ADMIRAL EF3912 Schematic

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Contents
2.Preliminary
3.Specification 5
4.Board Layout 6
5.Connector 8
6.Software Update Steps 11
7.Main schematic 12
32" POWER Schematic
32" POWER Schematic
MAIN Schematic
T
roubleshooting 4
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1.Safety Precaution
(1) When moving or laying down a LCD Set, at least two people must work together. Avoid
any impact towards the LCD Set.
(2) Do not leave a broken LCD Set on for a long time. To prevent any further damages,
after checking the condition of the broken Set, make sure to turn the power (AC) off.
(3) When opening the BACK COVER, you must turn off power (AC) to prevent any electric
shock.
(4) When loosening screws, check the position and type of the screw. Sort out the screws and
store them separately for reassembling. Because screws holding PCBs are working as
electric circuit grounding, make sure to check if any screw is missing when assembling /
reassembling. Do not leave any screws inside the set.
(5) A LCD Set contains different kinds of connector cables. When connecting or disconnecting
cables, check the direction and position of the cable beforehand.
(6) Connect/disconnect the connectors slowly with care especially FFC (film) cables and FPC
cables. Do not connect or disconnect connectors instantaneously with force, and handle
them carefully for reassembling.
(7) Connectors are designed so that if the number of pins or the direction does not match,
connectors will not fit. When having problem in plugging the connectors, check their
kind, position, and direction.
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2.Preliminary Troubleshooting
1) LCD TV does not response or remote controller does not work.
- Check the power cord to be plugged.
- Check the battery of the remote controller.
2) Sound is discontinuous or broken sometimes.
- Set the sound effect into 'MONO'.
- Set the [SOUND] -> [Digital Volume] into proper value.
- [Digital Volume] is enabled only in digital program.
- Check if [SOUND] -> [Speaker] is on.
3) Picture of digital program is sometimes broken and sound is discontinuous.
- Digital program has a little problem because of signal receiving status.
- Check if the RF cable is correctly connected.
- Ask for the broadcasting station if the RF cable connection has no problem.
4) Picture of analog program is noisy.
- Check the RF cable connection.
- Check if [Picture] -> [N.R] is ON.
- Change the [Channel] -> [Fine Tune] value.
5) Sound is not generated in HDMI mode.
- Reconnect HDMI jack.
- DVI signal has no sound. Check the output signal of device to be connected to LCD TV.
- If you want to use DVI-HDMI cable, you should also connect audio cable into the LCD TV.
6) In spite of 'Auto Setup', picture size is not completely adapted to the screen in PC mode.
- Check if the input signal is available.
- Ensure that the desktop has no black area.
- Some errors (picture position problem) will be occurred according to certain video
card. In this case, you should adjust 'Phase', 'Clock', 'H.Position', 'V.Position' control.
7) In spite of 'Auto Setup', picture is not clear in the PC mode.
- Adjust 'Phase' control.
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3.Specification
TV input
USB
tuner AIR:ch2~ch69
Cable:ch1~ch125
ATV
ISDB
MUSIC Mp3/wma/m4a/aac
PIC JPEG/jpg/bmp/png
MOVE Avi/mp4/ts/trp/mkv/mov/mpg/dat/vob/rm/rmvb
Input impedance 75 ohm
Video system NTSC,PAL M/N
Sound system M/N
MTS
Tuner receiving range AIR:ch2~ch69
CABLE:ch1~ch135
Input impedance 75 ohm
Input level
C/N
Modulation
Vid eo S ystem MP EG-2 MP@H L
-83~-5dBm(8VSB)
-62~-5dBm (256QAM)
16dB (Air)
28dB (Cable)
QPSK,16QAM,
OFDM(J.83B)
PC-RGB
Vide o Inpu t
Audio Input
Expansion function USB USB 2.0
Power Input 5V,12V
OSD Languages English,Spanish, Portuguese
Amplifier 2x5W (8Ω )
Key Functions KEY1,KEY0
Comb Filter 3D
Deinterlace 3D
Noise reduction 3D
TEXT caption
Panel Resolutions Up to FULL HD
CVBS 1.0 Vp-p +/- 5%
YpbPr 480i, 480p, 576i, 576p, 720p, 1080i, 1080p
HDMI 480i, 480p, 576i, 576p, 720p, 1080i, 1080p
PC-RGB Earphone input terminal
YPbPr L/R RCA input
To P a n e l ( LV D S ) 5 V o r 1 2 V
Management Low power consumption mode: standby< 1W
Format Up to SXGA @75Hz
H-Frequency 30~80KHz
V-Frequency 56~75Hz
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4.Board Layout
main pcb top
CN5 CN26 CN7 CN15 CN10
Power pcb Power pcb Control pcb LCD LVDS speaker
Main board rear view
P6 P5 P8 P9 U17 U17 CON8
Hdmi2 Hdmi1 Pc RGB Pc audio RF CATV earphone
Main board side view
T14 T15
Video in Y Pb Pr
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Main board dimension
Power board view
Power input Main pcb LCD panel Main pcb
<32inch>
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<39inch>
Main board terminal description
RF Input 1 IEC 75Ω
Te r m i n a l s
Ouput
Input
PC-RGB Input
YPBPR Input RCA terminal
HDMI Input HDMI terminal
USB USB terminal
AV Input RCA terminal
EarphoneTerminal Output
D-SUB15Pin
terminal
1earphone terminal
5.Connector
-CN26:
Main Board Power Supply
NO
1,2 GND 12,13 +5.2VSB +12VDC RETURN
3,4 +5V +5VDC INPUT
5 PSON SMPS ON/OFF CONTROL(ON = HIGH)
6 +5VSB STANDBY(+5.0VDC) INPUT
7,8 +5V +5VDC INPUT
9,10,11 GND +5.2VSB +12VDC RETURN
12,13 +12V +12VDC INPUT
SYM
BOL
DESCRI
PTION
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-
CN7:
IR and LED board Interface
PIN No. Definition Description
1 GND GND
CN7-1
4 K5 Volume up
CN7-2
2 KeyA/K7 POWER /RESERVED
3 KeyB/K6 POW ER
5 K4 Vo;ume down
6 K3 SOURCE
7 K2 Ch up
8 K1 Ch down
9 K0 MENU
10 GND Ground
11 IR IR
12 LED-GREEN Green Indicator
13 LED-RED Red Indicator
14 5V +5V DC Power Supply
CN5:
Backlight control
PIN No Definition Description
1 GND Ground
2 GND Ground
3 DIMMING Brightness Adjustment for panel
4 BL_OFF Backlight On/Off Control for Panel
5 BL_12V +12V DC power Supply
BL_12V +12V DC power Supply
CN10:
Speaker Output
PIN No Definition Description
1 R output Audio Right Channel Output
2 GND
3 GND
4 L ouput Audio Left Channel Output
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CN15:
PIN No Definition Description
1 VCC-Panel Power supply for panel
2 VCC-Panel Power supply for panel
3 VCC-Panel Power supply for panel
4 GND Ground
5 GND Ground
6 GND Ground
7 RXO0- LVDS ODD 0- Signal
8 RXO0+ LVDS ODD 0+ Signal
9 RXO1- LVDS ODD 1- Signal
10 RXO1+ LVDS ODD 1+ Signal
11 RXO2- LVDS ODD 2- Signal
12 RXO2+ LVDS ODD 2+ Signal
13 GND Ground
14 GND Ground
15 RXOC- LVDS ODD Clock- Signal
16 RXOC+ LVDS ODD Clock+ Signal
17 RXO3- LVDS ODD 3- Signal
18 RXO3+ LVDS ODD 3+ Signal
19 RXE0- LVDS EVEN 0- Signal
20 RXE0+ LVDS EVEN 0+ Signal
21 RXE1- LVDS EVEN 1- Signal
22 RXE1+ LVDS EVEN 1+ Signal
23 RXE2- LVDS EVEN 2- Signal
24 RXE2+ LVDS EVEN 2+ Signal
25 GND Ground
26 GND Ground
27 RXEC- LVDS EVEN Clock- Signal
28 RXEC+ LVDS EVEN Clock+ Signal
29 RXE3- LVDS EVEN 3- Signal
30 RXE3+ LVDS EVEN 3+ Signal
31 GND Ground
32 GND Ground
33 CON1 Logic Level Control (Default For High Level)
34 DISPLAY PDP Display Enable
35 VSEL1 Reserved Power or I2C SCL
36 VSEL2 Reserved Power or I2C SDA
37 RXO4- LVDS ODD4- Signal
38 RXO4+ LVDS ODD4+ Signal
39 RXE4- LVDS EVEN 4- Signal
40 RXE4+ LVDS EVEN 4+ Signal
LVDS Output
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