Hitachi 37HLX99/DW2-H Service Manual
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Hitachi 37HLX99/DW2-H Service Manual

Hitachi 37HLX99/DW2-H Service Manual

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SERVICE MANUAL
N T S C
N T S C
A T S C
A T S C
SERVICE MANUAL REVISION HISTORY INFORMATION
DATE
Aug , 11
Sept, 20
Feb 06, 2007
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
AUGUST 2006
DW2-H
Chassis
REVISON #
SM00001
FIRST ISSUE OF MANUAL
SM00002
ADD INVERTER PWB PART No. PAGE 107,108
Removed reference to inverters on page 107 and 108.
CH 1
LCD DISPLAY PANEL
No. 0221
PA
37HLX99/DW2-H
R/C: CLU-3861WL
REASON
HHEA MANUFACTURING DIVISION

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  • Page 1 No. 0221 37HLX99/DW2-H SERVICE MANUAL DW2-H N T S C N T S C R/C: CLU-3861WL Chassis A T S C A T S C SERVICE MANUAL REVISION HISTORY INFORMATION DATE REVISON # REASON Aug , 11 SM00001 FIRST ISSUE OF MANUAL...

  • Page 2: Table Of Contents

    No. 0221 37HLX99/DW2-H SERVICE MANUAL N T S C DW2-H R/C: CLU-3861WL A T S C A T S C Chassis TO GO TO A CHAPTER, CLICK ON ITS HEADING BELOW CONTENTS SAFETY PRECAUTIONS ..........2 PRODUCT SAFETY NOTICE .

  • Page 3: Safety Precautions

    DW2U SAFETY PRECAUTIONS Comply with all cautions and safety-related notes NOTICE: Leakage Current Hot Check located on or inside the cover case and on the chassis or LCD Plug the AC line cord directly into a 120V AC outlet. (Do not use an module.

  • Page 4: Product Safety Notice

    For the latest information, always the module (glass-panel). consult the current HITACHI Service Manual. A subscription to, 3. Please do not stand the module with the edge of the glass- or additional copies of HITACHI Service Manuals may be panel on the table since this might result in damage to the obtained at a nominal charge from HITACHI Sales Corporation.

  • Page 5: Servicing Precautions

    DW2U SERVICING PRECAUTIONS CAUTION: Before servicing instruments covered by this Electrostatically Sensitive (ES) Devices service data and its supplements and addenda, read and Some semiconductor (solid state) devices can be damaged follow the “Important Safety Instructions” on page 3 of this easily by static electricity.
  • Page 6 5. Inspect (on the circuit board copper side) the solder joints IC Removal/Replacement Some Hitachi unitized chassis circuit boards have slotted of the two “original leads”. If they are not shiny, reheat holes (oblong) through which the IC leads are inserted and them and, if necessary, apply additional solder.
  • Page 7 2. Trace along the copper pattern from both wire sides of ensure the maintenance of reliability and safety standards, the pattern break and locate the nearest component contact your Hitachi personnel. directly connected to the affected copper pattern. At IC Connections 3.
  • Page 8 DW2U NOTE: These components are affixed with glue. Be careful not to break or damage any foil under the component or at the pins of the ICs when removing. Usually applying heat to the component for a short time while twisting with tweezers will break the component loose. Leadless Chip Components How to Replace Flat-lC (surface mount)
  • Page 9 DW2U Information for service about lead-free solder introduction Hitachi introduced lead-free solder to conserve the "Earth Environment". Please refer to the following before servicing. (1) Characteristic of lead-free solder Melting point of lead free solder is 40-50 C higher than solder containing lead.

  • Page 10: Agency Regulatory Information

    Modifications The FCC requires the user to be notified that any changes or modifications made to this device that are not expressly approved by Hitachi America ,Ltd. Home Electronics Division may void the user’s authority to operate the equipment. Cables Connections to this device must be made with shielded cables with metallic RFI/EMI connector hoods to maintain compliance with FCC Rules and Regulations.

  • Page 11: Acknowledgments And Trademarks

    DW2U ACKNOWLEDGMENTS AND TRADEMARKS This LCD Television complies with VESA DDC2B specifications, Plug & Play is a system with computer, peripherals (including monitors) and operating system. It works when the monitor is connected to a DDC ready computer that is running an operating system software that is capable for the plug & play. When a Plug and Play PC is powered on, it sends a command to the Monitor requesting identification.

  • Page 12: Introduction

    Digital AV Block and after processing, delivers the image to the display module. This HITACHI Service Manual is intended for the qualified service personnel and it contains the necessary information for troubleshooting the LCD television set in case of malfunction.

  • Page 13: Specifications

    DW2U SPECIFICATIONS FEATURES 2006 LCD model Model 37HLX99 Dimension Size 949.4mm x 725.7mm x 365mm Weight 29.2 kg Input AC Voltage AC108V~132V (with 3 Plug AC Power Cord i nlet A/C Input type ,1.8m length) Voltage Input AC Frequency 60Hz Power Consumption 169W, SBY/POD -SBY less than 1W/14W Front End(NTSC &...
  • Page 14 DW2U SPECIFICATIONS FEATURES Model 37HLX99 General Gamma Correction Only for Service Menu Function Picture Enhancer Input Signal Identification Audio Special Mode Power Save Mode With (On/Off) (Video In) Normal: Blue Power Save: Orange Stand by: Red Burning Protection With (Raster Shift:3 option.AII White Pattern) OSD Language (VIDEO) ENGLISH.FRANCAIS.ESPANOL Power Swivel...
  • Page 15 DW2U FEATURES QAM Basic Photo Model Name Class Chassis Series Cabinet Aspect ATSC ATSC/NTSC Digital MPEG Name Design 1Tuner Cable Decoder Guide 37HLX99 DW2C (ALL BLK) 16x9 Directors Memory Ucon Model Name Class NTSC Fill Shield Comb Resolution Color Temp FORMAT Pulldown Mode...
  • Page 16 DW2U General Specifications Environment Specifications Model Specifications 37HLX99 Item Specification Model Name Item Operating Temp. +5°C~+35°C Destination U.S.A. / CANADA Stock Temp. -15°C~+60°C Exterior Cabinet Dimensions Operating Humidity 20%~80%RH (Main Body) (Speaker & 9 4 9 . 4 m m x 7 2 5 . 7 m m x 3 6 5 m m stand inclusive) Stock Humidity 20%~90%RH...
  • Page 17 DW2U Display Specification Continuation Picture Format for Each Input Source Input Auto Aspect Aspect Aspect, Virtual HD, Black Side Panel, Vertical Position, PIP Mode Signal Aspect Video ID 16:9 16:9 16:9 Standard 1 Standard 2 Zoom Standard Expanded Zoom 1 Zoom 2 Input 4 1080i/720p...
  • Page 18 DW2U [Expansion] <4x3 Format> <16x9 Format> 4:3 Expanded Mode 16:9 16:9 16x9 Standard1 Standard1 162% Horizontal Expansion Ratio 16:9 16x9 Standard2 113% 16:9 16:9 16x9 Zoom Zoom Horizontal Position 16x9 Format Format Standard 100% 100% 16x9 Expanded Expanded Expanded Zoom1 162% 113% 162%...
  • Page 19 DW2U Aspect Key Operation (3) HDMI/YPBPR: 1080i/720p (1) ANT Analog Channel Aspect Aspect Aspect 16:9 16:9 16:9 16:9 Standard1 Standard2 Zoom Standard Standard1 Aspect Aspect Aspect Aspect Aspect Aspect Aspect 16:9 Expanded Zoom Zoom2 Zoom1 Expanded (2) ANT Digital Channel (4) HDMI/YPBPR: 480p/480i, Video/S-Video (a) Aspect: 16x9 (4-1) Auto Aspect OFF...
  • Page 20 DW2U Vertical Position Operation (b) Video ID/HDMI Info: Letter Input Vertical Position Aspect 16:9 16:9 Standard1/2 Zoom Standard Expanded Zoom 1 Zoom 2 Standard Expanded Video NTSC 0 step 10 step 0 step 10 step 10 step 10 step Analog Gray out ( 30 lines) Gray out...
  • Page 21 DW2U PIP Mode Digital Component/Composite/S-IN/HDMI POP Mode: Mode 1080i 720p 480p 480p 480i 480i 1080i 720p 480p 480p 480i 480i Main 16x9 16x9 16x9 16x9 16x9 16x9 16x9 16x9 Digital 1080i 16x9 (Air or 720p 16x9 Cable) 480p 16x9 480p 480i 16x9 480i...
  • Page 22 DW2U (1) PIP Key Operation (2) Freeze Operation Normal Viewing Main Frozen Freeze Exit Freeze Main Moving Frozen Freeze Freeze STROBE SPLIT (3) SWAP Operation Main Audio Audio 16x9 Main Audio Audio Exit Main Audio Audio PIP OFF PIP OFF (Note) If PIP Key is pushed from a Normal screen, PIP of Last Mode will be displayed.
  • Page 23 DW2U (4) Monitor Out (4-1) Set the Monitor out: Monitor out (4-2) Set the Monitor out: TV out Main Audio Audio Main Audio Audio Main Audio Audio Main Audio Audio Main Audio Audio Main Audio Audio Main Monitor Out Monitor Out Audio Audio Monitor Out...
  • Page 24 DW2U (4-3) At the time of reservation videotape recording Main (4) PIP Position Operation Audio Audio Main Audio Audio Main Audio Audio Monitor Out (Note) At the time of reservation videotape recording, the picture and sound of ANT is outputted from Monitor out. When Macrovision signal is included in the ANT Digital channel, monitor out is no picture and no audio.

  • Page 25: Basic Setup & Operation

    How To Set Up Your New Hitachi LCD Television To take measures to prevent the LCD Television from tipping over and prevent possible injury it is important to mount the unit in a stable and flat surface. Securing to a table-top ANTENNA 1.
  • Page 26 THIS SCREW 3 SCREWS STAND PLATE METAL TV STAND BASE Use the specified WALL MOUNT base for the LCD TV depending on the size of your TV. NOTE: Please access our web site at: www.hitachi.us/tv for recommended accessories for your tv.
  • Page 27 How to set up your new HITACHI LCD Television VIEWING The best picture is seen by sitting directly in front of the TV and about 10 to 18 feet from the screen. During daylight hours, reflections from outside light BEST may appear on the screen.
  • Page 28 Hook-up Cables and Connectors Most video/audio connections between components can be made with shielded video and audio cables that have phono connectors. For best performance, video cables should use 75-Ohm coaxial shielded wire. Cables can be purchased from most stores that sell audio/video products. Below are illustrations and names of common connectors.
  • Page 29 In addition to controlling all of the functions on your HITACHI LCD TV, the remote control is designed to operate different types of devices, such as, DVD Players, Cable Boxes (CBL), set-top-boxes, satellite receivers, PVRs/VCRs and audio devices. The remote control must be programmed to control the chosen device.
  • Page 30 Front/Rear/Side Panel Controls Firmly bind the cables. Thread the square Hook the band to the claw. hole with the band. SIDE POWER button Press this button to turn the LCD Television ON/OFF. It can also be turned ON/OFF by remote control.
  • Page 31 NOTES: Your HITACHI LCD TV will appear to be turned OFF (lights orange) if there is no video input when INPUT : 1, 2, 3, 4 and 5. Check the Power Light to make sure the TV is turned off or in Stand-by mode (lights red) when not in use.
  • Page 32 REAR PANEL CONNECTIONS Antenna Input To switch between Cable and Air input, go to the Channel Manager option to change the signal source CABLE or AIR. Audio/Video Inputs 1, 2, 3 and 4 By using the INPUTS button, the CURSOR PAD ( ), and the SELECT button or CURSOR PAD of the remote control, you can select each video source.
  • Page 33 Upgrade Card TV will display the following respective screens. This card slot is for future software upgrades. Hitachi will notify you if a software upgrade is required for your TV. In order to receive written notification, please complete and return your warranty card.
  • Page 34 Connecting External Video Sources The LEFT SIDE panel jacks are provided as a convenience to allow you to easily connect a camcorder , DVD, Video Game, VCR and a Digital Camera as shown in the following examples: INPUT 5 PHOTO PHOTO INPUT L/MONO...
  • Page 35 Connecting External Video Sources The RIGHT SIDE panel jacks are provided as a convenience to allow you to easily connect HDMI or DVI signals from a DVD, Set Top Box , Video Game as shown in the following examples (When connecting DVI signal it will need to connect the audio output into the Left Side Input jacks) : A) Connecting HDMI signal.
  • Page 36 CONNECTING EXTERNAL VIDEO SOURCES Outside Antenna Cable TV coaxial cable 2-Way signal splitter VCR #1 DIGITAL OUTPUT CAPABILITY OUTPUT S-VIDEO DIGITAL OUTPUT AUDIO OUT Optional HDMI HDMI HDMI Optional OUTPUT HDMI OUTPUT S-VIDEO S-VIDEO OUTPUT INPUT OUTPUT VCR #2 HDMI DIGITAL DVD Player HDTV Set-Top Box Laserdisc player, VCR,...
  • Page 37 TIPS ON REAR PANEL CONNECTIONS • S-VIDEO, Y-P B P R , or HDMI connections are provided for high performance laserdisc players, VCRs etc. that have this feature. Use these connections in place of the standard video connection if your device has this feature.
  • Page 38 BASIC OPERATION IMPORTANT NOTES No. Items Notes Arching sound from A buzzing sound might be heard when the LCD display LCD display monitor’s monitor is turned on in a very quiet room. This is due to panel. the LCD panel drive circuit when it is functioning. This arching sound is normal and it is not a malfunction.

  • Page 39: Adjustments

    DW2U ADJUSTMENTS TABLE OF CONTENTS TO GO TO A SECTION, CLICK ON ITS HEADING BELOW 1 Adjustment procedure start up....................39 1.1 How to get into adjustment mode ................39 1.2 Changing data and selecting adjustment code............39 2 Memory initialize ........................39 2.1 Memory initialize operation ..................39 2.2 Factory and service adjustments ................40 3 Video Adjustment ........................40 3.1 Sub-Contrast &...

  • Page 40: Adjustment Procedure Start Up

    2.1 MEMORY INITIALIZE OPERATION may be used as the adjustment keys. NOTE: The execution of this function returns the A. Use any Hitachi remote control when making an adjustment codes to the preset values, therefore, adjustment. adjustment data will be lost.

  • Page 41: Factory And Service Adjustments

    DW2U 3.12 525i Cb,Cr Clamp offset adjustment ·Process of Memory Initialize operation. Preparation ① A screen is be colored cyan when MEMORY INIT (1) Change signal format from 525(480)p to 525(480)i. (See Fig.2) start. A screen is be colored green when MEMORY INIT ②...

  • Page 42: White Balance Adjustment

    DW2U 4 WHITE BALANCE ADJUSTMENTS Remarks (1) Color temperature should be adjusted under the condition in which the screen is the brightest, thus General Notes for White Balance (1) If the incident illumination is more than 20 lux, the initial value for adjustment is set to its maximum. (2) Adjustment is made by reducing brightness only.

  • Page 43: Video Color Temperature Adjustment (Standard)

    DW2U 4.3 VIDEO COLOR TEMPERATURE ADJUSTMENT Remarks (STD) (1) Color temperature should be adjusted under the Preparation condition in which the screen is the brightest, thus (1) Same as “Video Color Temperature adjustment: the initial value for adjustment is set to its maximum. (HIGH)”.

  • Page 44: White Balance Adjustment Osd Flowchart Diagram

    DW2U 4.5 WHITE BALANCE ADJUSTMENT OSD FLOW DIAGRAM 4.5.1 Adjustment OSD Flowchart (1) Adjust Mode OSD JIG R/C code:9C or Press [MENU]+[MENU]+[8]+[SELECT] of Control panel. MENU MENU SELECT JIG Code CH U/D, INPUT CYAN* ADJUST MODE MEMORY INIT GREEN : Finish Normally FACT RESET Press →...
  • Page 45 DW2U 4.7.1 Adjustment OSD Flowchart (Cont.) CH U/D, INPUT Press ↑↓ to Select DRV Press ← → to adjust ADJUST MODE MEMORY INIT G DRV HIGH Press → key FACT RESET R DRV HIGH B DRV HIGH WHITE BAL HIGH WHITE BAL MED WHITE BAL STD WHITE BAL B/W CH U/D, INPUT...

  • Page 46: Screen Check

    AC cord and then all settings and data are updated. (7) When PDP turns ON , it will tune CH03 this is the complete operation of FACTORY RESET process. SIGNAL ASPECT SPEC(A,B) Hitachi circle pattern 0 +/- 0.5 16:9 Standard1 BACK TO ADJUSTMENTS...

  • Page 47: Settings For Delivery

    DW2U 8 . DATA TABLE OF SETTING FOR DELIVERY USER Control Initialization Settings for delivery (FACTORY RESET) l a i 37HLX99 Favorite Channels Not Registered t i s t i s Slideshow Interval 5 sec ) c i Contrast (White Level) 100% Brightness (Black Level) t n i...
  • Page 48 DW2U 8. SETTING for Delivery (continued) Function Initial Data Condition 37HLX99 Audio Treble Bass Balance CENT Surround Bass Boost Audio Source Stereo Analog Broadcast Internal Speakers Auto Noise Cancel Analog Broadcast Perfect Volume Loudness Language 1 [Unknown] Digital Output Dolby Digital Channel Manager Signal Meter Channel...
  • Page 49 DW2U 8. SETTING for Delivery (continued) Function Initial Data Condition 37HLX99 Setup Menu Preference Set The Language English Set The Menu Background Shaded Set The Screen Saver Main Picture Moving Option 1 Image Power Screen Wipe Automatic Power Saving Set The Inputs Input1 Rename None Input2 Rename...

  • Page 50: Osd Design Select

    DW2U 9 OSD Design Select Adjustment Preparation (1) Go to the Adjust Mode Menu. (2) Select “DEVICE” in the Adjust Mode Menu as follows. DEVICE menu (3) Press [ ] button to access the DEVICE menu. ADJUST MODE ADJUST MODE DEVICE ITEM DATA IR BLAST...

  • Page 51: Troubleshooting Flowcharts

    DW2U TROUBLESHOOTING FLOW CHARTS TROUBLE SHOOTING for DIGITAL MODULE (Device error check) Digital Main P.W.B has five LED on board. After Power ON these LED will be turned on in sequence. It may take a few seconds for the sequence. After Program is loaded without error, all LED will be turned off.
  • Page 52 DW2U TROUBLESHOOTING FLOW CHARTS LED5 LED4 LED3 LED2 LED1 Device Circuit No Remarks No Error Video/Audio of Cable/Air Digital Tuner Video/Audio of Cable/Air Analog Tuner MPEG(Seine2) Video/Audio of Cable/Air Graphics(Seine2) All OSD IEEE1394 IEEE1394 Video Decoder CCD etc. Audio DSP Audio cont.
  • Page 53 DW2U TROUBLESHOOTING FLOW CHARTS NO POWER (LED doesn't light) Is the input voltage applied to power supply unit? CN61 (1), (3) PINS AC Fuse AC inlet Power Switch F9A2 Filter PWB 6.3A/120V Is the input voltage applied to CN63 (1), (3) PINS and CNPPS (1),(7),(9), (15) pins of power supply unit? [CN63] 1.
  • Page 54 DW2U TROUBLESHOOTING FLOW CHARTS NO PICTURE OR NO PICTURE IN ANY DISTORTED PICTURE HDMI INPUT Is the input voltage applied DAMAGED to CN63 (1), (3) PINS and CHECK HDMI PHYSICAL CNPPS (1),(7),(9), (15) pins of CONNECTOR SOCKET? power supply unit? [CN63] 1.

  • Page 55: Block Diagrams

    DW2U CIRCUIT BLOCK DIAGRAM Drain Driver Module Timing Converter DC/DC Converter LVDS Receiver Back light unit Lamp ・ ・ ・ Panel Module BLoN VLCDoN Power CPUgo Supply Filter PWB PDPgo (LVDS) Unit Main Power2 Inlet Power SW Main-Digital PWB Photo Power1 POD PWB Side...
  • Page 56 DW2U POWER SYSTEM BLOCK DIAGRAM LCD Panel Module AC120V (+24V) (+12V) Filter PWB +24V +12V Power Supply Unit (LCD) (PFC) +12V +10.5V +5.6V STBY+3.3V STBY+5V +3.3V +3.3V +3.3V +1.3V +1.8V Reg. DC-DC DC-DC DC-DC Reg. Reg. Reg. Reg. Sync. +1.3V +2.5V +2.5V Audio DAC...
  • Page 57 DW2U AUDIO CIRCUIT BLOCK DIAGRAM IF15 NJU26107 IF20 Volume Mute Seine SN74LV Balance C244AP Bass/Treble IF10 IF12 Speaker L Surround WM8520 TPA3100 Bass Boost Digital Speaker R W/amp Power Amp.

  • Page 58: Connection Diagrams

    DW2U CONNECTION DIAGRAM TABLE OF CONTENTS...

  • Page 59: Final Wiring Diagram

    DW2U FINAL WIRING DIAGRAM TABLE OF CONTENTS...
  • Page 60 DW2U FINAL WIRING DIAGRAM...

  • Page 61: Quick Disassembly Guide

    DW2U QUICK DISASSEMBLE GUIDE (Back Cover 1) ① Remove Screw M3M 6*18 P#MJ03693(2 Pcs.) Wire Clamp M6 P#ML02111(2 Pcs.) ② Remove Screw M3D 4*10 P#MJ03727 ③ Remove Screw M3M 6*18 P#MJ03693(2 Pcs.) STAND METAL SUPPORT TABLE OF CONTENTS...
  • Page 62 DW2U QUICK DISASSEMBLE GUIDE (Back Cover 2) ① Remove Screw M3D 4*10 P#MJ03727(32 Pcs.) ② Remove Back Cover P#QD51156K...
  • Page 63 DW2U QUICK DISASSEMBLE GUIDE (Power Fan, Power Unit) ① Remove Screw M3E 3*8 P#MJ03467(2 Pcs.) Fan Metal Assy ② Remove Screw M3E 3*8 P#MJ03467(3 Pcs.) ③ Remove Power Fan P#GS00828 FAN METAL ASS'Y ④ Remove Fan Cushion P#NX31011(2 Pcs.) ⑤ Remove Screws : (5-1) Screw M3E 3*8 P#MJ03467 (3 Pcs.) (5-2) Screw M3D 3*8 P#MJ03646 (4 Pcs.) (5-3) Screw M3M 3*10 P#MJ03829 (2 Pcs.)
  • Page 64 DW2U QUICK DISASSEMBLE GUIDE (AV Block 1) ① Remove Screws: (1-1) M3E 3*8 P#MJ03467(3 Pcs.) (1-2) M3D 4*10 P#MJ03727(1 Pcs.) (1-3) M3C 4*10 P#MJ04061(1 Pcs.) Main Shield ② Remove Screw M3D 4*10 P#MJ03727 Cover Hold Metal COVER HOLD METAL...
  • Page 65 DW2U QUICK DISASSEMBLE GUIDE (AV Block 2) ① Remove Screw M3C 4*10 P#MJ04061(2 Pcs.) AV Block ② Remove Screw M3E 3*8 P#MJ03963(3 Pcs.) Power Button Ass'y AV BLOCK POWER BUTTON ASS"Y...
  • Page 66 DW2U QUICK DISASSEMBLE GUIDE (Terminal Metal) ① Remove Screw M3E 3*8 P#MJ03963(4 Pcs.) ② Remove Screw D-Sub P#MJ03351(2 Pcs.) ③ Remove Tuner Nut P#MK01432 Washer P#MK01511 ④ Remove Screw T2B 3*10 P#MJ03733(4 Pcs.) ⑤ Remove Screw M3E 3*8 P#MJ03963(4 Pcs.) ⑥...
  • Page 67 DW2U QUICK DISASSEMBLE GUIDE (POD PWB) ① Remove Screw M3E 3*8 P#MJ03963 ② Remove POD Metal POD PWB Ass'y P#JP50343...
  • Page 68 DW2U QUICK DISASSEMBLE GUIDE (Main, Sub PWB) ③ Remove Main PWB Assy 37HLX99 P#UX26034 ④ Remove Sub PWB Assy 37HLX99 P#JP50324 IS NECESSARY TO RELEASE MAIN PWB AND SUB PWB FROM BOARD HOLDERS(3 POSITIONS)

  • Page 69: Final Assembly Guide

    DW2U FINAL ASSEMBLY GUIDE TABLE OF CONTENTS...
  • Page 70 DW2U FINAL ASSEMBLY GUIDE...
  • Page 71 DW2U FINAL ASSEMBLY GUIDE...
  • Page 72 DW2U FINAL ASSEMBLY GUIDE...
  • Page 73 DW2U FINAL ASSEMBLY GUIDE...

  • Page 74: Waveforms

    DW2U WAVEFORMS Numbers inside circle correspond to locations shown in the circuit diagram. Waveforms taken using a Color Bar signal with H sync 31 khz and V. sync 60 hz and a X10 probe. ∆ Signal amplitude and DC level shown at and @ respectively.
  • Page 75 DW2U WAVEFORMS Numbers inside circle correspond to locations shown in the circuit diagram. Waveforms taken using a Color Bar signal with H sync 31 khz and V. sync 60 hz and a X10 probe. ∆ Signal amplitude and DC level shown at and @ respectively.

  • Page 76: Dc Voltages

    DW2U DC VOLTAGES Symbol Pin No. Voltage Symbol Pin No. Voltage Symbol Pin No. Voltage Symbol Pin No. Voltage CNLD2 24 V CN61 AC (L) CN63 PCM1 24 V 4.3 V 24 V AC (N) 3.3 V 24 V 24 V 3.1 V 5.1 V 3.3 V...
  • Page 77 DW2U DC VOLTAGES Symbol Pin No. Voltage Symbol Pin No. Voltage Symbol Pin No. Voltage IT05 IW03 IW04 Symbol Pin No. Voltage Symbol Pin No. Voltage IT11 UT01 Symbol Pin No. Voltage IWP2 Symbol Pin No. Voltage IT12 Symbol Pin No. Voltage IWP1 Symbol...

  • Page 78: Circuit Schematic Diagrams

    DW2U BASIC CIRCUIT DIAGRAM Sub 1 of 6 PRODUCT SAFETY NOTE: Components marked with a ! and shaded have special characteristics important to safety. Before replacing any of these components, read carefully the PRODUCT SAFETY NOTE of this Service Manual. Don't degrade the safety of the receiver through improper servicing. •...
  • Page 79 DW2U BASIC CIRCUIT DIAGRAM Sub 2 of 6 PRODUCT SAFETY NOTE: Components marked with a ! and shaded have special characteristics important to safety. Before replacing any of these components, read carefully the PRODUCT SAFETY NOTE of this Service Manual. Don't degrade the safety of the receiver through improper servicing. •...
  • Page 80 DW2U BASIC CIRCUIT DIAGRAM Sub 3 of 6 PRODUCT SAFETY NOTE: Components marked with a ! and shaded have special characteristics important to safety. Before replacing any of these components, read carefully the PRODUCT SAFETY NOTE of this Service Manual. Don't degrade the safety of the receiver through improper servicing. TERMINAL •...
  • Page 81 DW2U BASIC CIRCUIT DIAGRAM Sub 4 of 6 PRODUCT SAFETY NOTE: Components marked with a ! and shaded have special characteristics important to safety. Before replacing any of these components, read carefully the PRODUCT SAFETY NOTE of this Service Manual. Don't degrade the safety of the receiver through improper servicing. 200 pin I/F •...
  • Page 82 DW2U BASIC CIRCUIT DIAGRAM Sub 5 of 6 PRODUCT SAFETY NOTE: Components marked with a ! and shaded have special characteristics important to safety. Before replacing any of these components, read carefully the PRODUCT SAFETY NOTE of this Service Manual. Don't degrade the safety of the receiver through improper servicing. POWER SWIVEL •...
  • Page 83 DW2U BASIC CIRCUIT DIAGRAM Sub 6 of 6 PRODUCT SAFETY NOTE: Components marked with a ! and shaded have special characteristics important to safety. Before replacing any of these components, read carefully the PRODUCT SAFETY NOTE of this Service Manual. Don't degrade the safety of the receiver through improper servicing. UEI/IR BLASTER •...
  • Page 84 DW2U BASIC CIRCUIT DIAGRAM POD 1 of 1 PRODUCT SAFETY NOTE: Components marked with a ! and shaded have special characteristics important to safety. Before replacing any of these components, read carefully the PRODUCT SAFETY NOTE of this Service Manual. Don't degrade the safety of the receiver through improper servicing. •...
  • Page 85 DW2U BASIC CIRCUIT DIAGRAM Front HDMI 1 of 1 PRODUCT SAFETY NOTE: Components marked with a ! and shaded have special characteristics important to safety. Before replacing any of these components, read carefully the PRODUCT SAFETY NOTE of this Service Manual. Don't degrade the safety of the receiver through improper servicing. FRONT HDMI •...
  • Page 86 DW2U BASIC CIRCUIT DIAGRAM LED 1 of 1 PRODUCT SAFETY NOTE: Components marked with a ! and shaded have special characteristics important to safety. Before replacing any of these components, read carefully the PRODUCT SAFETY NOTE of this Service Manual. Don't degrade the safety of the receiver through improper servicing. •...
  • Page 87 DW2U BASIC CIRCUIT DIAGRAM OPT 1 of 1 PRODUCT SAFETY NOTE: Components marked with a ! and shaded have special characteristics important to safety. Before replacing any of these components, read carefully the PRODUCT SAFETY NOTE of this Service Manual. Don't degrade the safety of the receiver through improper servicing. •...
  • Page 88 DW2U BASIC CIRCUIT DIAGRAM FILTER 1 of 1 PRODUCT SAFETY NOTE: Components marked with a ! and shaded have special characteristics important to safety. Before replacing any of these components, read carefully the PRODUCT SAFETY NOTE of this Service Manual. Don't degrade the safety of the receiver through improper servicing. FILTER •...
  • Page 89 DW2U BASIC CIRCUIT DIAGRAM SIDE TERMINAL 1 of 1 PRODUCT SAFETY NOTE: Components marked with a ! and shaded have special characteristics important to safety. Before replacing any of these components, read carefully the PRODUCT SAFETY NOTE of this Service Manual. Don't degrade the safety of the receiver through improper servicing. SIDE TERMINAL •...
  • Page 90 DW2U BASIC CIRCUIT DIAGRAM CONTROL 1 of 1 PRODUCT SAFETY NOTE: Components marked with a ! and shaded have special characteristics important to safety. Before replacing any of these components, read carefully the PRODUCT SAFETY NOTE of this Service Manual. Don't degrade the safety of the receiver through improper servicing. CONTROL •...

  • Page 91: Printed Circuit Boards

    PRINTED CIRCUIT BOARDS DW2-U DW2-U SUB PWB (Component side) SEMICONDUCTOR LOCATION ( Component side) QT03 QT04 I004 QT05 I005 QT06 IL01 QT07 IM05 QY01 IP03 QY02 IP05 QY03 IPT1 IT02 DIODE IT03 IT04 D001 IT05 D006 IT07 DL01 IT09 DL02 IT10 DL03 IT11...
  • Page 92 PRINTED CIRCUIT BOARDS DW2-U DW2-U SUB PWB (Solder side) SEMICONDUCTOR LOCATION (Solde r side) I001 IM01 IM02 IM03 IM04 IM06 IM07 IM08 IT06 IT08 TRANSISTOR Q013 Q015 QM01 QM03 QM04 QM05 QP05 QPS1 QT01 QT02 DIODE DP09 DPS1 DPS2 DT02 DT03 DT04 CRYSTAL &...
  • Page 93 PRINTED CIRCUIT BOARDS DW2-U DW2-U POD PWB (Component side) SEMICONDUCTOR LIST ( Component side) IW02 IW03 IW04 IWP1 IWP2 DIODE DW01 DW02 CRYSTAL & FILTER XWP1...
  • Page 94 PRINTED CIRCUIT BOARDS DW2-U DW2-U POD PWB (Solder side) SEMICONDUCTOR LIST (Solder side) IW01 IWE1 IWE2 TRANSISTOR QW01 QWE1...
  • Page 95 PRINTED CIRCUIT BOARDS DW2-U DW2-U FRONT HDMI PWB SEMICONDUCTOR LIST (Component side) (Solder side) Component side IH02 Solder side IH01 IH03 IH04 IH05 DIODE DH01 DH02 TRANSISTOR QH01 QH02 QH03 QH04...
  • Page 96 PRINTED CIRCUIT BOARDS DW2-U DW2-U LED PWB SEMICONDUCTOR LIST (Component side) Component side IN01 IN02 (Solder side) Solder side DIODE DN01 DN02 HN01 HN02...
  • Page 97 PRINTED CIRCUIT BOARDS DW2-U DW2-U OPT PWB (Component side) (Solder side)
  • Page 98 PRINTED CIRCUIT BOARDS DW2-U DW2-U FILTER PWB (Component side) (Solder side) Component side FILTER X9A1 X9A2...
  • Page 99 PRINTED CIRCUIT BOARDS DW2-U DW2-U SIDE TERMINAL PWB (Component side) (Solder side) Component side TRANSISTOR QNJ1 QNJ2...
  • Page 100 PRINTED CIRCUIT BOARDS DW2-U DW2-U CONTROL PWB (Component side) (Solder side)

  • Page 101: Parts List

    DW2U REPLACEMENT PARTS LIST PRODUCT SERVICE NOTE: Components marked with a have special characteristics important to safety. Before replacing any of these components, read carefully, the PRODUCT SAFETY NOTICE of this Service Manual. Don’t degrade the safety of the receiver through improper servicing. ABBREVIATIONS Capacitors: Resistors:...
  • Page 102 DW2U PRODUCT SERVICE NOTE: Components marked with a have special characteristics important to safety. Before replacing any of these components, read carefully, the PRODUCT SAFETY NOTICE of this Service Manual. Don’t degrade the safety of the receiver through improper servicing. SYMBOL PART # DESCRIPTION...
  • Page 103 DW2U PRODUCT SERVICE NOTE: Components marked with a have special characteristics important to safety. Before replacing any of these components, read carefully, the PRODUCT SAFETY NOTICE of this Service Manual. Don’t degrade the safety of the receiver through improper servicing. SYMBOL PART # DESCRIPTION...
  • Page 104 DW2U PRODUCT SERVICE NOTE: Components marked with a have special characteristics important to safety. Before replacing any of these components, read carefully, the PRODUCT SAFETY NOTICE of this Service Manual. Don’t degrade the safety of the receiver through improper servicing. SYMBOL PART # DESCRIPTION...
  • Page 105 DW2U PRODUCT SERVICE NOTE: Components marked with a have special characteristics important to safety. Before replacing any of these components, read carefully, the PRODUCT SAFETY NOTICE of this Service Manual. Don’t degrade the safety of the receiver through improper servicing. SYMBOL PART # DESCRIPTION...
  • Page 106 DW2U PRODUCT SERVICE NOTE: Components marked with a have special characteristics important to safety. Before replacing any of these components, read carefully, the PRODUCT SAFETY NOTICE of this Service Manual. Don’t degrade the safety of the receiver through improper servicing. SYMBOL PART # DESCRIPTION...
  • Page 107 DW2U PRODUCT SERVICE NOTE: Components marked with a have special characteristics important to safety. Before replacing any of these components, read carefully, the PRODUCT SAFETY NOTICE of this Service Manual. Don’t degrade the safety of the receiver through improper servicing. SYMBOL PART # DESCRIPTION...
  • Page 108 DW2U PRODUCT SERVICE NOTE: Components marked with a have special characteristics important to safety. Before replacing any of these components, read carefully, the PRODUCT SAFETY NOTICE of this Service Manual. Don’t degrade the safety of the receiver through improper servicing. SYMBOL PART # DESCRIPTION...
  • Page 109 DW2U Quick Reference Parts List for Main Parts Main Side DC Fan Sub Digital Power AC Filter Front Control LCD Panel Digital POD PWB LED PWB Terminal Motor Supply HDMI PWB DD00861K GS00828 JP50764 JP50324 HA01801 JP50333 JP50343 X480409 X480410 X480411 X480412 NOTES:...

  • Page 110: Quick Reference Parts List

    DW2U QUICK REFERENCE PARTS LIST IC’S & UNITS No. Symbol Description Function PWB ASSY Remarks JP50764 PSA DW2-D MAIN-DIGITAL (37LCD) MAIN DIGITAL ASS'Y MAIN DIGITAL DN50 CC02061R LIGHT EMITTING DIODE SML-020ML RED/ORANGE LED DN51 CC01863R LIGHT EMITTING DIODE (SML012BC4T) BLUE LED F9A2 FN00475 FUSE 51MS 063 L-U 6.3A...

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