Toshiba 37BV701B User manual

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SERVICE MANUAL
LCD Color Television
37BV701B Ver. 1.00
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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.
IMPORTANT NOTICE
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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.
GREEN PRODUCT PROCUREMENT
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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.
LEAD-FREE SOLDER
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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.
SAFETY INSTRUCTION
Annex D
(normative)
Measuring network for TOUCH CURRENTS

The potential at any point (TOUCH CURRENT) expressed as voltage and does not exceed the following value:
Resistance values in orms (Ω).
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).
V: Voltmeter or oscilloscope
(r.m.s. or peak reading)
The part or contact of a TERMINAL is not HAZARDOUS LIVE if:
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.
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
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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.
SAFETY INSTRUCTION
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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.
SAFETY INSTRUCTION

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
CN18 CN25 PL816 PL802
1 - 1 - 1 GND 1 +24V
2 - 2 KEYBOARD_ONBOARD 2 GND 2 +24V
3 - 3 24V_VCC 3 GND 3 +24V
4 - 4 STBY_INFO 4 SW_SWITCH 4 +24V
5 - 5 GND 5 GND 5 +24V
6 - 6 GND 6 ST_BY 6 GND
7 OPTION1 7 3V3_VCC 7 GND 7 GND
8 OPTION2 8 5V_VCC 8 BL_ON/OFF 8 GND
9 OPTION3 9 3V3_VCC 9 GND 9 GND
10 OPTION4 10 5V_VCC 10 DIM_PWM_ANALOG 10 A/D_DIM_SEL
CN13 11 OPTION5 11 3V3_VCC 11 +12V 11 DIM_PWM_ANALOG
1 GND 12 TX_1_AN 12 5V_VCC 12 +12V_1 12 BL_ON/OFF_1
2 LED 2 13 TX_1_AP 13 3V3_LPW 13 18
3 LED 1 14 TX_1_BN 14 3V3_LPW 14 +5VSTBY
4 IR_IN 15 TX_1_BP 15 5V_STBY 15 +3.3VS
5 5V_STBY 16 TX_1_CN 16 18V_VCC 16 +3.3VSTBY
17 TX_1_CP 17 12V_CON 17 5V
18 GND 18 12V_VCC 18 VCC_3V3_ON
19 TX_1_CLKN 19 DIMMING 19 5V
20 TX_1_CLKP 20 GND 20 VCC_3V3_ON
21 GND 21 BACKLIGHT_ON/OFF 21 5V
22 TX_1_DN 22 GND 22 VCC_3V3_ON
23 TX_1_DP 23 STBY_ON/OFF 23 GND
24 TX_1_EN 24 GND 24 GND
25 TX_1_EP 25 MECH_SWITCH 25 -
26 - 26 GND 26 +18_24VA
27 - 27 GND 27 KEY_INFO
28 TX_2_AN 28 GND 28 A/D_DIM_SEL
29 TX_2_AP
30 TX_2_BN
31 TX_2_BP
32 TX_2_CN CN5
33 TX_2_CP 1 GND
34 GND 3 R_AUDIO_P
35 TX_2_CLKN 3 R_AUDIO_N
36 TX_2_CLKP 4 L_AUDIO_P
37 GND 5 L_AUDIO_N
38 TX_2_DN 6 GND
39 TX_2_DP
40 TX_2_EN
41 TX_2_EP
42 OPTION7
43 OPTION6
44 GND
45 GND
46 GND
47 -
48 PANEL_VCC
49 PANEL_VCC
50 PANEL_VCC
51 PANEL_VCC
PANEL
PANEL
LED-IR BOARD
Speaker S
p
eaker
PL809
(AC cable)

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UNDER CONSTRUCTION
Note: Please check back in the future.
TROUBLESHOOTING GUIDE
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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.
FIRMWARE UPDATING PROCEDURE
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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:
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.
HOTEL MODE/HOTEL CLONE
Figure: Hotel TV Menu

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:
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:
Figure: Hotel TV headphone slider bar

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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Global Serial No.
Total digits YWK Model_ID SERIAL Panel
Max 14 YWK xxx ****** **
3 digits 3 digits 6 digits 2digits
(M00001~M99999)
VESTEL
USA -
China -
Asia -
EU P01-P99
Other -
Y:Year 8 2008 Panel vendor and version for the model.
9 2009
A 2010 Marking Marking Marking
B 2011 A J S
C 2012 B K T
… …
CLU
WK :Week 01 WK01 D M V
02 WK02 E N W
03 WK03 F P X
04 WK04 G Q Y
… …
H R Z
53 WK53
Model Information
10073324
10073325
10073323
10073218
10072938
10073217
10074915
10073308
10072934
10072937
10074859
Vestel Product Code
10072929
10072930
10072933
K1
K1
K2
K1
L1
L1
L1
K1
K1
K1
K1
K1
K1
P90
P96
P91
P94
P89
P92
P92
P93
SAM HM07
SAM HA07
SAM HM04
SAM AP06
LG SCC1
LG SCC1
SAM AP06-L02
SAM AP06-L02
SAM HM04
SAM HA02
LG TLG1
SAM AT01
SAM AT01
Panel ID Panel
L1 LG TLG1P84
Model ID
P85
P86
P87
P88
P88
37BV701B
37BV701G
40BV701B
40BV801B
32BV701B
32BV801B
32BV801B
32DV501B
22DV501B
32BV501B
32BV501B
Model
19BV501B
19DV501B
22BV501B
Panel Vendor Panel Vendor Panel Vendor
AUO SHARP
SAMSUNG
CMO LPL/LGD
IPS
CPT

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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 "SAFETY PRECAUTION" AND "PRODUCT SAFETY NOTICE".
Do not degrade the safety of the receiver through improper servicing.
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
All CD and PF capacitors are ±5 %, 50 V and all resistor, ±5 %, 1/6 W unless otherwise noted.
PARTS LIST
Capacitors CD : Ceramic Disk
Resistors CF : Carbon film
OMF : Oxide Metal Film
PF : Plastic Film
CC : Carbon Composition
VR
: Variable Resistor
EL : Electrolytic
MF : Metal Film
FR : Fusible Resistor
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PARTS LIST
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Location Parts No. Description
E200 75027105 PC BOARD ASSY, MAIN, 37BV701B, 20573482
E250 75027104 POWER MODULE, 37BV701B, 20573394
E270 75023113 PC BOARD ASSY, LED, 37BV700B, 20437044
E300 75023114 LCD PANEL, LC370WUN-SCC1, 30068228
E310 75027103 LVDS CABLE, 37BV701B, 20573062
E320 75027109 POWER CORD, 37BV701B, 30070528
E330 75027106 SPEAKER, 37BV701B, 20575798
E340 75027108 CABLE, 37BV701B, 30068954
E360 75022660 CABLE, POWER TO LCD PANEL, 12-14P/300, 40BV700B, 30067986
E400 75020598 REMOCON HAND UNIT, RC3910, 20504562
E100 75023107 FRONT BEZEL ASSY, 37BV700B, 20540993
E110 75023108 BACK COVER ASSY, 37BV700B, 20540994
E120 75022648 STAND ASSY, 40BV700B, 20531968
E125 75027110 SCREW, FOR STAND ASSY, 37BV701B, 35025927
E130 75027112 I/O PLATE, 37BV701B, 40045570
E140 75027111 LENS LED, 37BV701B, 40043120
E500 75027114 CARTON BOX, 37BV701B, 50190359
E520 75027113 EPE, BAG, 37BV701B, 50038543
E580 75023822 SNOW BOX ASSY, 37BV700B, 20420360
E590 75027107 ARTWORK TOSHIBA, 37BV701B, 20579483
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