Sharp DV-L70S User manual

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DV-L70S
DV-L70BL
DV-L70W
SY9S7DV-L70S/
SERVICE MANUAL
Page
1. IMPORTANT SAFEGUARDS AND PRECAUTIONS .........................................................................2
2. FEATURES ........................................................................................................................................ 4
3. SPECIFICATIONS ............................................................................................................................. 4
4. PART NAMES .................................................................................................................................... 6
5. DISASSEMBLY METHOD ................................................................................................................. 7
6. ADJUSTMENT METHOD................................................................................................................... 8
7. TEST MODE .................................................................................................................................... 13
8. TROUBLESHOOTING ..................................................................................................................... 16
9. IC FUNCTION LIST.......................................................................................................................... 20
10. SEMICONDUCTOR LEAD IDENTIFICATION .................................................................................52
11. WIRING DIAGRAM .......................................................................................................................... 53
12. BLOCK DIAGRAMS ......................................................................................................................... 54
13. SCHEMATIC DIAGRAMS ................................................................................................................ 62
14. PRINTED WIRING BOARD ASSEMBLIES......................................................................................74
15. REPLACEMENT PARTS LIST ......................................................................................................... 79
16. PACKING OF THE SET ................................................................................................................... 92
CONTENTS
SHARP CORPORATION
In the interests of user-safety (Required by safety regula-
tions in some countries) the set should be restored to its
originalcondition and onlyparts identicaltothose specified
be used.
MODELS
SERVICE MANUAL PORTABLE DVD VIDEO PLAYER MODELS DV-L70S/BL/W
PORTABLE DVDVIDEO PLAYER
DV-L70S
DV-L70BL
DV-L70W

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1. IMPORTANT SAFEGUARDS AND PRECAUTIONS

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åå
åå
åCAUTION
BEFORE BATTERY DESTROY
ËË
ËË
ËNICKEL-CADMIUM BATTERY
Thefollowing program isavailable inthe UnitedStates.Please consultlocal environmentalauthorities concerning the
availability of this or other programs in your area.
The RBRCTM Seal
SHARPparticipatesintheRBRCTM*Nickel-CadmiumBatteryRecyclingProgramintheUnitedStates.TheRBRCTM
Seal on our battery pack contained in our product indicates that SHARP is voluntarily participating in an industry
program to collect and recycle these batteries. The RBRCTM program provides you with a convenient alternative
to placing spent Nickel-Cadmium battery packs into the trash or municipal waste stream, which is illegal in some
areas.Attheendoftheirusefullife,theNickel-Cadmiumbatterycanbedroppedoffatthenearestcollectioncenter
for recycling. For information on the nearest collection center, call 1-800-8-BATTERY or your local recycling
center.IfyouarelocatedoutsidetheUnitedStates,contactyourlocalauthoritiesforinformationconcerningproper
disposaland/orrecyclingofthisbattery.SHARP'sinvolvementinthisprogramispartofourcommitenttoprotecting
our environment and conserving natural resources.
[Footnote] *RBRCTM is a trademark of the Rechargeable Battery Recycling Corporation.
ËË
ËË
ËNICKEL-METAL HYDRIDE BATTERY
ËË
ËË
ËLITHIUM or LITHIUM-ION BATTERY
ËË
ËË
ËSEALED LEAD BATTERY
Battery disposal
Contains the above Rechargeable Battery. must be recycled or disposed of properly.
Remove the Battery from the products and contact Federal or State Environmental Agencies for information on
recycling and disposal options.

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2. FEATURES
7" LCD Screen and Stereo Speakers
• A big 7" LCD screen and built-in stereo speakers provide exciting DVD viewing, even without connecting to a TV.
• Dolby Virtual provides high-quality surround sound.
2-WAY Power Supply (Battery pack is sold separately.)
• A 2-way power supply allows operation using the supplied AC adapter for indoor play, or the battery pack sold
separately for outdoor play.
Compact, Lightweight Design
• About the size of a movie DVD case, your DVD player is designed to go along just about anywhere.
High-Resolution Images, High-Quality Sound
• A high-resolution 336,960-pixel LCD screen produces images of outstanding quality.
• Digital gamma correction and digital super picture provide more realistic image detail.
• Dolby Virtual ensures richer sound from two built-in speakers.
AV input/output, optical digital output jack equipped as standard
•An optical digitaloutput jack (which doubles asthe audio input/outputjack) can be used tooutput a streamof *1Dolby
Digital5.1channelaudio, *2DTS digitalaudioandAudioMPEG. Connecting aDolbyDigital/DTS/AudioMPEGdigital
surround processor or amplifier to this jack creates an environment of amazingly powerful surround sound.
•TheAVinput/outputjackcanbeusedtoconnectavideodeckorcamcordertoyourDVDplayer.Oryoucanusethese
jacks to connect to a TV for big-screen viewing. (Output only is supported for S-video. An S-video signal cannot be
input to your DVD player.)
*1Manufactured under license from Dolby Laboratories. "Dolby", "Pro Logic" and the double-D symbol are trademarks
of Dolby Laboratories.
Confidential Unpulished Works. C 1992-1997 Dolby Laboratories, Inc. All rights reserved.
*2"DTS" and "DTS Digital Surround" are trademarks of Digital Theater Systems, Inc.
3. SPECIFICATIONS
Product: Portable DVD Video Player
Model: DV-L70S/BL/W
Signal System: NTSC/PAL
Supported Disc Types: DVD (Region Number 2, ALL), Video CD, Audio CD (DV-L70S/BL)
DVD (Southeast Asia: Region Number 3, ALL/Australia and New Zealand:
Region Number 4, ALL), Video CD Audio CD (DV-L70W)
Video Input/Output: Input/Output Jack: Mini jack × 1 (accepts supplied S-video/video cord)
Input/Output Levels: 1Vp-p (75Ω)
S-Video Output: Y Output Level: 1Vp-p (75Ω)
C Output Level: 0.286Vp-p (75Ω)
Output Jack: Mini jack (shared with Video In/Out) × 1
(accepts supplied S-video/video cord)
Audio Input/Output: Input /Output Jack: Mini jack × 1 (accepts supplied audio cord)
Input/Output Levels: 2Vrms (1kHz, 0dB)
Digital Audio Interface: Optical digital output: Mini jack (shared with audio In/Out)
Audio Output: 0.8W + 0.8W
Headphones Output: Output Jack: Mini jack (stereo)
Display: Screen Size: 7 inches (87.8 (315/32") (H) × 155.5 (61/8") (W) mm)
Type: Transmissive TN liquid crystal panel
Drive: TFT (thin transistor) active matrix
Pixels: 336,960 (234 (H) × 480 (W) × 3),
Effective Pixel Rate:99.99% minimum
Speakers: Two 28mm round speakers
Light Source: Internal (fluorescent)
Video Signal: Horizontal Resolution: 480 lines (DVD)
S/N Ratio: 60 dB minimum

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Audio Signals: Frequency Characteristics:
Linear PCM DVD: 4Hz to 22kHz (48kHz sampling)/
4Hz to 44kHz (96kHz sampling)
CD: 4Hz to 20kHz (EIAJ)
(Audio MPEG Version 2.0)
S/N Ratio: CD: 95 dB 1kHz (EIAJ)
Dynamic Range: Linear PCM DVD: 94dB (EIAJ)
CD: 94dB (EIAJ)
Total Harmonic Distortion Ratio: 0.006% maximum (EIAJ)
Power Requirements: AC Adapter: 9V DC
Power Consumption: Main Power On: 11W average (15.5W maximum)
(AC Adapter) Standby: 0.5W (Power/standby lamp lit red)
Main Power Off:0W
Dimensions: 188 (W) × 141 (D) × 25.4 (H) mm (713/32" × 59/16" × 1")
(except for projections)
Weight: 620g (1.37 lbs)
Operating Temperature: 5°C to 35°C (41°F to 95°F)
Operating Humidity: 80% RH maximum
Storage Temperature: -20°C to 40°C (-4°F to 104°F)
AC Adapter Specifications
Power Requirements: 110 to 240V AC, 50/60Hz
Rated Input Capacity: DVD Operation: 30VA
Charging (110V): 30VA
Rated Output: DVD Operation: 9V DC
Charging: 9V DC
Dimensions: 58 (W) × 104 (D) × 275 (H) mm
(219/64" × 47/64" × 1053/64")
Weight: 170g (0.38 lbs)
Battery Pack Specifications Type: Lithium-ion type
DC output: 7.4V
Capacity: 4200mAh
Operating temperature: 0°C to +40°C (32°F to 104°F) (charging: 10°C to 30°C (50°F to 86°F))
Max. Dimensions: 184 (W) × 134.5 (D) × 14.5 (H) mm
(71/4" × 519/64" × 37/64") without protruding parts
Weight: 430g (0.95 lbs)
Specifications are subject to change without notice.
Weight and dimensions are approximate.
Digital Output (linear PCM)
· The digital output format used in this DVD video player is linear PCM audio sampling at 44.1 kHz or 48 kHz.
Linear PCM sound for DVD video discs sampled at 96 kHz cannot be output digitally.
Check the disc jacket for information on the audio sampling used.
3-1. ACCESSORIES
Accessories: Audio Cord x 1, S-Video/Video cord x 1, AC Power Cord x 1, UM/SUM-3 battery x 2,
Remote Control Unit x 1, Earphones x 1, AC Adapter x 1, Operation Manual x 1

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For details on the use of each control.
4. PART NAMES

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5. DISASSEMBLY METHOD
5-1. DISASSEMBLY METHOD
1.Remove the nine screws 1.
2. Loosen the two screws 2.
3.AfteropeningtheLCDunit,removethehingeclawofcabinetAtodetachitfrom
cabinet B.
Note: The power SW button is also removed. Be careful not to forget it when
assembling the unit.
4. Remove the FFC A from the main PWB.
1
2
A
Power SW Button
3
4
5
6
5
10
11
11
12
13
14
15
16
17
778
8
9
Space Washer
Space Washer
5. Remove the screws 3.
Note: Check the screws before assembling because they are different
depending on the right and left hinges.
6. Remove the connector 4from the main PWB.
7. Remove the pickup FPC/sled lead connector 5.
8. Remove the screws 6fixing the DC jack PWB.
9. Remove the four LCD rubber caps 7.
10. Remove the four screws 8.
Note:Becarefulnottoforgettoputspacewasherswhenassemblingbecause
they are tightened with the above screws.
11. Remove the cabinet D. At this time, remove engagement claws (two on the
upperLCDpanel,twoontherightandleftsides,twoonthelowerLCDpanel).
Note: Do not break the claws on the right and left sides by opening cabinet C
a little.
12. Remove the right and left speaker connectors 9.
13. Remove the screw 0.
14. Remove the FPC qfrom the connector.
15. Remove the screw w.
16. Remove the FPC efrom the connector.
17. Remove the screw r.
18. Remove the connector t.
19. Remove the four screws y.
20. Remove the three claws on the control panel (front: 2 pcs., rear: 1 pc.).
21. Open the disc cover u180˚ to remove it from cabinet A.

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Parts Code Price Code Remarks Parts Code Price Code Remarks
QCNW-8145GEZZ AQ P.U. extension, 30-pin QCNW-8151GEZZ AQ Inverter extension, 6-pin
QCNW-8146GEZZ AQ Spindle extension, 13-pin QCNW-8152GEZZ AQ LCD panel extension, 32-pin
QCNW-8147GEZZ AN Sled extension, 2-pin QCNW-8154GEZZ AQ Operation PWB extension, 12-pin
QCNW-8148GEZZ AM Power supply extension, 14-pin QCNW-1766TAZZ BF Inverter junction PWB
QCNW-8149GEZZ AQ Main LCD extension, 14-pin QPWBF5002GEZZ BF LCD junction PWB
QCNW-8150GEZZ AQ Main LCD extension, 14-pin QPWBF5003GEZZ BF Pickup junction PWB
Adjustment VR R1102
Adjustment Point Put a voltmeter between 6PIN (+7.5V) and 4PIN (GND) of TP1191.
Input Signal/Setting No input
Adjustment Method Adjust it to 7.50±0.02V.
Adjustment VR R1103
Adjustment Point Visual observation of the panel
Input Signal/Setting Monoscope full screen
Adjustment Method Adjust the screen so that it is located in the center.
Adjustment VR R1104
Adjustment Point Observe the 3PIN of TP1191 with a frequency counter.
Input Signal/Setting No input, external input mode
Adjustment Method Adjust it so as to get the HSY frequency of 15.625±0.01KHz
(64.0µS).
HSY
15.625KHz
(64.0µS)
6-2. ADJUSTMENT PROCEDURE AND METHOD OF LCD PWB SIDE
1. 7.5V adjustment
2. Free run adjustment
3. Screen center adjustment
Drawing for service jigs
Operation cabinet
Mechanism
Power
supply PWBPA
AE AD
AC
AA
CN302
CN301AB
MA
FFC
FFC spindle
Lead wire
FFC
Pickup junction PWB
QPWBF5003GEZZ Pickup
QCNW-8145GEZZ
QCNW-8146GEZZ
QCNW-8147GEZZ
Sled
Power supply, 14-pole
QCNW-8148GEZZ QCNW-8154GEZZ
QCNW-8150GEZZ
LCD junction
QCNW-8152GEZZ
LCD junction PWB
QPWBF5002GEZZ
Inverter junction PWB
QCNW-1766TAZZ
Inverter
QCNW-8151GEZZ
Inverter PWB
QCNW-8149GEZZ
Lead wire
LC
LB LA
LCD LCD PWB
F
F
C
F
F
C
Panel
Main PWB
6. ADJUSTMENT METHOD
6-1. HARNESS LIST FOR SERVICE PARTS

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Adjustment Point Put voltmeters in 4PIN (GND), 5PIN (-16V) and 7PIN (13V) of TP1191.
Input Signal/Setting Check in the DVD mode.
Adjustment Method Check that each voltage indicates -16±1V and 13±0.5V respectively.
6-3. CHECK ITEMS OF LCD PWB SIDE
1. Power supply voltage check
Adjustment Point Check the panel visually by connecting to the checker.
Input Signal/Setting External input
Adjustment Method Check that the horizontal movement of ODS is 1 mm or less when
inputting a signal in the external input mode with no signal input.
2. Free run check
Input
6-4. ADJUSTMENT PROCEDURE AND METHOD OF MAIN PWB SIDE
1. Press the UP+DOWN key is pushed at the same time, and made power source on.
2. It moves to the special mode(SP MODE), and a BACKLIGHT(HI/LOW/OFF) key is pushed and turned off.
3. After setting is completed, a power source is turned off.
4. Again, a UP+DOWN key is pushed at the same time, and a power source is turned on and made special mode.
5. An INPUT/ DVD key is pushed, and it becomes adjustment mode.
6. Each operation in the adjustment mode changes as follows:
(1) Switch the adjustment block with the TILT key input.
(2) Perform paging of each adjustment block with the RETARN key.
(3) Switch each adjustment item with the menu key input.
(4) Change each adjustment value with the left or right cursor key.
DAC adjustment OPT adjustment BAT adjustment
TV1 TV2 TV3
GAM0
TV1 adjustment
TV2 adjustment
TV3 adjustment
SBRI GPOS CONT
WB-R WB-B SCOL STIN
COM OSDH BBRI GAM2

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1. DAC adjustment
(1) TV1 adjustment
Adjustment VR GAM0
Initial value "44" adjustment is unnecessary.
Adjustment VR SBRI
Adjustment Point ————
Input Signal/Setting It is set in "56".
Adjustment VR GPOS
Adjustment Point Connect the oscilloscope to COM output (6PIN of TP1901) and GND.
Input Signal/Setting Black-and-white 10STEP
Adjustment Method Adjust the common amplitude to 8.0±0.1Vp-p.
8.0±0.1Vp-p
Adjustment VR WB-R
Adjustment Point Connect the oscilloscope to 3PIN (VG) and 4PIN (VR) of TP1901.
Input Signal/Setting Black-and-white 10STEP
Adjustment Method Adjust the white balance (red) so that peak-peak the equal of green and red output become equal.
(2) TV2 adjustment
Adjustment VR WB-B
Adjustment Point Dual the oscilloscope to 3PIN (VG) and 5PIN (VB) and GND of TP1901.
Input Signal/Setting Black-and-white 10STEP
Adjustment Method Adjust the white balance (blue) so that peak-peak the equal of green and blue output become equal.
Adjustment VR SCOL
Adjustment Point Connect the oscilloscope to 5PIN (VB) and GND of TP1901.
Input Signal/Setting 100% color bar
Adjustment Method Adjust the blue amplitude of the color bar (black level to peak level) to 3.8±0.1Vpp.
Adjustment VR GAM2
Adjustment Point Connect the oscilloscope to 3PIN (VG) and GND of TP1901.
Input Signal/Setting Black-and-white 10STEP
Adjustment Method Adjust the Vpp of VG to 4.3±0.1Vp-p.
4.3±0.1Vp-p
Adjustment VR CONT
Adjustment Point Connect the oscilloscope to 3PIN (VG) and GND of TP1901.
Input Signal/Setting Black-and-white 10STEP
Adjustment Method Adjust the Vpp of VG to 3.3Vp-p.
3.3±0.1Vp-p
White level
Black level
Sync.