Toshiba 32KV501B Schematic

SERVICE MANUAL

LCD Color Television

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32KV501B

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IMPORTANT NOTICE

WARNING:

You are requested that you shall not modify or alter the information or data provided

herein without prior written consent by Toshiba. Toshiba shall not be liable to anybody

for any damages, losses, expenses or costs, if any, incurred in connection with or as a

result of such modification or alteration.

THE INFORMATION OR DATA HEREIN SHALL BE PROVIDED "AS IS" WITHOUT ANY

WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED WARRANTY OF

MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

Toshiba shall not be liable for any damages, losses, expenses or costs, if any, incurred

in connection with or as a result of use of any information or data provided herein.

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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.

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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 86ºF to 104ºF

(30ºC to 40ºC). 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.

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SAFETY INSTRUCTION

WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "SAFETY PRECAUTION"

AND "PRODUCT SAFETY NOTICE" INSTRUCTIONS BELOW.

Safety Precaution

WARNING: SERVICING SHOULD NOT BE ATTEMPTED BY ANYONE UNFAMILIAR WITH

THE NECESSARY PRECAUTIONS ON THIS RECEIVER. THE FOLLOWING ARE THE

NECESSARY PRECAUTIONS TO BE OBSERVED BEFORE SERVICING THIS CHASSIS.

1. An isolation transformer should be connected in the power line between the receiver and

the AC line before any service is performed on the receiver.

2. Always disconnect the power plug before any disassembling of the product. It may result in

electrical shock.

3. When replacing a chassis in the cabinet, always be certain that all the protective devices

are put back in place, such as nonmetallic control knobs, insulating covers, shields,

isolation resistor-capacitor network, etc.

4. Always keep tools, components of the product, etc away from the children, These items

may cause injury to children.

5. Depending on the model, use an isolation transformer or wear suitable gloves when

servicing with the power on, and disconnect the power plug to avoid electrical shock when

replacing parts. In some cases, alternating current is also impressed in the chassis, so

electrical shock is possible if the chassis is contacted with the power on.

6. Always use the replacement parts specified for the particular model when making repairs.

The parts used in products require special safety characteristics such as inflammability,

voltage resistance, etc. therefore, use only replacement parts that have these same

characteristics. Use only the specified parts when the mark is indicated in the circuit diagram or parts list.

7. Parts mounting and routing dressing of wirings should be the same as that used originally.

For safety purposes, insulating materials such as isolation tube or tape are sometimes

used and printed circuit boards are sometimes mounted floating. Also make sure that

wirings is routed and clamped to avoid parts that generate heat and which use high

voltage. Always follow the manufactured wiring routes / dressings.

8. Always ensure that all internal wirings are in accordance before re-assembling the external

casing after a repairing completed. Do not allow internal wiring to be pinched by cabinets,

panels, etc. Any error in reassembly or wiring can result in electrical leakage, flame, etc.,

and may be hazardous.

9. NEVER remodel the product in any way. Remodeling can result in improper operation,

malfunction, or electrical leakage and flame, which may be hazardous.

10. Touch current check. (After completing the work, measure touch current to prevent an

electric shock.)

 Plug the AC cord directly into the AC outlet. Do NOT use an isolation transformer for

this check.

 Connect a measuring network for touch currents between each exposed metallic part

on the set and a good earth ground such as a water pipe.

Annex D

(normative)

Measuring network for TOUCH CURRENTS

Resistance values in orms (Ω).

V: Voltmeter or oscilloscope

(r.m.s. or peak reading)

Input resistance : 1 MΩ Input capacitance : 200 pF

Frequency range : 15 Hz to 1 MHz and d.c. respectively

Note: Appropriate measures should be taken to obtain the correct value in case of

non sinusoidal waveforms.

The measuring instrument is calibrated by comparing the frequency factor of with the solid line in figure F.2 of IEC 60990 at various frequencies. A calibration curve is constructed showing the deviation of from the ideal curve as a function of frequency.

TOUCH CURRENT = / 500 (peak value).

 The potential at any point (TOUCH CURRENT) expressed as voltage and does

not exceed the following value:

The part or contact of a TERMINAL is not HAZARDOUS LIVE if:

a) The open-circuit voltage should not exceed 35 V (peak) a.c. or 60 V d.c. or, if a)

is not met.

b) The measurement of the TOUCH CURRENT shall be carried out in accordance

with IEC 60990, with the measuring network described in Annex D of this

standard.

The TOUCH CURRENT expressed as voltages and , does not exceed the following values:

- for a.c. : = 35 V (peak) and = 0.35 V (peak);

- for d.c. : = 1.0 V

Note: The limit values of = 0.35 V (peak) for a.c. and = 1.0 V for d.c. correspond to the values 0.7 mA (peak) a.c. and 2.0 mA d.c.

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SAFETY INSTRUCTION

Product Safety Notice

Many electrical and mechanical parts in this chassis have special safety-related characteristics.

These characteristics are often passed unnoticed by a visual inspection and the protection

afforded by them cannot necessarily be obtained by using replacement components rated for

higher voltage, wattage, etc. Replacement parts which have these special safety characteristics

are identified in this manual and its supplements; electrical components having such features are

identified by the international hazard symbols on the schematic diagram and the parts list.

Before replacing any of these components, read the parts list in this manual carefully. The use of

substitute replacement parts which do not have the same safety characteristics as specified in

the parts list may create electrical shock, fire, or other hazards.

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SAFETY INSTRUCTION

Handling the LCD Module

Safety Precaution

In the event that the screen is damaged or the liquid crystal (fluid) leaks, do not breathe in or

drink this fluid.

Also, never touch this fluid. Such actions could cause toxicity or skin irritation. If this fluid should

enter the mouth, rinse the mouth thoroughly with water. If the fluid should contact the skin or

clothing, wipe off with alcohol, etc., and rinse thoroughly with water. If the fluid should enter the

eyes, immediately rinse the eyes thoroughly with running water.

Precautions for Handling the LCD Module

CAUTION: The metal edges of the LCD module are sharp, handle it with care.

The LCD module can easily be damaged during disassembly or reassembly; therefore, always

observe the following precautions when handling the module.

1. When attaching the LCD module to the LCD cover, position it appropriately and fasten at

the position where the display can be viewed most conveniently.

2. Carefully align the holes at all four corners of the LCD module with the corresponding holes

in the LCD cover and fasten with screws. Do not strongly push on the module because any

impact can adversely affect the performance. Also use caution when handling the polarized

screen because it can easily be damaged.

3. If the panel surface becomes soiled, wipe with cotton or a soft cloth. If this does not remove

the soiling, breathe on the surface and then wipe again.

If the panel surface is extremely solied, use a CRT cleaner as a cleaner. Wipe off the panel

surface by drop the cleaner on the cloth. Do not drop the cleaner on the panel. Pay

attention not to scratch the panel surface.

4. Leaving water or other fluids on the panel screen for an extended period of time can result

in discoloration or stripes. Immediately remove any type of fluid from the screen.

5. Glass is used in the panel, so do not drop or strike with hard objects. Such actions can

damage the panel.

6. CMOS-LSI circuitry is used in the LCD module, so avoid damage due to static electricity.

When handling the module, use a wrist ground or anchor ground.

7. Do not expose the LCD module to direct sunlight or strong ultraviolet rays for an extended

period of time.

8. Do not store the LCD module below the temperature conditions described in the

specifications. Failure to do so could result in freezing of the liquid crystal due to cold air or

loss of resilience or other damage.

9. Do not disassemble the LCD module. Such actions could result in improper operation.

10. When transporting the LCD module, do not use packing containing epoxy resin (amine) or

silicon resin (alcohol or oxim). The gas generated by these materials can cause loss of

polarity.

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1 GND 2 LED 2 3 LED 1 4 IR_IN 5 5V_STBY

PL805 PL804

CN138 CN1 1 GND 1 24V

1 PANEL_VCC (5V) 1 NC 2 GND 2 24V 2 PANEL_VCC (5V) 2 NC 3 GND 3 24V 3 PANEL_VCC (5V) 3 24V_VCC 4 SW SWITCH 4 24V 4 PANEL_VCC (5V) 4 NC 5 GND 5 24V 5 PANEL_VCC (5V) 5 GND 6 ST_BY 6 GND 6 GND 6 GND 7 GND 7 GND 7 GND 7 NC 8 BL ON/OFF 8 GND 8 GND 8 5V_VCC 9 GND 9 GND 9 N.C. 9 NC 10 DIM PWM 10 A/D_DIM_SEL

10 N.C. 10 5V_VCC 11 12V 11 DIM_PWM_ANALOG

CN703 11 N.C. 11 NC 12 12V_1 12 BL_ON/OFF_1

1 GND 12 GND 12 NC 13 3.3V 2 LED 2 13 TX_3P 13 12V_STBY 14 +5V ST_BY 3 LED 1 14 TX_3N 14 12V_STBY 15 3.3V 4 IR_IN 15 GND 15 5V_STBY 16 3.3V ST_BY 5 5V_STBY 16 TX_CLKP 16 NC 17 3.3V

17 TX_CLKN 17 NC 18 VCC_3V3_ON 18 GND 18 NC 19 3.3V 19 TX_2P 19 DIMMING 20 VCC_3V3_ON 20 TX_2N 20 GND 21 3.3V 21 GND 21 BACKLIGHT_ON/OFF 22 VCC_3V3_ON 22 TX_1P 22 GND 23 GND 23 TX_1N 23 STBY_ON/OFF 24 GND 24 GND 24 GND 25 24V_VCC/STBY_INFO 25 TX_0P 25 NC 26 24VA 26 TX_0N 26 GND 27 KEYBOARD_ONBOARD/NC 27 GND 27 GND 28 A/D DIM SEL 28 N.C. 28 GND 29 N.C.

CN704 30 GND

1 N.C. 2 DVD_CVBS 3 GND 4 GND 5 DVD_SENSE 6 12V_VCC 7 GND

CN710

8 DVD_WAKE_UP 1 GND 9 DVD_SPDIF 2 RIGHT_P

10 DVD_IR 3 RIGHT_N

4 LEFT_P 5 LEFT_N 6 GND

MainBoard MB60 Power Board PW26

PANEL

DVD MODULE

(32DV501 only)

LED-IR BOARD

Speaker

PL900

(AC cable)

PANEL INVERTER

TROUBLESHOOTING GUIDE

UNDER CONSTRUCTION

Note: Please check back in the future.

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FIRMWARE UPDATING PROCEDURE

Analog - Digital SW update via USB

1. Please copy the files to USB device (root).

 mb61_en.bin

 mboot.bin

 usb_auto_update.txt

2. Turn power to OFF by mechanical switch or removing AC plug. And plug the USB to TV.

3. Keep pressing OK key from remote controller and at the same time turn power to ON by

mechanical SW and keep OK pressed until the stanby led blinks rapidly.

4. When the blinks of led is stopped, TV opens autamatically and release OK button.

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HOTEL MODE/HOTEL CLONE

HOTEL TV MENU:

To enter hotel menu, please open main menu by pressing MENU(M) button. When you code

following password "7935", hidden hotel TV menu appears as below:

Figure: Hotel TV Menu

Hotel Mode

Setting "Hotel Mode" item 'On' activates hotel mode. In other words user can do only what

he/she is allowed to do. Restriction level can be determined by using other items on menu

namely Volume Limit, Panel Button, OSD Disable. In hotel mode, users can not reach channel

table and install menu so they could not change any program information.

Last Status

Setting "Last Status" item to 'On' enable TV open with the closing status. Otherwise, if "La

Status" item is set 'Off' TV opens with standby status.

Volume Limit

Sets the maximum value the volume can have. "Volume Limit" can take values between 0-63.

Fixed Volume Enable

Enables (Fixed Volume Enable = On) or prohibits (Fixed Volume Enable = Off) the use of fixed

volume value which is set by menu item "Fixed Volume Value". If Fixed Volume Enable is ON,

volume cannot be set to a value other than the Fixed Volume Value.

Fixed Volume Value

Sets the fixed value the volume can have. If Fixed Volume Limit is ON, volume is set with the

value here.

Headphone Direct Volume

Enables to could set via headphone volume dialog the headphone volume level.

If it is changed to enabled then V+/- keys will change HP volume and left/right option will change

speaker volume unless there is any open osd. If it is disabled it will behave as normal.

Volume control and HP volume control are displayed by volume slider menu.

Panel Lock

Enables (Panel Lock = On) or prohibits (Panel Lock = Off) the use of front panel buttons.

OSD Disable

Disables either only INSTALL menu or all menus, both in analog and digital (IDTV) mode.

All Menus : All menus (MAIN, SOUND, PICTURE, SETTINGS, INSTALLATION) are invisible.

OSD Disable = Disable Setup Menus : Only SETUP menus are invisible.

Invisabel Setup Menus are:

Figure: Hotel TV headphone slider bar

Main menu: Installation, Channel list

Settings menu: Language, parental, Sources, Other settings

Startup Position

Specifies the starting channel when TV is switched ON. May take one of following values:

AUTO (Last channel when TV is turned off) TV (TV channel number 1) Other enabled external sources via service menu or config tool (EXT1, HDMI2, PC, FAV,

SVHS etc.)

Teletext

Enables (Teletext = On) or prohibits (Teletext = Off) the use of teletext (or MHEG if available)

Copy To USB

Copy NVRAM data (service list, preferences, etc.) to USB device. On MB61 and MB60 all nvram

data is stored in 8x32KB Flash files named as Flash0.bin, Flash1.bin ... Flash7.bin. When Copy

to USB is called, those files are copied from TV to USB. Then they can be used for various

purposes testing on another TV or testing/debugging on observatory etc.

Note that USB should be plugged before this operation.

Copy From USB

Copy from USB device data to NVRAM. Just the reverse operation done by copy to USB call.

Previously copied nvram files (Flashx.bin) are copied into TV. If there is no flash file or some of

them are available on USB, the available ones are copied. If no USB is connected, nothing

happens.

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ADJUSTMENT

Service Mode

Panel ID in Global Serial No.

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Total digits

Max 14

YWK

Y : Year 8 2008

9 2009

A 2010

B 2011

C 2012

YWK

3 digits

Model_ID

xxx

3 digits

SERIAL

******

6 digits

(M00001~M99999)

Panel

2digits

WK : Week 01 WK01

02 WK02

03 WK03

04 WK04

53 WK53

Model/Panel Information

Model Model ID Panel ID Main PCB Panel Vestel Product Code

19BV501B P84 L1 20568633 LG LC185WH1-TLG1 10072929

22BV501B P86 K1 20568903 SAM LTA216AT01 10072933

32BV501B

P86 K1 20569022 SAM LTA320AP06-L02 10072937

32BV501B

32BV701B

32BV801B

P88 K1 20569022 SAM LTA320AP06-L02 10074859

P89 K1 20569343 SAM LTA320HM04 10072938

37BV701B P90 L1 20573482 LG LC370WUN-SCC1 10073324

37BV701G P96 L1 20573367 LG LC370WUN-SCC1 10073325

40BV701B P91 K1 20573457 SAM LTA400HM07 10073323

P92 K1 20571938 SAM LTA320HA02 10073217

P92 K2 20571938 SAM LTA320HM04 10074915

40BV801B P94 K1 20572059 SAM LTA400HA07 10073218

32KV501B W02 K1 20569022 SAM LTA320AP06-L02 10075428

40KV701B W03 K1 20573457 SAM LTA400HM07 10075429

Panel vendor

Marking Panel Vendor Marking Panel Vendor Marking Panel Vendor

AUO J S SHARP

B K SAMSUNG T

CMO L LPL/LGD U

D M V

E N W

F P

CPT X

G Q Y

IPS R Z

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PARTS LIST

Precaution

WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "SAFETY PRECAUTION"

AND "PRODUCT SAFETY NOTICE".

CAUTION: The international hazard symbols " " in the schematic diagram and the parts list designate components which have special characteristics important for safety

and should be replaced only with types identical to those in the original circuit or

specified in the parts list.

The mounting position of replacements is to be identical with originals.

Before replacing any of these components, read carefully the

AND "PRODUCT SAFETY NOTICE".

Do not degrade the safety of the receiver through improper servicing.

"SAFETY PRECAUTION"

Note:

 The part number must be used when ordering parts, in order to assist in processing, be

sure to include the Model number and Description.

 The PC board assembly with mark is no longer available after the end of the production.

Abbreviations

Capacitors CD : Ceramic Disk

Resistors CF

: Carbon film

OMF : Oxide Metal Film

PF : Plastic Film

CC : Carbon Composition

VR : Variable Resistor

: Electrolytic

MF : Metal Film

FR : Fusible Resistor

All CD and PF capacitors are ±5 %, 50 V and all resistor, ±5 %, 1/6 W unless otherwise noted.

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