Hitachi 50SBX78B, 60SBX78B User Manual

SERVICE MANUAL

CONTENTS

CAUTION:

SAFETY PRECAUTIONS .............................................

SERVICING PRECAUTIONS ........................................... .6

TECHNICAL CAUTIONS .............................................. 10

SPECIFICATIONS ................................................... 11

CIRCUIT PROTECTION .............................................. 11

GENERAL INFORMATION ............................................ 12

CUSTOMIZED PICTURE AND SOUND ADJUSTMENTS ..................... .13

TV GUIDE PLUS+ .................................................. .15

CAUTIONS WHEN CONNECTING/DISCONNECTING THE HV CONNECTOR ..... .22

SERVICE ADJUSTMENTS ............................................ .23

TROUBLESHOOTING ............................................... .39

PROTECTION CIRCUIT BLOCK DIAGRAM ............................... .47

BASIC CIRCUIT DIAGRAM ........................................... .49

PRINTED CIRCUIT BOARDS .......................................... .64

BLOCK DIAGRAM .................................................. .68

WIRING DIAGRAM .................................................. .69

EXPLODED VIEW .................................................. .71

REPLACEMENT PARTS LIST .......................................... .72

Before servicing this chassis, it is important that the service technician read the “Safety Precaution”

and “Product Safety Notices” in this service manual.

SAFETY NOTICE

USE ISOLATION TRANSFORMER WHEN SERVICING Components having special safety characteristics are identified by a 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 “Safety Precautions” and “Product Safety Notices” in this Service Manual.

*For continued x-radiation protection, replace picture tube with original type of Hitachi approved equivalent type.

SPECIFICATIONS AND PARTS ARE SUBJECTTO CHANGE FOR IMPROVEMENT

PROJECTION COLOR TELEVISION

SEPTEMBER 1998 HHEA-MANUFACTURING

SAFETY NOTICE

USE ISOLATION TRANSFORMER WHEN SERVICING

Components having special safety characteristics are identified by anon 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 “Safety Precautions” and the “Product Safety Notices” 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.

SAFETY PRECAUTIONS

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.

(READING

& ’ GROUND

EARTH

DEVICE

METAL SURFACES

ALSO TEST WITH PLUG REVERSED (USING AC ADAPTER PLUS AS REQUIRED)

LEAKAGE SHOULD NOT CURRENT BE ABOVE 0.5mA)

TESTER

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.

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 33.0 kV. In case any component having influence on high voltage is replaced, confirm that the high voltage with maximum contrast is lower than 33.0 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.

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) Cl01 .O

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.

Chassi: ground

High Impedance H.V. meter

Deflection P.W.B.

FBT

(T702)

High voltage

connector

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 measure-

ments 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.

R-Lens

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, C, or D 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

G-Lens B-Lens

Shield Plate A

Fig. 1. Detailing X-radiation Shield

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.

Design Alteration Warning - Do not alter or add to

3. 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.

Picture Tube Implosion Protection Warning - The

4. 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.

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.

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 A in the parts list. Use of

substitute replacement that does not have the same

safety characteristics as the recommended replace-

ment 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.

Hot Chassis Warning - a. Some TV receiver chassis

5. 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 .OV 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.

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-of-plate, or

frayed wiring. Do not change spacing between

components and the printed circuit board. Check AC

power cord for damage.

SERVICING PRECAUTIONS

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 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.

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.

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 400M0

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.

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 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. 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.

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.

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 static electricity sufficient to damage an ES device.)

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.

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.

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 anti-static, 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.

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.

d. Closely inspect the solder area and remove any excess

or splashed solder with a small wire-bristle brush.

Use Solding Iron to Pry Leads

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.

6. Replace heatsink. Diode Removal/Ret>lacement

Remove defective diode by clipping its leads as close as possible to diode body.

Bend the two remaining leads perpendicularly to the

circuit board.

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.

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 hollow stake.

2. Securely crimp leads of replacement component around stake l/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 weaker. the cdhesive that bonds the foil to the circuit board, causing the foil to separate from, or “lift-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 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 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.

DEfECTlVE

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.

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.

BARE JUMPER

Install Jumper Wire and Solder

3. Bend a small “U” in one end of a small-gauge jumper wire and carefully crimp i! around the IC pin. Solder the IC connection.

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

Always unplug the instrument AC power cord before disconnecting or reconnecting FS tuning system cables and before removing or inserting FS tuning system modules.

The FS tuner must never be disconnected from the FS tuning control module while 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.

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.

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.

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

How to Replace Flat-IC

-Required Tools-

* Soldering iron

De-solder braids

1. Remove the solder from all of the pins of a Flat-IC by using a de-solder braid.

Flat-IC

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.

Remove the solder from all of the pads of the Fiat-IC by using

a de-solder braid.

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 positions of the soldering pads and pins by correctly aligning the polarity symbol.

Solder all pins to the soldering pads using a fine

tipped soldering iron.

iron wire or small awl

Magnifier

Iron

Wire

~-“‘! Flat-IC

--WI-

De-Solder

Braid

Soldering

Iron

Awl

Polarity Symbol

TypE13$F:;:; 63:

MH DIODE RESISTOR

1ST DIGIT

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.

Bridge Solder

oldering

Iron

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 12OV 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.

Chassis ground

Deflection P.W.B.

4. When the limiter circuit is operating properly, High Voltage will be less than 36.5 kV at 0.6mA 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.

High voltage connector

High impedance H.V. meter

1905 #l pin

POWER/DEFLECTION PWB

FBT (T702)

(Disconnect the # @ pin of 1905 from +B line. Connect jig (15kQ VR) between +B line and # @ pin of 1905)

Jig

Fig. 2. Deflection/Power P.C.B.

SPECIFICATIONS

Model:

Cathode-Ray Tube:

Power Input:

Power Consumption:

Antenna Impedence:

Receiving Channel:

Intermediate Frequency:

Video Input:

Video Output:

50SBX78B 6OSBX78B

R=Pi GLFTOORFA G=PlGLFTOOHLA B=Pi GLFTOOBMB

120 volts AC, 60 Hz

240 Watts - Maximum 212 Watts - Operating

75 Ohm Unbalanced VHF I UHF I CATV

&yQ

VHF 2-13 UHF EXT. Mid (A-5)-(A-i), 4+ CATV Mid. A-l CATV Super J-W CATV Hyper (Wtl)-(Wt28)

Picture I-F Carrier 45.75 MHz Sound I-F Carrier 41.25 MHz Color Sub Carrier 42.17 MHz

1 Volt p-p, 75 Ohm 1 Volt p-p, 75 Ohm (Y)

0.7 Volt p-p, 75 Ohm, (Cb, Cr)

1 Volt p-p, 75 Ohm

G!i

14-69

Audio Input:

Stereo Audio Output:

470 mVrms, 47 k Ohm

470 mVrms, 1 k Ohm

Audio Output Power:

Front: 15 Watts per channel at 10% distortion, 8 Ohm impedence.

Max. output - 18 Watts.

Rear: 7.5 Watts per channel at 10% distortion, 8 Ohm impedence.

Max output - 10 Watts.

Center: 7.5 Watts per channel at 10% distortion, 8 Ohm impedence.

Max output - IO Watts

Anode Voltage

Brightness:

Speakers:

2 Woofers - 5 inch (12 mm) round 2 Tweeters - 2 inch (5 mm) round 2 Center Speakers - 4 inch (10 mm) round

31.5 kV (Zero Beam Current)

5OSBX78B - 250 cd/m2 60SBX78B - 170 cd/m2 (white screen)

Dimension:

Height (in.) Width (in.) Depth (in.) Weight (Ibs.)

50SBX78B

51 ‘31,s 60 '31~~

47 7132 51 "/32

24 21/32 27 ‘I~

195

80SBX78B

255

Circuit Board Assemblies:

C.P.T. (B) P.W.B. Terminal P.W.B. C.P.T. (G) P.W.B. VM P.W.B. C.P.T. (R) P.W.B. Surround P.W.B. Signal P.W.B. Power/Deflection P.W.B. Signal Sub P.W.B.

Control P.W.B. Sensor Distribution P.W.B.

CIRCUIT PROTECTION

CAUTION:

Example:

“RISK OF FIRE - REPLACE FUSE AS MARKED”

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.

/ 5A125V\

-:-+

F901

The rating of fuse F901 is 5.OA - 125V. Replace with the same type fuse for continued protection against fire.

GENERAL INFORMATION

Rear Speaker

Terminals-,

TV/Video Source Selector TV/Video Source Selector

Fig. 3. Control Panel

a&c Focus

_ S-Video

Inputs

Antenna

Inputs

Variable Transmitter

Inputs/Outputs 1 and 2 Audio Output

output

Fig. 4. Rear Connections Panel

CUSTOMIZED PICTURE AND SOUND ADJUSTMENTS

Select VIDEO to adjust picture settings and improve picture quality.

CURSOR

CONTRAST 4-I, 75% BRIGHTNESS COLOR 4I1,50%

TINT

SHARPNESS 4-I, 50% RESET

ADVANCED

SETTINGS

MENU IT0 MENU BAR TO QUIT 1 EXIT

4-I) 50%

4---I

CURSOR

CONTRAST BRIGHTNESS COLOR 4-I) 50%

TINT

SHARPNESS RESET

ADVANCED

4-b 98% 4-I) 50%

4---I 4-I,

I”““““’

Use the CURSOR A or v buttons to highlight the function to be adjusted. Press the CURSOR 4 or b buttons to adjust the function. Press EXIT to quit menu.

NOTE: . 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.

l Contrast and Brightness adjustments will affect only the main picture. These adjustments will not affect the

sub-picture.

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 ULTRA Al is OFF.

BRIGHTNESS

Use this function to adjust overall picture brightness.

50%

COLOR

TINT

Use this function to adjust the level of color in the picture.

Use this function to adjust flesh tones so they appear natural. (It may be necessary to adjust TINT to obtain optimum picture Quality when using the COMPONENT: Y-C&r Input 2 jacks).

Use this function to adjust the amount of fine detail in the picture.

When RESET is selected, press CURSOR b to return video adjustments to factory preset conditions.

Press the front panel MAGIC FOCUS button momentarily

CONVERGENCE

MAGIC FOCUS

for auto setup.

To adjust manually, press and hold the MAGIC FOCUS button until CENTER MODE or STATIC MODE is displayed.

Press EXIT on the remote to select red or blue. Green is stationary. Use the cursor buttons to adjust. Center mode only adjusts the center section. Static mode adjusts the entire screen. Note: This new data is in RAM memory only and will be lost if the MAGIC FOCUS button is pressed again.

Select AUDIO SETTINGS to adjust the TV to your preference and to improve the sound quality.

BASS TREBLE BALANCE RESET ADVANCED

SETTINGS

MENU 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.

NOTE:

If BASS is selected you are adjusting BASS. The additional menu items TREBLE and BALANCE can be

selected and adjusted in the same manner.

4”,72% 4-I) 50% 4---I

CURSOR

I I

BASS TREBLE

BALANCE 4-b--‘RESET

ADVANCED

Ill

4”,90% 4-I, xw”

pi&l This function controls the low frequency audio to all speakers.

This function controls the high frequency audio to all speakers.

This function will control the left to right balance of the TV internal speakers, the AUDIO TO HI FI

output, and WIRELESS OUT output.

When RESET is selected, press CURSOR b to return audio adjustments to factory preset

E conditions.

TV GUIDE PLUS+

This feature allows you to view program information for up to 1 week in the future. It also allows you to control your cable box and VCR with your TV.

jSetUD1

MENU LANGUAGE PLUG & PLAY

CURSOR

SIGNAL SOURCE

AUTO CHANNEL SET

CHANNEL MEMORY CHANNEL LIST CLOCK SET MAGIC FOCUS GUIDE PLUS+

MENU IT0 MENU BAR

TO QUIT 1 EXIT

Use CURSOR A or v to select the TV GUIDE Plus+ Option of your choice, then press SELECT.

CURSOR

What would you like to do?

I./ Setup TV GUIDE Plus+

TV GUIDE Plus+ Channel Edito! View TV GUIDE Plus+ Demo

Exit

Press up/down to choose. Then, press Select

TV GUIDE Plus+ Options Menu

Setup TV GUIDE Plus+: This allows you to set up TV GUIDE Plus+ so your TV can download data, control

your cable box and control your VCR.

TV GUIDE Plus+ Channel Editor: This allows you to change channel numbers in the guide (using the number buttons)

as well as enable or disable channels from the guide. You can enable up to 100 channels in the Channel Editor.

View TV GUIDE Plus+ DEMO:

This will start the TV GUIDE Plus+ demonstration, allowing you to understand the features and operation of this system.

Press EXIT or CURSOR r to highlight EXIT then press SELECT to quit menu.

NOTES: 1. It is recommended that you first select View TV GUIDE Plus+ Demo to gain an understanding of what the

system can do and how it operates. Then select Setup TV GUIDE Plus+ so that you can set your TV to download data and control your cable box and VCR. Finally, select TV GUIDE Plus+ Channel Editor to customize your TV GUIDE Plus+ system.

2. If a channel is set to OFF in the Channel Editor, that channel cannot be recorded to a VCR.

SET UP TV GUIDE Plus+

Before you can use TV GUIDE Plus+ you must perform the setup. Simply use your illuminated remote control to enter the information provided here. Screens very similar to those you will see as you perform each step are shown here.

STEP 1

1. From the Hitachi on screen display menu, enter the SETUP-GUIDE Plus+ menu.

2. Use the CURSOR buttons to select Setup TV GUIDE Plus+, then press the SELECT button on your remote.

NOTE: Completing Setup clears previously downloaded TV GUIDE Plus+ Setup data. Only enter this section after TV GUIDE Plus+ is setup if you intend to change your setup (ie. for new zipcode, new

VCR, or new cable box).

STEP 2

1. Use the CURSOR buttons to select U.S.A. or CANADA,

then press SELECT.

STEP 3

What would you like to do?

I./ Setup TV GUIDE Plus+

Press up/down to choose. Then, press Select

Where do you live?

I./ USA

Press up/down to choose. Then, press Select

U.S.A. Example

TV GUIDE Plus+

Options Menu

TV GUIDE Plus+ Channel Editon View TV GUIDE Plus+ Demo Exit

TV GUIDE Plus+ Setup

Canada

1. Using the number buttons on

your remote, enter your zipcode. You may also use the CURSOR buttons to enter your zipcode or to make a correction.

2. When finished, press SELECT.

1. Use the CURSOR A,v buttons to input the first

number or letter of your postal

C A

code.

2. N When you have selected the letter or number, press the

CURSOR b button to move to the next position. (Press CURSOR 4 to make a correction.)

3. Repeat steps 1 and 2 for all six

spaces.

TV GUIDE Plus+ Setup

Enter the zip code where your TV is located:

q = = = =

Canada Example

TV GUIDE Plus+ Setup

Enter the postal code where your TV is located:

q =====

TV GUIDE Plus+ Setup

Enter the zip code where your TV is located:

4 6 6 7

TV GUIDE Plus+ Setup

Enter the postal code where your TV is

located:

L5N2L8

4. When finished, press SELECT.

STEP 4

SET UP TV GUIDE Plus+

1. Use the CURSOR button to select YES or NO, then press SELECT.

2. If you select YES, you will go to step 5. If you select NO, you will go to step 9.

STEP 5

Use the CURSOR buttons to SELECT YES or NO, then press

SELECT.

2. If you select YES, you will go to step 6. If you select NO, you will go to step 9.

NOTES: A. As indicated on page 13 of this guide, you must connect your cable

box RF Out to TV ANT A in order for TV GUIDE Plus+ to download

data. B. The cable box must always be left on. C. The TV will download TV GUIDE Plus+ data only when it is off. During

this time, you will notice the cable box changing channels without any

user input. This is normal. The TV is searching for the Host channel.

Do you have cable?

jJ Yes

Press “pidown lo choose. Then. press Select.

TV GUIDE Plus+ Setup

Do you have a cable box?

Yes

Press up/down to choose. Then. press Select.

Basic connection for TV GUIDE Plus+ setup with no cable box and no VCR.

REAR SPEAKER

8 n ONLY

Outside antenna or cable TV coaxial cable.

TV GUIDE is a registered trademark of TV Guide Financial, Inc. VCR Plus+, C3, PlusCode and GUIDE Plus+ are trademarks of Gemstar Development Corporation. The VCR Plus+ and GUIDE Plus+ systems are manufactured under

license from Gemstar Development Corporation and VCR Index Systems B.V., respectively.

ANT A

TO CONVERTER

ANT B

r COMPONENT 1 >

,NPUT , ,NpUT 2 MO;;;OR WlRELES AUDIO

OUT TO HI-FI

SET UP TV GUIDE Plus+

STEP 6

TV GUIDE Plus+ Setup

1. Turn your cable box ON and tune it to channel 02.

2. Use the CURSOR buttons to select your cable box brand from the list, then press SELECT. (It will take a few seconds for TV GUIDE Plus+ to check the cable box code.)

NOTE: When using a cable box with TV Guide Plus+, set your remote to TV mode. This allows your IR Blaster

connector to control your cable box, enabling you to see channel call letters when changing channels or pressing RECALL.

Tune your cable box to channel 02. Select your cable box brand from the list below.

press “Pldmv” to change brand. The”. pr**s Select.

Hitachi

Basic connection for TV GUIDE Plus+ setup with cable box and without VCR.

Coaxial Cable

REARSPEAKER

8 n ONLY

ANT A

I 7 COMPONENT 7

VIDEO

Cable TV Box

To IRlGLlNK

STEP 7

1. If your cable box switches to Channel 09, use the CURSOR buttons to select YES. Then press SELECT.

2. If your cable box does not switch to Channel 09, use the CURSOR buttons to select NO. Then press SELECT. TV GUIDE Plus+ will try

another version of cable box code (ie. 16-02.)

AUDIO

t I I

,NPUT, ,NP”T 2 MO~t$OR WlRELES AUDIO

Did Cable Hitachi code 16-01 switch your cable box to 09?

IJ Yes

Press “p/down to change brand. The”. press Select.

OUT TO HI-FI

TV GUIDE Plus+ Setup

(If TV GUIDE Plus+ does not recognize your cable box after several tries, a screen stating, “Cable box test failed. Please consult your manual and try again” will appear. You should check the CATV brand again and repeat these steps. Also, check that the If? Mouse is in front of the cable box’s IR receiver window.)

STEP 8

SET UP TV GUIDE Plus+

TV GUIDE Plus+ Setup

1. Using the CURSOR buttons, select the channel number to which your cable box Output is set. It is usually set to Channel 3 or Channel 4.

2. Then press the SELECT button on your remote.

STEP 9

1. Use the CURSOR buttons to select YES or NO, then press SELECT.

2. If you select YES, you will go to step IO. If you select NO, you will go to end of setup.

NOTE:

You must connect your VCR RF Out to TV ANT A in order for TV GUIDE Plus+ to download data and control your VCR for recording. (See below).

Select cable box mtput channel:

O/AUX

Press up/down to choose. Then. press Select.

TV GUIDE Plus+ Setup

Do you have a VCR

IJ Yes

Press up/down to choose. Then. press Select.

Basic connection for TV GUIDE Plus+ setup without cable box and with VCR.

Outside antenna or CableTV Coaxial

REAR SPEAKER

VCR #I

To IWGLINK

I I I

,NP”T ,

r COMPONENT 1

-“’ i - - :

:$j,i :,I

; , :

LA!9

Set U

SET UP TV GUIDE Plus+

STEP 10

1. Tune your VCR to channel 02, then turn if OFF.

2. Use the CURSOR buttons to select your VCR brand from the list, then press SELECT. (It will take a few seconds for TV GUIDE Pius+ to check the VCR code.)

Basic connection for TV GUIDE Plus+ setup with cable box and VCR.

f-Cable TV Coaxial Cable

Cable TV Box

VCR #I

REAR SPEAKER

8 R ONLY

ANT A

CONVERTER

TV GUIDE Plus+ Setup

Tune your VCR to channel 02. then turn it off. Select your brand from the list below.

f I

Hitachi

r COMPONENT 1

STEP 11

1. If your VCR turns on and switches to Channel 09, use the

CURSOR buttons to select YES. Then press SELECT.

2. If your VCR does not turn on and switch to Channel 09, use the CURSOR buttons to select No. Then press SELECT. TV GUIDE

Plus+ will try another version of VCR code (ie. 21-02.)

I I I

,N~UT, ,NPUT 2 MO;i$OR WlRELES AUDIO

TV GUIDE Plus+ Setup

Did Hitachi code 21-01 switch

your VCR to 09?

[J Yes

Press up/down to choose. Then, press Select

OUT TO HI-FI

( If TV GUIDE Plus+ does not recognize your VCR after several tries, a screen stating, “VCR test failed, please consult

your manual and try again” will appear. You should check the VCR brand again and repeat these steps. Also, check that

the IR Mouse is in front of the VCR’s IR receiver window.)

END OF SET UP

1. A screen telling you that TV GUIDE Plus+ will be ready for use within 24 hours appears. Make sure that you turn the cable box ON and the VCR OFF.

NOTE: If you have a system with a cable box, make sure you change the VCR channel back to where you normally watch or record from the cable box (typically Channel 03 or 04).

2. Press the SELECT button to return to the TV GUIDE Plus+ options menu.

Your TV GUIDE Plus+ will be ready for use within 24 hours.

Always leave your cable box ON and your VCR OFF.

3. Press the EXIT button to exit Setup.

4. If you have a cable box turn the TV off.

5. The TV will begin searching for the channel that contains the TV GUIDE Plus+ data (host channel). When it locates the host channel, it starts to download the Setup Information. This download usually takes less than 15 minutes. However, on some cable systems, this download may take as much as three hours.

6. If you have a cable box, you should allow the TV to control your cable box until Host Search and data Download are complete.

TV GUIDE Plus+ Setup

NOTES: 1) If you do not have a cable box, you can watch TV while the Host Search and Channel Map Download are in

progress. PIP, however, will not be available until the Host Search and Channel Map Download are complete because the TV uses the PIP tuner to receive the TV GUIDE Plus+ information. Also, note that TV GUIDE Plus+ will not be available until Host Search and download functions are complete.

2) For TV GUIDE Plus+ to download Program Information, the TV must be off, regardless of TV GUIDE Plus+ settings.

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.

Fig. A

3. Remove the connector slowly by pulling it away from the

case.

FBT

Roll out silicon cover from FBT’s contact area slowly.

the connector about 90 degrees following the arrow (0 position), push the connector slightly towards the case. (Fig. A)

Fig. B

During Insertion

1. Please refer to direction for insertion as shown in Fig. B (L position). Insert connector until “CLICK” sound is heard.

2. Make sure the connector is pressed right in, so that it has a good contact with the spring.

3. Confirm the contact by pulling the connector slightly. (Don’t pull hard because it may damage the connector).

4. Cover the high voltage output by carefully pushing silicon cover onto it. (Don’t turn the connector). (REMARK)

1. Make sure the silicon cover is covering the high voltage output.

Silicon Cover

less than 1 mm

SERVICE ADJUSTMENTS

1. ASSEMBLED P.W.B. ADJUSTMENT l-l. l-2. Comb Filter Operation Check l-3. Sub Picture Position Adjustment

2. FINAL ASSEMBLY ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

2-l. 2-2. 2-3. 2-4. 2-5. 2-6. 2-7. 2-8. 2-9. 2-10. 2-11. 2-12. 2-13. 2-14.

2-15.

Memory Initialization ............................................................ .24

FocusAdjustment...............................................................2 5

White Balance Adjustment ....................................................... .26

SubBrightness Adjustment Sub Picture White Balance Adjustment

Surround Check .............................................................. ..2 7

Raster Inclination Adjustment (Deflection Yoke) ........................................

Raster Position Adjustment ....................................................... .29

Vertical Size Adjustment (R630) Horizontal Size Adjustment (R603)

BeamAlignment................................................................3 0

Beam Shape Adjustment ....................................................... ..3 0

Static Focus Adjustment ......................................................... .31

Blue Defocus Adjustment ....................................................... ..3 1

Digital Convergence Adjustment

2-14-l. Phase Adjustment (service mode)

2-14-2. Raster Position Adjustment ............................................

2-14-3. Convergence Point Adjustment ......................................... .33

2-14-4. Digital Convergence Remote Control

Guide + OSD Adjustment

.....................................................

..................................................... .24

................................................... .24

..................................................... ..2 6

.............................................. .27

................................................... .29

................................................. .30

................................................... .31

....................................... .32

..................................... .33

........................................................ .34

.24

.28

.32

3. ADJUSTMENT POINT 3-l. CRT (R)(G)(B), Cabinet Locations

3-2. Main Chassis (Signal P.W.B.) .......................................................

3-3. Main Chassis (Power/Deflection P.W.B.)

3-4. CPT (R)(G)(B), Focus Pack, Control P.W.B. ............................................ .38

................................................................ .35

...................................................

...............................................

.35

.36

.37

1. ASSEMBLED P.W.B. ADJUSTMENT 1 .l Memory Initialization

Adjustment procedure

(1) Press INPUT key on Control Panel and then

Power On to access Video Chroma adjustment

mode. (2) Receive signal on main picture. (3) Check the OSD according to table below, using

Av buttons on Remote Control.

P.01 AP84 SERVICE SUB CONT 14 SUB COLOR 10 SUB TINT SUB SHARP 38 EXT RGB BRIGHT 40 EXT RGB CONT 60 BRIGHTNESS 80

SUB BRIGHT ADJ. 0 INITIAL SET 0

PO2 G DRIVE GAIN B DRIVE GAIN H POSITION AFC G H BLK END PHASE V BLK PHASE V FREQUENCY V POSITION R-Y POSITION R-Y LEVEL G-Y LEVEL GPPHS

P.03 S-TRAC

YA Y DL TXACL

COLOR A

AP84

i-l

B.E. P POINT1

WPDL 1 1

HI BRT

I-l+1

B CUT OFF 80

H POSI (CENT)

V POSI (CENT) 1 07 I*

INITIAL SET

C TRAP

TOF FQ TOF Q

COLOR SYSTEM DY GAIN

*: Adjustable data. Others: Fixed data (be careful not to change)

(4) Check MENU key to exit VIDEO CHROMA

ADJUST mode.

NOTE: (1) If there is a different value than shown

(2) When exchanging microprocessor and

(3) Should be changed to OFF for FIRST

0 0 0 0

CLAMP DELAY

in table above, for fixed data, adjust it using 4, buttons (only in this case).

TV is turned on for first time, it requires

initialization of VIDEO CHROMA ADJ

on Pl and P6.

TIME TOUR at first Power ON by pressing MENU key during FIRSTTIME TOUR running.

P.05 1 AP84

! 1 I

P.06 AP84-

1 0

Z OSD SETTINGS

04 *

1.2 Comb filter operation check Adjustment preparation (1) Receive the color bar signal at the regular tuning

point.

(2) Set the CONTRAST control to MAX and the

other controls to center.

(3) Set the Al to OFF, and 3D Y/C to ON in

Advanced Settings.

Adjustment procedure (1) Check that between the color bars there are not

line dots every second color bar as shown in the drawing.

Check @and (@line dots.

1.3

Sub-picture position adjustment Adjustment preparation (1) Select signal on main picture. (2) Video settings have to be at normal condition.

Adjustment procedure

Press the INPUT and POWER button on Control

(1)

Panel at same time to access VIDEO CHROMA

ADJUST mode.

Select H POSI and V POSI using A’(I buttons.

;:;

Adjust the H POSI (HORIZONTAL) and V POSI

(VERTICAL) position using 4, buttons. Press MENU button to exit VIDEO CHROMA

(4)

ADJUST mode. Select single PINP mode and move the sub

(5)

picture, using the MOVE button. Distance between PINP and edge of screen should be equal when moved. If it is not, repeat (1) - (5).

NOTE: Check the position of MULTI PINP mode.

Check the right edge of the sub pictures for

MV-4 to make sure there is no separation between the MULTI PINP and the edge of

the screen.

2. FINAL ASSEMBLY ADJUSTMENT

2.1 Focus adjustment Adiustment preparation

The set can face in any direction: west, east,

(1)

north or south. Receive the cross-hatch pattern signal.

(2)

CONTRAST : HALF BRIGHTNESS : MINIMUM The electrical focus adjustment should have

(3)

been completed. The centering DY inclination should have been

(4)

adjusted.

Adjustment procedure

Loosen-the fixing screw on the lens cylinder so

(1)

that the lens cylinder can be turned. (Be careful

not to loosen too much. If it is loosened too much, rattling when tightening becomes greater and the focus may drift). After completing steps (5), (6) and (7) below, tighten the fixing screws for each lens with a torque of 12-17 Kgf cm.

Apply covers to 2 of R, G and B lenses, and

(2)

project a single color on the screen and adjust in sequence.

(The adjustment order of R, G and B is only an example.)

For each of the R, G and B lenses, observe the

(3)

color abberation generated on the outer circumference of the cross-hatch bright line at the center section +3 pitches vertically and horizontally from the center.

If the lens adjustment knob is turned clockwise,

(4)

viewed from the front, the color aberration changes as follows.

Set Size Pitch between Ll & L2

50” 60”

In case of R lens, set to the position where the

63)

3.0 cross-hatch pitches

chromatic aberration changes from red to crimson. As shown below, observe the vertical bright line at the center and set to the position where the crimson chromatic aberration slightly appears inside and red outside (reference value:

1-3mm) within the cross-hatch pitches specified in next table.

RED CHROMATIC ABERRATION

SLIGHTLY CRIMSON

CHROMATIC ABERRATION

In case of G lens, set to the point where the

(5)

chromatic aberration switches from blue to red. If the chromatic aberration appearing all over the screen is not the same, observe the vertical

bright line at the center of the screen and set to

the position where red chromatic aberration

slightly appears inside and blue outside (reference value: l -3mm) within the cross-hatch pitches specified in next table. When the red chromatic aberration appearing at both sides of the bright line is not equal, observe the side with larger chromatic aberration when adjusting.

RED CHROMATIC ABERRATION

SLIGHTLY BLUE CH6OMATlC ABERRATION

OR NO COLOR

(7) In case of B lens, set to the position where the

chromatic aberration changes from purple to

green. As shown below, observe the vertical bright line at the center and set to the position

where green chromatic aberration slightly

appears inside and purple outside (reference value: l-3mm) within the cross-hatch pitches specified in next table.

PURPLE CHROMATIC SLIGHTLY GREEN

ABERRATION CHROMATIC ABERRATION

Set Size Pitch between L

I I

50”

60”

3.0 cross-hatch pitches

Notes:

(1) Fixing screw (2) Color aberration

FIXING SCREW COLOR ABERRATION

CROSS-HATCH

(3) Since the G light is very important for picture

quality and performance, pay special attention in its adjustment.

Note:

(4) For red, setting to the center between red and

(5) For blue, setting to the center between purple

Be careful not to touch the lens with your

fingers when adjusting.

crimson is optimum.

and green is optimum.

2.2 White balance adjustment

(1) Screen adjustment (2) High brightness white balance. (3) Low brightness balance.

(5) Select the input signal for high brightness (Video

level = 0.715Vpp).

(6) Adjust the high brightness white balance using

the drive adjustment VRs (red, green).

(7) Select the signal for low brightness (Video level

= 0.145Vpp)

(8) Adjust the low brightness white balance using

the screen adjustment VRs (red, green, blue).

(Visually adjust).

(9) Check that high brightness white balance is

obtained. If it does not, return to step (7).

NOTE:

Before adjusting the White Balance, check that

the screen adjustment VRs are turned fully

counterclockwise. Since the phosphorescent surface of the CRT is likely to be burned, be careful.

White balance = 9300” K f OMPCD

Color coordinate = x . . . . . . 0.285

. . . . . . 0.295

2.3 Sub brightness adjustment

Adjustment preparation

(1) Start adjustment 20 minutes or more after the

power is turned ON. Receive the color bar

signal. (2) Set the contrast and color controls to minimum. (3) The vertical incident illumination on the screen

should be 20 Iux or less.

Adjustment preparation

(1) Start adjustment 20 minutes or more after the

power is turned on.

(2) The vertical incident illumination on the screen

should be 20 lux or less.

(3) Set the video settings (CONTRAST: MAX,

others: center) to standard condition

(4) For low brightness white balance adjustment,

input a white raster signal level of 0.145 Vp-p (Video input level).

(5) For high brightness white balance adjustment,

input a white raster signal level of 0.715Vp-p (Video input level).

(6) Set the drive adjustment VRs (red and green) to

12 - 2 o’clock position.

(7) Turn the screen adjustment VRs (red, green and

blue) fully counterclockwise.

(8) Set video advanced setting white control to

COOL position.

Adjustment procedure

(1) Go to VIDEO CHROMA ADJUST mode by

pressing INPUT and Power button on Control Panel at the same time.

(2) In “SERVICE” mode push b button and screen

turns to black. Gradually turn the screen

adjustment VRs (red, green, blue) clockwise and set them where the red, green and blue slightly bright lines just appear evenly on the screen.

(3) Push the b button again to return to “Normal”

side.

(4) Press “MENU” button to exit VIDEO CHROMA

ADJUST.

\ 1 1 1 / black

Adjustment procedure

(1) Go to “Sub Brightness” adjustment in VIDEO

CHROMA ADJUST mode (press Input and

Power button on Control panel at same time), using A v buttons and then b button.

(2) Then adjust “Sub Brightness” using 4 b buttons

to increase or decrease the value, according to

figure. (Visually adjust). (3) After adjustment, press MENU button to exit

VIDEO CHROMA ADJUST mode. (Data is

stored in memory).

Note:

When selecting SUB-BRIGHTNESS mode the

mcon sets the CONTRAST and COLOR to MIN. automatically, but make sure that the other

conditions are center. Directly observe the

screen by eye without using a mirror.

2.4 Sub picture white balance adjustment (ROM4, ROM6, ROM6)

Adjustment preparation

(1) Start adjustment after power is ON for 20

minutes. (2) Use a white raster signal for adjustment. (3) Press “FREEZE” on the remote control and

select “SINGLE” freeze mode to display the sub

picture. (4) Set CONTRAST to Maximum, Other conditions

to center.

Adjustment procedure

(1) Connect oscilloscope to P802 and adjust ROM8

to match blue level of main and sub pictures. (2) Repeat for P832 and ROM6 Green, P862 and

ROM4 for Red.

2.5.1 Surround off check Adjustment procedure

(1) Set to SURROUND: OFF and check that the

waveform shown below is obtained (Input signal @ and @ ).

FRONT

(5kHz)

R (400Hz)

Note: The rear and center will have no output.

2.5.2 Surround off/monaural check Adjustment procedure

Check that the following waveform is obtained. The amplitudes of 2 channels are equal. (Input signal @ only).

FRONT

Note: If the sub picture has a signal sag, adjust level at

center point.

2.5 Surround Check Adjustment preparation

(1) Input the following audio signals to the audio

input of the VIDEO INPUT terminals.

When checking surround:

@ L CH: No signal

@ R CH: 400Hz sine wave 1 Vpp.

Set the AUDIO ADVANCED SETTING for INT. SPEAKERS ON,DYNAMIC BASS OFF, LOUDNESS OFF and PERFECT VOLUME OFF

Set the volume control of FRONT to around the center.

Set the BASS, TREBLE and BALANCE to center.

Note:

Front waveform: Front speaker output of the

set.

I24

(400Hz)

Note: Monaural check can be omitted. The rear

and center have no output.

2.5.3 Matrix surround check Adjustment procedure

(1) Set to SURROUND: MATRIX

Check that the following waveforms are obtained.

(Input signal @I and @ ).

Front: Check that the phases of R and L are

different and 400Hz is superimposed on 5kHz. The amplitudes of R and L are different.

Rear: Check that the phases of R and L are

opposite and 400Hz is superimposed on 5kHz. The amplitudes of R and L are different.

FRONT

REAR

:mrn

Note: Center has no output.

2.5.4 Matrix surround/monaural check Adjustment procedure

Check that the following waveforms are obtained.

(Input signal @ only)

Front: R and L waveforms are almost equal.

Rear: R and L waveforms are almost Zero.

FRONT

REAR

2.5.7 Dolby surround check Adjustment procedure

(1) Set to SURROUND: DOLBY-NORMAL

Check that the following waveforms are obtained. (Input Signal @ and @ )

Front: 400 Hz is superimposed on 5kHz.

Rear: R and L are the same signal and 400Hz

is superimposed on 5kHz.

FRONT REAR

Note: Center has no output.

2.5.5 Hall surround check Adjustment procedure

(1) Set to SURROUND: HALL.

(Input signal 0 and @ ).

Front: Check that the phases of R and L signals

are different and 400 Hz is superimposed on 5kHz.

Rear: Check that the R and L are opposite and

400Hz is superimposed on 5kHz. The R and L amplitudes are equal.

FRONT REAR

Note: Amplitude levels of front R and L are not

even depending on P.W.B. Center has no output.

2.5.6 Hall surround/monaural check Adjustment procedure

Check that the following waveforms are obtained.

(Input signal @ only)

Front: The phases of R and L are different.

The amplitudes are different.

Rear: The phases of R and L are opposite.

The amplitudes of R and L are equal.

FRONT

REAR

Note: The monaural check can be omitted.

Amplitude levels of front R and L are not even depending on the P.W.B. Center has no output.

Note: MODE: PRO LOGIC (NORMAL)

2.5.8 Dolby surround/monaural check Adjustment orocedure

Set

(1)

SURROUND: DOLBY-NORMAL Check that the following waveforms are obtained.

(Input signal @ only).

Front: Almost no output from both R and L.

Center: Same as the audio input signal.

Rear: Almost no output from both R and L.

CENTER

FRONT REAR

2.6 Raster Inclination adjustment (Deflection yoke) Adjustment preparation

The set can face east or west.

(1)

Input the single cross test signal.

I:;

Set video conditions to factory reset.

The lens focus adjustment should have been

(4)

completed.

The electric focus should have been coarse

(5)

adjusted.

The digital convergence RAM should be cleared

(6)

(uncorrected state). With the TV set off, press and hold the service switch located on the Power/Deflection PWB and then press the power button. Start adjustment 20 minutes or more after TV is

(7)

turned on. Adjustment procedure (1) Apply covers to the R and B lenses and project

only green light.

(2) Turn the G deflection yoke and adjust the vertical

raster inclination.

(3) Then, remove the cover of R or B lens and project

red or blue light and green light together on the

screen.

Turn the deflection yoke of R or B and set so that

(4)

the inclination of R or B with respect to the green

light is as shown below on the top and bottom sides.

After raster inclination adjustment, fixing screw

(5)

of DY should be screwed with 12+2kg-cm

torque.

t?, +2

Geometric center of the

1 1 F”-f- . . . . f . . . . . f . . . . . i . . . . . i .... 1

CROSSHATCH (GREEN)

t2 -

Notes:

iREDC34

n!yIIz

(1)

If internal cross-hatch does not appear after clearing RAM data, press service switch again, on POWER/DEFLECTION PWB. To restore old RAM data, turn TV off and on.

(2)

2.7 Raster position adjustment

Adiustment oreparation

The set’can face east or west.

(1)

Input the single cross test signal.

I:;

Set video conditions to factory reset. The lens focus adjustment should have been

(4)

completed. The electric focus should have been coarse

(5)

adjusted. The digital convergence RAM should be cleared

(6)

(uncorrected state). With the TV set off, press and hold the service switch located on the Power/Deflection PWB and then press the power button. Start adjustment 20 minutes or more after TV is

(7)

turned on.

Adjustment procedure (1) Turn the centering magnets for red, green, and

blue to satisfy the condition below. The red and blue horizontal lines should match with green.

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NOTES:

(1) If internal cross-hatch does not appear after

clearing RAM data, press service switch again.

(2) To restore old RAM data, turn TV off and on.

2.6 Vertical size adjustment (R630)

Adjustment preparation

The set can face east or west.

I:;

Input the single cross test signal. Set video conditions to factory reset.

(3)

The lens focus adjustment should have been

(4)

completed. The electric focus should have been coarse

(5)

adjusted. The digital convergence RAM should be cleared

(6)

(uncorrected state) . With the TV set off, press

and hold the service switch located on the

POWER/DEFLECTION PWB and then press the power button. Start adjustment 20 minutes or more after TV is

(7)

turned on.

Adiustment procedure

Turn only the green by applying covers to the red

(1)

and blue lens or shorting the 2 pin TS connectors on the red and blue CPT P.W.B. Count the vertical lines of the DCU cross hatch.

(2)

If the number of vertical lines is 9, go to step (3). If the number of vertical lines is 8, push “HELP” key and then “5” key on the R/C so the number of vertical lines becomes “9”. Turn vertical amplitude adjustment VR (R630) so

(3)

that the distance between the top and bottom horizontal lines is equal to the size shown in the table.

Size

ma4

60” 8OOk 50” 65Ok

5mm 5mm

Note:

(1) If internal cross-hatch does not appear after

clearing RAM data, press service switch again (on POWER/DEFLECTION PWB).

(2) To restore old RAM data, turn TV off and on.

2.9 Horizontal size adjustment (R603) Adjustment preparation

The set’can face east or west.

(1)

Input the single cross test signal.

I;;

Set video conditions to factory reset. The lens focus adjustment should have been

(4)

completed. The electric focus should have been coarse

(5)

adjusted.

The digital convergence RAM should be cleared

(6)

(uncorrected state). With the TV set off, press and hold the service switch located on the POWER/DEFLECTION PWB and then press the power button. Start adjustment 20 minutes or more after TV is

(7)

turned on.

Adjustment procedure

(1) Project only green, the same as Vertical size

adjustment.

(2) Turn horizontal amplitude adjustment VR (R603)

so distance between the left and right vertical lines is equal to the size shown in the table.

(,V 1970k5min 1

_ -

l-2-J

Note: (1) If internal cross-hatch does not appear after

clearing RAM data, press service switch

again.

(2) To restore old RAM data, turn TV off and on.

2.10 Beam alignment Adjustment preparation

(1) Adjust at least 30 minutes after turning on power

switch.

(2) Raster inclination, centering, horizontal and

vertical amplitudes and optical focus adjustment

should be completed. (3) Set video conditions to factory reset. (4) Receive cross-hatch signals. (Use of internal

cross-hatch signals allowed.)

Short-circuit all metal parts (metal fittings,

(5)

centering magnet) installed on the projection tubes to GND’s of the projection tubes.

Since metal Darts are charaed with electricitv, shocks mav be caused if thev are not short circuited.

Adiustment procedure

Green (G) tube beam alignment adjustment.

(1)

Short-circuit 2P subminiature connector plug pins of Red (R) and Blue (B) on the CPT boards and project only Green (G) tube.

Put Green (G) tube beam alignment magnet to

(2)

the cancel state as shown below.

Turn the Green (G) static focus (Focus Pack)

(3)

counterclockwise all the way and make sure of position of cross-hatch center on screen. (Halo state.) Turn the Green (G) static focus (Focus Pack)

(4)

clockwise all the way. (Blooming state.) Turn two magnets forming alignment magnet in

(5)

any desired direction and move cross-hatch center to position found in (3).

If image position does not shift when Green (G)

(6)

static focus (Focus Pack) is turned. Green (G)

beam alignment has been completed. If image position shifts when Green (G) static

(7)

focus (Focus Pack) is turned, repeat (2)-(6).

Conduct beam alignment for red (R) focus:

(8)

Focus Pack UFPK Blue (B) focus: Focus Pack UFPK. Upon completion of adjustment, fix beam

(9)

alignment magnets with white paint.

2.11 Beam shape adjustment Adjustment preparation

(1) The beam alignment

completed.

(2) The raster inclination,

vertical amplitude and optical focus adjustments

should have been completed. (3) Set video conditions to factory reset. (4) Input the dot signal.

Adjustment orocedure

Green PRT beam shape adjustment. Short-

(1)

circuit 2P sub-mini connectors on Red and Blue

CPT PW.B.s to project only the Green beam.

Turn the green static focus fully clockwise.

(2)

(Blooming.)

Make the dot at the screen center a true circle

(3)

using the 4-pole magnet as shown below.

Also adjust the Red and Blue PRT beam shapes

(4)

according to the steps (1) to (3).

After the adjustment has been completed, return

(5)

R, G and B static VRs to the just focus point.

should have been

centering, horizontal/

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