Coby TFTV3225S2 Service Manual
Service Manual
Service Manual
TELEVISION SET
WITH 32” 16:9 TFT LCD PANEL
Model : TFTV3225S2
Copyright 2010 COBY Electronics Co., Ltd.
All Right Reserved
Sep. 30th, 2010 (Version 1.3) Page 1 / 21
Service Manual
CONTENTS
Notes For Installation………………………………………………………………..3
Specifications…………………………………………………………………………4
Block Diagram………………………………………………………………...……...7
PCB Mechanical Dimension………………………………………………………..8
Board Connectors Pin Assignment……………………………………………...9
Exploded View………………………………………………………………….……13
Schematic…………………………………………………………………………….14
Trouble Shooting Flow Chart……………………………………………………..19
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Service Manual
Notes For Installation
This television set with 32’’ FT LCD panel, is designed mainly for receiving ATSC/NTSC system
TV source,or other sources such as DVD player and personal computer(TFDVD3295S2 Model),
via all diffident kinds of cables. This section provides some guidelines for assembly and
preparation of a finished display solution.
Preparation : Before proceeding, it is important to familiarize yourself with the parts making up the TV
Set and the various connectors, mounting holes, and general layout of the TV Set.
All connectors have their own number printed on the PCB board. And their signal
arrangements are shown in the following relevant sections.
4 LCD Panel : This TV Set has 12V,LVDS interface logic on the main board, for 32” TFT LCD panel.
Due to the different signal timing and electrical characteristics from each LCD panel
manufacturer, we need to use different Firmware, different LCD interface cable for
LCD panel even on the same board.
Inverter : Each LCD panels have their own inverter to obtain optimum performance and long lifetime.
Because, Each LCD panel makers use different type of back light tubes for their all different
models and inverter drives the tubes directly.
The main board of this TV Set just supplies the power for inverter logic and controls a light On/off signal
and a brightness control signal. So, it is important to use the inverter that has proper driving capacity and
control input signal. Generally speaking, the inverter is attached to TFT LCD panel, you should contact
with panel maker for any problem with the inverter.
Inverter cable : This cable supplies Inverter’s power, an on/off control signal and a brightness control
signal to the inverter.
OSD Button : See Operational Function section.
3 Color LED : This LED shows the state of TV Set.
• Green – Normal state
• Red – Stand-by mode
AC power input : 100Vac~240Vac(50/60Hz) is required to supply enough power for the TV Set.
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Service Manual
Specification
Electrical Specification
a. Power Consumption: (Include Inverter and LCD Panel)
Operation mode
Power Consumption : 32’’ 150 Watt(Max)
Audio AMP : 9 +/-1Watt (Reference : Speaker 9W×2)
Power Saving mode (STB) : ≦1 Watt
b. Power Supply
Input for Main board : +12/5Vdc
Output for LCD Panel :32’’ 12Vdc
c. Environment
Operation Temperature : 0° ~ 45°
Storage Temperature : -20° ~ 70°
Operation Humidity : 0%~80% (non-Condensing)
Storage Humidity : 0%~90%
d. Output Data Type
LDVS mode : 8bit data output.(single LVDS output)
e. Input Refresh Rates : fH: 30~60KHz, fV: 60~75Hz
Power Board Specification
a. AC Input Requirements
Normal Voltage : 100 to 240 Vrms
Voltage Range : 90 to 264 Vrms
b. Frequency
Normal Frequency : 50 to 60 Hz
Frequency Range : 45 to 65 Hz
Pin-CON15 Connection to main board
NO. PIN Connection Function
9,10 +12V For tuner power and amp
6,7 +5V For scaler power and decoder power
4,5,8,11,12 GND +12/5Vdc return
1 ON/OFF
2,3 +5VSB MCU +5V, in standby power
Pin-CON3 for inverter PUB
NO. PIN Connection Function
1,2 GND For tuner power and amp
3 ADJ Adjuct backlight
4 ON/OFF Cut on/off panel backlight
5,6 +12 (out put) For inverter power
Work / standby mode （H working, L standby）
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Service Manual
Television Part
Item Specification
TV SYSTEM ATSC/NTSC
SOUND
EXT.
TERMINAL
CAPTION CLOSED YES
Parental Control YES
PIP/POP NO
TV SYSTEM STEREO/MONO
SOUND OUTPUT 9W X 2
ASP YES
EFFECT No
COMPONENT 1
(YPbPr)
AV IN
PHONES YES
TUNER DIGITAL+Analog tuner(TCL)
Y/Pb/Pr INPUT
VIDEO, Y/C INPUT
AUDIO L/R INPUT
HDMI IN
RGB (PC-VGA15) Part
a. Features of Analog RGB Part
. Horizontal Rate: 31KHz ~ 60KHz
. Vertical Rate: 43 ~ 85Hz
. Maximum Pixel Rate: 78.75MHz
. Resolution Maximum: 32’’ 1280 x 1024
. Color Maximum: 262,114/16.7M(option)
. Sync type: H & V separate
. Plug & Play: YES DDC
b.
This board can detect all VESA standard Graphic modes (for Analog RGB) shown on the table below and provide more
VGA(PC) IN
VGA(Analog RGB) INPUT
PC-AUDIO(L/R) INPUT
DIGITAL AUDIO AND VIDEO (VIDEO AT RESOLUTION UP TO
1080P)
clear and stable image on a screen.
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Service Manual
Standard Format Total Pixels x Total Lines
Horizontal rate
(KHz)
720 x 400p 70 Hz 900 x 449 31.5 28.0
640 x 480p 60 Hz 800 x525 31.5 25.2
Pixel Clock Rate
(MHz)
VGA
SVGA
XGA
SXGA
640 x 480p 67Hz 864 x 525 35.0 30.0
640 x 480p 72 Hz 832 x 520 37.9 31.5
640 x 480p 75 Hz 840 x 500 37.5 31.5
800 x 600 56 Hz 1024 x 625 35.2 36.0
800 x 600 60 Hz 1056 x 628 37.9 40.0
800 x 600 72 Hz 1040 x 666 48.1 50.0
800 x 600 75 Hz 1056 x 625 46.9 49.5
832 x 624 75 Hz 1152 x 667 49.7 57.5
1024 x 768 60 Hz 1344 x 806 48.4 65.0
1024 x 768 70 Hz 1328 x 800 56.4 75.0
1024 x 768 75 Hz 1312 x 800 60.0 79.0
1280 x 1024 75 Hz 1688 x 1066 39.2 135.0
1152 x 870 75 Hz 1456 x 916 68.9 100.0
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Service Manual
Block Diagram
Note:
1) The flash’s capability will be 32 mb(4MB) while adopt firmware which is more effective and stable
2) The Tuner may also be used with DA58CT-6-E.
3) Key & IR part will be divided into three PCB boards. A IR PCB board, a light board ( standby mode is blue low-light, the
work mode does not shine or high-lights, you can press the light button on the remote control to select the low-light
or high-light), another piece of the key board.
Note:
The TFTV MODEL is supplied by Coby, you can contact with COBY service department
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