Service Manuals, User Guides, Schematic Diagrams or docs for : Samsung LCD Proj LE-26S81BX circuit_description_167
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13 Circuit Descriptions
13 Circuit Descriptions
13-1 Block description
Signal
Power
IP Board
RF IN
Scart 1,2
A/V
S-Video Main
Board Panel
Component T-con
Board
HDMI 1, 2
PC
Speaker
IR/LED
Bordeaux consists of three main blocks
1. Main board : Video signal processing
2. IP board : Power supply & Inverter
3. T-con board : LCD Panel control
13-1
13 Circuit Descriptions
Signal
Power SMPS INVERTER
RF IN
Scart 1,2
A/V
S-Video Main
Board Panel
Component T-con
Board
HDMI 1, 2
PC
Speaker
IR/LED
Bordeaux consists of three main blocks
1. Main board : Video signal processing
2. SMPS : Power supply
3. T-con board : LCD Panel control
13-2
13 Circuit Descriptions
13-2 Main Block
13-3
13 Circuit Descriptions
13-3 SMPS Board
13-3-1 26", 32" Power Block
Line PFC Inverter
Resonance
Filter AC Switching PFC Resonance SMPS
Switching
Part Rectifier Part Rectifier Transformer Output 24V
Part
Rectifier
Part DC/DC Signal
SI-8008HFE 5.3V
AC Input PFC Resonance or AP1501A
(90Vac~264Vac) Controler Controller
Signal
TDA4863 MC33067
13V
Regulator Sound
On/Off KA278R12 12V
Control
On/Off
Stand-By
Controller Output
ST-BY Stand-By
STR-A6159 Rectifier
Transformer 5.2V
Part
13-3-2 26", 32" SMPS Diagram
PFC PFC DC Current
Rectifier Output Resonant Type Trans EER4445
EMI INVERTER
FILTER 24V
INPUT
450V
AC Input 150uF
90V~264V TDA4863 Main
+13V
MC33067 Regulator
Sound
+12V
Trans EE2020
DC/DC V5D
Converter +5.3V
STR-A6159
Stand-By
5.2V
On/Off Power On/Off
Control Signal
13-4
13 Circuit Descriptions
Output Voltage Output Current
Output
Load Characteristics PCB Loc. Usage Remark
Name
Normal Regulation(%) Variable Range Min Typical Peak
24V 24.5V 4 23.52V 0.1V 3.0V 4.0V Pulsating Main B'D Drive -
~25.48V
Drive, Logic,
5.13V Main B'D -
5.3V 5.3V 5 0.1V 3.0V 5.0V Constant Buffer,
~5.67V
Image Digital
12.7V 7 11.9V 0.01V 0.3V 0.5V Constant Image Analog -
13V Main B'D
~13.7V
4 8.83V Sound -
Vamp 9.2V 0.01V 0.3V 1.1V Constant Main B'D
~9.57V
5.58V
ST-BY 8.0V 5 ~8.5V 0.1V 0.3V 0.6V Constant Main B'D Stand-by -
13-5
13 Circuit Descriptions
13-3-5 37" Power Block
Line PFC Inverter
Resonance
Filter AC Switching PFC Resonance SMPS
Switching
Part Rectifier Part Rectifier Transformer Output 24V
Part
Rectifier
Part DC/DC Signal
MC33167 5.3V
AC Input PFC Resonance
(90Vac~264Vac) Controler Controller DC/DC Signal
TDA4863 F9222L LM2576 13V
Regulator Sound
On/Off KA278R12 12V
Control
On/Off
Stand-By
Controller Output
ST-BY Stand-By
Viper22A Rectifier
Transformer 5.2V
Part
13-3-6 37" SMPS Diagram
PFC PFC DC Current
Rectifier Output Resonant Type Trans EER4445
EMI INVERTER
FILTER 24V
INPUT
450V
AC Input 150uF
90V~264V TDA4863 DC/DC Main
Converter +13V
F9222L Regulator
Sound
+12V / +9V
Trans EE2020
DC/DC V5D
Converter +5.3V
Viper22A
Stand-By
5.2V
On/Off Power On/Off
Control Signal
13-6
13 Circuit Descriptions
13-3-7 40, 46" IP Board
Power EMI Filter RFC SWITCHING TRANSFORMER
Input (switching,
(AC90V Inductor) Rectifier 13.0V / 0.4A
~264V) Rectifier
Rectifier 12.0V / 2.5A
Rectifier 5.4V / 43.5A
Feedback
Protection
FWM FWM Opto- Feedback
CONTROLLER CONTROLLER coupler Protection
VCC
On/Off TRANSFORMER
Stand-by Rectifier 6.2V / 0.4A
CONTROLLER
(Switch)
Feedback
Protection
13-3-8 40, 46" IP Board
SWITCHING TRANSFORMER
2nd
Power
Balance
Input LAMP
Resonant Board
(380V)
UVLO Gate
DRIVE
Opto-Coupler / LAMP
Opto-Coupler Pulse-
Transformer
Voltage /
Current /
LAMP /
CONTROLLER Detection
ON/OFF
DIM Feedback
13-7
13 Circuit Descriptions
Memo
13-8
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