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PA
SERVICE MANUAL
NTSC DP25H/DP25K Chassis
CONTENTS
No. 0168
43F300:DP25K 53F300:DP25H
R/C: CLU-4321UG CLU-4324UG
TO GO TO A CHAPTER, CLICK ON ITS HEADING BELOW
IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 SERVICING PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 TECHNICAL CAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 CIRCUIT PROTECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 CAUTIONS WHEN CONNECTING/DISCONNECTING THE HV CONNECTOR . . . . . .12 GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 REMOTE CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 CUSTOMIZED PICTURE AND SOUND ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . .15 REAR PANEL CONNECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 DISPLAY PICTURE FORMATS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23 SERVICE ADJUSTMENTS . . . SERVICE PICTURE FORMATS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24 DISPLAY ADJUSTMENTS 27 PROTECTION CIRCUIT BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75 TROUBLESHOOTING FLOWCHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77 WAVEFORMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82 DC VOLTAGE TABLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93 BASIC CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108 PRINTED CIRCUIT BOARDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .128 BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .140 WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141 FINAL WIRING DRAWING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .142 EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .149 EXPLODED VIEW PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .153 REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .155 QUICK REFERENCE PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .175 DISASSEMBLY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .176 PWB Parts List Added ................................................................................................... 180 CAUTION: These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric shock do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so. Before servicing this chassis, it is important that the service technician read the "IMPORTANT SAFETY INSTRUCTIONS" in this service manual.
SAFETY NOTICE USE ISOLATION TRANSFORMER WHEN SERVICING Components having special safety characteristics are identified by a ! on the schematics and on the parts list in this Service Data and its supplements and bulletins. Before servicing the chassis, it is important that the service technician read and follow the "Important Safety Instructions" in this Service Manual.
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
PROJECTION COLOR TELEVISION
FEBRUARY 2003 Version 0168.01 HHEA-MANUFACTURING DIVISION
DP25H/K
IMPORTANT SAFETY INSTRUCTIONS USE ISOLATION TRANSFORMER WHEN SERVICING
Components having special safety characteristics are identified by a ! on the schematics and on the parts list in this service manual and its supplements and bulletins. Before servicing this chassis, it is important that the service technician read and follow the "Important Safety Instructions" in this Service Manual. For continued X-Radiation protection, replace picture tube with original type or Hitachi approved equivalent type.
This Service Manual is intended for qualified service technicians; it is not meant for the casual do-it-yourselfer. Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely repair complex products such as those covered by this manual. Improperly performed repairs can adversely affect the safety and reliability of the product and may void warranty. If you are not qualified to perform the repair of this product properly and safely, you should not risk trying to do so and refer the repair to a qualified service technician.
WARNING
Lead in solder used in this product is listed by the California Health and Welfare agency as a known reproductive toxicant which may cause birth defects or other reproductive harm (California Health and Safety Code, Section 25249.5).
When servicing or handling circuit boards and other components which contain lead in solder, avoid unprotected skin contact with solder. Also, when soldering do not inhale any smoke or fumes produced.
This television receiver provides display of television closed captioning in accordance with section 15.119 of the FCC rules.
FEDERAL COMMUNICATIONS COMMISSION NOTICE
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: · · · · Reorient or relocate the receiving antenna. Increase the separation between the equipment and the receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced radio/television technician for help.
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BACK TO TABLE OF CONTENTS
DP25H/K
IMPORTANT SAFETY INSTRUCTION
1. Before returning an instrument to the customer, always make a safety check of the entire instrument, including but not limited to the following items. a. Be sure that no built-in protective devices are defective and/or have been deleted during servicing. (1) Protective shields are provided on this chassis to protect both the technician and the customer. Correctly replace all missing protective shields, including any removed for servicing convenience. (2) When reinstalling the chassis and/or other assembly in the cabinet, be sure to put back in place all protective devices, including but not limited to, nonmetallic control knobs, insulating fishpaper, adjustment and compartment covers/shields, and isolation resistor/capacitor networks. Do not operate this instrument or permit it to be operated without all protective devices correctly installed and functioning. Servicers who defeat safety features or fail to perform safety checks may be liable for any resulting damage. b. Be sure that there are no cabinet openings through which an adult or child might be able to insert their fingers and contact a hazardous voltage. Such openings include, but are not limited to (1) spacing between the picture tube and cabinet mask, (2) excessively wide cabinet ventilation slots, and (3) an improperly fitted and/or incorrectly secured cabinet back cover. c. Antenna Cold Check With the instrument AC plug removed from any AC source, connect an electrical jumper across the two AC plug prongs. Place the instrument AC switch in the on position. Connect one lead of an ohmmeter to the AC plug prongs tied together and touch the other ohmmeter lead in turn to each tuner antenna input, exposed terminal screw and, if applicable, to the coaxial connector. If the measured resistance is less than 1.0 megohms or greater than 5.2 megohms, an abnormality exists that must be corrected before the instrument is returned to the customer. Repeat this test with the instrument AC switch in the off position. d. Leakage Current Hot Check With the instrument completely reassembled, plug the AC line cord directly into a 120V AC outlet. (Do not use an isolation transformer during this test.) Use a leakage current tester or a metering system that complies with American National Standards Institute (ANSI) C101.0 Leakage Current for Appliances and Underwriters Laboratories (UL) 1410, (50.7). With the instrument AC switch first in the on position and then in the off position, measure from a known earth ground (metal waterpipe, conduit, etc.) to all exposed metal parts of the instrument (antennas, handle bracket, metal cabinet, screw heads, metallic overlays, control shafts, etc.), especially any exposed metal parts that offer an electrical return path to the chassis. Any current measured must not exceed 0.5 milliamps. Reverse the instrument power cord plug in the outlet and repeat test.
DEVICE UNDER TEST
(READING SHOULD NOT LEAKAGE CURRENT BE ABOVE 0.5mA) TESTER
TEST ALL EXPOSED METAL SURFACES 2-WIRE CORD ALSO TEST WITH PLUG REVERSED (USING AC ADAPTER PLUS AS REQUIRED) EARTH GROUND
AC Leakage Test ANY MEASUREMENTS NOT WITHIN THE LIMITS SPECIFIED HEREIN INDICATE A POTENTIAL SHOCK HAZARD THAT MUST BE ELIMINATED BEFORE RETURNING THE INSTRUMENT TO THE CUSTOMER OR BEFORE CONNECTING THE ANTENNA OR ACCESSORIES. e. High Voltage This receiver is provided with a hold down circuit for clearly indicating that voltage has increased in excess of a predetermined value. Comply will all notes described in this Service Manual regarding this hold down circuit when servicing, so that this hold down circuit may correctly be operated. f. Service Warning With maximum contrast, operating high voltage in this receiver is lower than 30.5 kV. In case any component having influence on high voltage is replaced, confirm that the high voltage with maximum contrast is lower than 30.5 kV. To measure H.V. use a high impedance H.V. meter. Connect (-) to chassis earth and (+) to the CRT anode button. (See the following connection diagram.) Note: Turn power switch off without fail before the connection to the anode button is made.
Chassis ground
High Impedance H.V. meter
FBT (TH01) High voltage connector Deflection P.W.B.
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DP25H/K
IMPORTANT SAFETY INSTRUCTIONS
g. X-radiation TUBE: The primary source of Xradiation in this receiver is the picture tube. The tube utilized for the above mentioned function in this chassis is specially constructed to limit X-radiation emissions. For continued X-radiation protection, the replacement tube must be the same type as the original, Hitachi approved type. When troubleshooting and making test measurements in a receiver with a problem of excessive high voltage, avoid being unnecessarily close to the picture tube and the high voltage component. Do not operate the chassis longer than is necessary to locate the cause of excessive voltage. h. X-radiation Shield 1. This receiver is provided with X-ray shield plates for protection against X-radiation. Do not remove X-ray shield plates A, B, or C shown in Fig. 1 unnecessarily, when troubleshooting and/or making test measurements. 2. To prevent X-radiation, after replacement of picture tube and lens, confirm these components to be fixed correctly to bracket and cabinet, and not to be taken off easily.
Shield Plate A Glass Lens for Shielding
Shield Plate B
Shield Plate C Shield Plate C
Shield Plate D
Detailing X-radiation shield
Fig. 1. Installation of shield lens, shield cover and shield plates (oblique view). 4
DP25H/K
IMPORTANT SAFETY INSTRUCTIONS
2. Read and comply with all caution and safety-related notes on or inside the receiver cabinet, on the receiver chassis, or on the picture tube. 7. Components, parts, and/or wiring that appear to have overheated or are otherwise damaged should be replaced with components, parts, or wiring that meet original specifications. Additionally, determine the cause of overheating and/or damage and, if necessary, take corrective action to remove any potential safety hazard. 8. PRODUCT SAFETY NOTICE Many TV electrical and mechanical parts have special safety-related characteristics some of which are often not evident from visual inspection, nor can the protection they give necessarily be obtained by replacing them with components rated for higher voltage, wattage, etc. Parts that have special safety characteristics are identified in Hitachi service data by shading on schematics and by a ! in the parts list. Use of substitute replacement that does not have the same safety characteristics as the recommended replacement part in Hitachi service data parts list might create shock, fire, and/or other hazards. Product safety is under review continuously and new instructions are issued whenever appropriate. For the latest information, always consult the appropriate current Hitachi service literature. A subscription to, or additional copies of service literature may be obtained at a nominal charge from Hitachi.
3. Design Alteration Warning Do not alter or add to the mechanical or electrical design of this TV receiver. Design alterations and additions including but not limited to circuit modifications and the addition of items such as auxiliary audio and/or video output connectors, might alter the safety characteristics of this receiver and create a hazard to the user. Any design alterations or additions may void the manufacturer's warranty and may make you, the servicer, responsible for personal injury or property damage resulting therefrom.
4. Picture Tube Implosion Protection Warning The picture tube in this receiver employs integral implosion protection. For continued implosion protection, replace the picture tube only with one of the same type number. Do not remove, install, or otherwise handle the picture tube in any manner without first putting on shatterproof goggles equipped with side shields. People not so equipped must be kept safely away while picture tubes are handled. Keep the picture tube away from your body. Do not handle the picture tube by its neck.
5. Hot Chassis Warning a. Some TV receiver chassis are electrically connected directly to one conductor of the AC power cord and may be safely serviced without an isolation transformer only if the AC power plug is inserted so that the chassis is connected to the ground side of the AC power source. Confirm that the AC power plug is inserted correctly with an AC voltmeter by measuring between the chassis and a known earth ground. If a voltage reading in excess of 1.0V is obtained, remove and reinsert the AC power plug in the opposite polarity and again measure the voltage potential between the chassis and a known earth ground. b. Some TV receiver chassis normally have 85V AC (RMS) between chassis and earth ground regardless of the AC plug polarity. These chassis can be safely serviced only with an isolation transformer inserted in the power line between the receiver and the AC power source, for both personnel and test equipment protection. c. Some TV receiver chassis have a secondary ground system in addition to the main chassis ground. This secondary ground system is not isolated from the AC power line. The two ground systems are electrically separated by insulating material that must not be defeated or altered.
6. Observe original lead dress. Take extra care to assure correct lead dress in the following areas: a. near sharp edges, b. near thermally hot parts be sure that leads and components do not touch thermally hot parts, c. the AC supply, d. high voltage and e. antenna wiring. Always inspect in all areas for pinched, out-ofplate, or frayed wiring. Do not change spacing between components and the printed circuit board. Check AC power cord for damage. 5
DP25H/K
SERVICING PRECAUTIONS
CAUTION: Before servicing instruments covered by this service data and its supplements and addenda, read and follow the "Important Safety Instructions" on page 3 of this publication. NOTE: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions on page 3 of this publication, always follow the safety precautions. Remember: Safety First. General Servicing Guidelines 1. Always unplug the instrument AC power cord from the AC power source before: a. Removing or reinstalling any component, circuit board, module, or any other instrument assembly. b. Disconnecting or reconnecting any instrument electrical plug or other electrical connection. c. Connecting a test substitute in parallel with an electrolytic capacitor in the instrument. CAUTION: A wrong part substitution or incorrect polarity installation of electrolytic capacitors may result in an explosion hazard. d. Discharging the picture tube anode. 2. Test high voltage only by measuring it with an appropriate high voltage meter or other voltage measuring device (DVM, FETVOM, etc.) equipped with a suitable high voltage probe. Do not test high voltage by "drawing an arc." The H.V. Distribution Box has an internal 400M resistor (bleeder resistor) connected from the high voltage to ground. After power is removed from the instrument the high voltage will discharge through the high voltage bleeder resistor. If the tubes have high voltage after power is removed, then the bleeder resistor is defective or the bleeder ground is disconnected. 3. Discharge the picture tube's anode at any of the R, G, or B outputs on the H.V. Distribution Box only by (a) first connecting one end of an insulated clip lead to the degaussing or kine aquadag grounding system shield at the point where the picture tube socket ground lead is connected, and then (b) touch the other end of the insulated clip lead to the picture tube high voltage distribution box R, G, or B output, using an insulated handle to avoid personal contact with high voltage. 4. Do not spray chemicals on or near this instrument or any of its assemblies. 5. Unless specified otherwise in these service data, clean electrical contracts by applying the following mixture to the contacts with a pipe cleaner, cotton-tipped stick or comparable nonabrasive applicator: 10% (by volume) Acetone and 90% (by volume) isopropyl alcohol (90%99% strength). CAUTION: This is a flammable mixture. Unless specified otherwise in these service data, lubrication of contacts is not required. 6. Do not defeat any plug/socket B+ voltage interlocks with which instruments covered by this service data might be equipped. 6 7. Do not apply AC power to this instrument and/or any of its electrical assemblies unless all solid-state device heatsinks are correctly installed. 8. Always connect the test instrument ground lead to the appropriate instrument chassis ground before connecting the test instrument positive lead. Always remove the test instrument ground lead last. 9. Use with this instrument only the test fixtures specified in this service data. CAUTION: Do not connect the test fixture ground strap to any heatsink in this instrument. 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 fieldeffect transistors and semiconductor "chip" components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity. 1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, 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 desolder ES devices. 4. Use only can anti-static type solder removal device. Some solder removal devices not classified as "antistatic" can generate electrical charges sufficient to damage ES device. 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 device, 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
BACK TO TABLE OF CONTENTS
SERVICING PRECAUTIONS
General Soldering Guidelines 1. Use a grounded-tip, low-wattage soldering iron and appropriate tip size and shape that will maintain tip temperature within the range 500°F to 600°F. 2. Use an appropriate gauge of resin-core solder composed of 60 parts tin/40 parts lead. 3. Keep the soldering iron tip clean and well-tinned. 4. Thoroughly clean the surfaces to be soldered. Use a small wire-bristle (0.5 inch or 1.25 cm) brush with a metal handle. Do not use freon-propelled spray-on cleaners. 5. Use the following desoldering technique. a. Allow the soldering iron tip to reach normal temperature (500°F to 600°F). b. Heat the component lead until the solder melts. Quickly draw away the melted solder with an antistatic, suction-type solder removal device or with solder braid. CAUTION: Work quickly to avoid overheating the circuit board printed foil. 6. Use the following soldering technique. a. Allow the soldering iron tip to reach normal temperature (500°F to 600°F). b. First, hold the soldering iron tip and solder strand against the component lead until the solder melts. c. Quickly move the soldering iron tip to the junction of the component lead and the printed circuit foil, and hold it there only until the solder flows onto and around both the component lead and the foil. CAUTION: Work quickly to avoid overheating the circuit board printed foil or components. d. Closely inspect the solder area and remove any excess or splashed solder with a small wire-bristle brush.
DP25H/K
Removal 1. Desolder and straighten each IC lead in one operation by gently prying up on the lead with the soldering iron tip as the solder melts. 2. Draw away the melted solder with an anti-static suctiontype solder removal device (or with solder braid) before removing the IC. Replacement 1. Carefully insert the replacement IC in the circuit board. 2. Carefully bend each IC lead against the circuit foil pad and solder it. 3. Clean the soldered areas with a small wire-bristle brush. (It is not necessary to reapply acrylic coating to areas.) "Small-signal" Discrete Transistor Removal/Replacement 1. Remove the defective transistor by clipping its leads as close as possible to the component body. 2. Bend into a "U" shape the end of each of three leads remaining on the circuit board. 3. Bend into a "U" shape the replacement transistor leads. 4. Connect to replacement transistor leads to the corresponding leads extending from the circuit board and crimp the "U" with long nose pliers to insure metal to metal contact, then solder each connection. Power Output Transistor Devices Removal/Replacements 1. Heat and remove all solder from around the transistor leads. 2. Remove the heatsink mounting screw (if so equipped). 3. Carefully remove the transistor from the circuit board. 4. Insert new transistor in circuit board. 5. Solder each transistor lead, and clip off excess lead. 6. Replace heatsink. Diode Removal/Replacement 1. Remove defective diode by clipping its leads as close as possible to diode body. 2. Bend the two remaining leads perpendicularly to the circuit board.
Use Solding Iron to Pry Leads
3. Observing diode polarity, wrap each lead of the new diode around the corresponding lead on the circuit board. 4. Securely crimp each connection and solder it. 5. Inspect (on the circuit board copper side) the solder joints of the two "original leads". If they are not shiny, reheat them and, if necessary, apply additional solder.
IC Removal/Replacement Some Hitachi unitized chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent flat against the circuit foil. When holes are the slotted type, the following technique should be used to remove and replace the IC. When working with boards using the familiar round hole, use the standard technique as outlined in paragraphs 5 and 6 above.
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SERVICING PRECAUTIONS
Fuses and Conventional Resistor Removal/Replacement 1. Clip each fuse or resistor lead at top of circuit board hollow stake. 2. Securely crimp leads of replacement component around stake 1/8 inch from top. 3. Solder the connections. CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board, to prevent excessive component temperatures. Circuit Board Foil Repair Excessive heat applied to the copper foil of any printed circuit board will weaken the adhesive that bonds the foil to the circuit board, causing the foil to separate from, or "liftoff," the board. The following guidelines and procedures should be followed whenever this condition is encountered. In Critical Copper Pattern Areas High component/copper pattern density and/or special voltage/current characteristics make the spacing and integrity of copper pattern in some circuit board areas more critical than in others. The circuit foil in these areas is designated as Critical Copper Pattern. Because Critical Copper Pattern requires special soldering techniques to ensure the maintenance of reliability and safety standards, contact your Hitachi personnel. At IC Connections To repair defective copper pattern at IC connections, use the following procedure to install a jumper wire on the copper pattern side of the circuit board. (Use this technique only on IC connections.) 1. Carefully remove the damaged copper pattern with a sharp knife. (Remove only as much copper as absolutely necessary.) 2. Carefully scratch away the solder resist and acrylic coating (if used) from the end of the remaining copper pattern.
DP25H/K
At Other Connections Use the following technique to repair defective copper pattern at connections other than IC Pins. This technique involves the installation of a jumper wire on the component side of the circuit board.
DEFECTIVE COPPER REMOVED
Insulated Jumper Wire 1. Remove the defective copper pattern with a sharp knife. Remove at least 1/4 inch of copper, to ensure hazardous condition will not exist if the jumper wire opens. 2. Trace along the copper pattern from both wire sides of the pattern break and locate the nearest component directly connected to the affected copper pattern. 3. Connect insulated 20-gauge jumper wire from the nearest component on one side of the pattern break to the lead of the nearest component on the other side. Carefully crimp and solder the connections. CAUTION: Be sure the insulated jumper wire is dressed so that it does not touch components or sharp edges. Frequency Synthesis (FS) Tuning Systems 1. Always unplug the instrument AC power cord before disconnecting or reconnecting FS tuning system cables and before removing or inserting FS tuning system modules. 2. The FS tuner must never be disconnected from the FS tuning control module while power is applied to the instrument. 3. When troubleshooting intermittent problems that might be caused by defective cable connection(s) to the FS tuning system, remove the instrument AC power as soon as the defective connector is found and finish confirming the bad connection with a continuity test. This procedure will reduce the probability of electrical overstress of the FS system semi-conductor components.
BARE JUMPER WIRE
CRIMP AND SOLDER
Install Jumper Wire and Solder
3. Bend a small "U" in one end of a small-gauge jumper wire and carefully crimp it around the IC pin. Solder the IC connection. 4. Route the jumper wire along the path of the cut-away copper pattern and let it overlap the previously scraped end of the good copper pattern. Solder the overlapped area, and clip off any excess jumper wire.
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SERVICING PRECAUTIONS
DP25H/K
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 (surface mount)
Chip components must be replaced with identical chips due to critical foil track spacing. There are no holes in the board to mount standard transistors or diodes. Some chip capacitor or resistor board solder pads may have holes through the board, however the hole diameter limits standard resistor replacement to 1/8 watt. Standard capacitors may also be limited for the same reason. It is recommended that identical chip components be used. . Chip resistors have a three digit numerical resistance code -1st and 2nd significant digits and a multiplier. Example: 162 = 1600 or 1.6K resistor, 0 = 0 (jumper). Chip capacitors generally do not have the value indicated on the capacitor. The color of the component indicates the general range of the capacitance. Chip transistors are identified by a two letter code. The first letter indicates the type and the second letter, the grade of transistor. Chip diodes have a two letter identification code as per the code chart and are a dual diode pack with either common anode or common cathode. Check the parts list for correct diode number.
How to Replace Flat-lC --Required Tools--
· Soldering iron · iron wire or small awl · De-solder braids · Magnifier 1. Remove the solder from all of the pins of a Flat-lC by using a de-solder braid.
Flat-IC De-Solder Braid Soldering Iron
2. Put the iron wire under the pins of the Flat-lC and pull it in the direction indicated while heating the pins using a soldering iron. A small awl can be used instead of the iron wire.
Iron Wire Awl
Pull
Soldering Iron
Soldering Iron
3. Remove the solder from all of the pads of the Fiat-lC by using Soldering a de-solder braid.
Iron De-Solder Braid Flat-IC
Component Removal
1. Use solder wick to remove solder from component end caps or terminals. 2. Without pulling up, carefully twist the component with tweezers to break the adhesive. 3. Do not reuse removed leadless or chip components since they are subject to stress fracture during removal .
Chip Component Installation
1. Put a small amount of solder on the board soldering pads. 2. Hold the chip component against the soldering pads with tweezers or with a miniature alligator clip and apply heat to the pad area with a 30 watt iron until solder flows. Do not apply heat for more than 3 seconds Chip Components
TYPE
4. Position the new Flat-lC in place (apply the pins of the Flat-lC to the soldering pads where the pins need to be soldered). Properly Polarity Symbol determine the positions of the soldering pads and pins by correctly aligning the polarity symbol. 5. Solder all pins to the soldering pads using a fine tipped soldering iron.
C
GRADE
SOLDER CAPS
B E
TRANSISTOR
Solder
CAPACITOR 1ST DIGIT
Soldering Iron
COMMON CATHODE
2ND DIGIT MULTIPLIER = 1600 = 1.6K
6. Check with a magnifier for solder bridge between the pins or for dry joint between pins and soldering pads. To remove a solder bridge, use a de-solder braid as shown in the figure below.
De-Solder Braid Bridge Solder Soldering Iron
ANODES MH DIODE
SOLDER CAPS RESISTOR
9
DP25H/K
TECHNICAL CAUTIONS
High Voltage limiter circuit operation check. 1. Turn off TV and connect jig as shown in Figure 2. Adjust jig fully counter-clockwise for minimum resistance. 2. Set the AC input to 120V AC and turn on TV. 3. Confirm test pattern on CRT is a usable picture, then slowly adjust jig until the picture disappears and TV shuts down. 4. When the limiter circuit is operating properly, High Voltage will be less than 30.5 kV at 1.4mA when TV shuts down. 5. Turn off set immediately after checking circuit operation. 6. Unplug set for one minute to reset shutdown circuit. Remove jig and voltmeter.
(TH01)
AC CORD POLARITY This check is based on the UL standard. Use the jigs specified by the production technology section. The GND side (wider blade) of the AC power cord should be connected to K9Y1
R903 X901 R980 KP01 R901 C981 C901
PA 1 2
EF901 F901
EF901
WHITE side
GND side
TESTER
10
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DP25H/K
SPECIFICATIONS
Models: 43F300, 53F300 Cathode-Ray Tube: 43F300 R=P16LXS00RFA B G=P16LXS00HHA B B=P16LXS00BMB B 53F300 R=P16LXL00RFA U G=P16LXL00HHA U B=P16LXL00BMB U Power Input: 120 volts AC, 60 Hz Intermediate Frequency: Picture l-F Carrier 45.75 MHz Sound l-F Carrier 41.25 MHz Color Sub Carrier 42.17 MHz 1 Volt p-p, 75 Ohm 1 Volt p-p, 75 ohm
470 mVrms, 47 k Ohm 470 mVrms, 1 k Ohm
Video Input: Video Output:
Audio Input: Stereo Audio Output: Audio Output Power:
Power Consumption: · Stand-By Power 43F300 . . . . . . . . . . . . . . . . . . . . . . .0.96W 53F300 . . . . . . . . . . . . . . . . . . . . . . .0.96W · Power Consumption (operating) 43F300 . . . . . . . . . . . . . . . . . . . . . . .208W 53F300 . . . . . . . . . . . . . . . . . . . . . . .195W · Power Consumption (maximum) 43F300 . . . . . . . . . . . . . . . . . . . . . . .256W 53F300 . . . . . . . . . . . . . . . . . . . . . . .242W Antenna Impedance: 75 Ohm Unbalanced VHF / UHF / CATV BAND VHF UHF EXT. Mid CATV Mid. CATV Super CATV Hyper CATV Ultra CH 2~13 14~69 (A-5)~(A-1), 4+ A~I J~W (W+1)~(W+28) (W+29)~(W+84)
Front: 12 watts per channel at 10% distortion, 8 ohm Impedance. Max output 24 watts.
Anode Voltage: 30.2±0.3kv (1.32±0.2mA) DP25H/K Brightness: 43" 53" 2 180cd/m2 (white screen) 270cd/m Speakers: 43" 2 Woofers - 4 inch (10.2 cm) round.
53" 2 Woofers - 5 Inch (12.5 cm) round.
Receiving Channel:
Dimension: 43"
Height (in./mm) Width (in./mm) Depth (in./mm) Weight (Ibs.) 43 5/8 (1,108.0) 39 (989.2) 20 5/8 (523.9) 143.5
53"
51 5/8 (1,311.6) 46 (1,168.4) 25 1/4 (641.8) 239
Circuit Board Assemblies:
C.P.T. (B) P.W.B. C.P.T. (G) P.W.B. C.P.T. (R) P.W.B. Power Supply P.W.B. Control P.W.B. Sensor Distribution P.W.B. IR P.W.B. IR Sub P.W.B. Terminal P.W.B. Signal P.W.B. Def/Convergence P.W.B.
CIRCUIT PROTECTION
CAUTION: Example: Below is an EXAMPLE only. See Replacement Parts List for details. The following symbol near the fuse indicates fast operation fuse (to be replaced). Fuse ratings appear within the symbol.
F 6 A 125V
125V 6A
"RISK OF FIRE - REPLACE FUSE AS MARKED" 11
The rating of fuse F901 is 6A - 125V. Replace with the same type fuse for continued protection against fire.
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DP25H/K
CAUTIONS WHEN CONNECTING / DISCONNECTING THE HV CONNECTOR
Perform the following when the HV connector (anode connector) is removed or inserted for CPT replacement, etc.
Anode connector
Deflection P.W.B.
FBT
During Removal
1. 2. PUSH Roll out silicon cover from FBT's contact area slowly. While turning the connector about 90 degrees following the arrow (0 position), push the connector slightly towards the case. (Fig. A)
PUSH
Fig. A
Silicon cover
3.
Remove the connector slowly by pulling it away from the case.
Wing
Wing
L Position L Position
Fig. B
During Insertion
1. 2. 3. 4. Please refer to direction for insertion as shown in Fig. B (L position). Insert connector until "CLICK" sound is heard. Make sure the connector is pressed right in, so that it has a good contact with the spring. Confirm the contact by pulling the connector slightly. (Don't pull hard because it may damage the connector). Cover the high voltage output by carefully pushing silicon cover onto it. (Don't turn the connector). (REMARK) Make sure the silicon cover is covering the high voltage output. Silicon Cover less than 1mm
1.
12
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DP25H/K
GENERAL INFORMATION
PULL
POWER
S-VIDEO INPUT 5
-AUDIOVIDEO L/MONO R
MAGIC FOCUS
VOL-
VOL+
CH-
CH+
INPUT
MENU
EXIT CURSOR
SELECT
FRONT CONTROL PANEL
ANT A PR
INPUT 1
PB
Y
R TO CONVERTER
(MONO)/L
AUDIO
PR
INPUT 2
PB
Y/VIDEO
R
(MONO)/L
AUDIO
ANT B R
INPUT 3
(MONO)/L VIDEO
S-VIDEO
R
INPUT 4 AUDIO TO HI-FI
(MONO)/L VIDEO
S-VIDEO
R L
MONITOR OUT AUDIO
L
VIDEO
S-VIDEO
R
REAR PANEL JACKS
Antenna Input/Output Audio/Video Inputs 1, 2, 3 and 4 MONITOR OUT AUDIO TO HI-FI Output S-VIDEO Inputs 3 and 4 Component Input Y-PBPR
13
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DP25H/K
REMOTE CONTROL
POWER TV CBL/SAT DVD/VCR
PIP VIDEO
SWAP PIP MODE PIP CH
FREEZE
MENU
SELECT
MUTE
EXIT
LAST CH
VOL
CH
1 4 7
ANT
2 5 8 0
VID3
3 6 9
INFO
VID1
VID2
VID4
REC
VID5
ASPECT VIRTUAL HD
CLU-4321UG CLU-4324UG
14
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DP25H/K
CUSTOMIZED PICTURE AND SOUND ADJUSTMENTS
Video
Select VIDEO to adjust picture settings and improve picture quality.
Video Audio Ch. Manager Locks
Video
Picture Mode Contrast Sports 100% 50% 50%
CURSOR
Brightness Color
MENU
Setup Move
SEL
Sel
Tint Sharpness Vertical Position Magic Focus Color System Advanced Settings
Move
SEL
50% 0
Select
Use the CURSOR or to highlight the function to be adjusted. Press the CURSOR or to adjust the function. Press down on SELECT to select the function settings. Press MENU to return to main menu or select CURSOR to return to previous menu. Press EXIT to quit menu. Contrast Brightness Color Tint Sharpness Vertical Position Use this function to change the contrast between black and white levels in the picture. This adjustment will only affect the picture when ADVANCED SETTINGS DIMMER is OFF. Use this function to adjust overall picture brightness. Use this function to adjust the level of color in the picture.
Use this function to adjust flesh tones so they appear natural. Use this function to adjust the amount of fine detail in the picture. This function allows you to select when aspect style is either 4:3 ZOOM. Vertical position can be changed with this mode. Adjustable range is -10 (video center is toward bottom of screen) to +10 (video center is toward top of screen).
NOTES: 1. If CONTRAST is selected, you are adjusting CONTRAST. The additional menu items BRIGHTNESS, COLOR, TINT, and SHARPNESS can be selected and adjusted in the same manner. 2. It may be necessary to adjust TINT to obtain optimum picture quality when using the COMPONENT VIDEO Y-PBPR input jacks. 3. If you are using the COMPONENT VIDEO input jacks (Y-PBPR) and notice that the TINT and COLOR are abnormal, check to make sure that VIDEO- Color System is set properly.
15
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CUSTOMIZED PICTURE AND SOUND ADJUSTMENTS
Magic Focus Auto Digital Convergence Adjustment Please turn ON your television for at least 20 minutes before using this feature. The Magic Focus button will not work when Adjustment Mode is set to Manual (see page 17).
DP25H/K
Your HITACHI Projection TV has three color projection tubes: one for red, one for green, one for blue. When mixed together in the proper proportion, the output of these three color tubes can produce any color. To produce these colors, however, the beams must be precisely aligned over each other so that the colors can be mixed. The process of aligning these picture beams is called "convergence". Over a period of time, the picture tubes can drift out of alignment due to normal bumps and vibrations or moving the TV. If you move your TV, or if, after a time, you notice color rings or halos around objects in the picture, you may want to converge (align) the colors. Properly converged, the lines appear white, which is actually a combination of the outputs of the three color tubes. The output of the green tube is stationary. The outputs of the red and blue tubes can be adjusted. When properly aligned, the outputs of all three tubes should be directly over each other to produce the white lines. To simplify convergence, HITACHI incorporates a function called MAGIC FOCUS located on the front control panel, which allows the TV to self-adjust. Press this MAGIC FOCUS button and the convergence self adjustment will start and this process will take approximately 20 seconds. If this button is pressed during this process, no change in picture quality will occur. After this 20 second self-adjust period, picture quality will be optimum. (Do not move the TV during self-adjust.)
MAGIC FOCUS
MAGIC FOCUS
NOTE:
Only a momentary press of the MAGIC FOCUS button is necessary to start AUTO DIGITAL CONVERGENCE. At any time during this convergence correction process, you may press the MAGIC FOCUS button to exit the MAGIC FOCUS mode. However, the convergence correction process needs to be completed to SAVE the new corrected convergence data.
You may also select Magic Focus from the VIDEO menu.
Video Audio Ch. Manager Locks Setup
MENU
Setup
Magic Focus
Menu Preference
CURSOR CURSOR
SEL
Set The Clock Set The Channels Set The Inputs Set Event Timer Set Closed Captions About Your TV
Move
SEL
Move
Sel
Select
CURSOR
Setup
Magic Focus
Aligns the Red, Green, and Blue colors to correct for Magnetic Influences. Adjustment Mode Auto Manual If you want to adjust now
Move Return
CURSOR CURSOR
SELECT
MAGIC FOCUS
Start
SEL
16
CUSTOMIZED PICTURE AND SOUND ADJUSTMENTS
Manual Convergence Adjustment Mode NOTES: 1. 2.
DP25H/K
Please turn ON your television for at least 20 minutes before using this feature. Auto Adjustment Mode is recommended. If convergence is still not acceptable, use the Manual Adjustment Mode. DO NOT press MAGIC FOCUS or use Auto Adjustment Mode after using Manual Adjustment Mode.
Using the Remote Control, select SETUP-MAGIC FOCUS-MANUAL ADJUSTMENT MODE-START to access convergence crosshatch pattern. The adjustment point is indicated by the Adjustment Point Cursor. To Move Adjustment Point To move the Adjustment Point Cursor, use the CURSOR buttons. The Adjustment Point Cursor must be WHITE. Another way to move the Adjustment Point Cursor is to press the following buttons: [2] up, [4] left, [5] down, [6] right. If you use the number buttons while the adjustment point is WHITE, it will change to RED. To Change the Color of Adjustment Point Press the SELECT button repeatedly (WHITE-RED-BLUE-WHITE...). Green color is fixed and cannot be adjusted. To Adjust the Convergence Move the Adjustment Cursor to the point to be adjusted. Use the CURSOR , , GREEN (reference color). Properly aligned, all three colors should appear white.
Video Audio Ch. Manager Locks Setup
MENU
,
, buttons to match the RED and BLUE colors to
Setup
Magic Focus Menu Preference Set The Clock
CURSOR CURSOR
SEL
Set The Channels Set The Inputs Set Event Timer Set Closed Captions About Your TV
Move
SEL
Move
Sel
Select
CURSOR
Adjustment Point Cursor
Setup
Magic Focus
Aligns the Red, Green, and Blue colors to correct for Magnetic Influences. Adjustment Mode Auto Manual If you want to adjust now
Move Return
CURSOR CURSOR
SELECT
Start
SEL
If convergence is acceptable after Manual Convergence adjustment, press EXIT button to access menu mode.
DONE
EXIT
: [1] : [2] : [4]
CANCEL BACK
INI. RESET : [3]
Press the [1] button on the remote control to SAVE adjusted data and return to main picture. Press the [2] button on the remote control to CANCEL adjusted data and return to main picture. Press the [3] button on the remote control to recall the factory pre-set convergence data. Press the [4] button on the remote control to return to the manual convergence adjustment mode (crosshatch pattern). Press the [9] button on the remote control to read the SAVED adjusted data. If there is no saved data, pressing the [9] button will recall the factory pre-set data.
17
CUSTOMIZED PICTURE AND SOUND ADJUSTMENTS
DP25H/K
Audio
Select AUDIO to adjust the TV to your preference and to improve the sound quality.
Video Audio Ch. Manager Locks
MENU
Audio
Treble Bass Balance 50% 50% L R
CURSOR
Setup Move
SEL
CURSOR
Sel
SELECT
Sound Enhancement Advanced Settings
Move
SEL
Return
CURSOR
Audio Treble
Bass Balance Sound Enhancement Advanced Settings
Move
SEL
50% 50% L R
CURSOR
SELECT
Select
Treble
Next/Prev Change Value
50%
SEL
Return
Use CURSOR buttons to highlight functions. Press SELECT to select the function setting. Press CURSOR or to adjust the function. Press EXIT to quit MENU, or select Audio to return to the main menu. NOTE: If TREBLE is selected you are adjusting treble. The additional menu items Bass and Balance can be selected and adjusted in the same manner.
Treble
This function controls the high frequency audio to all speakers.
Bass
This function controls the low frequency audio to all speakers.
Balance
This function will control the left to right balance of the TV internal speakers and the AUDIO TO HIFI output.
18
DP25H/K
REAR PANEL CONNECTIONS
TYPICAL FULL-FEATURE SETUP
Outside antenna or cable TV coaxial cable
2-Way signal splitter
DVD Player
Y OUTPUT PB/CB PR/CR L
HDTV Set-Top Box
R
Y P B PR OUTPUT L R
VCR #1
ANT A PR
INPUT 1
PB
Y
ANT IN
OUTPUT
S-VIDEO
V
L
R
R TO CONVERTER
(MONO)/L
AUDIO
PR
INPUT 2
PB
Y/VIDEO
R
(MONO)/L
AUDIO
ANT B R
INPUT 3
(MONO)/L VIDEO
S-VIDEO
R
AUDIO TO HI-FI INPUT 4
(MONO)/L VIDEO
S-VIDEO
R L
MONITOR OUT
L
VIDEO
S-VIDEO
AUDIO
R
OUTPUT
INPUT
Cable TV Box
L R INPUT
S-VIDEO V
L INPUT
R
S-VIDEO V
L OUTPUT
R
VCR #2
Laserdisc player, VCR, camcorder, etc.
Stereo System Amplifier
NOTE:
1. Connect only 1 component to each input jack.
2. 3. 4. Follow connections that pertain to your personal entertainment system. Standard video signal (Composite Video) can be input to all video inputs (Video1~Video5). Cables are not included with the purchase of this television.
19
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DP25H/K
REAR PANEL CONNECTIONS
CONNECTING A STEREO SOURCE TO INPUT2~INPUT5 1. Connect the cable from the VIDEO OUT of the VCR or the laserdisc player to the INPUT (VIDEO) jack, as shown on the TV set below. 2. 3. 4. Connect the cable from the AUDIO OUT R of the VCR or the laserdisc player to the INPUT (AUDIO/R) jack. Connect the cable from the AUDIO OUT L of the VCR or the laserdisc player to the INPUT (AUDIO/L) jack. Press the VID2~VID5 button to view the program from the VCR or laserdisc player. The VIDEO label disappears automatically after approximately four seconds. Press the ANT button to return to the previous channel.
5.
ANT A PR
INPUT 1
PB
Y
R TO CONVERTER
(MONO)/L
AUDIO
PR
INPUT 2
PB
Y/VIDEO
R
(MONO)/L
AUDIO
ANT B R
INPUT 3
(MONO)/L VIDEO
S-VIDEO
R
INPUT 4 AUDIO TO HI-FI
(MONO)/L VIDEO
S-VIDEO
R L
MONITOR OUT
L
VIDEO
S-VIDEO
AUDIO
R
OUTPUT
R
L
V
VCR
NOTES:
1. Completely insert the connection cord plugs when connecting to rear panel jacks. The picture and sound that is played back will be abnormal if the connection is loose. 2. A single VCR can be used for VCR #1 and VCR #2, but note that a VCR cannot record its own video or line output. (INPUT: 3 in example on page 19) Refer to your VCR operating guide for more information on line input-output connections.
20
DP25H/K
REAR PANEL CONNECTIONS
CONNECTING AN S-VIDEO SOURCE TO INPUT 3, 4 AND 5 1. Connect the cable from the S-VIDEO OUT of the VCR or the laserdisc player to the INPUT (S-VIDEO) jack, as shown on the TV set below. 2. 3. 4. Connect the cable from the AUDIO OUT R of the VCR or the laserdisc player to the INPUT (AUDIO/R) jack. Connect the cable from the AUDIO OUT L of the VCR or the laserdisc player to the INPUT (AUDIO/L) jack. Press the VID3~VID5 button to view the program from the VCR or laserdisc player. The VIDEO label disappears automatically after approximately four seconds. Press the ANT button to return to the previous channel.
5.
ANT A PR
INPUT 1
PB
Y
R TO CONVERTER
(MONO)/L
AUDIO
PR
INPUT 2
PB
Y/VIDEO
R
(MONO)/L
AUDIO
ANT B R
INPUT 3
(MONO)/L VIDEO
S-VIDEO
R
INPUT 4 AUDIO TO HI-FI
(MONO)/L VIDEO
S-VIDEO
R L
MONITOR OUT
L
VIDEO
S-VIDEO
AUDIO
R
OUTPUT
R
L
V
S-VIDEO
VCR
NOTES:
1. Completely insert the connection cord plugs when connecting to rear panel jacks. The picture and sound that is played back will be abnormal if the connection is loose. 2. A single VCR can be used for VCR #1 and VCR #2, but note that a VCR cannot record its own video or line output. (INPUT: 3 in example on page 19) Refer to your VCR operating guide for more information on line input-output connections.
21
DP25H/K
REAR PANEL CONNECTIONS
CONNECTING A COMPONENT SOURCE TO INPUT 1 OR 2: Y-PBPR. 1. Connect the cable from the Y OUT of the Laserdisc/DVD player or HDTV set top box to the INPUT (Y) jack, as shown on the TV set at right. 2. 3. 4. 5. 6. Connect the cable from the CB/PB OUT or B-Y OUT of the Laserdisc/DVD player or HDTV set top box to the INPUT (PB) jack. Connect the cable from the CR/PR OUT or R-Y OUT of the Laserdisc/DVD player or HDTV set top box to the INPUT (PR) jack. Connect the cable from the AUDIO OUT R of the Laserdisc/DVD player or HDTV set top box to the INPUT (AUDIO/R) jack. Connect the cable from the AUDIO OUT L of the Laserdisc/DVD player or HDTV set top box to the INPUT (AUDIO/L) jack. Press the VID1~VID2 button, to view the program from the Laserdisc/DVD player or HDTV set top box. The VIDEO label disappears automatically after approximately four seconds. Press the ANT button to return to the previous channel.
7.
DVD Player
PR PB OUTPUT Y L R
ANT A PR
INPUT 1
PB
Y
R
(MONO)/L
TO CONVERTER
INPUT 2
PR
PB
Y/VIDEO
R
(MONO)/L
AUDIO
ANT B R
INPUT 3
(MONO)/L VIDEO
S-VIDEO
R
INPUT 4 AUDIO TO HI-FI
(MONO)/L VIDEO
S-VIDEO
R L
MONITOR OUT
L
VIDEO
S-VIDEO
AUDIO
R
NOTE:
Completely insert the connection cord plugs when connecting to rear panel jacks. The picture and sound that is played back will be abnormal if the connection is loose.
22
DP25H/K
DISPLAY PICTURE FORMATS
A.
24 23
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DP25H/K
25 24
DP25H/K
B.
26 25
DP25H/K
C.
26 27
DP25H/K
SERVICE ADJUSTMENTS
TO GO TO A SECTION, CLICK ON ITS HEADING BELOW
1. ASSEMBLED P.W.B ADJUSTMENT..................................................................................................................28 1-1. Service Menu Access (NTSC, SDTV and HDTV) ..................................................................................28 1-2. Comb Filter Operation Check ................................................................................................................48 1-3. Video Settings Check..............................................................................................................................48 1-3-1. Color Temperature Check ............................................................................................................48 1-3-2. Dimmer Check ..............................................................................................................................48 1-3-3. Auto Color Check..........................................................................................................................48 1-3-4. Noise Reduction Check ................................................................................................................48 1-3-5. Velocity Modulation Check ..........................................................................................................48 1-3-6. Black Level Expansion Check ......................................................................................................48 1-4. High Voltage Adjustment ........................................................................................................................49 2. FINAL ASSEMBLY ADJUSTMENT (Adjustment should be according to below order) ..............................49 2-1. Cut Off Adjustment ..................................................................................................................................49 2-2. DCU Phase Data Setting ......................................................................................................................49 2-3. Horizontal Position Adjustment (Coarse) ................................................................................................50 2-4. Raster Tilt (Deflection Yoke)....................................................................................................................50 2-5. Beam Alignment ......................................................................................................................................50 2-6. Raster Position........................................................................................................................................51 2-7. Vertical Size ..........................................................................................................................................51 2-8. Horizontal Size ......................................................................................................................................51 2-9. Beam Form ............................................................................................................................................52 2-10. Lens Focus..............................................................................................................................................52 2-11. Static Focus ............................................................................................................................................54 2-12. Digital Convergence ..............................................................................................................................54 2-12-1. Magic Focus Character Set Up ..................................................................................................55 2-12-2. Magic Focus Pattern Set Up ......................................................................................................56 2-12-3. Convergence Jig Screen Specification ......................................................................................57 2-12-4. Raster Position Adjsutment ........................................................................................................59 2-12-5. Convergence Point Adjustment ..................................................................................................59 2-12-6. Magic Focus Initialize ................................................................................................................60 2-13. Blue Defocus ..........................................................................................................................................61 2-14. White Balance ........................................................................................................................................61 2-15. Sub Brightness........................................................................................................................................63 2-16. Sub-Picture Signal Amplitude Adjustment ..............................................................................................64 2-17. Horizontal Position ................................................................................................................................65 2-18. Scanning Area Check ............................................................................................................................65 2-19. Raster Distortion Check ........................................................................................................................66 3. ADJUSTMENT POINT ........................................................................................................................................68 3-1. Signal Block Assembly............................................................................................................................69 3-2. Main Chassis Deflection P.W.B...............................................................................................................70 3-3. Power Supply P.W.B. ..............................................................................................................................71 3-4. CPT (R)(G)(B), Focus Pack ....................................................................................................................72 3-5. Control P.W.B. ........................................................................................................................................73
*IMPORTANT For many of the above adjustments, it is necessary to have an HDTV (1080i or 720P) signal generator, SDTV (480P) signal generator, as well as the usual NTSC (480i) signal generator. Hitachi recognizes that few companies offer HDTV or SDTV signal generators and that the cost of these generators is sometimes prohibitive. For this reason, we suggest the use of a set-top-box for HDTV and SDTV adjustments. Usually, there is a switch on the set-top-box which enables it to output HDTV (1080i or 720P) or SDTV (480P) signals even with no input. In this case, the sync is automatically detected by the TV (at the Y-PBPR Inputs on the rear panel). BACK TO TABLE OF CONTENTS
23 27
DP25H/K
1. ASSEMBLED P.W.B. ADJUSTMENT 1.1 Service Menu Access Adjustment Procedure (1) Press and hold INPUT key on Control Panel and then press POWER key on control panel to access I2C adjustment mode. (2) Receive signal on main picture. (NTSC, SDTV or HDTV). Some menu pages have I2C adjustments for SDTV and HDTV. The set will automatically allow you to set these items only when a SDTV or HDTV signal is input to the COMPONENT jacks on the back of the TV. See table below. (3) Check the OSD according to table on pages 29~32, using CURSOR , on Remote Control. *: Adjustable Data Others: Fixed Data (be careful not to change) (4) Press EXIT key to exit I2C ADJUST mode.
NOTE: (1) If the TV I2C data is different from the I2C Parameter (pages 29~32) for fixed data, change the data. (2) When exchanging microprocessor or EEPROM and TV is turned on for first time, it requires initialization of Memory Initial of I2C adjustment menu. (3) Use FACTORY RESET to set TV to out of factory shipping conditions: Do not use MEMORY INITIALIZE.
28
BACK TO ADJUSTMENTS
I2C Parameter List (1) Adjust Mode OSD Press INPUT + POWER of control panel.
BACK TO ADJUSTMENTS
CH U/D, INPUT CH U/D, INPUT ADJUST MODE MENU
Only adjust in cool mode. Only adjust in cool mode.
CUT OFF ADJUST MODE
INPUT + POWER
A
ADJUST MODE
XXXXXXXX
Press Select SUB BRT and press key Press EXIT key
to adjust
BRIGHTNESS 80
(DEFAULT)
SERVICE SUB BRIGHT* WHITE BALANCE G DRIVE (HIGH)* R DRIVE (HIGH)* R CUTOFF (HIGH)* G CUTOFF (HIGH)* B CUTOFF (HIGH) H POSITION* V POSITION* FACT RESET Select SERVICE and press key Press EXIT key SERVICE SUB BRT WHITE BAL G DRIVE (HIGH) R DRIVE (HIGH) R CUTOFF (HIGH) G CUTOFF (HIGH) B CUTOFF (HIGH) H POSITION V POSITION FACT RESET 3F 3F 7F 7F 7F 3F 3F
3F 3F 7F 7F 7F 3F 3F
MENU CH U/D, INPUT
SUB BRIGHT ADJ. MODE
VIDEO SETTINGS (1) CONTRAST : MIN (2) COLOR : MIN
29
Only adjust in cool mode.
ADJUST MODE
Select SERVICE and press key Press EXIT key
G DRV 3F R DRV 3F R CUT 7F G CUT 7F B CUT 7F
SERVICE SUB BRIGHT WHITE BALANCE G DRIVE (HIGH) R DRIVE (HIGH) R CUTOFF (HIGH) G CUTOFF (HIGH) B CUTOFF (HIGH) H POSITION V POSITION FACT RESET
48 37 7F 7F 7F 12 00
WHITE BALANCE ADJ. MODE
MENU
VIDEO SETTINGS (1) CONTRAST : MAX (2) COLOR,TINT,SHARP,BRIGHT:CENER (3) COLOR TEMP : COOL ADJUST to select the G DRV., (1) Press R DRV., R CUT, G CUT, B CUT. (Initial position G/B DRV). G/B DRV, B/R DRV select by the DR R and DR BG. (2) Press to adjust.
DP25H/K
1.2 I2C Parameter List Cont.
BACK TO ADJUSTMENTS
CH U/D, INPUT CH U/D, INPUT SELECT ADJUST MODE SERVICE SUB BRIGHT* WHITE BALANCE* G DRIVE (MEDUIM)* R DRIVE (MEDUIM)* R CUTOFF (HIGH)* G CUTOFF (HIGH)* B CUTOFF (HIGH) H POSITION* V POSITION* FACT RESET 50 55 7F 7F 7F 3F 3F SELECT 59 62 7F 7F 7F 3F 3F ADJUST MODE SERVICE SUB BRIGHT* WHITE BALANCE* G DRIVE (STD)* R DRIVE (STD)* R CUTOFF (STD)* G CUTOFF (STD)* B CUTOFF (STD) H POSITION* V POSITION* FACT RESET WARM, NTSC, STD ADJ MODE 1. Press to select the G DRV or R DRV. 2. Press select to change the COOL WARM NTSC COOL mode. Adjust on each mode, but cannot adjust on the COOL mode. 3. WARM and NTSC mode data is offset data based on the COOL mode data. SELECT MENU CH U/D, INPUT CH U/D, INPUT CH U/D, INPUT SELECT ADJUST MODE SERVICE SUB BRIGHT* WHITE BALANCE* G DRIVE (HIGH)* R DRIVE (HIGH)* R CUTOFF (HIGH)* G CUTOFF (HIGH)* B CUTOFF (HIGH) H POSITION* V POSITION* FACT RESET 3F 3F 80 80 80 3F 3F ADJUST MODE SERVICE SUB BRIGHT* WHITE BALANCE* G DRIVE (HIGH)* R DRIVE (HIGH)* R CUTOFF (HIGH)* G CUTOFF (HIGH)* B CUTOFF (HIGH) H POSITION* V POSITION* FACT RESET 3F 3F 80 80 80 3F 3F SELECT ADJUST MODE SERVICE SUB BRIGHT* WHITE BALANCE* G DRIVE (HIGH)* R DRIVE (HIGH)* R CUTOFF (HIGH)* G CUTOFF (HIGH)* B CUTOFF (HIGH) H POSITION* V POSITION* FACT RESET 3F 3F 80 80 80 3F 3F 1080i through mode Other Mode 1080i through mode
CH U/D, INPUT
ADJUST MODE SERVICE SUB BRIGHT* WHITE BALANCE* G DRIVE (HIGH)* R DRIVE (HIGH)* R CUTOFF (HIGH)* G CUTOFF (HIGH)* B CUTOFF (HIGH) H POSITION* V POSITION* FACT RESET
3F 3F 7F 7F 7F 3F 3F
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CH U/D, INPUT
ADJUST MODE SERVICE SUB BRIGHT* WHITE BALANCE* G DRIVE (HIGH)* R DRIVE (HIGH)* R CUTOFF (HIGH)* G CUTOFF (HIGH)* B CUTOFF (HIGH) H POSITION* V POSITION* FACT RESET
3F 3F 80 80 80 3F 3F
Other Mode
VD Position Adj Mode Press to adjust
H Position Adj Mode Press to adjust
DP25H/K
DP25H/K
1.2 I2C Parameter List
PIP ON/OFF key PIP Mode key
NORMAL mode
PIP mode
SURF mode (ANT A only)
MENU ADJUST MODE SUB CONT(TV-S) OSD POSITION AFC/CLOCK TEST MEMORY INIT I2COPEN IR BLASTER **
Press to select. Press to set to the initial data of each device.
CH U/D, INPUT
ADJUST MODE SUB CONT(TV-S) OSD POSITION AFC/CLOCK TEST MEMORY INIT I2COPEN IR BLASTER ** Select OSD POSI and press key. Press EXIT key. H POSI V POSI ** **
Press to select the H POSI, V POSI and press to adjust.
ADJUST MODE SUB CONT(TV-S) OSD POSITION AFC/CLOCK TEST MEMORY INIT I2COPEN IR BLASTER **
MENU
NOTE:
MEMORY INIT. will reset all devices to factory settings. Use factory reset from previous page to restore unit to factory settings condition.
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DP25H/K
1.2 I2C Parameter List Cont.
MENU
CH U/D, INPUT
DEVICE ADJUST MODE UPD64083 TA1340F TA1360N AUDIO FLEX DIGITAL MODULE V CHIP IR BLASTER ISF MODE
CH U/D, INPUT Select UPD64083 and press key. Press EXIT key.
Select FLEX and press key. Press EXIT key.
CH U/D, INPUT
DEVICE ADJUST No. DATA SYNCDET 00 F-STD 00 V-STD 00 H-STD 00 PUSH [SELECT] ADJ
MENU
UPD64083
DEVICE ADJUST No. DATA TVCINE 00 4X3DET 01 SN-DETH 00 SN-DETL 00 PUSH [SELECT] ADJ
FLEX
CH U/D, INPUT
Select DIGITAL MODULE and press key.
MENU
CH U/D, INPUT
Select TA1340F and press key. Press EXIT key.
DEVICE ADJUST No. DATA HSYNC-M 26 VSYNC-M 23 CSYNC-M 00 HSYNC-S 23 PUSH [SELECT] ADJ
TA1340F
Press EXIT key.
DEVICE ADJUST No. DATA PSTRAT 05 DIGITAL PEND 00 MODULE TEND 00 BLCLN 01 PUSH [SELECT] ADJ
MENU Select TA1360N and press key. Press EXIT key.
CH U/D, INPUT
Select V CHIP and press key.
MENU
CH U/D, INPUT
DEVICE ADJUST No. DATA RGBOUTO 00 SUB-BRT 7F G-DRV-H 3F G-DRV-M 50 PUSH [SELECT] ADJ
TA1360N
Press EXIT key.
DEVICE ADJUST No. DATA SMPLING 00 POLLING 0F START 02 TIMEOUT 05 PUSH [SELECT] ADJ
V CHIP
MENU Select AUDIO and press key. Press EXIT key.
CH U/D, INPUT
Select IR BLASTER AND press key.
MENU
CH U/D, INPUT
DEVICE ADJUST No. DATA BBE-LO 07 BBE-HI 05 AGC 01 SURR 00 PUSH [SELECT] ADJ
MENU
AUDIO
Press EXIT key.
DEVICE ADJUST No. DATA WAIT 03 IR REPEAT 20 BLASTER HFRQ-N 03 SYNCDET 00 PUSH [SELECT] ADJ
MENU Select ISF MODE and press key. Press EXIT key.
CH U/D, INPUT
DEVICE ADJUST No. DATA RGBOUTO 00 SUB-BRT 7F G-DRV-H 3F G-DRV-M 50 PUSH [SELECT] ADJ
ISF MODE
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DP25H/K
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DP25H/K
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BACK TO ADJUSTMENTS