Toshiba 20HLV86S Service Manual

FILE NO. 810-200669GR

REVISED:01

SERVICE MANUAL

LCD TV/DVD COMBINATION

20HLV86S

The above model is classified as a green product (*1), as indicated by the underlined serial number.

This Service Manual describes replacement parts for the green product. When repairing this green

product, use the part(s) described in this manual and lead-free solder (*2).

For (*1) and (*2), see the next page.

DOCUMENT CREATED IN JAPAN, Aug., 2006 GREEN

(*1) GREEN PRODUCT PROCUREMENT

The EC is actively promoting the WEEE & RoHS Directives that define standards for recycling
and reuse of Waste Electrical and Electronic Equipment and for the Restriction of the use of
certain Hazardous Substances. From July 1, 2006, the RoHS Directive will prohibit any
marketing of new products containing the restricted substances.

Increasing attention is given to issues related to the global environmental. Toshiba Corporation
recognizes environmental protection as a key management tasks, and is doing its utmost to
enhance and improve the quality and scope of its environmental activities. In line with this,
Toshiba proactively promotes Green Procurement, and seeks to purchase and use products,
parts and materials that have low environmental impacts.

Green procurement of parts is not only confined to manufacture. The same green parts used in
manufacture must also be used as replacement parts.

(*2) LEAD-FREE SOLDER

This product is manufactured using lead-free solder as a part of a movement within the consumer
products industry at large to be environmentally responsible. Lead-free solder must be used in
the servicing and repair of this product.

WARNING

This product is manufactured using lead free solder .

DO NOT USE LEAD BASED SOLDER TO REPAIR THIS PRODUCT !

The melting temperature of lead-free solder is higher than that of leaded solder by 86°F to 104°F
(30°C to 40°C). Use of a soldering iron designed for lead-based solders to repair product made
with lead-free solder may result in damage to the component and or PCB being soldered. Great
care should be made to ensure high-quality soldering when servicing this product ⎯ especially
when soldering large components, through-hole pins, and on PCBs ⎯ as the level of heat
required to melt lead-free solder is high.

CAUTION

THIS

LCD COLOR TELEVISION

TO ENSURE PROPER USE OF THIS PRODUCT, PLEASE READ THIS SERVICE MANUAL CARE­FULLY AND RETAIN FOR FUTURE REFERENCE. SHOULD THE UNIT REQUIRE MAINTENANCE,
CONTACT AN AUTHORIZED SERVICE LOCATION-SEE SERVICE PROCEDURE.

USE OF CONTROLS, ADJUSTMENTS OR THE PERFORMANCE OF PROCEDURES OTHER THAN
THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

TO PREVENT DIRECT EXPOSURE TO LASER BEAM, DO NOT TRY TO OPEN THE ENCLOSURE.
VISIBLE LASER RADIATION MAY BE PRESENT WHEN THE ENCLOSURE IS OPENED. DO NOT
STARE INTO BEAM.

Location of the required Marking

The rating sheet and the safety caution are on the rear of the unit.

EMPLOYS A LASER SYSTEM.

CERTIFICATION: COMPLIES WITH FDA
RADIATION PERFORMANCE STANDARDS,
21 CFR SUBCHAPTER J.

PREPARATION OF SERVICING

The laser diode used for a pickup head may be destroyed with external static electricity.
Moreover, even if it is operating normally after repair, when static electricity discharge is received at the
time of repair, the life of the product may be shortened.
Please perform the following measure against static electricity, be careful of destruction of a laser diode
at the time of repair.

• Place the unit on a workstation equipped to protect against static electricity, such as conductive mat.

• Soldering iron with ground wire or ceramic type is used.

• A worker needs to use a ground conductive wrist strap for body.

A1-1

IMPORTANT SERVICE SAFETY INFORMATION

Safety precautions to be followed during servicing:

1.

Parts marked with an
list.

2.

Before returning the DVD product to the customer, make the appropriate leakage current check or
resistance measurements to ensure that exposed parts are properly insulated from the supply circuit.

A leakage current check is recommended for this unit. Plug the AC line cord directly into a 120V 60Hz AC
outlet (do not use an isolation transformer for this check). Use a leakage current tester (Fig. 1) or a
metering system which complies with Underwriters Laboratories (UL 1492P). Measure for current from all
exposed metal parts of the cabinet to a known earth ground: particularly, any exposed metal part having a
return path to the chassis. Any current measured must not exceed 0.5mA. Any measurement not within
the limits outlined above are indicative of a potential shock hazard and corrective action must be taken
before returning the unit to the customer.

are critical parts for safety. Replace only with the one described in the parts

(Reading should not be above 0.5mA)

Leakage Current Tester

PRODUCT UNDER TEST

1.5K ohm

0.15 µF

2-Blade polarized
type cord set

Test all exposed
metal surfaces

TEST PROBE

Fig. 1 AC Leakage Test

KNOWN EARTH
GROUND

A1-2

IMPORTANT SAFEGUARDS

1.

READ INSTRUCTIONS

All the safety and operating instructions should be read before the unit is operated.

2.

RETAIN INSTRUCTIONS

The safety and operating instructions should be retained for future reference.

3.

HEED WARNINGS

All warnings on the unit and in the operating instructions should be adhered to.

4.

FOLLOW INSTRUCTIONS

All operating and use instructions should be followed.

5.

CLEANING

Unplug this unit from the wall outlet before cleaning. Do not use liquid cleaners or aerosol cleaners. Use a damp
cloth for cleaning.

6.

ATTACHMENTS

Do not use attachments not recommended by the unit’s manufacturer as they may cause hazards.

7.

WATER AND MOISTURE

Do not use this unit near water. For example, near a bathtub, washbowl, kitchen sink, or laundry tub, in a wet
basement, or near a swimming pool.

8.

ACCESSORIES

Do not place this unit on an unstable cart, stand, tripod, bracket, or table. The
unit may fall, causing serious injury, and serious damage to the unit. Use only
with a cart, stand, tripod, bracket, or table recommended by the manufacturer.

8A.

An appliance and cart combination should be moved with care. Quick stops,
excessive force, and uneven surfaces may cause the appliance and cart
combination to overturn.

9.

VENTILATION

Slots and openings in the cabinet and in the back or bottom are provided for ventilation, to ensure reliable
operation of the unit, and to protect it from overheating. These openings must not be blocked or covered. The
openings should never be blocked by placing the unit on a bed, sofa, rug, or other similar surface. This unit
should never be placed near or over a radiator or heat source. This unit should not be placed in a built-in
installation such as a bookcase or rack unless proper ventilation is provided or the manufacturer’s instructions
have been adhered to.

10.

POWER SOURCES

This unit should be operated only from the type of power source indicated on the rating plate. If you are not sure
of the type of power supply to your home, consult your appliance dealer or local power company. For units
intended to operate from battery power, or other sources, refer to the operating instructions.

11.

GROUNDING OR POLARIZATION

This unit is equipped with a polarized alternating-current line plug (a plug having one blade wider than the other).
This plug will fit into the power outlet only one way. This is a safety feature. If you are unable to insert the plug
fully into the outlet, try reversing the plug. If the plug should still fail to fit, contact your electrician to replace your
obsolete outlet. Do not defeat the safety purpose of the polarized plug. If your unit is equipped with a 3-wire
grounding-type plug, a plug having a third (grounding) pin, this plug will only fit into a grounding-type power
outlet. This too, is a safety feature. If you are unable to insert the plug into the outlet, contact your electrician to
replace your obsolete outlet. Do not defeat the safety purpose of the grounding-type plug.

12.

POWER-CORD PROTECTION

Power-supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon
or against them, paying particular attention to cords at plugs, convenience receptacles, and the point where they
exit from the appliance.

13.

LIGHTNING

To protect your unit from a lightning storm, or when it is left unattended and unused for long periods of time,
unplug it from the wall outlet and disconnect the antenna or cable system. This will prevent damage to the unit
due to lightning and power line surges.

14.

POWER LINES

An outside antenna system should not be located in the vicinity of overhead power lines or other electric light or
power circuits, or where it can fall into such power lines or circuits. When installing an outside antenna system,
extreme care should be taken to keep from touching such power lines or circuits, as contact with them might be
fatal.

15.

OVERLOADING

Do not overload wall outlets and extension cords, as this can result in a risk of fire or electric shock.

16.

OBJECT AND LIQUID ENTRY

Do not push objects through any openings in this unit, as they may touch dangerous voltage points or short out
parts that could result in fire or electric shock. Never spill or spray any type of liquid into the unit.

PORTABLE CART WARNING

(symbol provided by RETAC)

S3126A

A1-3

IMPORTANT SAFEGUARDS (CONTINUED)

OUTDOOR ANTENNA GROUNDING

17.

If an outside antenna or cable system is connected to the unit, be sure the antenna or cable system is grounded
so as to provide some protection against voltage surges and built-up static charges. Section 810 of the National
Electrical Code, ANSI/NFPA 70, provides information with respect to proper grounding of the mast and supporting
structure, grounding of the lead-in wire to an antenna discharge unit, size of grounding conductors, location of
antenna discharge unit, connection to grounding electrodes, and requirements for the grounding electrode.

SERVICING

18.

Do not attempt to service this unit yourself as opening or removing covers may expose you to dangerous voltage
or other hazards. Refer all servicing to qualified service personnel.

DAMAGE REQUIRING SERVICE

19.

Unplug this unit from the wall outlet and refer servicing to qualified service personnel under the following
conditions:

a.

When the power-supply cord or plug is damaged.

b.

If liquid has been spilled, or objects have fallen into the unit.

c.

If the unit has been exposed to rain or water.

d.

If the unit does not operate normally by following the operating instructions. Adjust only those controls that
are covered by the operating instructions, as an improper adjustment of other controls may result in
damage and will often require extensive work by a qualified technician to restore the unit to its normal
operation.

e.

If the unit has been dropped or the cabinet has been damaged.

f.

When the unit exhibits a distinct change in performance, this indicates a need for service.

REPLACEMENT PARTS

20.

When replacement parts are required, be sure the service technician uses replacement parts specified by the
manufacturer or those that have the same characteristics as the original parts.
Unauthorized substitutions may result in fire, electric shock or other hazards.

SAFETY CHECK

21.

Upon completion of any service or repairs to this unit, ask the service technician to perform safety checks to
determine that the unit is in proper operating condition.

WALL OR CEILING MOUNTING

22.

The product should be mounted to a wall or ceiling only as recommended by the manufacturer.

HEAT

23.

The product should be situated away from heat sources such as radiators, heat registers, stoves, or other
products (including amplifiers) that produce heat.

DISC TRAY

24.

Keep your fingers well clear of the disc tray as it is closing. It may cause serious personal injury.

CONNECTING

25.

When you connect the product to other equipment, turn off the power and unplug all of the equipment from the
wall outlet. Failure to do so may cause an electric shock and serious personal injury. Read the owner's manual of
the other equipment carefully and follow the instructions when making any connections.

SOUND VOLUME

26.

Reduce the volume to the minimum level before you turn on the product. Otherwise, sudden high volume sound
may cause hearing or speaker damage.

SOUND DISTORTION

27.

Do not allow the product output distorted sound for a longtime. It may cause speaker overheating and fire.

HEADPHONES

28.

When you use the headphones, keep the volume at a moderate level. If you use the headphones continuously
with high volume sound, it may cause hearing damage.

LASER BEAM

29.

Do not look into the opening of the disc tray or ventilation opening of the product to see the source of the laser
beam. It may cause sight damage.

DISC

30.

Do not use a cracked, deformed, or repaired disc. These discs are easily broken and may cause serious
personal injury and product malfunction.

NOTE TO CATV SYSTEM INSTALLER

31.

This reminder is provided to call the CATV system installer’s attention to Article 820-40 of the NEC that provides
guidelines for proper grounding and, in particular, specifies that the cable ground shall be connected to the
grounding system of the building, as close to the point of cable entry as practical.

A1-4

EXAMPLE OF ANTENNA GROUNDING AS PER THE NATIONAL ELECTRICAL CODE

ANTENNA LEAD
IN WIRE

GROUND

CLAMP

ANTENNA
DISCHARGE UNIT
(NEC SECTION 810-20)

ELECTRIC SERVICE

EQUIPMENT

GROUNDING CONDUCTORS
(NEC SECTION 810-21)

GROUND CLAMPS

NEC-NATIONAL ELECTRICAL CODE

S2898A

POWER SERVICE GROUNDING
ELECTRODE SYSTEM
(NEC ART 250, PART H)

A1-5

WHEN REPLACING DVD DECK

[ When removing the DVD Deck ]

Before removing Pick Up PCB and DVD PCB connector, the short circuit the position shown in Fig. 1
using a soldering iron. If you remove the DVD Deck with no soldering, the Laser may be damaged.

[ When installing the DVD Deck ]

Remove all the soldering on the short circuit position after the connection of Pick Up PCB and DVD
PCB connector.

NOTE

Before your operation, please read "PREPARATION OF SERVICING" .
Use the Lead Free solder.
Manual soldering conditions
Soldering temperature: 350+5
Soldering time: Within 2 seconds
Soldering combination: Sn-3.0Ag-0.5Cu
When Soldering/Removing of solder, use the draw in equipment over the Pick Up Unit to keep the
Flux smoke away from it.

o

C

Pick Up PCB

Fig. 1

Short circuit using a
soldering iron.

A1-6

TABLE OF CONTENTS

CAUTION .....................................................................................................................

IMPORTANT SERVICE SAFETY INFORMATION .....................................................

IMPORTANT SAFEGUARDS .....................................................................................

WHEN REPLACING DVD DECK ................................................................................

TABLE OF CONTENTS ..............................................................................................

GENERAL SPECIFICATIONS ....................................................................................

DISASSEMBLY INSTRUCTIONS

1.REMOVAL OF MECHANICAL PARTS AND P.C. BOARDS ................................

2.REMOVAL AND INSTALLATION OF FLAT PACKAGE IC ..................................

ISP INSTRUCTION .....................................................................................................

RE-WRITE FOR DVD FIRMWARE .............................................................................

WHEN REPLACING EEPROM (MEMORY) IC ...........................................................

ELECTRICAL ADJUSTMENTS ..................................................................................

TROUBLESHOOTING GUIDE ....................................................................................

BLOCK DIAGRAMS

DVD ..........................................................................................................................

SCALER/LVDS/ADC/JACK/AV SWITCH/STEREO SOUND AMP REGULATOR ...

POWER ....................................................................................................................

PRINTED CIRCUIT BOARDS

MAIN ........................................................................................................................

REMOCON/INPUT/OPERATION ............................................................................

HV POWER/POWER ...............................................................................................

DVD DECODER/DVD OUTPUT ..............................................................................

SCHEMATIC DIAGRAMS

SCALER (MAIN) ......................................................................................................

HDMI (MAIN) ...........................................................................................................

INTERFACE/TUNER (MAIN) ...................................................................................

AMP (MAIN) .............................................................................................................

POWER (MAIN) .......................................................................................................

OPERATION/REMOCON ........................................................................................

POWER ....................................................................................................................

HV POWER ..............................................................................................................

DVD OUTPUT ..........................................................................................................

DVD DECODER (DVD DECODER) .........................................................................

SDRAM/FLASH ROM (DVD DECODER0 ................................................................

AV OUT/MUTE/RESERT (DVD DECODER) ...........................................................

INTERCONNECTION DIAGRAM ................................................................................

WAVEFORMS .............................................................................................................

MECHANICAL EXPLODED VIEWS ...........................................................................

MECHANICAL REPLACEMENT PARTS LIST ..........................................................

A1-1
A1-2
A1-3~A1-5
A1-6
A2-1
A3-1~A3-5

B1-1~B1-4
B2-1, B2-2
C1
C-2
C-3
D-1~D-4
E-1~E-9

F-1, F-2
F-3, F-4
F-5, F-6

G-1, G-2
G-3~G-4
G-5, G-6
G-7, G-8

H-1, H-2
H-3, H-4
H-5, H-6
H-7, H-8
H-9, H-10
H-11, H-12
H-13, H-14
H-15, H-16
H-17, H-18
H-19, H-20
H-21, H-22
H-23, H-24
H-25, H-26
I-1~I-3
J1-1~J1-2
K1-1~K1-3

A2-1

GENERAL SPECIFICATIONS

G-1 TV LCD LCD Size / Visual Size 20.04 inch / 508.9mmV

G-2 DVD System Color System NTSC

G-3 Tuning Broadcasting System US System M

G-4 Signal Video Signal Input Level 1 V p-p/75 ohm

G-5 Power Power Source AC 110V~240V, 50/60Hz

G-6 Regulation Safety UL/CSA

G-7 Temperature Operation +5

G-8 Operating Humidity Less than 80% RH

System LCD Type Color TFT LCD

Color System NTSC
Speaker 2 Speaker

Sound Output Max 3W + 3W

Disc DVD, CD-DA, CD-R/RW, Video CD

Disc Diameter 120 mm
Drive SL265WR
Search speed Fwd 4 step

Slow speed Fwd 1/7 -1/2 times

System Tuner and System 1Tuner

Receive CH Destination US (W/CABLE)

Intermediate Picture(FP) 45.75MHz
Frequency Sound(FS) 41.25MHz

Preset CH No
Stereo/Dual TV Sound US-Stereo
Tuner Sound Muting Yes

RGB Signal Output Level -­Audio Signal Input Level -8.0dBm/50k ohm

Power Consumption at AC 100W at 110V~240V 50/60Hz

Protector Power Fuse Yes

Number of Pixels 1366(H) x 768(V)
View Range Left/Right 80/80 degree

Position Front
Size 1.8 x 3.9 inch
Impedance 8 ohm

10%(Typical) ---

Rev 4 step

Rev 1/7 -1/2 times

CH Coverage 2~69, 4A, A-5~A-1, A~I, J~W, W+1~W+84

FP-FS 4.50MHz

Output Level -­S/N Ratio (Weighted) -­Horizontal Resolution at DVD Mode --

Output Level at DVD --

Digital Output Level 0.5 V p-p/75 ohm
S/N Ratio at DVD (Weighted) -­Harmonic Distortion -­Frequency Response : at DVD --

DC --

Stand by (at AC) 3W at 110V~240V 50/60Hz
Energy Star Yes
Per Year -- kWh/Year

Safety Circuit Yes
IC Protector(Micro Fuse) Yes

Radiation FCC/IC
Laser DHHS

Storage -20

Up/Down 80/60 degree

DVD-R/RW (Video Format Only)

Actual 2-45 times (DVD, VIDEO CD)

Actual 2-45 times (DVD, VIDEO CD)

Actual --

Actual --

at TV --

at Video CD --

at SVCD --

at CD --

at DC --

4-40 times (CD)

4-40 times (CD)

--

o

C ~ +35oC

o

C ~ +60oC

A3-1

GENERAL SPECIFICATIONS

G-9 Clock and Clock Yes

G-10 Remote Unit RC-LT

Timer Sleep Timer Max Time 120 Min

On Timer Program
Off Timer Program No
Game Timer
Wake Up Timer No
Timer Back-up (at Power Off Mode) more than -- Min Sec

Control Glow in Dark Remocon Yes

Remocon Format TOSHIBA
Format TOSHIBA
Custom Code 40-BF h ,44-BB h ,45-BA h ,45-BC h
Power Source Voltage(D.C) 3V

Total Keys 49 Keys
Keys

Step

UM size x pcs UM-4 x 2 pcs

Power
EJECT
SLEEP
TV/DVD
1
2
3
4
5
6
7
8
9
0
100 / JUMP
DISPLAY
SUBTITLE
AUDIO SELECT
INPUT / ZOOM
MUTE
CH +
CH ­VOL +
VOL ­PLAY MODE
DVD MENU
UP
LEFT / FAV ­ENTER
RIGHT / FAV +
DOWN
TV MENU/SETUP
EXIT / CANCEL
GAME
PIC SIZE
PAUSE
PLAY
STOP
CH RTN /<SKIP
SEARCH ­SEARCH +
Closed Caption / SKIP>
< SLOW
ANGLE
Marker
SLOW >
TOP MENU
RETURN
REPEAT A-B

10 Min
Yes

Yes

Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes

A3-2

GENERAL SPECIFICATIONS

(

)

G-11 Features Auto Shut Off Yes

(TV) Auto Search Yes

Power On Memory Yes
Comb Filter Yes

Game Position Yes
Auto Setup(Language/CH Program) Yes
Picture Setting(TV) Yes

Picture Setting(PC) Yes

Audio MTS Yes

Tuning CH Program Yes

Label CH Label Yes

Favorite CH Yes
V-Chip Yes

RRT Setup
Lock Hotel Lock No

OSD Language
Closed Caption
CC Advanced
Picture Size Yes
Picture Scroll No
Cinema Mode Yes
Aspect Yes
Backlight Yes
PFC(Power Factor circuit)
Freeze frame No
PIP/POP No
Direct Input Selection Yes
PC Monitor Input Yes

HDMI Input Yes

Component Input Yes

Mode(Picture Preference) Yes
Brightness , Contrast , Color Yes
Tint
Sharpness Yes
Color Temperature Yes
Cable Clear Yes

BRIGHTNESS , CONTRAST Yes
HOR POSITION , VER POSITION Yes
PHASE , CLOCK Yes
AUTO ADJUST No
RED , GREEN , BLUE Yes

Tone Control (Bass/Treble/Balance) Yes
Stable Sound Yes
Surround No
BBE No
SRS WOW (SRS 3D/Focus/Tru Bass) No
Variable Audio Out No

TV/Cable Yes
ADD/DELETE Yes

Video Label Yes

Type

Channel Lock Yes
Video Lock Yes
Panel Lock Yes

VGA (640x480) Yes (60Hz)
VGA (720x400) Yes (70Hz)
WVGA (848x480) Yes (60Hz)
SVGA (800x600) Yes (60Hz)
XGA (1024x768) Yes (60Hz)
WXGA (1280x768) Yes (60Hz)
WXGA (1280x720) Yes (60Hz)
WXGA (1360x768) Yes (60Hz)
SXGA (1280x1024) No

VGA (640x480) Yes (60Hz)
720x480i (4:3) Yes (60Hz)
720x480i (16:9) Yes (60Hz)
720x480p (4:3) Yes (60Hz)
720x480p (16:9) Yes (60Hz)
720x576i (4:3) No
720x576i (16:9) No
720x576p (4:3) No
720x576p (16:9) No
1280x720p Yes (60Hz)
1920x1080i Yes (60Hz)

720x480i (4:3) Yes (60Hz)
720x480i (16:9) Yes (60Hz)
720x480p (4:3) Yes (60Hz)
720x480p (16:9) Yes (60Hz)
720x576i (4:3) No
720x576i (16:9) No
720x576p (4:3) No
720x576p (16:9) No
1280x720p Yes (60Hz)
1920x1080i Yes

3 -D

Yes

USA Type

English French Spanish
Yes

A3-3

No

No

No

60Hz