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Models: 36SDX88B
Chassis: MM1
Service Manual
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MM7 Chassis
1 R/C: CLU-433FC
SAFETY PRECAUTIONS.. ................................................................................................... .l PRODUCT SAFETY ............................................................................................................. .2 SERVICING PRECAUTIONS ............................................................................................... .4 AGENCY REGULATORY INFORMATION ........................................................................... .8 TECHNICAL SPEClFiCATlONS.. ......................................................................................... .9 TECHNICAL CAUTIONS ................................................................................................... .l 0 CONTENTS OF ADJUSTMENTS AND CIRCUIT DESCRIPTION.. ................................... .ll FRONT PANEL AND REMOTE CONTROL OPERATION ................................................. .14 INPUT SIGNAL TIMING ..................................................................................................... .41 .43 ADJUSTMENTS ................................................................................................................. CIRCUIT DESCRIPTIONS ................................................................................................. .91 TROUBLESHOOTING ..................................................................................................... .115 WAVEFORMS ................................................................................................................. .126 REPLACEMENT PARTS LIST ......................................................................................... .133 PRINTED CIRCUIT BOARDS ......................................................................................... .167 WIRING DRAWING ......................................................................................................... .175 WIRING DIAGRAM.. ......................................................................................................... .177 CHASSIS BLOCK DIAGRAM ........................................................................................... .178 BASIC CIRCUIT DIAGRAM ............................................................................................. .179 CAUTION: Before servicing this chassis, it is important that the service technician read the "Product Safety Notices" in this service manual.
SAFETY NOTICE USE ISOLATION TRANSFORMER WHEN SERVICING
Components having special safety characteristics are identified by a Aon 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 "Safety Precautions" and "Product Safety Notices" in this Service Manual.
SPECIFICATIONS DECEMBER 1998
AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT HHEA-MANUFACTURING DIVISION
SAFETY PRECAUTIONS
NOTICE: Comply with all cautions and safety-related notes located on or inside the cabinet and on the chassis or picture tube. WARNING: Since the chassis of this receiver is connected to one side of the AC power supply during operation, whenever the receiver is plugged in, service should not be attempted by anyone unfamiliar with the precautions necessary when working on this type of receiver. The following precautions should be observed: 1. Do not install, remove, or handle the picture tube in any manner unless shatterproof goggles are worn. People not so equipped should be kept away from the picture tube white handling. 2. When service is required, an isolation transformer should be inserted between power line and the receiver before any service is performed on a "HOT" chassis receiver. 3. When replacing a chassis in the receiver, all the protective devices must be put back in place, such as barriers, nonmetallic knobs, adjustment and compartment cover-shields, isolation resistors, capacitors, etc. 4. When service is required, observe the original lead dress in the high voltage circuitry area. 5. Always use the manufacturer's replacement components. Critical components as indicated on the circuit diagram should not be replaced by another manufacturer's. Furthermore, where a short circuit has occurred, replace those components that indicate evidence of overheating. 6. Before returning a serviced receiver to the customer, the senrice technician must thoroughly test the unit to be certain that it is completely safe to operate without danger of electrical shock, and be sure that no protective device built into the receiver by the manufacturer has become defective, or inadvertently defeated during servicing. Therefore, the following checks should be performed for the continued protection of the customer and service technician. Leakage Current Cold Check With the AC plug removed from the l2OV AC 60Hz source, place a jumper across the two plug prongs. Using an insulation tester (DC500V), connect one lead to the jumpered AC plug and touch the other lead to each exposed metal part (antennas, screwheads, metal overlays, control shafts, etc.), particularly any exposed metal part having a return path to the chassis should have a minimum resistor reading of 0.24MR and a maximum resistor reading of 12MQ. Any resistance value below or above this range indicates an abnormality which requires corrective action. An exposed metal part having a return path to the chassis will indicate an open circuit.
Leakage Current Hot Check Plug the AC line cord directly into a l2OV AC 60Hz outlet (do not use an isolated transformer for this check). Turn the AC power ON. Using a Leakage Current Tester (Simpson's Model 229 or equivalent), measure for current from all exposed metal parts of the cabinet (antennas, screwheads, overlays, control shafts, etc.) particularly any exposed metal part having a return path to the chassis or to a known earth ground (water pipe, conduit, etc.). Any current measured must not exceed 0.5 milliamps.
1
ALSO TEST WITH PLUG REVERSED (USING AC ADAPTER PLUS AS REQUIRED)
(READING SHOULD NOT BE ABOVE 0.5 mA)
AC LEAKAGE
TEST
ANY MEASUREMENTS NOT WITHIN THE LIMITS OUTLINED ABOVE ARE INDICATIVE OF A POTENTIAL SHOCK HAZARD AND MUST BE CORRECTED BEFORE RETURNING THE RECEIVER TO THE CUSTOMER. 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 with all notes described in this service manual regarding this hold down circuit when servicing, so that this hold down circuit is operated correctly. Serviceman Warning With minimum BRIGHTNESS and CONTRAST, the operating high voltage in this receiver is lower than 36.5kV. In case any component having influence on the high voltage is replaced, confirm that high voltage with minimum BRIGHTNESS and CONTRAST is lower than 36.5kV. To measure high voltage use a High Impedance High Voltage 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.
PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in HITACHI television receivers have special safety-related characteristics. These are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in this Service Manual. Electrical components having such features are identified with an A mark in the schematics and parts list in this Service Manual. The use of a substitute replacement component which does not have the same safety characteristics as the HITACHI-recommended replacement component, shown in the parts list in this Service Manual, may create shock, fire, X-radiation, or other hazards. Production safety is continuously under review and new instructions are issued from time to time. For the latest information, always consult the current HITACHI Service Manual. A subscription to, or additional copies of HITACHI Service Manuals may be obtained at a nominal charge from HITACHI Sales Corporation. formed repairs can adversely affect the safety and reliabi ity of the product and may void warranty. Consumers s h ould not risk trying to do the necessary repairs and should refer 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.
SAFETY NOTICE USE ISOLATION TRANSFORMER WHEN SERVICING
Components having special safety characteristics identified by A on the parts list in this service manual and its supplements and bulletins. Before servicing this product, it is important that the service technician read and follow the "Safety Precautions" and the "Product Safety Notices" in this Service Manual. For continued X-Radiation protection, replace picture tube with original type or HITACHI equivalent type.
CPT ANODE
HlGH IMPEDANCE
H.V. METER
1
CPT I . `CHASSIS GROUND
POWER SOURCE
This television receiver is designed to operate on 120 Volts/GOHz, AC house current. Insert the power cord into a 120 Volts/GOHz outlet. NEVER CONNECT THE TV TO OTHER THAN SPECIFIED VOLTAGE OR TO DIRECT CURRENT. THE
X-Radiation TUBE: The primary source of X-Radiation in this receiver is the picture tube. The tube utilized in this chassis is specially constructed to limit X-Radiation emissions. For continued XRadiation protection, the replacement tube must be the same type as the original HITACHl-approved type. When troubleshooting and making test measurements in a receiver with an excessive high voltage problem, avoid being unnecessarily close to the picture tube and the high voltage component. Do not operate the chassis longer than is necessary cause of excessive voltage.
to locate the
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 per-
3
SERVICING
PRECAUTIONS
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.
CAUTION: Before servicing instruments covered by this service data and its supplements and addenda, read and follow the SAFETY PRECAUTIONS on page 3 of this publication. NOTE: If unforseen 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 plug or other electrical connection. Connecting ic capacitor CAUTION: electrical
Electrostatically Sensitive (ES) Devices Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor "chip" components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity. 1. tmmediately 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. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge build-up or exposure of the assembly. Use only a grounded-tip devices. soldering iron to solder or desolder ES
C.
a test substitute in parallel with an electrolytin the instrument. A wrong part substitution or incorrect polarity installation of electrolytic capacitors may result in an explosion hazard. the picture tube anode.
2.
d. 2.
Discharging
Test high voltage only by measuring it wih 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." Discharge the picture tube's anode 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 output, using an insulated handle to avoid personal contact with high vottage. Do not spray chemicals assembties. on or near this instrument or any of its
3.
4. 3.
Use only an anti-static type solder removal device. Some solder removal devices not classified as "anti-static" can generate etectrical charges sufficient to damage ES device. Do not use freon-propelled electrical charges sufficient chemicals. These can generate to damage ES devices.
5.
6.
4. 5.
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 shot-ted together by conductive foam, aluminum foil or comparable conductive material.) 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. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ES device.)
Unless specified otherwise in these service data, clean electrical contacts 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) ispropyle alchohot (90%-99% strength). CAUTION: This is a flammable mixture. Unless specified otherwise in these service data, lubrication of contacts is not required. Do not defeat any plug/socket B+ voltage interlocks with which instruments covered by this service data might be equipped.
7.
8. 6.
7.
Do not apply AC power to this instrument and/or any of its electrical assemblies unless all solid-state device heat-sinks are correctly installed. Always connect the test instrument ground lead to the appropriate instrument chassis ground before connecting the test instrument positive tead. Always remove the test instrument ground lead last. 4
8.
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 parts tin/40 parts lead. Keep the soldering solder composed of 60
2.
Draw away the melted solder with an anti-static suction-type sol der removal device (or with solder braid) before removing the IC.
Replacement 1. Carefully 2. Carefully der it.
insert the replacement
IC in the circuit board.
bend each IC lead against the circuit foil pad and sol
3. 4.
iron tip clean and well-tinned. 3.
Thoroughly clean the surfaces to be soldered. Use a small wirebristle (0.5 inch or 1.25 cm) brush with a metal handle. Do not use freon-propelled spray-on cleaners. Use the following desoldering technique. a. Allow the soldering iron tip to reach normal temperature (5OO'F to 600°F). b. Heat the component lead until the solder melts. Quickly draw away the melted solder with an anti-static, suctiontype solder removal device or with solder braid. CAUTION: Work quickly to avoid overheating the circuit board printed foil.
Clean the soldered areas with a small wire-bristle brush. not necessary to reapply acrylic coating to areas.)
(It is
5.
"Small-signal'" Discrete Transistor Removal/Replacement 1. Remove the defective transistor by clipping its leads as close as possible to the component body. 2. 3. 4. Bend into a "U" shape the end of each of three leads remaining on the circuit board. Bend into a "U" shape the replacement transistor leads.
6.
Use the following soldering technique. a. Allow the sodering iron tip to reach normal temperature (5OOOF to 600°F). b. First, hold the soldering iron tip and solder strand against the component lead until the solder melts. 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 corn ponent lead and the foil. CAUTION: Work quickly to avoid overheating the circuit board printed foil or components. Closely inspect the solder area and remove any excess or splashed solder with a small wire-bristle brush.
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/Replacement 1. Heat and remove all solder from around the transistor 2. Remove the heatsink Carefully mounting screw (if so equipped). from the circuit board.
leads.
c.
3. 4. 5. 6.
remove the transistor
Insert new transistor Solder each transistor Replace heatsink.
in circuit board. lead, and clip off excess lead.
d.
Diode Removal/Replacement 1. Remove defective diode by clipping silbe to diode body. 2. Bend the two remaining board.
its leads as close as pos-
leads perpendicularly
to the circuit
3.
Observing diode polarity, wrap each lead of the new diode around the corresponding lead on the circuit board. Securely crimp each connection and solder it.
Use Soldering
iron to Pry Leads
4. 5.
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. 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. 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.
Fuses and conventional Resistor Removal/Replacement 1. Clip each fuse or resistor lead at top of circuit board stake. 2. Securely crimp leads of replacement l/8 inch from top. component around
hollow
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.
stake
3.
Solder the connections. Maintain original spacing between the replaced CAUTION: 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 "tift-off" 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 area 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 1C 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 used) from the end of the remaining copper pattern. (if 1.
Insulated
Jumper
Wire
Remove the defective copper pattern with a sharp knife. Remove at least l/4 inch of copper, to ensure hazardous condition will not exist if the jumper wire opens. 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. 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.
2.
3.
Frequency Synthesis (FS) Tuning Systems 1. Always unplug the instrument AC power cord before disconnetting 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 the power is applied to the instrument. 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.
3.
Install 3.
Jumper
Wire and Solder
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. Route pattern copper excess the jumper wire along the path of the cut-away copper and let it overlap the previously scraped end of the good pattern. Solder the overlapped area, and clip off any jumper wire.
4.
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 l/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-IC -Required Toolsl iron wire or small awl * Soldering iron l Magnifier l De-solder braids 1. Remove the solder from all of the pins of a Flat-IC by using a de-solder braid.
Flat-E
De-Solder Braid Soldering Iron
2.
Put the iron wire under the pins of the Flat-IC 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
Component
1. 2. 3.
Removal
3.
Use solder wick to remove solder from component end caps or terminals. Without pulling up, carefully twist the component with tweezers to break the adhesive. Do not reuse removed leadless or chip components since they are subject to stress fracture during removal.
Remove the solder IC by using a de-solder braid.
from all of the pads of the FlatSoldering Iron
00
00
v
h') --I(-
De-Solder Braid Flat-K
Chip Component
1. 2.
Installation
4.
Put a small amount of solder on the board soldering pads. 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
Position the new Flat-IC in place (apply the pins of the Flat-IC to the soldering pads where the pins need to be soldered). Properly determine the Polarity Symbol positions of the soldering pads and pins by correctly aligning the polarity symbol.
Chip Components
5.
Solder all pins to the soldering soldering iron.
pads using a fine tipped
TypEjjfs&;;;;
QyyR
IST DIGIT 2ND DIGIT
ANo@N
cATH;;;ER
cfg@
l"zY."K
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.
MH DIODE
RESISTOR
Bridge Solder
7
I
AGENCY REGULATORY INFORMATION
Federal Communications Commission Notice This equipment has been tested and found to comply with the limits for a Class 5 digital device, pursuant to Fart 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:
.
l l l
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 Consult the dealer or an experienced radio or television technician for help.
is connected.
Modifications The FCC requires the user to be notified that any changes or modifications made to this device that are not expressly by Hitachi Home Electronics (America), Inc. may void the user's authority to operate the equipment. Cables Connections to this device must be made with shielded with FCC Rules and Regulations. cables with metallic RFVEMI connector hoods to maintain
approved
compliance
Any cables that are supplied with the system must be replaced rules. Order Hitachi spares as replacement cables.
with identical
cables in order to assure compliance
with FCC
Declaration of Conformity This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Any cables that are supplied with the system must be replaced Order Hitachi spares as replacement cables. For questions regarding this declaration, Inc. contact: with identical cable in order to assure compliance with FCC rules.
Hitachi Home Electronics (America), 1855 Dornoch Court San Ysidro, CA 92173 l-800-448-2244 (I-800-HITACHI) ATTN: Customer Relations
TECHNICAL
PICTURE TUBE
36SDX88B/MMl ASOAG W 14X04 . . . . . . ..m......m..m........
SPECIFICATIONS
CAUTION! The following symbol near the fuse indicates fast operating fuse (to be replaced). Fuse ratings appear within the symbol. Example:
F901
VGA AND SVGA SPEClFlCATlONS
The rating of fuse F901 is 6.OA-125V. Replace with the same type fuse for continued protection against fire.
Inputs: Power Input ................. .AC 12OV, 60Hr + Power Consumption .................. 18OW l Power Consumption (maximum) ......... .24OW
l l . l l
TYPE MODE HORIZONTAL FREQUENCY F;E;$y /
VGA
l/PS2-1
VGA
2/PS2-2
SVGNPS2-3
800x600 1 37.879Khz
640X480 31.469Khz 1
640X480 37.861Khz
60.OOHz
1
72.809Hz
1
60.3tHz
SYNC TYPE Antenna input impedance ............ Channel coverage .................. VHF-Band ......................... UHF-Band ........................ CATV Mid Band .................. Mid Band ........................ Super Band ......................... Hyper Band ................... Ultra Band ................... .75 Ohm .I 81 ch. .2 - 13 .I4 - 69 .A-5 - A-l .A-I ..J- W .W+l - W+28 .W+29 - W+84 Ohm Ohm Ohm Ohm SYNC PoLARtTY H V
H/V TTL: TTL:
separate negative negative
H/V TfL: TTL:
separate negative negative
H/V
separate
PTL: positive TTL: positive
.
l l l
D-Sub Mini 15-Pin Connector Pin Assignments
Video input ................ .l.OVp-p, 75 S-Video input Luminance (Y) .............. .I .OVp-p, 75 Chrominance (CB,CR) . . . . . . .0.286Vp-p, 75 4 Audio input level (average) . .400mVrms, 47K
l l
outputs: . Audio Output (variable) . . . . . .400mVrms, 1 K Ohm l Video Output . . . . . . . . . . . . . . . .I .OVp-p, 75 Ohm Dimensions: l Height (in.) 2917/32 in. l Width (in.) 35 in. l Depth (in.) 2413/~~ in. . Weight (Ibs.) 164 Ibs.
NOTE:
Due to improvements,
specifications
in this operating
guide are subject to change
without notice.
9
TECHNICAL
HV Protection Hiah voltaqe Circuit Operation Checking
CAUTIONS
limiter circuit operation
check and over voltaae
protection
circuit operation
check.
Adjustment Preparation (1) Connect a high voltage voltmeter between CPT anode terminal (Anode cap side) and the ground as below. (2) Set AC input voltage to 120+2V. (3) Receive Hitachi circle pattern and set "Brightness" and "Contrast" to maximum. Adjust Screen VR so that Beam Current is le=l .15&O. 1 mA. (The voltage of ABL terminal-CH22 both ends should be 12V or less).
CPT
Mgh voltage voltmeter (DC voltage
dnrder)
Less 12v
than
CPT Wire
Ground
\
I Use the voltmeter of rnput impedence 1 Om ohm dr more wth lndtcatlon to the 1st decimal place.
Adjustment Procedure (1) Check that the normal High Voltage is 30.0+0.2KV and +B Voltage is 22O+lV. (2) Connect jig B to the both end of RH38 and check that power turn off and standby mode is set.
(3) Disconnect the AC plug and remove jig B. (4) Turn the main power on. Check if power is supplied and high voltage rises.
10
CONTENTS
Contents
l
Paqe #
and Circuit Control Description . . . . . . . . ..*........~*...................*.......................................*........................................... xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx ..x x xx xx xx xx xx xx Operation . . . . . ..*..............*.*.............................................................*...~..............".........".........*.... control for basic operation) ....................................................................................
of Adjustments Panel and Remote
Front 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13.
l
Front
Panel Controls
(refer to remote
Rear Panel Jacks
...................................................................................................................................................................... .......................................................................................................................................................... Your TV ..............................................................................................................................................
Rear Panel Connections The Remote Picture-in-PC Video Audio Theater To Control
..........................................................................................................................................................................
.......................................................................................................................................................................................... .......................................................................................................................................................................................... ...................................................................................................................................................................................... and Operation and Audio ...................................................................................................................................... ......................................................................................................................
PC Mode Connection PC Mode Controls PC Mouse Control
.................................................................................................................................................................... Input Operation .............................................................................................................................................................. ..................................................................................................................................................................
PC On-Screen Feature Timing
Display
Information
Input Signal Adjustment 1. 1. 2. 2.1 2.
.......................................................................................................................................................................... .................................................................................................................................................................... ........................................................................................................................................................ Procedure Start-up.. ............................................................................................................................ Code .................................................................................................................. Adjustment
l
Procedures
Main Chassis
Adjustment Adjustment Changing Assembly
Codes .................................................................................................................................................. Data and Adjustment Adjustment ...................................................................................................................................... ...................................................................................................................................... ...................................................................................................................................... Circuit (Q936). ...........................................................................
PWB Chassis 2.1 2.2 2.2.1 2.2.2 2.3 2.3.1 2.3.2 2.3.3 2.3.4 2.3.5 2.4 2.5 2.5.1 2.5.1 .l 2.5.1.2 2.5.2 2.5.3 2.6 2.6.1 2.6.2 2.7 2.7.1
Memory Initial Adjustment Power Circuit Adjustment +B Adjustment.. Operation Deflection Chopper
...................................................................................................................................................... Protection ................................................................................................................................ ................................................................................................................................ ............................................................................................................................ Check .................................................................................................................. Protection Circuit (QH03) ........................................................................
Check of +B Over-Current Circuit Adjustment Voltage Adjustment Phase Adjustment Limiter Operation
High Voltage Adjustment.. High Voltage High Voltage Operation
......................................................................................................................................
Check of +B Over-Current
AFC Operation Audio Operation MTS Operation Stereo/SA STEREO
Check ............................................................................................................................................ Check.. ........................................................................................................................................ Check.. .......................................................................................................................................... Receiving Check.. ................................................................................................................
Broadcast Separation
Check ..................................................................................................................................
SRS Operation BBE Operation
Check.. .......................................................................................................................................... Check.. ..........................................................................................................
. ............................... xx xx xx xx xx xx
OSD Check ............................................................................................................................................................ OSD Position Check .............................................................................................................................................. ............................................................................................................................................ OSD Size Adjustment Remote Operation Direct Channel
Check ...................................................................................................................................... 11
Selection.. ......................................................................................................................................
2.7.2 2.7.3 2.74 2.8 2.9 2.9.1 2.9.2 2.9.3 2.9.4 2.9.5 2.10 2.10.1 2.10.2 2.10.3 2.10.4 2.10.5 2.10.6 2.10.7 2.10.8 3. 3.1 3.1.1 3.1.1 .l 3.1.1.2 3.1 .1.3 3.1.1.4 3.1 -1.5 3.1 .1.6 3.1 .1.7 3.1 .1.8 3.1 .1.9 3.1.2 3.1.2.1 3.1.2.2 3.1.2.3 3.1.3 3.1.3-l 3.1.3.2 3.1.3.3 3.1.3.4 3.2 3.3 3.4 3.4 3.5
LST-CH .................................................................................................................................................................. MUTE .................................................................................................................................................................... RECALL ................................................................................................................................................................ Check ...............................................................................................................................
57 57 57 .58 59 59 59 59 60 60 61 61 62 62 63 63 64 64 65 66 66 67 -67 68 -69 70 71 72 .72 73 73 74 ..7 4 75 75 77 -77 .77 78 79 80 81
PC Control Operation Selection Power Channel Volume Operation
Check .................................................................................................................................... .............................................................................................................................................. ................................................................................................................................................
.................................................................................................................................................................... UP/DOWN UP/DOWN
Input Selection External
......................................................................................................................................................
Clock Set ................................................................................................................................................................ in I out Operation .................................................................................................................................... AV in / out Signal Check ........................................................................................................................................ Terminal Component Priority Check .......................................................................................................................................... Input Operation Check ...................................................................................................................... Check .................................................................................................................................... Check ......................................................................................................................................
PC Input Operation P in PC Operation
CATV Check .......................................................................................................................................................... Closed Caption Check .......................................................................................................................................... DPMS .................................................................................................................................................................... Adjustment .,,...............................................................,...,.................,".............................-,....~...~..............-... .............................................................................................................................. in PC Mode .......................................................................................................... ................................................................................................................... .............................................................................................................................. Adjustment ............................................................................................................. .................................................................................................... Deflection Deflection Horizontal Horizontal Vertical Vertical Trapezoid Pincushion System Adjustment System Adjustment
Final Assembly
Raster Center Adjustment Size and Position Linearity, Pincushion Adjustment Balance
Tilt and V Position Adjustment
Size and Position Adjustment
Adjustment
: ...........................................................................................................................
............................................................................................................................................ ................................................................................................................................... .............................................................................................................................................. ................................................................................................................................................ in TV Mode .......................................................................................................... ......................................................................................................................
Parallelogram
Adjustment..
Corner Adjustment Deflection Size, Position
System Adjustment
and Tilt Adjustment
Vertical Size Adjustment Other Geometry Deflection Horizontal Vertical
........................................................................................................................................ ................................................................................................................................ in DTV Mode ........................................................................................................ ................................................................................................................... ...................................................................................................................
Adjustment..
System Adjustment Size Position Size Adjustment
Tilt and Vertical Position
Adjustment Adjustment..
........................................................................................................................................ ................................................................................................................................ .................................................................................................................................... (1) .............................................................................................................................. (2) .............................................................................................................................. .................................................................................................................................. 12
Other Geometry
Adjustment..
Cut-off Coarse Adjustment Focus Adjustment White Balance White Balance Sub Brightness
..................................................................................................................................................
Adjustment Adjustment Adjustment
82 82
83
3.5.1 3.6 3.7 3.8 4. 5. 6. Settings
PC Mode.. .............................................................................................................................................................. Convergence Rotation For Shipping Check .............................................................................................................................................. VM Check .............................................................................................................................................................. Check ...................................................................................................................................................... ..............................................................................................................................................................
83 84 85 85 86 88 89 89 89 89 90 91 91
EDID Data .................................................................................................................................................................................. Adjustment 6.1 6.2 6.3 6.4 Circuit Descriptions Tuner Power 2.1 2.2 2.3 2.4 2.5 Point ...................................................................................................................................................................... / High Voltage PWB.. ............................................................................................................................ PWB.. ......................................................................................................................................................
Deflection Chopper
Power PWB.. .......................................................................................................................................................... Main PWB .............................................................................................................................................................. ..........................................................................................................................................................................
.
1. 2.
.......................................................................................................................................................................................... Supply .............................................................................................................................. Features Standby Switching Voltage Operation Operation Regulation ............................................................................................................................................................... ............................................................................................................................................... .............................................................................................................................................. ................................................................................................................................................
I.. ......................................... 92 .92 .92 92 92 92 93 95 95 96 98 98 .99 101 102 103
1901 Protection Circuit Diagram
...................................................................................................................................................... ........................................................................................................................................................ ...................................................................................................................................... ........................................................................................................................................ ................................................................................................................................................
. Power 3.
Supply 3.1 3.2
Microprocessor
1001 Pin Description 1001 Pin Functions Closed Caption
System
4.
Memory 4.1 4.2
...................................................................................................................................................................................... M24C16-BNG 24LC21A/P ........................................................................................................................................................ ........................................................................................................................................................... Proposed by VESA .......................................................................................................... IMOI ............................................................................................................................................ ........................................................................................................................................
.
Display
Operation
per DDC Standard Microcomputer / RGB Processing
5. 6. 7. 8. 9. 10.
PC Mouse
Video / Chroma Sync. Signal Vertical Horizontal 10.1 10.2 10.3 10.4
Processing Output
and Horizontal
104 I ...................................................................................................................................................... ............* . 105 Drive .................................................................................................................................... .................................................................................................................................................. / HV Circuit / Dynamic Focus Circuit Operation ........................................................ .................................................................................................................................................... Circuit ...................................................................................................................................... ........................................................................................................................ 106 107 107 i 07 108 108 108 109 ,110 111 .I12 112 113
Operation
HV Regulation
/ Raster
Centering
HV Regulation.. Raster Centering
HV Circuit ............................................................................................................................................................ Dynamic Operation Processing Comb Focus Circuit Operation
11. 12. 13. 14. 15. 16. 17.
VM Circuit
.............................................................................................................................................................. .................................................................................................................................................. .......................................................................................................................................................
MTS Decoding Audio Signal
(FE-VRSOSR)
3 Dimension MM1 Video Major
Filter Unit (3D Y/C) ................................................................................................................................ IC ................................................................................................................................................... ................................................................................................................................................
MM1 1% Bus Controlled
Flow ...................................................................................................................................................................... Functions
Components
13
\
+E= w &zLl
FRONT PANEL CONTROLS
FRONT VIEW
r r
lnmMslmDIGITAL
1
HITACHI
tNPUT h&i" EQT 2
-
VOL ;
+ $
-
Cl-i T
+
POWER o
k&JEXIT
I
I
I
I J
CURSOR
r L.
PC RGB INPUT 2
I ,
/
69 LED
i
I
@ PC MOUSE
INFRARED SENSOR
I
@
PC RGB Input 2
14
REAR PANEL JACKS
REAR VIEW 0
PC RGB INPUT 1
*hT LA
PC AUDIO INPUT
01
2 0
Antenna Inputs The VHF/UHF terminal
can be used for normal TV, cable TV (CATV), a video game, etc.
Audio/Video Inputs 1,2 The INPUT button will step through each signal source input each time it is pressed. Use the audio and video inputs to connect external devices, such as VCRs, camcorders, laserdisc players,DVD players etc. (tf you have mono sound, insert the audio cable into the left channel jack.) S-Video 1,2 Input provides
3 0 @ 5 0
S-Video
(Super Video) jacks for connecting Input 2 jacks for connecting
equipment
with S-Video
output capability.
Component: Y-CBCRPI-PBPR Input 2 provides Y-CBC#-PBPR
equipment
with this capability,
such as a DVD player.
Monitor Out These jacks provide fixed audio and video signals which are used for recording. There is NO MONITOR OUT when using COMPONENT VIDEO. Audio to Hi-Fi These jacks provide variable audio output to a separate stereo be controlled by the PC ready color television's main volume. nels. NOTE: The mini DIN 6 Pin Keyboard model. terminal underneath
6 0
amplifier. With this connection, the audio to the stereo can Use these jacks for the SURROUND Left and Right chan-
7 0
the PC Control
at rear panel does not work on this
8 0
PC Control Use this input for remote control mouse operation. PC Audio Input Connect external PC RGB Input Use this 15pin devices for audio in PC mode. 1 (RGBI) D-Sub Input for your PC connection.
9 0
@
15
-43 t-l -
REAR PANEL CONNECTIONS
-cable
Outside antenna or TV coaxial cable
f----------
P-Way signal splitter 2-Way signal splitter
VHF/UHF
fB
PC AUDIO INPUT PC CONTROL
I
AUDIO TO HI FI
I
Ill
INPUT 2 L and R
I I
VCR #2
1,)
: I Laserdrsc ptayer, VCR, camcorder, etc. DVD Player, Laserdisc player, etc. Stereo System Amplifier HOTV SET-TOP BOX
I NOTE:
Connect
only 1 component
to each input jack.
I
16
THE REMOTE TO CONTROL YOUR TV
..v * *+* @
3
0
POWER
(F-j
HELP
(,,,,,) (z)
PiPC TV/VCR
POSITION
SIZE
REC
,
PAUSE
0
c""`J
0
6 v d
LST-Cl-i
MUTE L I G
EXIT
CURSOR
CONTROL
HITACHI
CLU433FC
17
PlCTlJRE4N-PC
Your PC ready color TV incorporates PinPC technology designed for improved viewing enjoyment. while viewing other
The Picture-in-PC feature is convenient when you want to watch a program. programs from Antenna, Video and component input sources. PC input sources can only be viewed as a main pictures. Antenna, Video and component inputs can be viewed as the sub-picture.
You can watch your PC operation
Outside antenna or cable TV coaxial cable
@-
{W)
VGA&VGA
PC AUDIO INPUT PC CONTROL @+AUDIO OUT
MOUSE
PORT
1
I
INPUT 2 L and d
/
MUlTIMEDIA
PC
: :
DVD Player Laserdisc player, etc.
Laserdisc player, VCR, camcorder, etc.
HDTV SET-TOP BOX
PiPC Button Press the PiPC Button and a Sub-Picture @ Input Button Press Input to change Sub-Picture
wiH appear. This PiPC works only on PC mode.
Input Source.
NOTE: When PiPC is on Antenna Source, press channel A, V to change channel or use number button.
18
PICTURE-IN-PC
/ Main Picture
' Sub Picture u-arw)
\ Sub Picture (Small)
It is also possible to customize the PiPC position. To do this, wait until the On-Screen Display disappears use the CURSOR ,, 4 buttons. Press CURSOR A, 7 to select Audio Input source to TV or PC mode.
(about eight seconds)
and then
EXIT
I
NOTE: PinPC works correctly when receiving the following signal timings, horizontal and vertical position of PinPC may not work correctly with other timings.
I
Signal VGA VGA SVGA
Resolution 640x480 640x480 800x600
Horizontal Freq. (kHz) 1 31.5 37.6 f 37.6 1
Polarity Negative Negative Positive
Vertical Polarity Freq. (Hz) Negative 60 Negative 72 60 Positive
NOTE: Component input with High Definition (1080 1) and Standard Definition (480P) Digital signals do not show up on the PinPC sub-picture because digital decoding is only for the main picture.
I
I
NOTE: If PinPC is activated, the remote control mouse operation does not work. Use the PC mouse for control instead of the remote control mouse.
19
VIDEO
Select VIDEO to adjust picture settings and improve picture quality.
MENU
IT0
MENU
BAR
TO QUIT
1 EXIT
MENU
IT0
MENU
BAR
TO QUIT
1 EXIT
Use the CURSOR A or v buttons to highlight the function to be adjusted. Press the CURSOR 4 or F buttons to adjust the function. Press EXIT to quit menu, or CURSOR 4 to return to previous menu.
NOTE:
l
l
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. Contrast and Brightness adjustments will affect only the main picture. These adjustments will not affect the sub-picture.
I I
I
1 1
CONTRAST
I 1
Use this function
to change
the contrast between
black and white levels in the picture.
BRIGHTNESS
Use this function
to adjust overall
picture brightness.
COLOR I Use this function
TINT SHARPNESS
to adjust the level of color in the picture.
1 Use this function to adjust flesh tones so they appear optimum picture quality when using the COMPONENT:
natural. (It may be necessary to adjust TINT to obtain Y-PBPRN-CBCR Input 2 jacks).
1 Use this function to adjust the amount of fine detail in the picture. When RESET is selected, the "ARE YOU SURE?" display will appear on the screen to confirm Press CURSOR F to return VIDEO adjustments to factory preset conditions. your choice.
20
VIDEO
I
I
ADVANCED SElTlNGS
1 Your PC ready color TV has the following quality picture possible.
functions
which will adjust picture settings to produce
the highest
CONTRAST BRIGHTNESS
4 -b
100%
ADVANCED
MENU
IT0
MENU
BAR
TO QUIT
1 EXIT
I
ADVANCED *es
SETTINGS
CURSOR
c
ADVANCED
SETTINGS
DYC 0 3D VIDEO DISC 0 AUTO COLOR COLOR TEMPERATURE 0 COOL 0 WARM COMPONENT SET TO QUlT 1 EXIT
q q
3 DYC 3D VlDEO DISC 0 AUTO COLOR COLOR TEMPERATURE 0 COOL @WARM COMPONENT SET TO QUIT 1 EXIT
*
MENU I IT0
i MIENU
IT0
MENU
BAR
MENU
BAR
Use CURSOR A or v to select function. Use CURSOR b to change the function setting. When the function has an "x" in the box, it is ON. Press EXIT to quit menu or CURSOR 4 to return to previous menu. 3DYC (DIGITAL 3DYC COMB FILTER) The 3DYC function automatically turns on the 3 Dimension Luma and Chroma filter. This lessens the dot crawl and cross color. Turn on 3DYC to eliminate flickering, or picture artifacts, that a detailed pattern or scene would normally cause. 3D VIDEO DISC Turn on for 3D Video programs. video disc is deactivated.
Use this mode only when input signal is 3 Dimension.
If activated
and PC ready color TV turns off, 3D
AUTO COLOR The AUTO COLOR function automatically monitors and adjusts the color to maintain constant color levels even after a program channel changes. It also maintains natural flesh tones while preserving fidelity of background colors.
or
NOTE:
It may be necessary to set AUTO Y-(&CR/Y-PBPR Input 2 jacks.
COLOR-ON
to obtain
optimum
picture
quality
when
using
the COMPONENT:
COLOR TEMPERATURE Use this function adjust the white balance (hue) of the picture to your own color preference. Set this to WARM for hotter colors with more red, or set to COOL for less intense colors with more blue.
21
VIDEO
11
I
The COMPONENT SET function is very useful when setting up High Definition, ' NTSC signal while changing the aspect ratio and moving the Horizontal Position.
COMPONENT SET
Standard
Definition
and
I
I
CONTRAST BRIGHTNESS COLOR TINT SHARPNESS RESET ADVANCED SETTINGS MENU IT0
4 IF 4-1) 4-I) 4---l q-1)
100% 50% 50% 50%
+ BAR TO QUIT 1 EXIT
MENU
I
I
ADVANCED
SETTINGS
CURSOR +Fpv--3
COMPONENT COLOR OHDTV
SET SYSTEM OSDTV/DVD
q
3 DYC 0 30 VIDEO DISC IJ AUTO COLOR COLOR TEMPERATURE @COOL 0 WARM COMPONENT SET TO QUIT 1 EXIT
+ CH
ONTSC
0
+ ENU IT0
ASPECT RATIO 016:9 04:3 H POSITION 4-b 6 MENUITO MENU BAR TO QUIT 1 EXIT
MENU
BAR
Press Press Press Press NOTE:
CURSOR CURSOR CURSOR CURSOR
) v A v,
to select Color System (HDTV, SDTV/DVD, NTSC). to change position. or v to highlight then CURSOR b to select ASPECT k to highlight then CURSOR F to select H Position.
RATIO (16 : 9, 4 : 3).
Set up a Component Signal and switch to Video 2 by pressing the component set function.
the Input Button on the Remote
Control when planning
to use
COLOR SYSTEM The COLOR SYSTEM function allows you to change tint and color coordinate for DTV Programs. HDTV - High Definition Television - Use for High Vision Signal Y-PBPR from HDTV Set-Top Box. SDTV/DVD - Standard Definition Television or Digitat Video Disc Y-CBCR such as DVD (Digital Video Disc Player). NTSC - Basic U.S. Standard Norma! Signal Standardized by the National Television Standard Committee. ASPECT RATIO 16 : 9 - Screen changes to 16 : HDTV signal is normally 4 : 3 - Screen changes to 4 : 3 SDTV and NTSC signals
9 aspect ratio. 16 : 9 aspect ratio. aspect ratio. are normally 4 : 3 aspect ratio.
H POSITION This function
allows you to adjust the Horizontal
Position on DTV mode. This is convenient
when using SET TOP BOX.
22
AUDIO
Select AUDIO SETTINGS to adjust the PC ready color TV to your preference and to improve the sound quality.
CURSOR
BASS TREBLE BALANCE RESET ADVANCED SETTINGS VOLUME CORRECTION 4S1)72% 4-I) 4-b 0 50%
CURSOR
BASS
TREBLE BALANCE RESET ADVANCED SETTINGS VOLUME CORRECTION
411,90% 4-b
50%
t---r
0
MENU
IT0
MENU
BAR
TO QUIT
1 EXIT
WENU
IT0
MENU
BAR
TO QUIT
1 EXIT
Use CURSOR A or v to highlight the function to be adjusted. Press CURSOR 4 or b to adjust the function. Press EXIT to quit menu or cursor 4 to return to previous menu.
NOTE:
If BASS is selected you are adjusting adjusted in the same manner.
BASS.
The additional
menu items TREBLE
and BALANCE
can be selected
and
BASS
This function controls
the low frequency
audio to all speakers.
1
TREBLE
) This function
controls
the high frequency
audio to all speakers.
1
BALANCE
1 This function will control the left to right balance
of the TV internal speakers
and the AUDIO TO HI FI output.
1
RESET
1 When RESET is selected, the "ARE YOU SURE?" display will appear on the screen to confirm your choice. Press CURSOR b to return AUDIO adjustments t