HITACHI 53SWX01W - Service Manual Immediate Download

SEPTEMBER 2000

HHEA-MANUFACTURING DIVISION

No. 0134

53SWX01W

61SWX01W

R/C: CLU-572TSI

R/C: CLU-575TSI

R/C: CLU-577TSI

N T

T S

S C

7 C

siis

SERVICE MANUAL

CONTENTS

SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

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

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

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

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

CAUTIONS WHEN CONNECTING/DISCONNECTING THE HV CONNECTOR . . . . . .12

GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

REMOTE CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

CUSTOMIZED PICTURE AND SOUND ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . .15

SERVICE ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

AUDIO LEVEL DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

PROTECTION CIRCUIT BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

DC VOLTAGE TABLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67

WAVEFORMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79

BASIC CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82

PRINTED CIRCUIT BOARDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97

BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103

WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104

CHASSIS WIRING DRAWING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105

EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .111

REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .113

EXPLODED VIEW PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .143

QUICK REFERENCE PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .144

CAUTION:

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

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.

PROJECTION COLOR TELEVISION

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

Components having special safety characteristics are identified by a

on the schematics and on the parts list in this service

manual and its supplements and bulletins. Before servicing this chassis, it is important that the service technician read and

follow the "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.

FEDERAL COMMUNICATIONS COMMISSION NOTICE

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the

FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential

installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in

accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee

that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or

television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct

the interference by one or more of the following measures:

¥ Reorient or relocate the receiving antenna.

¥ Increase the separation between the equipment and the receiver.

¥ Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

¥ Consult the dealer or an experienced radio/television technician for help.

SAFETY NOTICE

USE ISOLATION TRANSFORMER WHEN SERVICING

SAFETY PRECAUTIONS

1. Before returning an instrument to the customer, always

make a safety check of the entire instrument, including

but not limited to the following items.

a. Be sure that no built-in protective devices are

defective and/or have been deleted during servicing.

(1) Protective shields are provided on this chassis to

protect both the technician and the customer.

Correctly replace all missing protective shields,

including any removed for servicing convenience. (2)

When reinstalling the chassis and/or other assembly

in the cabinet, be sure to put back in place all

protective devices, including but not limited to,

nonmetallic control knobs, insulating fishpaper,

adjustment and compartment covers/shields, and

isolation resistor/capacitor networks. Do not operate

this instrument or permit it to be operated without

all protective devices correctly installed and

functioning. Servicers who defeat safety features

or fail to perform safety checks may be liable for

any resulting damage.

b. Be sure that there are no cabinet openings through

which an adult or child might be able to insert their

fingers and contact a hazardous voltage. Such

openings include, but are not limited to (1) spacing

between the picture tube and cabinet mask, (2)

excessively wide cabinet ventilation slots, and (3) an

improperly fitted and/or incorrectly secured cabinet

back cover.

c. Antenna Cold Check Ð 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 1 MegaOhm±10%, 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 Ð With the instrument

completely reassembled, plug the AC line cord

directly into a 120V AC outlet. (Do not use an isolation

transformer during this test.) Use a leakage current

tester or a metering system that complies with

American National Standards Institute (ANSI) C101.0

Leakage Current for Appliances and Underwriters

Laboratories (UL) 1410, (50.7). With the instrument

AC switch first in the on position and then in the off

position, measure from a known earth ground (metal

waterpipe, conduit, etc.) to all exposed metal parts of

the instrument (antennas, handle bracket, metal

cabinet, screw heads, metallic overlays, control

shafts, etc.), especially any exposed metal parts that

offer an electrical return path to the chassis. Any

current measured must not exceed 1.3 milliamps.

Reverse the instrument power cord plug in the outlet

and repeat 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 Ð 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 Ð With maximum contrast, operating

high voltage in this receiver is lower than 35.5 kV. In

case any component having influence on high voltage

is replaced, confirm that the high voltage with

maximum contrast is lower than 35.5 kV.

To measure H.V. use a high impedance H.V. meter.

Connect (-) to chassis earth and (+) to the CRT anode

button. (See the following connection diagram.)

Note: Turn power switch off without fail before the

connection to the anode button is made.

LEAKAGE

CURRENT

TESTER

(READING

SHOULD NOT

BE ABOVE 0.5mA)

EARTH

GROUND

TEST ALL

EXPOSED

METAL SURFACES

DEVICE

UNDER

TEST

2-WIRE CORD

ALSO TEST WITH PLUG

REVERSED

(USING AC ADAPTER

PLUS AS REQUIRED)

Chassis

ground

High Impedance

H.V. meter

Deflection P.W.B.

FBT

(TH01)

High voltage

connector

AC Leakage Test

g. X-radiation TUBE: The primary source of X-

radiation 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 pic-

ture tube and the high voltage component.

Do not operate the chassis longer than is necessary

to locate the cause of excessive voltage.

h. X-radiation Shield

1. This receiver is provided with X-ray shield plates

for protection against X-radiation. Do not remove

X-ray shield plates A, B, or C shown in Fig. 1

unnecessarily,

when

troubleshooting

and/or

making test measurements.

2. To prevent X-radiation, after replacement of

picture tube and lens, confirm these components

to be fixed correctly to bracket and cabinet, and

not to be taken off easily.

Shield Plate A (1.6mm)

Glass Lens for Shielding

Shield Plate B (1.6mm)

Shield Plate C (1.6mm)

Detailing X-radiation shield, ( ) plate thickness

Shield Plate B (1.6mm)

Fig. 1. Installation of shield lens, shield cover and shield plates (oblique view).

2. Read and comply with all caution and safety-related

notes on or inside the receiver cabinet, on the

receiver chassis, or on the picture tube.

3. Design Alteration Warning Do not alter or add to

the mechanical or electrical design of this TV receiver.

Design alterations and additions including but not

limited to circuit modifications and the addition of

items such as auxiliary audio and/or video output

connectors, might alter the safety characteristics of

this receiver and create a hazard to the user. Any

design alterations or additions may void the

manufacturer's warranty and may make you, the

servicer, responsible for personal injury or property

damage resulting therefrom.

4. Picture Tube Implosion Protection Warning The

picture tube in this receiver employs integral

implosion

protection.

For

continued

implosion

protection, replace the picture tube only with one of

the same type number. Do not remove, install, or

otherwise handle the picture tube in any manner

without first putting on shatterproof goggles equipped

with side shields. People not so equipped must be

kept safely away while picture tubes are handled.

Keep the picture tube away from your body. Do not

handle the picture tube by its neck.

5. Hot Chassis Warning a. Some TV receiver chassis

are electrically connected directly to one conductor of

the AC power cord and may be safely serviced

without an isolation transformer only if the AC power

plug is inserted so that the chassis is connected to the

ground side of the AC power source. Confirm that the

AC power plug is inserted correctly with an AC

voltmeter by measuring between the chassis and a

known earth ground. If a voltage reading in excess of

1.0V is obtained, remove and reinsert the AC power

plug in the opposite polarity and again measure the

voltage potential between the chassis and a known

earth ground. b. Some TV receiver chassis normally

have 85V AC (RMS) between chassis and earth

ground regardless of the AC plug polarity. These

chassis can be safely serviced only with an isolation

transformer inserted in the power line between the

receiver and the AC power source, for both personnel

and test equipment protection. c. Some TV receiver

chassis have a secondary ground system in addition

to the main chassis ground. This secondary ground

system is not isolated from the AC power line. The two

ground systems are electrically separated by

insulating material that must not be defeated or

altered.

6. Observe original lead dress. Take extra care to assure

correct lead dress in the following areas: a. near

sharp edges, b. near thermally hot parts be sure

that leads and components do not touch thermally hot

parts, c. the AC supply, d. high voltage and e. antenna

wiring. Always inspect in all areas for pinched, out-of-

plate, or frayed wiring. Do not change spacing

between components and the printed circuit board.

Check AC power cord for damage.

7. Components, parts, and/or wiring that appear to have

overheated or are otherwise damaged should be

replaced with components, parts, or wiring that meet

original specifications. Additionally, determine the

cause of overheating and/or damage and, if

necessary, take corrective action to remove any

potential safety hazard.

8. PRODUCT SAFETY NOTICE Many TV electrical

and mechanical parts have special safety-related

characteristics some of which are often not evident

from visual inspection, nor can the protection they

give necessarily be obtained by replacing them with

components rated for higher voltage, wattage, etc.

Parts that have special safety characteristics are

identified in Hitachi service data by shading on

schematics and by a

in the parts list. Use of

substitute replacement that does not have the same

safety characteristics as the recommended 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.