Toshiba 48L1433DG Manuale utente

SERVICE MANUAL

LCD Color Television

48L1433DG

48L1433DB

(System Information)

REVISED:01

REVISION HISTORY

REV

Date

Reason for Change

Jun/13/2014

- Supplement of deficient page for Power Schematic

CONTENTS

1. IMPORTANT NOTICE

2. GREEN PRODUCT PROCUREMENT

3. LEAD-FREE SOLDER

4. SAFETY INSTRUCTION

5. FIRMWARE UPDATING

6. INTERCONNECT

7. EXPLODED VIEW

8. HOTEL MODE / HOTEL CLONE

9. SCHEMATIC DIAGRAM

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.

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.

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 30ºC to

40ºC (54ºF to 72ºF). 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.

(1/ 3)

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.

(2/ 3)

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

(3/ 3)

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.

FIRMWARE UPDATING PROCEDURE

Analog - Digital SW update via USB

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

 Mb95_en.bin

 mboot.bin

 usb_auto_update_T4.txt

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

3. Keep pressing and holding “OK” key from Toshiba remote controller and at the same time turn power to

ON by mechanical SW and hold OK pressed until the standby led blinks very rapidly. Bul led blink time

is longer than MB6X chassis

4. When the blinks of led is stopped, TV opens autamatically.

5. Power OFF / ON TV set, then TV will be ready

When TV is ON

1. Software can be upgraded on Software Upgrade Mode.

2. To access Software Upgrade Mode, you will need to enter “1505 with your remote controller,

3. When main menu is on. On this mode, a simple yes/no screen appears which asks to upgrade the

software.

4. In the USB Mass storage devices, there should be the binary whose name likes ‘upgrade_mb95.bin’.

5. You will see a simple progress menu which shows the status of the upgrade,

6. This will be completed by restarting of the system

Wiring Diagram

1GND

2LED 2

3LED 1

4IR_IN

5 5V_STBY

CN11 CN2 CN4 CN501

1NC 1GND 1PIN1 1V_Led

2NC 2GND 2GND 2LED1_S

3NC 3 3V3_VCC 3 STBY 3 LED2_S

4NC 4 3V3_VCC 4 GND 4NC

5 OP_PIN5 , 5 24V_VCC_AU 5 BACKLIGHT_ON/OFF 5LED2_S

6 OP_PIN6 6 3V3_STBY 6 GND 6LED3_S

7 OP_PIN7 7 12V_STBY 7 PWM DIMMING 7LED4_S

8 OP_PIN8 8 12V_STBY 8 GND

9 OP_PIN9 9 5V_VCC 9 5V_STBY

10 OP_PIN10 10 5V_VCC 10 12V_STBY

CN27 11 OP_PIN11 11 5V_VCC 11 12V_VCC or PIN3

1GND 12 TX_1_0_N 12 12V_STBY 12 PIN4 or 12V_VCC

2LED2 13 TX_1_0_P 13 DIMMING

3LED1 14 TX_1_1_N 14 GND

4IR_IN 15 TX_1_1_P 15 BACKLIGHT_ON/OFF

5 5V_STBY 16 TX_1_2_N 16 GND

17 TX_1_2_P 17 POWER PIN13

18 GND 18 GND

19 TX_1_CLK_N 19 POWER PIN1

20 TX_1_CLK_P 20 GND

21 GND

22 TX_1_3_N

23 TX_1_3_P

24 TX_1_4_N

25 TX_1_4_P

27 OP_PIN27

28 TX_2_0_N CN15

29 TX_2_0_P 1R_AUDIO_P

30 TX_2_1_N 2R_AUDIO_N

31 TX_2_1_P 3L_AUDIO_P

32 TX_2_2_N 4L_AUDIO_N

33 TX_2_2_P

34 GND

35 TX_2_CLK_N

36 TX_2_CLK_P

37 GND

38 TX_2_3_N

39 TX_2_3_P

40 TX_2_4_N

41 TX_2_4_P

42 OP_PIN42

43 OP_PIN43

44 GND

45 GND

46 GND

48 Panel VCC

49 Panel VCC

50 Panel VCC

51 Panel VCC

PANEL

MainBoard MB95 and MB95S

LED-IR BOARD

Speaker

CN100

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