Service Manuals, User Guides, Schematic Diagrams or docs for : Samsung Monitor Samsung_BN44-00124D_[SCH]
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13 Circuit Descriptions
13 Circuit Descriptions
13-1 Overall Block Structure
13-1-1 Power Tree
AP1084 ~ 3.3
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
SCALER
GM5726-LF
1. Inverter: A conversion device that converts DC 6. Scaler & EEPROM: I2C is a two-way serial bus
rated voltage/current to high ones necessary 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, MCU(SE657MRH-LF) and use the
converting devices. 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 allows 4 additional address/data lines com-
(SE657MRH-LF). pared to the old serial systems.
3. Power MosFET: The IP board receives 5V and 7. Function Key: A certain keystroke generates a
outputs a lower voltage in DPMS mode and certain electrical potential, which is transferred
supplies the whole 5V for the panel operating into ADC input port of the MCU and then con-
board in normal conditions. In that case, the verted to a digital value by the A/D converter of
switching of Power MosFET is controlled by the chip. The digital value (data) is a clue to
Micom. which key is entered. In practical, the voltage
levels are set as below.
4. Scaler: Receives the digital TMDS and analog
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
oscillator externally to supply power to both
MCU and Scaler at the same time.
13-2
13 Circuit Descriptions
13-1-3 IP BOARD BLOCK(SMPS) Parts
13-1-4 IP BOARD BLOCK( INVERTER ) Parts
13-3
13 Circuit Descriptions
13-1-5 IP BOARD ( inverter ) PROTECTION Parts
BIZET 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.
13-4
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
13-5
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
13-6
13 Circuit Descriptions
13-3 IP BOARD(Power) Schematic Diagrams
13-7
13 Circuit Descriptions
13-4 IP BOARD(Inverter) Schematic Diagrams
13-8
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