BBK LEM1968DT User manual

SERVICE MANUAL
MODEL
CONTENTS
SAFETY PRECAUTION
SPECIFICATION
BLOCK DIAGRAM
CIRCUIT DIAGRAM
FACTORY MODE&ADJUSTMENT
UPGRADE SOFTWAR
TROUBLE SHOOTING
APPENDIX
（ＳＯＵＲＴＩＯＮ ＭＳＤ３０９）
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Model
Solution
Antenna Impedance
Power Supply
Terminals
ATV System
Video System
Sound System
7MHz/8MHz
MPEG-2, MPEG-4,H.264 video decoding
Touch KEY STANDBY,SOURCE, MENU, CH+/CH-, VOL +/-
LED Indicators
Number Of Preset Channels
COAXIAL,HDMI,VGA,RF,PC Audio IN
Red :Standby Green :On
Tuner Band Standard system with hyper band
Auto Channel Scanning Yes
Picture I.F. 38.90MHz （BG,DK,I）
MSD309
FS With PLL
LEM1968DT / LEM2268FDT / LEM2468FDT
Sound I.F. 33.40 (BG)
32.40MHz(DK,L)
32.90MHz(I)
PAL BG/DK/ I SECAM BG/DK/L
48.25~863.25 MHz
Tuning System
100
75 Ohm Unbalanced
Power supply: AC 100V-240V, 50/60Hz
DTV System
COFDM 2K/8K QPSK, 16QAM, 64QAMDVB-T:
Bandwidth
Receiving VHF (174MHz – 230MHz) UHF (474MHz - 862MHz)
MPEG Audio,Dolby Digital
Front Panel Viewing
USB2.0 Socket
Back Panel Viewing
Ｐｒｏｄｕｃｔ Ｓｐｅｃｉｆｉｃａｔｉｏｎ

Side Viewing
X 1
X 2
X 1
X 1
X 1
X 1
X 1
X 1
X 1
X 1
2.5W
Yes
Yes
Yes
Yes
OSD Language
INNOLUX
MT185GW0
1
18.5”
LED
0.3mm (H) x
0.3mm(V)
1366
768
LG
LM215WF4
21.6”
USB USB2.0 Host
SCART Full SCART
Terminals
Terminals
Audio Output φ3.5 Earphone Jack
Horizontal (dots)
Vertical (Lines)Resolution
Audio
Output Power (1 KHz 10% THD )
NICAM / STEREO
Bass
Treble
Balance
Russian , English
LEM1968DT
Brand
Model
Size
Backlight
Pixel Pitch
TV 75ohm Aerial
Image In
RCA Jack (Black) optional
COAX Output
VGA In D-sub 15 Pin VGA Connector
HDMI Connector
RCA Jack(CVBS) -Yellow
Audio In RCA Audio (L/R) Jack - White/Red
φ3.5 Stereo Jack
LCD Panel
（Only For Reference,
Parameters according to
panel model）
Brand
Model
Size

LED
0.248 mm x
0.248mm
1920
1080
LG
LM230WF5
23.6”
LED
0.265 mm x
0.265mm
1920
1080
1920
1080
Speaker x2pcs
45W Max
≦1W
Note: Specifications are subject to change without notice
Backlight
Pixel Pitch
Resolution Horizontal (dots)
Brand
Horizontal (dots) (Max)
Vertical (Lines) (Max)
4 Ohm /5W
Resolution Horizontal (dots) Vertical (Lines)
Power Consumption
Vertical (Lines)
LEM468FDT
On working
Standby
Support
Resolution(For PC)
Color Black
Remote Control
09F6Customer Code
Remark RC2252
1.5V AAA X2Batteries
LCD Panel
（Only For
Reference,
Parameters according
to panel model）
Pixel Pitch
LEM2268FDT
Model
Size
Backlight

MSD309PX
Demodulator ,Decoder,
SCALER,ADC,Audio/Vid
eo Decoder ……
Headp
hone
Headphone
jack
LCD Panel
Speaker
4
serial
Flash
L/R
Antenna
AV
VGA
PC
Audio
HD I
30PIN 2.0mm
LVDS jack
TDA1517
Amplifier
12V
Power manage
DC/DC & LDO
3.3V
1.2V
5V
1.8V
RGB
Power odule
RF
IF
USB
CVBS&
R/L
MAX3543 DDR 1 DDR 2
CVBS&R/L
Scart
Ｂｌｏｃｋ Ｄｉａｇｒａｍ

L0M05(00)_20110815.sch-1 - Mon Sep 19 10:58:10 2011

L0M05(00)_20110815.sch-2 - Mon Sep 19 10:58:15 2011

L0M05(00)_20110815.sch-3 - Mon Sep 19 10:58:53 2011

L0M05(00)_20110815.sch-4 - Mon Sep 19 10:58:56 2011

L0M05(00)_20110815.sch-5 - Mon Sep 19 10:58:58 2011

L0M05(00)_20110815.sch-6 - Mon Sep 19 10:58:59 2011

IR BOARD SCHEMATICS
TV&DVD KEY BOARD SCHEMATICS

1 2 3 4 5
6
7
8
9
10
12 13 14 11
15
16
18
17
Ｉｎｔｅｒｆａｃｅ Ｄｅｓｃｒｉｐｔｉｏｎ

NO
NONO
NO Ref
RefRef
Ref Description
DescriptionDescription
Description NO
NONO
NO Ref
RefRef
Ref Description
DescriptionDescription
Description
1 J13 COAXIAL Output 10 J2 USB 2.0 jack
2 CON9,CON11 HDMI Input 11 CON1 Speaker Jack
3 CON7 VGA Input 12 CN1(optional) power supply jack
4 J11 RF Input 13 CN9 Key Jack
5 J17 PC Audio Input 14 CN5(optional) 12V power supply jack
6 P1 Full Scart 15 CN11 Inverter Jack
7 CN10 DVD Interface 16 CN2 DVD power supply jack
8 J12 AV Input 17 CON4 LVDS Interface
9 J14 Headphone output 18 CN6 IR Jack
★CN11
CN11CN11
CN11(
((
(6PIN2.0
6PIN2.06PIN2.0
6PIN2.0)
))
) I
I I
Inverter jack
nverter jacknverter jack
nverter jack (Optional)
(Optional) (Optional)
(Optional)
NO. Definition Description
1 12v Power Supply
2 12v Power Supply
3 BLO Black-Light ON/OFF Control
4 Bri Brightness Adjustment
5 GND Ground
6 GND Ground
★CON1
CON1CON1
CON1(
((
(4PIN2.54
4PIN2.544PIN2.54
4PIN2.54)
))
) S
S S
Speaker jack
peaker jackpeaker jack
peaker jack
NO. Definition Description
1 R Right Speaker Output
2 GND GND
3 GND GND
4 L Left Speaker Output
★ CN104
CN104CN104
CN104:
::
:(
((
(4
44
4PIN2.0
PIN2.0PIN2.0
PIN2.0）
））
） K
K K
Key jack
ey jackey jack
ey jack
NO. Definition Description
1 K1 Key 1 (ADC Input)
2 GND GND
3 K2 Key 2 (ADC Input)
4 VCC KEY 5V Power Supply

★CN10
CN10CN10
CN10:
::
: (
((
(7PIN2.0
7PIN2.07PIN2.0
7PIN2.0)
))
) DVD INTERFACE
DVD INTERFACEDVD INTERFACE
DVD INTERFACE(
((
(Optional)
Optional)Optional)
Optional)
NO. Definition Description
1 SCK SPI Communication Protocol SCL
2 SDA SPI Communication Protocol SDA
3 DRIN Right Channel of DVD Audio Input
4 STB SPI Communication Protocol STB
5 DLIN Left Channel of DVD Audio Input
6 CVBS DVD Video Signal
7 GND GND
★CN2
CN2CN2
CN2:
::
: (
( (
(5PIN2.0
5PIN2.05PIN2.0
5PIN2.0)
))
) DVD P
DVD P DVD P
DVD Power jack
ower jackower jack
ower jack (Optional)
(Optional) (Optional)
(Optional)
NO. Definition Description
1 5V DVD 5V Power Supply
2 5V DVD 5V Power Supply
3 GND GND
4 GND GND
5 GND GND
★CN6
★CN6★CN6
★CN6: IR
: IR: IR
: IR&LED jack
&LED jack&LED jack
&LED jack
NO.
Definition Description
1 GND GND
2 IR Remote Receiver
3 LED-G Green Indicator
4 LED-R Red Indicator
5 5V Power Supply
★CN
★CN★CN
★CN5
55
5:
: :
: (
((
(4PIN2.0
4PIN2.04PIN2.0
4PIN2.0)
))
) I
II
Internal power supply jack
nternal power supply jacknternal power supply jack
nternal power supply jack for small size TV
for small size TV for small size TV
for small size TV(Optional)
(Optional)(Optional)
(Optional)
NO. Definition Description
1 12v Internal 12V Power Supply
2 12v Internal 12V Power Supply
3 GND GND
4 GND GND

★CN11
CN11CN11
CN11(
((
(6PIN2.0
6PIN2.06PIN2.0
6PIN2.0)
))
) I
II
Internal power supply jack
nternal power supply jacknternal power supply jack
nternal power supply jack (Optional)
(Optional) (Optional)
(Optional)
NO. Definition Description
1 12V 12V Power Supply
2 GND GND
3 BL_ON Back Light ON/OFF
4 5V_STB 5V Power Supply
5 5V_STB 5V Power Supply
6 GND GND
★
★★
★J2
J2J2
J2:
: :
: (
((
(4PIN2.0
4PIN2.04PIN2.0
4PIN2.0)
))
)
NO. Definition Description
1 5V USB 5V Power Supply
2 D- USB Negative Signal
3 D+ USB Positive Signal
4 GND GND
★C
★C★C
★C0
00
0N
NN
N4
44
4: LVDS I
: LVDS I: LVDS I
: LVDS Interface
nterfacenterface
nterface
NO.
Definition Description
1 LCD-VDD Power for Panel
2 LCD-VDD Power for Panel
3 LCD-VDD Power for Panel
4 GND GND
5 GND GND
6 GND GND
7 GND GND
8 GND GND
9 EDA3+ LVDS EVEN3+ Signal
10 EDA3- LVDS EVEN3+ Signal
11 ECK+ LVDS EVEN Clock + Signal
12 ECK- LVDS EVEN Clock - Signal
13 EDA2+ LVDS EVEN2 + Signal

14 EDA2- LVDS EVEN2 - Signal
15 EDA1+ LVDS EVEN1 + Signal
16 EDA1- LVDS EVEN1 - Signal
17 EDA0+ LVDS EVEN0 + Signal
18 EDA0- LVDS EVEN0 - Signal
19 GND GND
20 GND GND
21 ODA3+ LVDS ODD3 + Signal
22 ODA3- LVDS ODD3 + Signal
23 OCK+ LVDS ODD Clock + Signal
24 OCK- LVDS ODD Clock - Signal
25 ODA2+ LVDS ODD2 + Signal
26 ODA2- LVDS ODD2 - Signal
27 ODA1+ LVDS ODD1 + Signal
28 ODA1- LVDS ODD1 - Signal
29 ODA0+ LVDS ODD0 + Signal
30 ODA0- LVDS ODD0 - Signal

1) How to enter service mode
Press “Source” button on the remote control, then press”2580”, the service menu will be
displayed.
FACTORY MODE AND ADJUSTMENT

2) Service mode description
Color Temp: select a color temperature mode that you want to adjust;
R Gain: red gain for white balance adjusting;
G Gain: green gain for white balance adjusting;
B Gain: blue gain for white balance adjusting;
R Offset: red offset for white balance adjusting;
G Gain: green offset for white balance adjusting;
B Gain: blue offset for white balance adjusting;
Aging: to turn on or off aging mode, optional setting: On /Off;
Auto config: Auto adjust ADC channel difference, only available in VGA mode;
EEprom clear: reset EEPROM data to default value, all users’ program and setting will be
lost;
Panel: select different panel for factory;
TTX language: select Teletext language, optional setting: West East Russia;
DVD source set: to turn on or off DVD source in the user menu, optional setting: On/Off;
Hotel mode: to turn on or off hotel mode, optional setting: On/Off;
Key mode:to turn on or off local keyboard, optional setting: On/Off;
Power on: to setting the power on source, optional setting: TV Other;
Power mode: to setting the power on mode, optional setting: Force on Memory standby;
Volume:to setting the max sound volume when hotel mode is active;
AGC: to setting tuner’s RF AGC value;
Notes:
1ˊcolor temperature adjusting:in different source the white balance can be adjust
separated.the details as below:
1) DVD&YpbPr source use same group color temperature value.
2) TV&Scart source use same group color temperature value.
3) VGA&HDMI source use separated color temperature value.
2ˊAuto Config:please change source to VGA mode and with grey scale pattern then enter
service mode to do this item.