Hitachi 60SBX78B, 50SBX78B Safety Precautions, Leakage Current for Appliances and Underwriters

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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.

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.

(READING

LEAKAGE SHOULD NOT

CURRENT BE ABOVE 0.5mA)

DEVICETESTER

METAL SURFACES

EARTH

& ’ GROUND

ALSO TEST WITH PLUG REVERSED

(USING AC ADAPTER PLUS AS REQUIRED)

AC Leakage Test

ANY MEASUREMENTS NOT WITHIN THE LIMITS

SPECIFIED HEREIN INDICATE A POTENTIAL SHOCK HAZARD THAT MUST BE ELIMINATED BEFORE RETURNING THE INSTRUMENT TO THE

CUSTOMER OR BEFORE CONNECTING THE ANTENNA OR ACCESSORIES.

e. High Voltage - This receiver is provided with a hold down circuit for clearly indicating that voltage has

increased in excess of a predetermined value. Comply will all notes described in this Service Manual regarding this hold down circuit when servicing, so that this hold down circuit may correctly be operated.

f. Service Warning -With maximum contrast, operating high voltage in this receiver is lower than 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.

Chassi: ground

 

 

FBT

High

Impedance

(T702)

\

H.V.

meter

High voltage

 

 

connector

 

Deflection

P.W.B.

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Contents Projection Color Television ContentsSafety Notice USE Isolation Transformer When Servicing Leakage Current for Appliances and Underwriters Safety PrecautionsDetailing X-radiation Shield TubePage Immediately before handling any semiconductor Servicing PrecautionsUse Solding Iron to Pry Leads Bare Jumper Insulated Jumper WireDetermine the positions Soldering Iron Iron wireTechnical Cautions IPOWER/DEFLECTION PWBStereo Audio Output Audio Output PowerDimension 50SBX78B Audio InputTransmitter General InformationBrightness Color Tint Customized Picture and Sound AdjustmentsCursor COLOR, TintBass IllTV Guide PLUS+ GuideVCR Example StepOutside antenna or Cable TV coaxial cable SelectAudio RecallVCR #I 0Set U END of SET UP Covering the high voltage output FBTRemark Make sure the silicon cover isAdjustment CRTCPT Adjustment procedure Adjustable data Others Fixed data be careful not to changeWhen Exchanging Time Tour at first Power on byContrast Half Brightness Minimum Final Assembly AdjustmentSub brightness adjustment White balance adjustmentMrn Repeat for P832 and ROM6 Green, P862 and ROM4 for RedPoint FrontrearCenter Front Rear Front RearVertical size adjustment R630 +2 mmTwa4 +- $$i Horizontal size adjustment R603 Adjustment preparationObserving Points Convergence first. Press front panel MagicThis can eliminate the need for a complete JIG Screen Specification BeforeAfter ROM Write Convergence point adjustmentDigital Convergence Remote Control Then Press RECALL’GUIDE+ OSD CRT, cabinet locations Adjustment PointROM8 ROM6 ROM4 SURROUNDP.W.B.SIGNALSUB B. VMMain Chassis Signal P.W.B IsciiPower/Deflection P.W.B Main ChassisIXI CPT R G B, Focus Pack, Control P.W.B OoorTvsv TroubleshootingYes OFFNo.~ Voltage at pin 5 Yes E991 blown YesYes Normal Normal Abnormal 0517 Q516Does on-screen 1501, 1903, 1001 Q108, Q109, QllO, Q008U102 Yes Vcc Sv, BP 5v, T3u102 Eception impossible with snow noise YesCl902 Defective SynchronizationPRT G PRT RU101 No SoundNtsc DCU Repair TableTV ON/OFF Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Exploded MEW Symbol Part Replacement Parts ListIooopfkb 50V Tape ProductComponents 5OV Symbol PartIEL TapeChip Symbol Product ServiceCSE3 Symbol Part Light DescriptionRmpgogd MTZJ-ICircuits Part SymbolTuner Unit 5MA UkdgCoil Part Description1OUH IoouhReceiver Through Improper Servicing QAI 1KJ Tape ROA2 ROP7 Replacement Parts List With a n Have special OOK-JB OK-JB SRD1/2P-SSRD1/2P-B IOK-JBRAC2 Chip1KJ MINI-CHIPIOK-JQ OHMRkio RgiiRlio Symbol Part NO.NO RY50 Symbol EF05951

60SBX78B, 50SBX78B specifications

The Hitachi 50SBX78B and 60SBX78B are advanced plasma televisions that represent the pinnacle of display technology in their respective categories. These models bring together innovative features, cutting-edge technology, and sleek design, ensuring an immersive viewing experience for consumers.

One of the standout characteristics of the Hitachi 50SBX78B and 60SBX78B is their screen size, with the 50-inch model catering to smaller spaces while the 60-inch offers a more cinematic experience. Both models boast impressive Full HD resolution, delivering a crisp and vibrant picture quality that enhances any viewing experience, whether it be movies, sports, or gaming.

The technology behind these televisions includes Hitachi's proprietary image processing technology, which optimizes picture quality by minimizing noise and enhancing color accuracy. This leads to deeper blacks and brighter whites, ensuring that every scene is rendered with stunning detail. The Plasmavision technology further enhances the black levels and contrast ratios, making images pop off the screen.

In addition to superior image quality, both models come equipped with a variety of connectivity options. Multiple HDMI inputs allow users to easily connect various devices such as gaming consoles, Blu-ray players, and streaming devices. The inclusion of USB ports facilitates easy viewing of photos and videos stored on external drives.

Moreover, Hitachi televisions have integrated audio technologies that enhance the overall viewing experience. The built-in speakers provide clear sound, while the digital audio output allows for connection to external sound systems, giving consumers the flexibility to customize their audio experience.

Energy efficiency is also a notable feature of the Hitachi 50SBX78B and 60SBX78B models. They are designed to consume less power than traditional televisions, aligning with the growing demand for environmentally friendly electronics. This not only reduces electricity bills but also minimizes the carbon footprint.

The sleek and modern design of these plasma televisions makes them an attractive addition to any home décor. The slim bezel offers a larger screen-to-body ratio, maximizing the viewing area while maintaining an elegant appearance.

In summary, the Hitachi 50SBX78B and 60SBX78B offer a compelling package of features, technologies, and characteristics that cater to the needs of modern viewers. With superior image quality, versatile connectivity, and energy efficiency, these televisions are designed to deliver an exceptional home entertainment experience.
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