Toshiba 40LV685D User manual

SERVICE MANUAL
LCD Color Television
40LV685D Ver. 2.01
This 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), refer to GREEN PRODUCT PROCUREMENT and LEAD-FREE SOLDER.
© TOSHI A CORPORATION
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ADJUSTMENT
Service Mode
Entering to Service Mode
1. Press button once on remote control.
↓
↓↓
↓
2. Press button again and hold button down.
↓
↓↓
↓
Service Mode display
3. While holding the button, press MENU
button on T set.
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Displaying the Adjustment Menu
Press MENU button on T .
Key Function in the Service Mode
The following key entry during display of adjustment menu provides special functions.
Service Mode
Press ↑
↑↑
↑ ↓
↓↓
↓ Press
Adjustment Mode
AUTION: Never try to perform initialization unless you have changed the
memory I .
button (on remote control)
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Selecting the Adjusting Item
Every pressing of PROGRAMME button in the Service Mode changes the adjustment
items in the order of table below. ( button for reverse order)
SETTING & ADJUSTING DATA
[ SERVI E MODE ]
ADJUSTING ITEMS AND DATA IN THE SERVI E MODE:
Note:
The image system data of RCUT-BDR is different by each image format.
The PAL value is indicated in the table.
Test signal selection
Selection of the adjustment items PRO RAMME (on TV or remote control)
Change of the data value Volume +/- (on TV or remote control)
Adjustment menu mode ON/OFF MENU button (on TV)
Initialization of the memory (IC510) "i+" + PRO RAMME button on TV
Reset the count of operating
protect circuit to "00" "i+" + PRO RAMME button on TV
Turn off TV Micro I2C bus communication "i+" + Volume button on TV
"RCUT" selection 1 button
" CUT" selection 2 button
"BCUT" selection 3 button
"CNTX" selection 4 button
"COLC" selection 5 button
"UVTT" selection 6 button
Automatic A/D Adjustment
(PC, Component, Composite (PAL, NTSC)) 7 button
Self diagnostic display ON/OFF 9 button
Item Name of adjustment Address
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Factory preset data will be loaded after setting Model ID data.
(Refer to Initialization of Memory Data of IC510 and setting data of signal board.)
Adjusting the Data
Pressing of OLUME +/- button will change the value of data in the range from 00H to
FFH. The variable range depends on the adjusting item.
Setting TVOP
RCUT RED CUT --
CUT REEN CUT --
BCUT BLUE CUT --
RDRV RED DRIVE --
DRV REEN DRIVE --
BDRV BLUE DRIVE --
BRTC BRI HTNESS CENTER --
COLC COLOR CENTER --
UVTT BASE BAND TINT --
CNTX CONTRAST MAX --
OPT1 TV SET OPTION 1 00F1
OPT2 TV SET OPTION 2 00F2
OPT3 TV SET OPTION 3 00F3
OPT4 TV SET OPTION 4 (PANEL OPT DATA FOR VENDOR & SIZE) 00F4
OPT5 TV SET OPTION 5 00F5
SETID MODEL ID 00FE
OPT6 TV SET OPTION 6 00E8
OPT7 TV SET OPTION 7 00E9
OPT8 TV SET OPTION 8 00EA
HTLID HOTEL ID 00E0
VOLX MAXIMUM VOLUME LEVEL --
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Enter Service Mode and select menu of T OP by pressing P or P during display of
adjustment menu. After selecting T OP, press + or - to set I2C check function to
disable or enable as below.
Setting Panel Option Data
For a complete list of OPT4 data values corresponding to the model, see MODEL ID
TABLE.
Enter Service Mode and select menu of OPT4 by pressing P or P during display of
adjustment menu. After selecting OPT4, press + or - to set OPT4 value as table
below.
OPT4
Ex. OPT4 value 0x65 indicates that panel vendor is SAMSUNG and panel size is 32.
Upper 4bit is decided as below table.
Lower 4bit is decided as below table.
TVOP FUN TION DES RIPTION 1 0 (Normal)
D5 (bit5) I2C check between TV-Micro and Standby-Micro (WDT) Disable Enable
OPT4 (Upper 4bit)
D7
(bit7)
D6
(bit6)
D5
(bit5)
D4
(bit4)
D3
(bit3)
D2
(bit2)
D1
(bit1)
D0
(bit0)
Panel
vendor
L D 0 0 0 1
SHARP 0 0 1 0
CMO 0 0 1 1
AUO 0 1 0 0
IPS 0 1 0 1
SAMSUN 0 1 1 0
OPT4 (Lower 4bit)
D7
(bit7)
D6
(bit6)
D5
(bit5)
D4
(bit4)
D3
(bit3)
D2
(bit2)
D1
(bit1)
D0
(bit0)
Panel size 32 0 1 0 1
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onvert from Bit (Binary) to Hex
The table for converting from bit (D7-D0) to hex (0x**).
37 0 1 1 0
40 1 1 1 0
42 0 1 1 1
46 1 0 1 0
47 1 0 0 0
52 1 0 1 1
55 1 1 0 0
BIT (Binary)
High nibble D7 D6 D5 D4
Low nibble D3 D2 D1 D0
HEX 00 0 0 0
10 0 0 1
20 0 10
30 0 1 1
4010 0
50101
601 1 0
70111
8 1 000
9 1 0 0 1
A 1 010
B 1 01 1
1 1 0 0
D 1 1 01
E 1 1 1 0
F 1 1 1 1
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E.g. If Bit D7-0 = 0101 1010, Hex data is 0x5A.
Exit from Service Mode
Pressing POWER button to turn off the T once.
Initialization of TV Micro Data
After replacing Digital Board, the following initialization is required.
1) Enter Service Mode.
2) Select menu of ID by pressing P or P during display of adjustment menu in the
Service Mode.
3) Change ID data into MODEL ID to initialize by pressing + or -, refer to
"MODEL ID TABLE".
For example, if want to initialize 40L 685D, change MODEL ID into "0x3E".
Note:
MODEL ID is hex value.
4) Execute initialization of the memory.
Refer to "KEY FUNCTION IN THE SER ICE MODE".
Press "i+" + PROGRAMME button on T .
5) Enter Service Mode and select ersion Check Mode. Confirm if the model name and
MODEL ID set is correct. If not, do over again from the start.
Note:
In case initialization by setting wrong MODEL ID is done, there is a possibility of
abnormal display.
6) Check the picture carefully. If necessary, adjust any adjustment item above.
Perform "Auto tune" on the owner's manual.
MODEL ID TABLE
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Initializing Data setting flowchart after replacing the Signal Unit
Test Signal Selection
Every pressing of button on the remote control changes the built-in test patterns on
screen as described below in Service Mode.
MODEL ID (HEX) Model name Panel vendor OPT4 Data (HEX)
0x3D 32LV685D/LV675D SAMSUN 0x65
0x3E 40LV685D/LV675D SAMSUN 0x6E
0xE5 32LV665D SAMSUN 0x65
0xE6 40LV665D SAMSUN 0x6E
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Self Diagnostic Function
1. Press "9" button on remote control during display of adjustment menu in the Service
Mode. The diagnosis will begin to check if interface among IC's is executed properly.
2. During diagnosis, the following displays are shown.
* Self check displays and items are subject to the models.
Picture Signal
Red raster
reen raster
Blue raster
All Black
All White
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