Service Manuals, User Guides, Schematic Diagrams or docs for : Samsung LCD TV BN44-00129C BN44-00129C+Samsung
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13 Circuit Descriptions
13 Circuit Descriptions
13-1 Overall Block Structure
13-1-1 Power Tree
1. When the AD board is in DPMS state:
1.1 The IP has been designed so that it operates with a power consumption of less than 0.6W of.
1.2 The Scaler consumes power up to 37mA
1.3 The power to the panel is switched off
2. When the AD board is operating normally:
2.1 The maximum power consumption of the panel lamps is described below (It may vary depending on
the panel manufacturer)
17" : 4*(7.5mA*650mVrms)=4*4.9=19.6W
19: : 4*(7.5mA*720mVrms)=4*5.4=21.6W
2.2 The power consumption of the Panel Control board is as follows: 5V*720mA=3.6W
2.3 The power consumption of the Scaler is as follows: 3.3V*245mA + 1.8V*300mA = 1.35W
13-1
13 Circuit Descriptions
13-1-2 Main Board Parts
LS17PEA, LS19PEA
LS19PEB
13-2
13 Circuit Descriptions
1. Inverter: A conversion device that converts DC 6. SCALER & EEPROM: I2C is a two-way serial
rated voltage/current to high ones necessary bus of two lines that supports communications
for the panel lamp. across the integrated circuits as well as
between FLASH and EEPROM.
2. DC/DC(Regulator): General term for DC to DC In particular, FLASH and Scaler (GM5726) use
converting devices. the SDR direct bus for mutual communications,
The IP board receives 5V and outputs 1.8 or which is an effective, speedy system because it
3.3V that is supplied to the scaler (GM5726). allows 4 additional address/data lines com-
pared to the old serial systems.
3. Power MosFET: The IP board receives 5V and
outputs a lower voltage in DPMS mode and 7. Function Key: A certain keystroke generates a
supplies the whole 5V for the panel operating certain electrical potential, which is transferred
board in normal conditions. In that case, the into ADC input port of the Scaler and then con-
switching of Power MosFET is controlled by verted to a digital value by the A/D converter of
Micom. the chip. The digital value (data) is a clue to
which key is entered. In practical, the voltage
4. Scaler: Receives the digital TMDS and analog levels are set as below.
R,G,B signals and convert them to proper reso-
lutions using up- or down- scaling that are
transferred to the panel in the LDVS formats.
5. Crystal(Oscillator): Use one 14.318MHz oscilla-
tor externally to supply power to both MCU and
Scaler at the same time.
13-3
13 Circuit Descriptions
13-1-3 IP BOARD BLOCK(POWER) Parts
13-1-4 IP BOARD BLOCK( INVERTER ) Parts
13-4
13 Circuit Descriptions
13-1-5 IP BOARD ( inverter ) PROTECTION Parts
Pebble INVERTER CONTROLER FAN7310 have 2-way of the PROTECTION MODE.
1. OVP[Over Voltage Protection] : If the Voltage of the series capacitors C10 & C15 is over the 2.0V, the
Inverter latched-off.[See the Picture1]
2. OLP[Over Load Protection] : If the inverter output harness is opened(No-output current), the base of the
Q1 turns on and chage the C9 ovter 2V and then, the Inverter latched-
off[See the Picture2]
Figure 1.
Figure 2.
13-5
13 Circuit Descriptions
13-2 Trouble Shooting
13-2-1 IP BOARD(Power)
Power On
No
Check fuse Change FUSE
Yes
3 pin of FDM0565R No
Vcc system in normal: HIGH Check the Vcc system
Yes
1 pin of FDM0565R No
Check the drain system Check the main switching
Normal: Switching
Yes
Check the No No Check the
Check the output current
protection system feedback system
Yes
Check others
Harness, Inlet
13-6
13 Circuit Descriptions
13-2-1 IP BOARD(Inverter)
Power On
No
Check the 13V line Check the power system
Yes
1 and 2 pins of FDM0565R No Check the IC drive
Check Protection Check MOSFET
Normal:0.6V~0.8V
Yes
1 and 2 pins of FDM0565R No
Check Protection Check the OVP and OLR
Normal:0.6V~0.8V circuits
Yes
Check any dimming No No Check the feedback
circuit Check the output current system
Yes
Check others
13-7
13 Circuit Descriptions
13-3 IP BOARD(Power) Schematic Diagrams
13-8
13 Circuit Descriptions
13-4 IP BOARD(Inverter) Schematic Diagrams
13-9
13 Circuit Descriptions
Memo
13-10
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