam at any time.
2) Do not attempt readjustment, disassemble or repair of the laser pick-up, unless notes elsewhere in this
manual.
3) CAUTION : Use of controls, adjustments or performance of procedures other than those specified
herein may result in hazardous radiation exposure.
Laser Emitting conditions:
1) When the Top Cover is removed, and POWER SW is turned to the "ON" position, the laser component
will emit a beam for several seconds to detect if a disc is present. During this time (5-10sec.) the laser may radiate through the lens of the laser pick-up unit. Do not attempt any servicing during this period! If no disc is detected, the laser will stop emitting the beam. When a disc is set, you will not be exposed to any laser emissions.
2) The laser power level can be adjusted with VR on pick-up PWB, however, this level has been set by
the factory prior to shipping from the factory. Do not adjust this laser level control unless instruction is provided elsewhere in this manual. Adjustment of this control can increase the laser emission level from the device.
Laser Diode Properties
Material : GaAlAs Laser output : Max.6mW Wavelength : 660~676nm ANSI Class : Class 1 Emission duration : Continuous
* This output is the value measured at a distance of about 200mm from the objective lens surface on the Optical
Pick-up Block,
1 - 2
VARO! : AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALTTIINA NÄKYMÄTTÖMÄLLE
LASER-SÄTEILYLLE. ÄLÄ KATUO SÄTEESEEN.
VARNING! : OSYNIG LASERSTRÅLNING NÄR DENNA DEL ÄR ÖPPNAD OCH SPÄRREN ÄR URKOPPLAD.
BETRAKTA EJ STRÅLEN.
➁ G, B models
➀ G, B models
CLASS 1 LASER PRODUCT
PREVENTION OF ELECTRO STATIC DISCHARGE (ESD) TO ELECTROSTATICALLY SENSITIVE (ES) DEVICES
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor “chip” components. The following techniques are used to help reduce the incidence of component damage caused by electro static discharge (ESD).
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap, which should be removed for potential shock reasons prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4. Use only a anti-static solder removal device. Some solder removal devices not classified as “anti-static (ESD protected)” can generate electrical charge sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive material).
7. Immediately before removing the protective material from the leads of a replacement ES divice, touch the protective material to the chassis or circuit assembly into which the device will be installed. CAUTION: Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) sufficient to damage an ES device).
DVD-S796/DV-S5270 DVD-S796/S5270
There are special components used in this equipment which are important for safety. These parts are marked by in the schematic diagrams, exploded views and replacement parts list. It is
essential that these critical parts should be replaced with manufacturer’s specified parts to prevent shock, fire, or other hazards. Do not modify the original design without permission of manufacturer.
REGION CODE
IMPORTANT SAFETY NOTICE
1
4
2
2
5
6
5
5
2
3
4
1 - 3
PRECAUTION OF LASER DIODE CAUTION:
DVD-S796/DV-S5270
This unit utilizes a class II laser. Visible laser radiation is emitted from the optical pickup lens when the unit is truned on:
1. Do not look directly into the pickup lens.
2. Do not use optical instruments to look at the pickup lens.
3. Do not adjust the preset variable resistor on the optical pickup.
4. Do not disassemble the optical pickup unit.
5. If the optical pickup is replaced, use the manufactures specified replacement pickup only.
6. Use of control or adjustment or performance of procedures other than those specified herein may result in hazardous radiation exposure.

HANDLING PRECAUTIONS FOR TRAVERSE DECK

The laser diode in the optical pickup may break down due to potential difference caused by static electricity of clothes or human body. So be careful of electrostatic breakdown during repair of the optical pickup.
Pickup unit
Handling of optical pickup
1. Do not subject the optical pickup to static electricity as it is extremely sensitive to electrical shock.
2. To prevent the breakdown of the laser diode, an antistatic shorting pin is inserted into the flexible board (FPC Board). When removing or connecting the short pin, finish the job in as short times as possible.
3. Be careful not to apply excessive stress to the flexible board (FPC Board).
4. Do not turn the variable resistor (Laser power adjustment). It has already been adjusted.
Grounding for electrostatic breakdown prevention
1. Human body grounding. Use the antistatic wrist strap to discharge the static electricity from your body.
2. Work table grounding. Put a conductive material (sheet) or steel on the area where the optical pickup is placed and ground the sheet.
Solder
(Magnified view)
Wrist strap (Anti-static bracelet)
Flexible Cable
Use a clip or other item to ground the unit.
1M
Caution:
The static electricity of your clothes will not be grounded through the wrist strap. So take care not to let your clothes touch the optical pickup.
Iron plate or some metals to conduct electricity
1 - 4
N3
N3
N3
N3
N3
N3
N3
N3
N3
N3
N3
N3

REAR PANELS

N3
N3
N3
N3
N3
N3
N3
N3
N3
N3
N3
N3
N3
N3
N3
N3
N3
 U model
N3
N3
N3
 G, B models
N3N3N3
DVD-S796/DV-S5270 DVD-S796/S5270
N3
N3
N3
N3
N3
N3
N3
N3
 R model
N3
 A model
N3
N3
N3
N3
N3
N3N3N3
N3
N3
N3
N3
N3
N3
N3
N3
N3
N3
1 - 5

OPTICAL PICKUP SELF-DIAGNOSIS AND REPLACEMENT PROCEDURE

The optical pickup self-diagnosis function and tilt adjustment check function have been newly added to this player. When repair­ing, use the following procedure for effective Self-diagnosis and tilt adjustment.
DVD-S796/DV-S5270
Be sure to use the self-diagnosis function before replacing the optical pickup when “NO DISC” is displayed. As a guideline, you should replace the optical pickup when the value of the laser drive current is more than 50.
Note
Press the power button to turn on the power, and check the value before the unit warms up (within three minutes).
• Use the self diagnosis function below when "NO DISC" is displayed or unit doesn't read a disc, before replacing the OPU.
"NO DISC" is displayed, unit does not play smoothly, etc.
• Use the optical pickup self-diagnosis function. Method: With no disc in the player.
• Press the "ON SCREEN" button on the
remote control unit while pressing the "STILL/PAUSE" and "OPEN/CLOSE" button on the player.
Value is 50 or less
Check the laser drive current.
Value is more than 50
Replace the optical pickup (Refer to Assembling and Disassembling the Optical Pickup, page 2-1.)
Check the laser drive current after replacement.
• Write the present value into the unit if it is 40 or less.
Do the optical pickup tilt adjustment. (Refer to Optical Pickup Tilt Adjustment, page 2-13.)
Display content
LD
Factory preset value
Replace with a new optical pickup if the present value is more than 40.
Cause:
Damage due to static electricity during replacement.
Method: With no disc in the player.
• Press the "ON SCREEN" button on the remote control unit while pressing the "PAUSE" and "OPEN/CLOSE" button on the player.
• Write the present value into the played if it is 40 or less.
Present value
Use the tilt adjustment check function.
Initialize the player. Press Pause and and Open/Close buttons on unit simultaneously.
End (Refer to Handling After Completing Repairs, page 1-9.)
Writing method:
• Press the "PAUSE" button on the remote
control unit while pressing the "PAUSE" and "OPEN/CLOSE" button on the player.
1 - 6

SELF-DIAGNOSIS FUNCTION AND SERVICE MODES

This unit incorporates a convenient self-diagnosis function for use in troubleshooting.
Display method Display
Diagnosis
Checkpoints
Service numbers displayed during use.
Press the "0" button on the remote control unit while pressing the "STILL/PAUSE" and "OPEN/CLOSE" button on the player.
U11 H01 H02 H03 H04 H05 H06 F0** F1** F2** F3** F4** F5** F6** F7** F8**
Focus error Tray loading error Spindle servo error Traverse error Tracking servo error Seek error Power supply error Disc format error Disc code error Decoder LSI error SDRAM error
IC2001,IC2511,IC5201,pickup IC2001,IC2511 loading motor Spindle motor, IC2501,IC2001 Stepping motor,IC2511,IC2001 IC2001,IC2501,IC5201,pickup,disc Stepping motor,IC2511,IC2001 IC1021,IC1121,IC1151,IC6001 If this type of error occurs,refer to
Examples of Repairs Using Error Codes, in page 1-8.
IIC BUS error DSC ECC error Microprocessor error Microprocessor error
1. Service Mode Table
The service mode can be activated by pressing various button combinations on the player and remote control unit.
Player buttons
PAUSE
OPEN/CLOSE
STILL/PAUSE SKIP OPEN/CLOSE
Remote control unit button
0
5
6 7
9
ON SCREEN
STILL/PAUSE
Displaying the UHF display F_ _ _
Tilt adjustment (JIT 070 to JIT 090 is normal range for a good pickup head.)
Checking the region numbers and broadcast system Checking the program version
Lighting Confirmation Function of Display Tube Checking the laser drive current
Writing the laser drive current value after replacing the optical pickup (do not use for anything other than optical pickup replacement) Initializing the DVD player (restoring factory preset settings) Use when replaceing a microprocessor, microprocessor peripheral parts, or C. B. A.
Application
Refer to Self-Diagnosis Function (UHF Display)
Refer to Optical Pickup Tilt Adjustment, in page 2-13.
Check the IC6302 FLASH ROM program.
Refer to Optical Pickup Self­Diagnosis and Replacement, in page 1-6.
Procedure.
Refer to Initializing the DVD Player, in page 1-9.
DVD-S796/DV-S5270 DVD-S796/S5270
Note
,in page 1-7.
2. Self-Diagnosis Function (UHF Display)
1 - 7
3. Examples of Repairs Using Error Code
DVD-S796/DV-S5270
Refer to this section when carrying out repairs.
Error display
F0** F103 F4FF F500 F501 F502 F504 F505 F506 F600 F601 F602 F603 F610 F611 F612 F620 F621 F700 F701 F702 F880 F890 F891 F8A0 F893 F894
Malfunction example
Disc, IC7001 Disc, IC7001 IC6001 Optical pickup, IC2001, IC5201, IC2511, IC2501 IC2001, IC6201 IC2501, IC2511, IC2001, IC5202 IC5202, IC2001 Disc, IC2501, IC2511, IC5202, IC2001 Disc, Optical pickup, IC2001 Disc, IC7001, IC5202, IC2001 Disc, IC7001 Disc, IC5202, IC2001 Disc, IC5202, IC2001 IC7001 IC7001, IC5202, IC2001 IC7001, IC15202,IC2001 Laser drive circuit Laser drive circuit IC6201 IC6201 IC6201 IC6201 IC6201 IC6201 IC6201 IC6302 IC6303
4. Sales Demonstration Lock Function
This function prevents discs from being lost when the unit is used for sales demonstrations, by disabling the disc eject function. “LOCKED” is displayed on the unit, and ordinary operation is disabled.
4-1. Setting Method
The sales demonstration lock function is set by simultaneously pressing the “POWER” button of DVD Player on the remote control unit and the “STOP” button on the main unit. (“LOCKED” is displayed when the lock function is engaged.)
4-2. Release Method
The function can be released using the same procedure as for setting. If the remote control unit is not at hand, the function can be released by using the same method as for player initialization (pressing the “PAUSE”, “SKIP buttons simultaneously).
” and “OPEN/CLOSE”
1 - 8

SERVICE PRECAUTIONS

1. Initializing the DVD Player
Initialize the DVD player whenever you replace a microprocessor, microprocessor peripheral parts, module C.B.A or mother C.B.A.
1-1. Precautions
The customer settings will return to factory preset settings when the player is initialized. Make a note of the settings and reset them after initializing.
• When resetting, see the Initial Setting in the Operating Instructions.
1-2. Initialization Method
The player will be initialized (return to the factory preset condition) when you press the “PAUSE”, “SKIP “ and “OPEN/CLOSE” buttons simultaneously. When the DVD player is initialized, “All Clear” appears on screen, it also displays “INITIALIZED”.
2. Handling After Completing Repairs
Use the following procedure to secure the traverse unit in the standby position.
2-1. Method
With the power turned on:
1. Press the “OPEN/CLOSE” button to close the tray.
2. Press the “POWER” button to turn off the power.
3. Disconnect the power plug from the outlet.
DVD-S796/DV-S5270 DVD-S796/S5270
2-2. Precautions
Do not disconnect the power plug from the outlet with the tray still open, then close the tray manually. If you were to do so, the traverse unit would not go to the upper (standby) position, and the player could not be transported.

SERVICE TOOLS AND EQUIPMENT

1. Service Tools and Equipment Table
Application
General
Tilt adjustment
Inspection
Others
Confirmation
Electrical adjustment
General Static electricity countermeasures
DVD test disc
Hex wrench Adjustment table Extension cables (Power supply C.B.A. to mother C.B.A.)
Extension cable (module C.B.A. to mother C.B.A.) Screw lock Grease
Lubricant Grease CD test disc VCD test disc Oscilloscope Probe AV cable TV monitor General tools (Screwdriver, etc.) Soldering iron (with ESD countermeasure) Anti-static wrist strap Conductive material (conductive sheet)
Name Number
DVDT-S15 (AAX07320) or DVDT-S01 (TX946080) JZS0100 (TX946380) , 1.2mm
JGS0099 (TX946360) JGS0098 (TX946370) × 2 RZZ0L01 (TX946400) JGS0091 (TX946260) JGS0092 (TX946270) JZS0648 (TX946410) JGS0101 (TX946390) SZZP1054C (TX946090)
PVCD_K06 (TX946090)
VJA0658 (MX605190)
2. Storing and Handling Test Discs
Surface precision is vital for DVD test discs. Be sure to store and handle them carefully.
1. Do not place discs directly onto the workbench, etc., after use.
2. Handle discs carefully in order to maintain their flatness. Place them into their case after use and store them verically. Store discs in a cool place where they are not exposed to direct sunlight or air from air conditioners.
3. Accurate adjustment will not be possible if the disc is warped from being placed on a surface made of glass, etc. If this
happens, use a new test disc to make optical adjustments.
4. If adjustment is done using a warped disc, the adjustment will be incorrect and some discs will not be playable.
1 - 9

OPERATING INSTRUCTIONS

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Control reference guide
DVD-S796/DV-S5270
1
NATURAL SOUND DVD PLAYER
STANDBY/ON
11
ANGLE PROG.
DVD
17 18 19 20 21 22
Player
1
Standby/On button (STANDBY/ON) .......................14
Press to switch the unit from on to standby mode or vice versa. In standby mode, the unit is still consuming a small amount of power.
2
Disc tray ....................................................................14
3
Disc tray open/close button ( OPEN/CLOSE) ..... 14
4
Play button ( ) .......................................................14
5
Pause button ( ) ....................................................16
6
Stop button ( ) .......................................................15
7
FL display
8
Virtual Surround Sound indicator (V.S.S.)............. 21
9
Skip button ( SKIP ) .................................... 16
10
Search button ( SEARCH ) .........................17
11
12
13 14 15
16
Rotates during play. Rotates fast clockwise or counter clockwise during rapid advance (reverse). Rotates slowly clockwise or counter clockwise during slow-motion play.
Illuminates in the stop mode.
Illuminates during playback. Flashes when the RESUME function is ON. Illuminates during repeat play. Illuminates in the still picture (pause) mode. Elapsed playing time from the start of the title/track during play. Audio channel information recorded in the disc being played back (e.g. 2ch or 5.1ch).
Surround (left)
Front (left)
D I G I T A L
DVD / VIDEO CD / CD
V.S.S.
87 9 10
15 1612 1314
Owner's Manual Page
DVD VCD
Center Surround (right)
Subwoofer Front (right)
32 4 5 6
f OPEN/CLOSE
:
SKIP
;
96kHz 24bit
Buttons such as function in exactly
1
the same way as the buttons on the player.
1
C
POWER
SEARCH
D
6 5
9
STOP
∫
SKIP
TOP MENU
H /I
PAUSE
;
OPEN/CLOSE
PLAY
1
SLOW/
SEARCH
6:9 5
MENU
23 24
ENTER
25 26 27 28 29 30 31
17
A DVD is loaded.
18
It is possible to switch the angle.
19
Illuminates during program play.
20
Title/chapter number
21
Track number
VCD
CD
DVD
PLAY MODE
SUBTITLE
REPEAT
A-B
V.S.S.
CANCEL
SET UP
Linear PCM of 96 kHz sampling is being played.
22
Linear PCM of 24 bit is being played.
RETURNON SCREEN
AUDIO ANGLE
123
456
789
0S10
DVD
VCD
CD
Remote control
Owner's Manual Page
23
Top menu button (TOP MENU) ...................................... 14
24
Cursol button ( , , , ) /Enter button (ENTER) .. 14
25
On screen button (ON SCREEN) ................................... 25
26
Play mode button (PLAY MODE) ...................................23
27
Subtitle button (SUBTITLE)............................................ 20
28
Repeat button (REPEAT) ................................................ 22
29
A-B repeat button (A-B) .................................................. 22
30
Virtual Surround Sound button (V.S.S.)........................ 21
31
Setup buttons (SET UP) .................................................28
32
Slow/Search buttons ( , SLOW/SEARCH) ........17
33
Menu button (MENU) ......................................................14
34
Return button (RETURN) ................................................ 14
35
Angle button (ANGLE) .................................................... 20
36
Audio button (AUDIO)..................................................... 19
37
Numeric buttons (1-9, 0, 10) ........................................ 14
• To select a 2-digit number
Example: To select track 23 Press [ 10], then [2] and [3].
38
Cancel button (CANCEL)................................................ 23
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3 4
32 33 34
35
36
37
38
1 - 10
SECTION 2 ASSEMBLING AND DISASSEMBLING THE CASING AND CHECKING C.B.A.s
1. Disassembly Procedure
When servicing the unit, use the following procedure to disassemble the casing and inside parts for internal inspection.
Top cover
Tray
Front panel
Rear panel
DVD-S796/DV-
S5270
Mechanism unit
Module C.B.A.
Mother C.B.A.
Front SW C.B.A. and Power SW C.B.A.
Power Supply C.B.A.
2 - 1
S5270
2. Casing Parts and C.B.A. Positions
DVD-S796/DV-
Power supply C.B.A.
Top cover
Power SW C.B.A.
Mechanism Loading C.B.A.
Front panel
Module C.B.A.
Mother C.B.A.
Front SW C.B.A.
3. Service Positions
Note
To inspect the loading base unit, position the left side upward (as viewed from the front).
Power supply C.B.A.
Mother C.B.A.
TX946360
AAX16590
Mechanism Loading C.B.A.
AAX16600
AAX16610
Module C.B.A.
2 - 2
4. Disassembling the Top Cover
1. Remove the 4 screws.
Screw
2. Remove the 3 screws.
Top Cover
Screw
DVD-S796/DV-
S5270
6. Disassembling the Front Panel
1. Release the 3 tabs on the bottom.
2. Release the 2 tabs on the left and right.
SERV ICE M A N UAL
Screw
5. Disassembling the Tray
1. Turn the lever clockwise.
2. Move the tray in the direction of the arrow until it locks.
3. Release the tab locks on the left and right, then pull out the tray.
Tab
Lever
3. Release the 2 tabs.
4. Disconnect the 2 flexible cables
Tab
Flexible cable
.
Flexible cable
Tab
2 - 3
S5270
7. Disassembling the Loading
DVD-S796/DV-
Base Unit
1. Remove the 4 screws.
2. Pull out the loading base unit vertically.
Note
There is a danger of damaging the connectors.
Screw
Connector
Loading Base Unit
Screw
2. Connect the module C.B.A. to the mother C.B.A. extension cables for inspection.
• Extension cable: AAX16590 (VUC8026)
• Extension cable: AAX16610 (JGS0116) Mother C.B.A. Module C.B.A. PP4201-PS4201 PP3201-PS3201
3. Connect the mechanism loading C.B.A. to the mother C.B.A. with the extension cables for inspection.
• Extension cable: AAX16600 (VUC8027) Mother C.B.A. Mechanism Loading C.B.A. PP2591-PS2591
Mother C.B.A.
PP4201
PP2591
AAX16600
PP3201
PS2591
PS4201 PS3201
AAX16590
AAX16610
8. Checking the Module C.B.A.
1. Remove the screw.
Module C.B.A.
PS4201 PS3201
Screw
Note
Be sure to initialize the player whenever you replace a C.B.A. (Refer to section 1-9, Initializing the DVD Player.)
9. Disassembling the Rear Panel
1. Remove all of the screws connected to the rear panel. (The number of screws varies according to the model).
Screw
Screw
Screw
2. Release the two tabs on the left and right.
Loading C.B.A.
PS2591Mechanism
2 - 4
10. Checking the Power Supply
PP2591
PP3201
PP4201
AAX16600
AAX16590
PS2591
PS4201
PS3201
AAX16610
Mother C.B.A.
Screw
Front SW C.B.A.
C.B.A.
1. Remove the 3 screws.
DVD-S796/DV-
S5270
3. Checked by connecting the module C.B.A. and the mother C.B.A. with the extension cables.
• Extension cable: AAX16590 (VUC8026)
• Extension cable: AAX16610 (JGS0116) Module C.B.A. Mother C.B.A. PS3201-PP3201 PS4201-PP4201
4. Checked by connecting the mechanism loading C.B.A. and the mother C.B.A. with the extension cables.
• Extension cable: AAX16600 (VUC8027) Mechanism loading C.B.A. Mother C.B.A. PS2951-PP2591
2. Carefully pull out the power supply C.B.A.
Note
There is a danger of damaging the connectors.
3. Connect the power supply C.B.A. and the mother C.B.A. with the extension cable for inspection.
•
Extension cable: TX946360 (JGS0099) (connects the power supply C.B.A. PS1101 and the mother C.B.A. PP1101)
11. Checking the Mother C.B.A.
1. Remove the 4 screws.
2. Release the tab.
Note
Be sure to intialize the player whenever you replace a C.B.A. (Refer to section 1-9, initializing the DVD player.)
12.
Checking the Power Switch C.B.A.
1. Remove the 4 screws.
Power SW C.B.A.
Screw
13.
Checking the Front Switch C.B.A.
1. Remove the 9 screws.
2 - 5
S5270

ASSEMBLING AND DISASSEMBLING THE OPTICAL PICKUP (MECHANICAL PARTS)

The optical pickup can be damaged by static electricity from your body. Be sure to take static electricity countermeasures when working around the optical pickup.
DVD-S796/DV-
1. Handling the Optical Pickup
The optical pickup can be damaged by static electricity from your body. Be sure to take static electricity countermeasures when working around the optical pickup.
1. The optical pickup is an extremely high-precision mechanism. Do not subject it to strong impact.
2. To preserve the quality of the optical pickup replacement parts during transport and installation, the terminals of the laser diode are short-circuited. After replacing the parts, use the proper procedure to return the laser diode to its original condition. (Refer to page 2-11, Assembling the Optical Pickup.)
3. Testers cannot be used to check the laser diode of the optical pickup. The power supply inside the tester can easily damage the laser diode.
4. Take care when handling the flexible cable because excessive force can cause it to break.
5. You cannot adjust the semifixed resistor for laser power adjustment. Do not turn it.
2. Disassembly Procedure
Use the following procedure to replace major parts. For the assembly procedure, follow the flow chart in reverse.
Top cover
Pulley gear
Tray
Front panel
Mechanism unit
Clamp base unit
Static electricity
countermeasures
Traverse unitMechanism Loading C.B.A.
Intermediate chassis
Clamper weight
Clamper yoke
Magnet
Clamper
Vertical cam, Drive gear
Deceleration gear
2 - 6
3. Lubricating the Loading Base Unit
Grease EM-30LG (TX946270)
0.01g
Grease EM-30LG (TX946270)
0.01g
Grease EM-30LG (TX946270)
0.01g
Grease EM-30LG (TX946270)
0.01g
Grease EM-30LG (TX946270)
0.01g
Grease EM-30LG (TX946270)
0.02g
Grease EM-30LG (TX946270)
0.02g
Grease EM-30LG (TX946270)
0.01g
Intermediate chassis
Traverse unit
Vertical cam drive gear
Drive gear
Deceleration gear
Belt
Tray
Pulley gear
Mechanism Loading C.B.A.
When replacing parts, Iubricate the parts maked “XXX” in the diagram
DVD-S796/DV-
S5270
2 - 7
S5270
4. Static Electricity Countermeasures
DVD-S796/DV-
The laser diode inside the traverse unit (optical pickup) can be damaged by static electricity from your body. Be sure to take static electricity countermeasures when working around the optical pickup.
4-1. Static Electricity Countermeasure Methods
1. Ground yourself Use an anti-static wrist strap to discharge static electricity from your body.
2. Ground the workbench Lay a conductive material (sheet) or steel sheet on the surface where the traverse unit (optical pickup) is to be placed, then ground the sheet.
Anti-static wrist strip
1M
Conductive material (sheet) or steel sheet
4-2. Short-circuit the laser diode
Solder the land in the flexible cable of the optical pickup.
Notes
• Be sure to do this before disconnecting the flexible cable of the optical pickup from the module C.B.A.
• Use an anti-static soldering iron to short-circuit and unshort-circuit laser diode.
(Recommended soldering iron: Hakko with ESD countermeasure)
• After you have finished repairing the laser diode, follow the correct procedure to remove the solder from the short-circuit location. (Refer to page 2-7, Assembling and Disassembling the Optical Pickup (Mechanical Parts).)
Pickup unit
Flexible cable
Solder
(Magnified view)
2 - 8
Use a clip or other item to ground the unit.
5.
Disassembling the Clamp Base Unit
1. Remove the 2 screws.
Loading base
2. Release the 3 tabs on the clamper.
Clamper weight
DVD-S796/DV-
S5270
3-clamper tabs
Screw
Screw
Clamp base unit
6. Disassembling the Clamper Weight, Clamper Yoke, Magnet and Clamper
1. Remove the tab, and pull out the clamper.
Clamper unitTab
Magnet
Clamper weight
Magnet
Clamper
Clamper base
7. Disassembling the Traverse Unit
1. Remove the 3 screws.
Tab
Clamper base
Stopper
Screw
Screw
Intermediate chassis
Traverse unit
Traverse unit
Note
Be sure to take static electricity counterneasures before disconnecting the flexible cable. (Refer to page 2-8, Static Electricity Countermeasures.)
Intermediate chassis
2 - 9
S5270
2. Disconnect the 2 flexible cables.
DVD-S796/DV-
8. Disassembling the Stepping
1. Disconnect the flexible cable.
2. Remove the 2 screws.
Note
Take care when handling the flexible cable bacause it can be broken by excessive force.
Motor Unit
9. Disassembling the Optical Pickup Unit
1. Remove the hook of the FPC holder, then remove the FPC holder itself.
2. Remove the screw.
3. Release the tab, then remove spring holder 1.
Note
Be sure not to lose the spring.
4. Remove the guide shaft.
Note
Be sure to adjust the optical pickup tilt after replacing the optical pickup. (Refer to page 2-13, Optical Pickup Tilt Adjustment.)
Screw
Guide shaft
Guide shaft
Tab
Tab
Screw
Spring holder 1
Spring holder 1
Tilt spring
Tilt spring
Optical pickup unit
Optical pickup unit
Stepping motor
Screw
Stepping motor unit
Flexible cable
Traverse chassis
Connector
C.B.A
Motor FPC
Traverse chassis
Traverse chassis
2 - 10
DVD-S796/DV-
10. Disassembling the Nut Unit
1. Remove the screw.
Notes
• The nut unit is not part of the optical pickup. Before replacing the optical pickup, remove the nut unit for use with the new optical pickup.
• After installation, use screw lock to lock the screw in position.
• When reassembling, use screw lock to lock the screw in position after attaching it.
11. Disassembling the Sub-Shaft Preload Spring
1. Remove the screw.
Notes
• Handle the sub-shaft preload spring carefully because the shape of the tip is easily deformed.
• The sub-shaft preload spring is not part of the optical pickup. Before replacing the optical pickup, remove the sub-shaft preload spring for use with the new optical pickup.
• After installation, use screw lock to lock the screw in position.
12. Assembling the Optical Pickup
1. Install the optical pickup.
Note
Take care not to attach the tilt spring and guide shaft in the wrong order.
Nut spring
Nut
screw
Nut unit
Optical pickup
(Rear surface)
Spring holder 1
Traverse chassis
Adjustment screw
Tilt spring
Guide shaft
Protruding part
Optical pickup unit
Tilt spring
Spring holder 1
Screw
Guide shaft
Tab
Traverse chassis
Screw
Sub-shaft preload spring
(Rear surface)
Optical pickup
2. Insert the pickup FPC into connector FP5201 on the module C.B.A.
S5270
2 - 11
S5270
3. Remove the solder from the pickup FPC’s soldered short-circuit
DVD-S796/DV-
Open the circuit after short-circuiting it.
4. Adjust the optical pickup tilt after removing the solder. (Refer to page 2-13, Optical Pickup Tilt Adjustment.)
5. If installing a new pickup, write the new head current into memory as shown on page 1-6. Do this first after turning on the unit with NO disc and while the unit is cold (within the first 3 minutes of power ON), or the jitter reading will not be accurate for the new pickup head.
Remove the solder.
(Magnified view)
Solder removal direction
13. Disassembling the Spring Motor Unit
1. Remove the three screws.
Note
Be sure to adjust the optical pickup tilt after replacing the spindle motor unit.
Spindle motor unit
Traverse chassis
Screw
2 - 12
14. Optical Pickup Tilt Adjustment
DVD-S796/DV-
S5270
Measurement point
Main unit
service display
Measuring equipment, tools
Hex wrench (part number: TX946380), 1.2mm
Screw lock (part number: TX946400)
Replaced the optical pickup.
•
Replaced the spindle motor.
STEP7
STEP1
Start with Power ON and in play.
OP/PAUSE" button: main unit
"ST "OPEN/CLOSE" button: main unit "5" button: remote control unit
STEP2
Main unit display Check to see that "JIT xxx" is displayed.
Present jitter value.
•
• Replaced the peripheral parts
of the optical pickup, etc.
Adjustment point Mode Disc
Tangential adjustment screw
Tilt adjustment screw
Press simultaneously
T1 (inner periphery) play T2 (outer periphery) play
Adjustment value
(JIT 070 to 090 is normal.)
Adjust to the minimum jitter value.
DVDT-S15 (AAX07320) or DVDT-S01 (TX946080)
(070 = 7% and 090 = 9% jitter.)
Tangential adjustment screw
Tilt adjustment screw 1
Tilt adjustment screw 2
STEP3
Play test disc title 1 (inner periphery) Tangential adjustment screw Adjust to the minimum jitter value.
STEP4
Play test disc title 43 (outer periphery) Tilt adjustment screw 1 Adjust to the minimum jitter value.
STEP5
Play test disc title 43 (outer periphery) Tilt adjustment screw 2 Adjust to the minim (070 to 090 is normal.)
STEP6
NG
Check condition after adjustment
STEP7
um jitter value.
OK
Do steps 3-5 from the bottom of the main unit using a hex wrench.
Repeat adjusting tilt adjustment screws 1 and 2 alternately , two or three times.
Play the disc to make sure there is no picture degradation in the inner, middle and outer peripheries, and no audio skipping.
Change in jitter value
•
Jitter value depends on the model:
(1) If the jitter value changes like A, the optimum point is easy to find (2) If the jitter value changes like B,
BA
set the optimum point near the middle.
Optimum point
Adjustment angle
2 - 13
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